Answers
Answer: it is 3/2x x + 0
Step-by-step explanation:
you do rise over run which is 3 up and 2 over in this case. and the 0 is the y intercept but its at the center also known as the origin so its 0
Answer:
Step-by-step explanation:
Related Questions
Joey deposits $6000 each into the two savings accounts described below. If he doesn’t make any other deposits or withdrawals, find the combined amount of accounts after 10 years.
Account 1
3.5% annual simple interest
Account 2
3.5% annual compound interest
Answers
The combined amount in both accounts after 10 years is $16,869.58
What is formula of simple interest and compound interest ?To solve the problem, we need to use the following formulas:
Simple Interest = Principal x Rate x Time
Compound Interest = [tex]Principal * (1 + Rate/ n)^{n * Time}[/tex]
where:
Principal = the initial deposit
Rate = the interest rate (in decimal form)
Time = the number of years
n = the number of times interest is compounded per year
For Account 1:
Simple Interest = Principal x Rate x Time
= $6000 x 0.035 x 10
= $2100
The amount in Account 1 after 10 years will be the initial deposit plus the interest earned:
= $6000 + $2100
= $8100
For Account 2:
Since the interest is compounded annually, n = 1.
Compound Interest = [tex]Principal * (1 + Rate/ n)^{n * Time}[/tex]
= [tex]6000 *(1 + 0.035/1)^{1 * 10}\\= $6000 (1.035)^{10}\\= $8769.58[/tex]
After ten years, the amount in Account 2 will be $8769.58.
After ten years, the combined amount in both accounts will be:
$8100 minus $8769.58 equals $16869.58, resulting in a total of $16,869.58 in both accounts after ten years.
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answer asap, 12 points !!!
Answers
Answer:
Step-by-step explanation:
domain is -infinity to positive infinity range is -3 to infinity. Increasing from -3 to infinity and decreasing from - infinity to -3 and it’s minimum
fractions to decimals
Answers
Answer: 1 is .4
2. is .6
3 is .5
4 is .375
5 is .18
6 is .71
7 is .16
8 is .66 repeating
9 is .91
and 10 is .25
Step-by-step explanation:
to get all these and fractions to decimals in the future just divide the numerator by the denominator in other words the top number by the bottom number
1): 0.4
2): 0.67 or 0.7
3): 0.5
4): 0.37 or 0.4
5): 0.18
6): 0.42 or 0.5
7): 0.17
8): 0.7
9): 0.97 or 1
10): 0.25
Solve this proportion 12/m = 18/9
Answers
Answer:
m = 6
Step-by-step explanation:
We have the proportion:
12/m = 18/9
To solve for m, we can cross-multiply the terms in the proportion:
12 × 9 = 18 × m
Simplifying both sides of the equation, we get:
108 = 18m
Dividing both sides by 18, we get:m = 6
Therefore, the solution to the proportion 12/m = 18/9 is m = 6.
Answer: m = 6
Step-by-step explanation:
First, we will rewrite this proportion:
[tex]\displaystyle \frac{12}{m} =\frac{18}{9}[/tex]
Next, we will cross-multiply:
12 * 9 = 18 * m
108 = 18m
Lastly, we will divide both sides of the equation by 18:
m = 6
We can also solve this proportion another way.
We know that 18/9 = 2, so 12/m must equal 2 as well.
12/6 = 2, so m = 6.
need answer by 11:45am
The box plots display measures from data collected when 20 people were asked about their wait time at a drive-thru restaurant window.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 8.5 to 15.5 on the number line. A line in the box is at 12. The lines outside the box end at 3 and 27. The graph is titled Super Fast Food.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 9.5 to 24 on the number line. A line in the box is at 15.5. The lines outside the box end at 2 and 30. The graph is titled Burger Quick.
Which drive-thru typically has more wait time, and why?
Burger Quick, because it has a larger median
Burger Quick, because it has a larger mean
Super Fast Food, because it has a larger median
Super Fast Food, because it has a larger mean
Question 3
A charity needs to report its typical donations received. The following is a list of the donations from one week. A histogram is provided to display the data.
5, 5, 6, 8, 10, 15, 18, 20, 20, 20, 20, 20, 20
A graph titled Donations to Charity in Dollars. The x-axis is labeled 1 to 5, 6 to 10, 11 to 15, and 16 to 20. The y-axis is labeled Frequency. There is a shaded bar up to 2 above 1 to 5, up to 3 above 6 to 10, up to 1 above 11 to 15, and up to 7 above 16 to 20.
Which measure of variability should the charity use to accurately represent the data? Explain your answer.
The range of 13 is the most accurate to use, since the data is skewed.
The IQR of 13 is the most accurate to use, since the data is skewed.
The range of 20 is the most accurate to use to show that they have plenty of money.
The IQR of 20 is the most accurate to use to show that they need more money.
Question 4
The circle graph describes the distribution of preferred transportation methods from a sample of 400 randomly selected San Francisco residents.
circle graph titled San Francisco Residents' Transportation with five sections labeled walk 40 percent, bicycle 8 percent, streetcar 15 percent, bus 10 percent, and cable car 27 percent
Which of the following conclusions can we draw from the circle graph?
Together, Streetcar and Cable Car are the preferred transportation for 168 residents.
Together, Walk and Streetcar are the preferred transportation for 55 residents.
Bus is the preferred transportation for 45 residents.
Bicycle is the preferred transportation for 50 residents.
Question 5
The line plot displays the number of roses purchased per day at a grocery store.
A horizontal line starting at 1 with tick marks every one unit up to 10. The line is labeled Number of Rose Bouquets, and the graph is titled Roses Purchased Per Day. There is one dot above 1 and 2. There are two dots above 8. There are three dots above 6, 7, and 9.
Which of the following is the best measure of variability for the data, and what is its value?
The range is the best measure of variability, and it equals 8.
The range is the best measure of variability, and it equals 2.5.
The IQR is the best measure of variability, and it equals 8.
The IQR is the best measure of variability, and it equals 2.5.
Question 6
The histograms display the frequency of temperatures in two different locations in a 30-day period.
A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 14. A shaded bar stops at 10 above 60 to 69, at 9 above 70 to 79, at 5 above 80 to 89, at 4 above 90 to 99, and at 2 above 100 to 109. There is no shaded bar above 110 to 119. The graph is titled Temps in Sunny Town.
A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 16. A shaded bar stops at 2 above 60 to 69, at 4 above 70 to 79, at 12 above 80 to 89, at 6 above 90 to 99, at 4 above 100 to 109, and at 2 above 110 to 119. The graph is titled Temps in Desert Landing.
When comparing the data, which measure of center should be used to determine which location typically has the cooler temperature?
Median, because Desert Landing is symmetric
Mean, because Sunny Town is skewed
Mean, because Desert Landing is symmetric
Median, because Sunny Town is skewed
Question 7
At a recent baseball game of 5,000 in attendance, 150 people were asked what they prefer on a hot dog. The results are shown.
Ketchup Mustard Chili
63 27 60
Based on the data in this sample, how many of the people in attendance would prefer mustard on a hot dog?
900
2,000
2,100
4,000
Answers
The drive-thru with typically more wait time is Burger Quick, because it has a larger median. The Option A.
Why does Burger Quick have a larger median for wait time?The median is a measure of central tendency that represents the middle value of a set of data. In this case, the median wait time at Burger Quick is 15.5 minutes, while the median wait time at Super Fast Food is 12 minutes.
This indicates that, on average, customers at Burger Quick experience a longer wait time compared to customers at Super Fast Food. The larger median at Burger Quick suggests that there may be some longer wait times skewing the data towards the higher end which could be due to various factors such as slower service, or other operational issues at Burger Quick resulting in a longer wait time for customers at their drive-thru.
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John has 10 ribbons, each measured 3 ½ inches long. How long are the 10 ribbons placed end to end?
Answers
The total length of all 10 ribbons is 35 inches when they are placed end to end.
What are inches?Inches are a unit of length in the imperial system of measurement, which is primarily used in the United States, the United Kingdom, and some other countries. One inch is equal to 1/12 of a foot or 2.54 centimeters.
The inch is commonly used to measure the length or distance of small objects, such as the size of a computer screen, the length of a pencil, or the height of a person. Inches are also used to measure the dimensions of larger objects, such as the width of a door or the size of a piece of furniture.
According to the given informationIf John has 10 ribbons, each measuring 3 ½ inches long, we can find the total length of all the ribbons by multiplying the length of one ribbon by the number of ribbons:
Total length = 10 × 3 ½ inches
To multiply a whole number and a mixed number, we can first convert the mixed number to an improper fraction, then multiply:
Total length = 10 × (7/2) inches
Total length = 35 inches
Therefore, the 10 ribbons, placed end to end, would be 35 inches long.
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The time needed to travel a certain distance varies inversely with the rate of speed. If it takes 10 hours to travel a certain distance at 24 miles per hour, how long will it take to travel the same distance at 54 miles per hour?
Answers
We can use the formula for inverse variation, which states that the product of the time and the speed is constant:
time × speed = constant
Let's use t to represent the time needed to travel the distance at 54 miles per hour. We know that the time is 10 hours when the speed is 24 miles per hour. So we can set up the equation:
10 × 24 = t × 54
Simplifying, we get:
240 = 54t
Dividing both sides by 54, we get:
t = 240/54
Simplifying this fraction, we get:
t = 40/9
So it will take approximately 4.44 hours, or 4 hours and 26 minutes, to travel the same distance at 54 miles per hour.
Which fraction rounds to 5? A. 5 2/3 B. 5 1/2 C. 5 9/20 D. 4 9/20
Answers
the fraction that rounds to 5 is option B, 5 1/2.
What is a fraction?
If the numerator is bigger, it is referred to as an improper fraction and can also be expressed as a mixed number, which is a whole-number quotient with a proper-fraction remainder.
Any fraction can be expressed in decimal form by dividing it by its denominator. One or more digits may continue to repeat indefinitely or the result may come to a stop at some point.
To round a fraction to 5, we need to find the fraction that is closest to 5. Therefore, we need to look at the fractional parts of each option and find which one is closest to 1/2.
A. 5 2/3 = 17/3, which is closer to 6 than to 5.
B. 5 1/2 = 11/2, which is exactly halfway between 5 and 6, so it rounds to 5.
C. 5 9/20 = 259/20, which is closer to 6 than to 5.
D. 4 9/20 = 209/50, which is closer to 4 than to 5.
Therefore, the fraction that rounds to 5 is option B, 5 1/2.
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Find the missing measure.
Answers
The missing angles in the given pair of lines AB and CD with transversals EF & GH intersecting at O & missing sides on the basis of similarity of triangles are:
∠IKF=w°=109°
JO=z=2.7 units
∠JLO=x°=39°
∠DLO=y°=141°
What is similarity?
If two forms or figures have an equal number of comparable sides and angles, they are said to be similar. Similar figures are those when two or more figures share the same shape but have varied sizes.
Given that
∠KIO=39°
∠IKO=71°
∠IOK=70°
IO=12 units
KO=8 units
LO=4 units
a)We know that ∠KIO=∠OLJ {alternate interior angles}
∠KIO=∠OLJ=39°
∴x° = 39°
b)We know that ∠OLJ+∠OLD=180° {linear pair}
x°+y°=180°
39°+y°=180°
y°=180-39
y°=141°
c)We know that ∠IKO+∠IKF=180° {angles on straight line}
71°+w°=180°
w°=180-71
w°=109°
d)In ΔOKI and ΔOJL, we can see that
∠OIK=∠OLJ=39°
∠OKI=∠OJL=71°
∠KOI=∠JOL=70°
as the angles are congruent, we can say that ΔOKI and ΔOJL are similar.
∴Sides will be in same ratio
[tex]\frac{OI}{OL}[/tex] = [tex]\frac{OK}{OJ}[/tex] = [tex]\frac{KI}{JL}[/tex]
Taking [tex]\frac{OI}{OL}[/tex] = [tex]\frac{OK}{OJ}[/tex]
[tex]\frac{12}{4} = \frac{8}{z}[/tex]
3z = 8
z =2.667
z≈2.7 units
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Jackie has $500 in a savings account.The interest rate is 5% per year and is not compounded. How much will she have in total in 1 year?
Answers
Answer:
$525
Step-by-step explanation:
Jackie starts with $500, and the interest rate is 5% per year.
This means that, after one year, Jackie will have accumulated 5% interest with the $500 she put into the savings account.
Now, we can find 5% of $500 by converting 5% to its fraction form, which is 5/100. 5% of a value means that you need to multiply the fraction (or decimal) by the said value. So, we have:
[tex]\frac{5}{100}[/tex] · 500 =
[tex]\frac{2500}{100}[/tex] =
25
Therefore, the amount of interest she has accumulated in one year is $25. Combined with the money in her savings account, she has $525, since $500 + $25 = $525.
A rectangular mural measures 890 centimeters by 2891
centimeters. Hailey creates a new mural that is 66 centimeters
longer
Answers
The perimeter of the rectangular mural after increasing the dimensions by Hailey is equal to 7826 centimeters.
Measures of rectangular mural are,
length = 890 centimeters
Width = 2891 centimeters
New mural is 66 centimeters longer.
The new dimensions of the rectangular mural will be,
New length = 890 cm + 66 cm
= 956 cm
New width = 2891 cm + 66 cm
= 2957 cm
The perimeter of the new mural can be calculated by adding up the lengths of all four sides,
Perimeter = 2(length + width)
⇒Perimeter = 2(956 cm + 2957 cm)
⇒Perimeter = 2(3913 cm)
⇒ Perimeter = 7826 cm
Therefore, the perimeter of Hailey's new mural will be 7826 centimeters.
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The above question is incomplete , the complete question is:
A rectangular mural measures 890 centimeters by 2891centimeters. Hailey creates a new mural that is 66 centimeters longer. What's is the perimeter of Hailey new mural?
deigo has budgeted $35 from his summer job earnings to buy shorts and socks for soccer. He neefs 5 pairs of socks and a pair of shorts. The socks cost different amounts in different stories. The shorts he wants cost $19.95. list some other possible prices for the socks that would still allow diego to stay with in his budget
Answers
Some possible prices for the socks that would meet this condition are $2.99, $2.50, $3.00, $2.95, etc.
Define rateA rate is a measure of the amount of change of one quantity with respect to another quantity. It expresses how much one quantity changes in relation to another quantity over a given time or distance.
If Diego has budgeted $35 for 5 pairs of socks and a pair of shorts, we can subtract the cost of the shorts from the total budget to find the amount he has left for the socks:
$35 - $19.95 = $15.05
To find the possible prices for the socks, we can divide the amount Diego has left by the number of pairs of socks he needs:
$15.05 / 5 pairs = $3.01 per pair
Therefore, Diego would be able to stay within his budget if he finds socks that cost $3.01 or less per pair. Some possible prices for the socks that would meet this condition are $2.99, $2.50, $3.00, $2.95, etc.
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Determine the type of variable for:The number of counties in California.
Qualitative nominal
Quantitative Continuous
Qualitative ordinal
Quantitative discrete
Determine the type of variable for: The stages of childhood: Infant, Toddler, Preschooler, School age, Preteen, Teen
Qualitative nominal
Quantitative Continuous
Qualitative ordinal
Quantitative discrete
Suppose the average time for a class of 28 students (taken from a campus of 1200 students) to drive to campus was 23 minutes.
Select the choice
In the scenario above, 23 minutes is a parameter/ statistic , because 28 students is a sample/ population.
At a Track field, a coach keeps track of an athletes mile time. The coach reported that the mean mile time of a particular athlete was 7 minutes and the standard deviation of the mile time was 1 minute. Assume that the coach also gave us the information that the distribution of the mile time was bell shaped. Use the empirical rule to find:
What percent of the athlete's mile times are expected to be between 6 minutes and 8 minutes?
What percent of the athlete's mile times are expected to be between 4 minutes and 7 minutes?
What percent of the athlete's mile times are expected to be less than 9 minutes?
Answers
The type of variable for,
a. The number of counties in California: Quantitative discrete.
b. The stages of childhood: Qualitative ordinal.
c. In the scenario above, 23 minutes is a statistic, because 28 students is a sample.
d. Between 6 minutes and 8 minutes: Approximately 68% of the athlete's mile times are expected to be between 6 and 8 minutes, according to the empirical rule.
e. Between 4 minutes and 7 minutes: Approximately 68% of the athlete's mile times are expected to be between 4 and 10 minutes, according to the empirical rule.
f. Less than 9 minutes: Approximately 84% of the athlete's mile times are expected to be less than 9 minutes, according to the empirical rule.
In statistics, variables can be categorized into two types: qualitative and quantitative.
Qualitative variables describe characteristics or qualities that cannot be measured numerically, such as gender or hair color.
Quantitative variables, on the other hand, represent numerical values that can be measured or counted.
There are two types of quantitative variables: continuous and discrete. Continuous variables can take any numerical value within a range, such as age or weight.
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Which of the following functions is graphed below?
Answers
Note that the function that is graphed below is y = x + 7.
What is the explanation for the above response?The equation y = x + 7 represents a linear function, where x is the independent variable and y is the dependent variable.
It has a slope of 1, which means that for every unit increase in x, y increases by 1. The y-intercept is 7, which is the value of y when x is zero. This equation can be graphed as a straight line on a coordinate plane, with a positive slope and y-intercept of (0, 7).
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Find the value of x .
J
30°
M
to
K
(2x - 30)°
[
Answers
The value of x in the Intersecting chords is 15
Finding the value of x .From the question, we have the following parameters that can be used in our computation:
Intersecting chords
The value of x is then calculated as
x = 1/2(30 - 2x + 30)
So, we have
2x = 30 - 2x + 30
Evaluate the like terms
4x = 60
Divide
x = 15
Hence, the value of x is 15
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geometry-
A vendor is using an 8-ft by 8-ft tent for a craft fair. The legs of the tent are 9ft tall and the tent top forms a square pyramid with a height of 3 ft. What is the volume, in cubic feet, of space the tent occupies?
Answers
The tent occupies 640 cubic feet of space.
What is volume of a space?Volume is a measurement of the amount of three-dimensional space occupied by an object or substance. It is the measure of the amount of space that an object or substance occupies in three dimensions, typically expressed in cubic units such as cubic meters, cubic centimeters, or cubic feet.
For example, the volume of a cube can be calculated by multiplying its length by its width by its height (or side cubed):
V = l x w x h = [tex]s^3[/tex],
where V is the volume, l is the length, w is the width, h is the height, and s is the length of a side.
Volume is an important measurement in fields such as physics, engineering, architecture, and chemistry, where it is used to calculate quantities such as the amount of fluid that can be held by a container, the amount of material needed to construct a building, or the amount of a substance that can react with another substance in a chemical reaction.
The volume of the tent can be found by calculating the volume of the square pyramid and then adding the volume of the rectangular box formed by the tent's base.
The base of the tent is an 8-ft by 8-ft square, so its area is 8 x 8 = 64 square feet. The height of the pyramid is 3 ft, so its volume is:
V(pyramid) = (1/3) x base area x height
V(pyramid) = (1/3) x 64 x 3
V(pyramid) = 64 cubic feet
The rectangular box formed by the tent's base has dimensions of 8 ft by 8 ft by 9 ft, so its volume is:
V(box) = length x width x height
V(box) = 8 x 8 x 9
V(box) = 576 cubic feet
Therefore, the total volume of space the tent occupies is:
V(total) = V(pyramid) + V(box)
V(total) = 64 + 576
V(total) = 640 cubic feet
So the tent occupies 640 cubic feet of space.
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A sprinkler can water a region with an 8 foot radius. A plant is 4 feet east and 6 feet north of the sprinkler. Is the plant in the sprinkler’s range? Why or why not?
Answers
The plant is not in the sprinkler's range since the distance between the sprinkler and the plant is greater than the radius of the sprinkler's range.
The distance between the sprinkler and the plant can be calculated using the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the lengths of the other two sides.
In this case, the distance between the sprinkler and the plant is the hypotenuse of a right triangle with legs of length 4 feet and 6 feet:
distance = sqrt(4^2 + 6^2)
distance = sqrt(16 + 36)
distance = sqrt(52)
distance ≈ 7.21 feet
Since the distance between the sprinkler and the plant is greater than the radius of the sprinkler's range (8 feet), the plant is not in the sprinkler's range. Therefore, the plant will not receive water from the sprinkler.
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Need help ASAP
there are 600 poetry books at the library.Of the poetry books,8.5 are for children.How many poetry books at the library are for children
Answers
The number of poetry books at the library that are for children is 510
How many poetry books at the library are for childrenfrom the question, we have the following parameters that can be used in our computation:
Books = 600
If 8.5/10 of the poetry books are for children, we can calculate the number of poetry books for children as follows:
Number of poetry books for children = (8.5/10) x 600
Number of poetry books for children = 510
Therefore, there are 510 poetry books at the library for children.
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Indicate the method you would use to prove the two triangles congruent if new method applies, enter none. SSS, ASA, AAS, SAS, none.
Answers
The two triangles are congruent based on the ASA Congruence Postulate.
What is the ASA Congruence Postulate?The ASA Congruence Postulate states that if two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent.
The image shown above shows two triangles that has three pairs of congruent triangles and a pair of corresponding congruent sides.
Therefore, both triangles are congruent by the ASA Congruence Postulate.
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For the function 8-(x-3)^2,
state the domain
Answers
The domain of the function 8 - [tex](x-3)^{2}[/tex] is R which is all the real numbers.
What is domain of a function?
The set or grouping of all potential values that may be used in the function is known as the domain.
We are given a function as 8 - [tex](x-3)^{2}[/tex].
Now, in order to find the domain, we need to find the values where the function is not defined for a value of x.
But, there is no such value for x where the function is not defined.
This means that all values of x give an output.
So, the domain is the set of all the real numbers.
Hence, the domain of the given function is R.
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15. if the integer n has exactly three positive divisors, including 1 and n, how many positive divisors does n2 have?
Answers
Positive divisors does n2 have are 5.
How to calculate how many positive divisors does n2 have?If an integer n has exactly three positive divisors, including 1 and n, it means that n is a perfect square of a prime number.
The reason for this is that a prime number has only two divisors: 1 and itself. Therefore, if n has exactly three positive divisors, n must be a perfect square of a prime number, since the only divisors of a perfect square are the divisors of its square root, and its square root must be a prime number.
Let's say that n is equal to p², where p is a prime number. The positive divisors of n are 1, p, and n (which is p²).
Now, to find the number of positive divisors of n², we can use the fact that any positive divisor of n² can be expressed in the form [tex]p^k[/tex], where 0 ≤ k ≤ 4 (since n² = p⁴).
Therefore, the positive divisors of n² are:
1, p, p², p³, and p⁴ (which is n²)
So, n² has 5 positive divisors: 1, p, p², p³, and n².
Hence, the answer is 5.
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Distance between (7,-2) and (-1,-1)
Answers
Answer: The distance formula between two points (x1, y1) and (x2, y2) is:
d = sqrt((x2 - x1)^2 + (y2 - y1)^2)
Using this formula, we can find the distance between (7, -2) and (-1, -1):
d = sqrt((-1 - 7)^2 + (-1 - (-2))^2)
= sqrt((-8)^2 + (1)^2)
= sqrt(64 + 1)
= sqrt(65)
Therefore, the distance between (7, -2) and (-1, -1) is sqrt(65), or approximately 8.06 units.
Step-by-step explanation:
12' of framing materical can be used to make a rectangular window with a semicircle top. what are the dimensions for the largest area
Answers
The dimension for the largest area is 181 sq ft.
The rectangle has width. [tex]$w$[/tex] and height [tex]$h$[/tex],and let the radius of the semicircle be [tex]$r$[/tex]. We want to maximize the area [tex]$A$[/tex] of the window, which is given by:
[tex]A= 21 \pi r 2 +wh[/tex]
We also have the constraint that the total length of framing material is 12 feet:
[tex]2r+2w+h=12[/tex]
Solving this equation for [tex]$h$[/tex] we get:
[tex]h=12-2r-2w[/tex]
Substituting this expression for [tex]$h$[/tex] into the equation for [tex]$A$[/tex], we get:
[tex]A= 21 \pi r ^2+w(12-2r-2w)[/tex]
Expanding this expression, we get:
[tex]A= 21\pi r^2 +12w-2rw-2w^2[/tex]
To find the values of [tex]$r$[/tex], [tex]$w$[/tex], and [tex]$h$[/tex] that maximize[tex]$A$[/tex], we take the partial derivatives of [tex]$A$[/tex] with respect to each variable, set them equal to zero, and solve for the variables.
We get:
[tex]\partial r/\partial A=\pi r-2w=0 \Rightarrow r= 2w/\pi[/tex]
[tex]\partial w/\partial A=12-2r-4w=0 \Rightarroww= (6-r)/2= (6-2w/\pi)/2=3- w/\pi[/tex]
Substituting the expression for [tex]$w$[/tex] into the equation for [tex]$r$[/tex], we get:
[tex]r= 2/\pi (3-w/\pi )= 6/\pi - 2/\pi^2w[/tex]
Substituting these expressions for [tex]$r$[/tex] and [tex]$w$[/tex] into the equation for [tex]$h$[/tex], we get:
[tex]h=12-2r-2w=12- (4/\pi)w[/tex]
So the dimensions that maximize the area are:
[tex]w= \pi/2,r= 3\pi /4 ,h= (48-8\pi) / \pi[/tex]
The area of the window is:
[tex]A= (1/2)\pir^2 +wh= (1/2)\pi ( 3\pi/4)^2 + (\pi/2)\cdot (48-8\pi)/\pi = 9\pi/8+24-4\pi\approx 18.1 sq ft[/tex]
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Therefore, the dimensions of the largest area rectangular window with a semicircle top that can be made with 12' of framing material are approximately 1.55' * 3.38'. The maximum area is: Area = 4.82 square feet.
To find the dimensions for the largest area of a rectangular window with a semicircle top using 12' of framing material, we need to use optimization techniques.
Let's denote the width of the rectangular window as "w" and the height of the rectangular portion as "h". We also know that the semicircle top will have a radius equal to the width of the rectangular portion, so its diameter will be 2w.
The perimeter of the window is given by:
Perimeter = 2w + h +[tex]\pi w[/tex]
Since we have 12' of framing material available, we can write:
2w + h + [tex]\pi w[/tex] = 12
We can rearrange this equation to solve for h:
h = 12 - 2w - [tex]\pi w[/tex]
The area of the window is given by:
Area = w * h + 1/2 * [tex]\pi w^2[/tex]
Substituting the expression for h from the perimeter equation, we get:
Area = w(12 - 2w - [tex]\pi w[/tex]) + 1/2 * [tex]\pi w^2[/tex]
Expanding and simplifying, we get:
Area = 12w - [tex]2\pi w^2[/tex] - [tex]w^2[/tex]
To find the dimensions that maximize the area, we need to take the derivative of the area equation with respect to w and set it equal to zero:
d(Area)/dw = 12 - [tex]4\pi w[/tex] - 2w = 0
Solving for w, we get:
w = 12/(4\pi+2) ≈ 1.55'
Substituting this value back into the perimeter equation, we can find the height:
h = 12 - 2w - \piw ≈ 3.38'
Therefore, the dimensions of the largest area rectangular window with a semicircle top that can be made with 12' of framing material are approximately 1.55' * 3.38'. The maximum area is:
Area ≈ 4.82 square feet.
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g a generic drug is being tested to test its efficacy (effectiveness) at reducing blood pressure in patients with hypertension (a.k.a. high blood pressure). in a randomized, double-blind experiment with 200 patients, 100 are given the name-brand drug (control group) and 100 are given a generic version of the drug (treatment group). in the control group, the average reduction in blood pressure is 15.2 mmhg with a standard deviation of 11.5 mmhg. in the treatment group, there is an average reduction of 14.6 mmhg and a standard deviation of 12.5 mmhg. neither group has any outliers. a researcher claims that this study shows the generic drug is not as effective as the name-brand drug. what would be the reply of a statistician? you have two attempts for this problem so choose wisely. if you do not receive 5 points in the gradebook after submitting this assignment then you have answered incorrectly. make sure to try it again before the deadline.
Answers
A statistician would reply that in order to determine if the generic drug is less effective than the name-brand drug, a hypothesis test needs to be conducted.
The null hypothesis (H0) would be that there is no difference in the average blood pressure reduction between the two drugs, while the alternative hypothesis (H1) would be that the name-brand drug has a higher average reduction in blood pressure than the generic drug.
To test these hypotheses, a t-test would be appropriate since we have two independent samples (control and treatment groups) with known means, standard deviations, and sample sizes. The t-test will provide a p-value, which can be compared to a chosen significance level (e.g., α = 0.05).
If the p-value is less than the significance level, we reject the null hypothesis and conclude that there is a significant difference in the average blood pressure reduction between the two drugs. If the p-value is greater than the significance level, we fail to reject the null hypothesis, meaning we do not have enough evidence to claim that the name-brand drug is more effective than the generic drug.
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Calculate the slope of the line between pairs of points in each of the tables to determine which table represents a linear function? A. B. C. D.
Answers
Answer:
Table D represents the linear function
y = x + 1.
11
10. Write the expression in the form
ax+b that is equivalent to
(3.6x-1.4)-(1.8x-5.5). Select the
coefficient and constant to complete
the expression.
-5.4
-1.8
1.8
5.4
x +
6.9
4.1
(-4.1)
(-6.9)
Answers
The given expression in the form ax + b will be (B) 1.8x + 4.1.
What are expressions?A finite collection of symbols that are properly created in line with context-dependent criteria is referred to as an expression, sometimes known as a mathematical expression.
An example is the expression x + y, which combines the terms x and y with an addition operator.
In mathematics, there are two different types of expressions: algebraic expressions, which also include variables, and numerical expressions, which solely comprise numbers.
So, we have the expression:
(3.6x-1.4) - (1.8x-5.5)
First, solve it in the form of ax + b as follows:
(3.6x-1.4) - (1.8x-5.5)
3.6x-1.4 - 1.8x+5.5
1.8x + 4.1
So, we have the expression: 1.8x + 4.1
Then, the coefficient and content will be (B) and the correct expression would be 1.8x + 4.1.
Therefore, the given expression in the form ax + b will be (B) 1.8x + 4.1.
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a plane cuts through a sphere with diameter 20 cm, but the closest it gets to the center is 3 cm. what is the area of the intersection of the sphere and the plane in sq cm?
Answers
The area of the intersection of the sphere and the plane in sq cm is 286.46 square centimeters.
The sphere is divided into two equal halves by the plane. The closest point on the plane is 3 cm away from the sphere's center. As a result, a right triangle is formed, with one leg equal to the sphere's radius and the other to the sphere's radius from the plane.
We may calculate the radius of the sphere using the Pythagorean theorem:
r^2 = (20/2)^2 - 3^2
r = sqrt(91) 9.54 cm and r2 = 91
A circle with a radius of 9.54 cm forms the point where the sphere and the plane cross. Its area is therefore: A = r2 A = (9.54)2 A 286.46 sq cm.
The sphere and plane's intersection therefore has a surface area of about 286.46 square centimeters.
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which of the following null hypothesis statistical tests require calculating degrees of freedom? group of answer choices all of the above two-sample t-test chi-squared one-sample t-test
Answers
The two null hypothesis that are correct answer are two-sample t-test and one-sample t-test.
Among the group of answer choices provided, the tests that require calculating degrees of freedom are the two-sample t-test and the one-sample t-test. Both of these tests belong to the t-test family and involve using degrees of freedom to determine the critical t-value.
In summary:
- Null hypothesis: The assumption that there is no significant difference between the sample and population or between two samples.
- T-test: A statistical test used to determine if there is a significant difference between the means of two groups or between a sample and population mean.
- Degrees of freedom: A value used in statistical tests that represents the number of independent values in a data set, which can affect the outcome of the test.
So answer is: two-sample t-test and one-sample t-test.
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The null hypothesis statistical tests that require calculating degrees of freedom are the two-sample t-test and the one-
sample t-test. The degrees of freedom are necessary to calculate the t-value for these tests. The chi-squared test also
requires degrees of freedom, but it is not a test for a null hypothesis.
The correct answer is: all of the above.
All these tests require calculating degrees of freedom:
1. Two-sample t-test:
Degrees of freedom are calculated using the formula (n1 + n2) - 2, where n1 and n2 are the sample sizes of the two
groups being compared.
2. Chi-squared test:
Degrees of freedom are calculated using the formula (rows - 1) * (columns - 1), where rows and columns represent the
number of categories in the data.
3. One-sample t-test:
Degrees of freedom are calculated using the formula n - 1, where n is the sample size.
The null hypothesis statistical tests that require calculating degrees of freedom are the two-sample t-test and the one-
sample t-test. The degrees of freedom are necessary to calculate the t-value for these tests. The chi-squared test also
requires degrees of freedom, but it is not a test for a null hypothesis.
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A chef used some bouillon cubes when making chicken noodle soup. The volume of each of the bouillon cubes was 1/27
cubic inch. How long was an edge of one of the bouillon cubes that the chef used?
Answers
Answer: 1/3
Step-by-step explanation:
1/3x1/3x1/3=1/27
in a(n) , the scale questions are divided into two parts equally and the resulting scores of both parts are correlated against one another.
Answers
The main topic is the split-half reliability test used in psychological research to assess the internal consistency of a scale.
How to test the psychological research?In psychological research, reliability is a crucial aspect of measuring constructs or attributes. One commonly used method for assessing the reliability of a scale is the split-half reliability test.
In this test, the scale questions are divided into two parts equally, and the resulting scores of both parts are correlated against one another.
For example, if a scale had 20 items, the items could be randomly split into two groups of 10 items each.
Scores are then calculated for each group, and the scores are correlated with each other to determine the degree of consistency between the two halves.
The correlation coefficient obtained from this analysis provides an estimate of the internal consistency of the scale.
A high correlation coefficient indicates a high level of internal consistency, indicating that the two halves of the scale are measuring the same construct or attribute.
Conversely, a low correlation coefficient suggests that the two halves of the scale are not measuring the same construct or attribute, and the scale may need to be revised or abandoned.
Overall, the split-half reliability test provides a quick and efficient method for evaluating the reliability of a scale.
However, it is important to note that this method does have some limitations, such as the possibility of unequal difficulty or discrimination of the items in each half of the scale.
Therefore, researchers often use other methods, such as Cronbach's alpha, in conjunction with the split-half reliability test to provide a more comprehensive assessment of the reliability of a scale
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