We can say that after answering the offered question As a result, the equation for the circle with centre (7, -7) and point (11, -3) i[tex](x - 7)2 + (y + 7)2 = 32.[/tex]
What is equation?An equation is a mathematical statement that proves the equality of two expressions connected by an equal sign '='. For instance, 2x – 5 = 13. Expressions include 2x-5 and 13. '=' is the character that links the two expressions. A mathematical formula that has two algebraic expressions on either side of an equal sign (=) is known as an equation. It depicts the equivalency relationship between the left and right formulas. L.H.S. = R.H.S. (left side = right side) in any formula.
Determine the radius:
The radius of the circle is the distance between the circle's centre (7, -7) and any point on it (11, -3).
We may calculate the distance using the distance formula:
[tex]r = \sqrt((11 - 7)^2 + (-3 - (-7))\\v^2)\\r = \sqrt(4^2 + 4^2)\\r = \sqrt(32) (32)[/tex]
In the standard form equation of a circle, substitute the centre and radius:
A circle with centre (h, k) and radius r has the following standard form equation:
[tex](x - h)^2 + (y - k)^2 = r^2[/tex]
With h = 7, k = -7, and r = sqrt(32), we get:
[tex](x - 7)^2 + (y + 7)^2 = 32[/tex]
As a result, the equation for the circle with centre (7, -7) and point (11, -3) is[tex](x - 7)2 + (y + 7)2 = 32.[/tex]
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1. (20 marks) A survey database shows that 20 percent of the adults in country A have been tested for HIV at some point in their life. (a) Suppose that an adult who has been tested for HIV at some point in his life is needed in a study. Some adults are randomly selected from the population of country A in the selection process until the one who has been tested for HIV is found. Let X be the number of adults selected in this process. Show that the cumulative probability P(X≤x)=1−0.8 x . (4 marks) (b) Using the formula of P(X≤x) in (a), find the probability that the number of adults selected in the process are: (i) Three, (ii) Less than five, (iii) Between five and nine, inclusive, (iv) More than five, but less than 10, (v) Six or more. (5 marks) (c) Find the mean and variance of the number of people selected in the above process. (3 marks) (d) Consider a simple random sample of 18 adults. Find the probability that the number of adults who have been tested for HIV in the sample would be: (i) Three, (ii) Less than five, (iii) Between five and nine, inclusive, (iv) More than five, but less than 10 , (v) Six or more. ( 5 marks) (e) Find the mean and variance of the number of people tested for HIV in the sample. (3 marks)
From the given data provided, the probability that number of adults selected in process are 3, less than 5, between 5 and 9, more than 5 but less than 10, 6 or more is 0.096, 0.41, 0.336, 0.232, 0.168 and mean of number of people tested for HIV is 3.6.
(a) The probability that an adult has not been tested for HIV is 1-0.20=0.80. Therefore, the probability that the first adult selected has not been tested for HIV is 0.80. The probability that the first and second adults selected have not been tested for HIV is 0.80 x 0.80=0.64. Continuing in this way, we see that the probability that X adults must be selected until one who has been tested for HIV is found is given by:
P(X≤x) = 1 - 0.80ˣ
(b) Using the formula from (a), we can find the probabilities as follows:
(i) P(X=3) = P(X≤3) - P(X≤2) = (1-0.80³) - (1-0.80²) = 0.096
(ii) P(X<5) = P(X≤4) = 1-0.80⁴ = 0.41
(iii) P(5≤X≤9) = P(X≤9) - P(X≤4) = (1-0.80⁹) - (1-0.80⁴) = 0.336
(iv) P(6≤X<10) = P(X≤9) - P(X≤5) = (1-0.80⁹) - (1-0.80⁵) = 0.232
(v) P(X≥6) = 1 - P(X≤5) = 1 - (1-0.80⁵) = 0.168
(c) To find the mean and variance of X, we first note that X follows a geometric distribution with parameter p=0.20. Therefore, the mean and variance of X are:
Mean of X = E(X) = 1/p = 1/0.20 = 5
Variance of X = Var(X) = (1-p)/p² = 0.8/0.04 = 20
(d) To find the probabilities for a random sample of 18 adults, we use the binomial distribution with parameters n=18 and p=0.20. The probabilities are:
(i) P(X=3) = (18 choose 3) x 0.20³ x 0.80¹⁵ = 0.236
(ii) P(X<5) = P(X≤4) = Σ(18 choose x) x 0.20ˣ x 0.80⁽¹⁸⁻ˣ⁾ for x=0 to 4 = 0.678
(iii) P(5≤X≤9) = Σ(18 choose x) x 0.20ˣ x 0.80⁽¹⁸⁻ˣ⁾ for x=5 to 9 = 0.286
(iv) P(6≤X<10) = Σ(18 choose x) x 0.20ˣ x 0.80⁽¹⁸⁻ˣ⁾ for x=6 to 9 = 0.207
(v) P(X≥6) = 1 - P(X≤5) = 1 - Σ(18 choose x) x 0.20ˣ x 0.80⁽¹⁸⁻ˣ⁾ for x=0 to 5 = 0.322
(e) The mean and variance of X for a sample of 18 adults are:
Mean of X = E(X) = n x p = 18 x 0.20 = 3.6
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How do you solve for x?
Answer:
Step-by-step explanation:
Using little bottom triangle:
[tex]y^2=10^2+20^2[/tex] (Pythagoras Theorem)
[tex]y^2=500[/tex]
Using big triangle:
[tex]y^2+z^2=(10+x)^2[/tex] (Pythagoras Theorem)
[tex]500+z^2=(10+x)^2[/tex] (Since we know [tex]y^2=500[/tex])
[tex]500+z^2=x^2+20x+100[/tex]
[tex]z^2=x^2+20x-400[/tex] [tex](a)[/tex]
Using little top triangle:
[tex]z^2=x^2+20^2[/tex] (Pythagoras Theorem)
[tex]z^2=x^2+400[/tex] [tex](b)[/tex]
Substitute [tex](a)[/tex] into [tex](b)[/tex]:
[tex]x^2+20x-400=x^2+400[/tex] (since we know both sides[tex]=z^2[/tex])
[tex]20x=800[/tex]
[tex]x=40[/tex]
what is the length of sides 1 and 2 of the triangles show work
The length of the side 1 and side 2 of the triangle shown is determined as 2x² + 4.
What is the length of side 1 and side 2 of the triangle?The length of side 1 and side 2 is calculated by adding the respective together as shown below.
side 1 + side 2 = ( 3x² - 4x - 1 ) + ( 4x - x² + 5 )
To add these two expressions, we need to combine like terms.
First, let's write the expressions in descending order of degree:
( 3x² - 4x - 1 ) + ( 4x - x² + 5 )
= 3x² - x² - 4x + 4x - 1 + 5 (grouping like terms)
= 2x² + 4 (combining like terms)
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One state has a 6% sales tax on clothing items priced at $75 or higher, and no sales tax on clothing items priced under $75. What is the total tax on the items in the table above?
The total tax on the items is $6.12.
What is tax?Tax is a financial charge or other levy imposed upon a taxpayer (an individual or other legal entity) by a state or the functional equivalent of a state such that failure to pay is punishable by law.
The total amount of the items purchased is $102+$60+$35 = $197.
Raincoat is priced at $102 which is higher than $75 and is subject to 6% sales tax.
Therefore, the tax on raincoat is $102 x 6% = $6.12.
Slacks and shirt is priced below $75 and are not subject to sales tax. Therefore, the tax on slacks and shirt is $0.
The total tax on the items purchased is $6.12 + $0 = $6.12.
Hence, the correct answer is $6.12.
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A central angle has a measure of 2. 3 radians and the subtended arc length is 12 cm. What is the radius of the circle to the nearest 10th
If A central angle has a measure of 2. 3 radians and the subtended arc length is 12 cm, then the radius of the circle is approximately 5.2 cm.
The formula relating the central angle, radius, and arc length of a circle is:
arc length = radius × central angle
We can use this formula to find the radius of the circle, given the central angle and arc length.
Substituting the given values, we get:
12 cm = r × 2.3 rad
Solving for r, we divide both sides by 2.3 rad:
r = 12 cm / 2.3 rad
Using a calculator, we get:
r ≈ 5.2174 cm
Rounding to the nearest tenth, we get:
r ≈ 5.2 cm
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A rectangle has a width of 3 cm and a length of 10 cm. what is the effect on the perimeter when the dimensions are multiplied by 10? responses the perimeter is increased by a factor of 10. the perimeter is increased by a factor of 10. the perimeter is increased by a factor of 40. the perimeter is increased by a factor of 40. the perimeter is increased by a factor of 100. the perimeter is increased by a factor of 100. the perimeter is increased by a factor of 400.
The perimeter of a rectangle is given by the formula P = 2(l+w), where l is the length and w is the width of the rectangle. The correct answer is that the perimeter is increased by a factor of 10.
In this case, the width is 3 cm and the length is 10 cm, so the initial perimeter is:
P = 2(10+3) = 26 cm
Now, if we multiply the dimensions by 10, the new length would be 10 x 10 = 100 cm and the new width would be 3 x 10 = 30 cm. The new perimeter would then be:
P' = 2(100+30) = 260 cm
Comparing the initial perimeter to the new perimeter, we can see that the new perimeter is 260/26 = 10 times larger than the initial perimeter. Therefore, the correct answer is that the perimeter is increased by a factor of 10
It's important to note that the word "factor" is often used to describe the degree to which something changes. In this case, a factor of 10 means that the new perimeter is 10 times larger than the initial perimeter. If we were to use the word "increase" instead, we would say that the perimeter is increased by 250% (or 2.5 times).
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A city has 5 new houses for every 8 old houses. If there are 30 new houses in the city, how many old houses are there?
Answer: 48 old houses
Step-by-step explanation:
Ratio 5:8
Ratio 30:?
30/5=6
8 x 6= ...
48!!!
30:48
did this make sense??
Calculate how far a ball would be hit if it was hit at an angle of 25° and a velocity of 80 mph.
The distance that the ball was hit, considering that it was hit at an angle of 25° and a velocity of 80 mph, is given as follows:
d = 99.7 meters.
How to obtain the distance that the ball was hit?First we must obtain the time that the ball was in the air, and the equation is given as follows:
t = 2vy/g.
In which:
vy is the y-component of the velocity.g is the gravity.The y-component of the velocity is given as follows:
vy = vsin(y)
vy = 35.71 x sine of 25 degrees. (35.71 m/s = 80 mph)
vy = 15.1 m/s.
As the gravity is of 9.81 m/s², the time is given as follows:
t = 2 x 15.1/9.81
t = 3.08 s.
The distance is then given as follows:
d = Vxt.
d = 35.71 x cosine of 25 degrees x 3.08
d = 99.7 meters
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If $4000 is invested at 7% interest per year compounded continuously, how long will it take to double the original investment?
it will take about 9.90 years to double the initial investment of $4000 at 7% continuous compound interest.
We can use the formula for continuous compound interest:
[tex]A = Pe^(rt)[/tex]
where A is the amount of money after time t, P is the principal (initial investment), r is the interest rate, and e is the mathematical constant approximately equal to 2.71828.
To find the time it takes to double the initial investment, we want to solve for t when A = 2P (twice the initial investment). Substituting the given values, we have:
[tex]2P = Pe^(rt)[/tex]
Dividing both sides by P, we get:
[tex]2 = e^(rt)[/tex]
Taking the natural logarithm (ln) of both sides, we have:
[tex]ln(2) = ln(e^(rt))[/tex]
ln(2) = rt * ln(e)
Since ln(e) = 1, we can simplify further to:
ln(2) = rt
Solving for t, we get:
t = ln(2) / r
Substituting the given values, we have:
t = ln(2) / 0.07
t ≈ 9.90 years
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House Loan
Cost: $450,000
Length of Loan: 30 Years
Simple Interest Rate: 6.00%
Yearly Taxes: $2,000
Yearly Insurance: $1,500
What are your Monthly Payments with taxes & insurance:
Answer:
M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1]
where M is the monthly payment, P is the principal (the cost of the house minus the down payment), i is the monthly interest rate (6.00% divided by 12), and n is the total number of payments (30 years times 12 months per year).
Plugging in the values, we get:
P = $450,000 - 0 (assuming no down payment)
i = 0.06 / 12 = 0.005
n = 30 x 12 = 360
M = $450,000 [ 0.005(1 + 0.005)^360 ] / [ (1 + 0.005)^360 - 1] = $2,695.55
So the monthly mortgage payment is $2,695.55.
To find the monthly payment with taxes and insurance, we need to add the yearly taxes and insurance and divide by 12 to get the monthly amounts. So:
Monthly Taxes = $2,000 / 12 = $166.67
Monthly Insurance = $1,500 / 12 = $125.00
Total Monthly Payment with Taxes and Insurance = $2,695.55 + $166.67 + $125.00 = $2,987.22
Therefore, the monthly payments with taxes and insurance for the $450,000 house loan are $2,987.22.
Traditionally, authors of textbooks on tests and measurements have suggested that, at a minimum, a test should have a test-retest reliability of .70 to be considered sufficiently reliable to use for the assessment of individuals. Using this criterion when evaluating the test-retest reliability coefficients for middle adolescents, which variables measured by the test are sufficiently reliable?
Based on the given criterion, the variables that are sufficiently reliable for middle adolescents are creativity, critical thinking, and cognitive ability
Traditionally, authors of textbooks on tests and measurements have suggested that, at a minimum, a test should have a test-retest reliability of .70 to be considered sufficiently reliable to use for the assessment of individuals. Using this criterion when evaluating the test-retest reliability coefficients for middle adolescents, the variables measured by the test that are sufficiently reliable are as follows:In this scenario, the variables measured by the test, which are sufficiently reliable for middle adolescents, can be determined by identifying the variables whose test-retest reliability coefficients are greater than or equal to 0.70. It can be observed that variables such as creativity, critical thinking, and cognitive ability are all variables that are considered reliable for middle adolescents. Therefore, based on the given criterion, the variables that are sufficiently reliable for middle adolescents are creativity, critical thinking, and cognitive ability.A reliability coefficient is a statistical method used to assess the reliability of a measurement by determining the consistency of scores obtained by the measurement instrument. A test-retest reliability is a statistical method used to determine the reliability of a test's measurements by comparing the scores obtained from taking the same test multiple times over a period of time. The coefficient of test-retest reliability measures the consistency of test scores over time, indicating whether a test is stable and reliable enough to be used as an assessment tool.
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X = 5y - W
make W the subject
Pls help
Answer:
W = -X + 5y
Step-by-step explanation:
Now we have to,
→ Find the required value of W.
The equation is,
→ X = 5y - W
Then the value of W will be,
→ X = 5y - W
→ 5y - W = X
→ -W = X - 5y
→ [ W = -X + 5y ]
Hence, value of W is -X + 5y.
Find the value of x in the regular octagon when each angle is represented by the expression (8x+23)°
The value of x in the regular octagon is 14°. The solution has been obtained by using arithmetic operations.
What are arithmetic operations?
All real numbers are claimed to be able to be described by the four basic operations, sometimes known as "arithmetic operations". Quotient, product, sum, and difference are the next four mathematical operations after division, multiplication, addition, and subtraction.
We are given that the measure of each angle is (8x + 23)°.
We know that the sum of angles of an octagon is 1080°.
So, using the arithmetic operation, we get
⇒ 8 * (8x + 23)° = 1080°
⇒ 64x + 184 = 1080°
⇒ 64x = 896°
⇒ x = 14°
Hence, the value of x in the regular octagon is 14°.
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Number of Downloads by Quarter In the 3rd quarter, approximately how many more downioads were there of Starship than Flurry? 1.5 million 1.75 milion 2 million 2.25 miltion
The number of downloads of Starship than Flurry include the following: A. 1.5 million.
What is a line plot?In Mathematics and Statistics, a line plot can be defined as a type of graph that is used to graphically represent a data set above a number line, while using crosses, dots, or any other mathematical symbol.
Based on the data and information provided in the line plot shown in the image attached below, we can logically deduce the following parameters and key features:
Red line represent Starship.Purple line represent Flurry.At 3rd quarter, Starship = 3 million downloads.At 3rd quarter, Flurry = 1.5 million downloads.Next, we would calculate the difference between the downloads in the 3rd quarter for Starship and Flurry as follows;
Difference = 3 million downloads - 1.5 million downloads.
Difference = 1.5 million downloads.
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The length of a rectangle is 5 yd less than three times the width, and the area of the rectangle is 50 yd'. Find the dimensions of the rectangle.
Length: yd
Width: yd
The length and width of the rectangle are 10 yards and 5 yards
How to find the length and width of the rectangle.From the question, we have the following parameters that can be used in our computation:
The length of a rectangle is 5 yd less than three times the width
This means that
Length = 3x - 5
Width = x
So, we have
Area = (3x - 5)* x
Substitute the known values in the above equation, so, we have the following representation
(3x - 5)* x = 50
Using a graphing tool, we have
x = 5
So, we have
Length = 3 * 5 - 5
Width = 5
Evaluate
Length = 10
Width = 5
Hence, the length is 10 yards
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suppose you are in charge of a company that rents moving vans to customers. Each van costs $18,000, and you spend an average of $35 per rental day on maintenance costs. You rent the van for $59.99 per day. How could you set up a system of equations to find where your company "breaks even?" On average, how many days must one van be rented before the company makes any profit
The answer will be as follows after answering the supplied question After equation reaching the break-even threshold, the firm will begin to profit.
What is equation?A math equation is a process that relates two statements by using the equals sign (=) to indicate equivalence. In algebra, an equation is a mathematical statement that shows the equivalence of two mathematical expressions. In the equation 3x + 5 = 14, for example, the equal sign separates the numbers 3x + 5 and 14. A mathematical formula may be used to understand the link between the two phrases written on opposite sides of a letter. Frequently, the logo and the software are the same. For example, 2x - 4 = 2.
Rental rate per day x number of rental days Equals total revenue
Total revenue = $59.99 multiplied by
Total cost = vehicle cost + daily maintenance cost * number of rental days
Total expenditure = $18,000 + $35x
We can now put these two equations equal to determine the break-even point:
$59.99x = $18,000 + $35x
When we solve for x, we get:
$24.99x = $18,000
x = 720.29
We round up to 721 days since we can't rent a vehicle for a fractional amount of days.
As a result, in order to break even, the corporation needs rent a vehicle for at least 721 days.
After reaching the break-even threshold, the firm will begin to profit.
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Suppose tan(b) = –2, and the terminal side of b is located in quadrant II. What is cot(b)
a. ) –2
b. ) Negative one-half
c. ) one-half
d. )2
Answer:
b) Negative one-half
Step-by-step explanation:
according to the equation:
[tex]\tan(b)=-2\\\therefore b=\tan^1(-2})\\b=-63.44^\circ[/tex]
This value is located in the IV quadrant, however we can add 180 degrees and still remain the same value
[tex]b \equiv -63.44+180\\b \equiv 116.56^\circ[/tex]
Now, "b" is located in the II quadrant, so:
[tex]cot(116.56)= ?[/tex]
I guess you want to get the result with calculator, so we will use an identity to be able to enter this value into the calculator.
[tex]cot(116.56)= \frac{1}{tan(116.56)} \approx -0.5[/tex]
Therefore, we have found the solution to the exercise.
[tex]\text{-B$\mathfrak{randon}$VN}[/tex]
As given on the STEPS Engineers Ireland website ( Engineers Week, Secondary School section) how many free engineering activities are available to download by teachers for classroom use?
a company has two large computers. the slower computer can send all the companys email in 30 minutes. the faster computer can complete the same job in 20 minutes. if both computers work together, how long will it take them to do the same job?
If both computers work together it will take them 12 minutes to do the same job.
We will be using the given formula :
Time = (W) / (V1 + V2), where W is the amount of work to be done, and V1 and V2 are the efficiencies of two workers.
Let the amount of work to be done be 1 (all the email sent).
The efficiency of the slower computer is 1/30.
The efficiency of the faster computer is 1/20.
When both computers work together, the efficiency of the slower computer and the efficiency of the faster computer are added, so their efficiency is 1/30 + 1/20 = 1/12.
Substituting the values in the formula, we have :
Time = (W) / (V1 + V2)
Time = (1 ) / (1/30 + 1/20)
Time = (1) / 1/12
Time = 12 minutes
Therefore, if both computers work together, it will take them 12 minutes to do the same job.
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2. If twice a number is decreased by 13, the result is 9. What is the number?
Answer:
Let's start by translating the sentence into an equation using algebra.
Let's say the number is represented by "x".
According to the problem:
"Twice a number" can be written as "2x".
"If twice a number is decreased by 13" can be written as "2x - 13".
"The result is 9" can be written as "= 9".
Putting it all together, we get the equation:
2x - 13 = 9
Now we can solve for x:
2x = 22
x = 11
Therefore, the number is 11.
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Determine whether statement (3) follows from statements (1) and (2) by the Law of Detachment or the Law of Syllogism. If it does, state which law was used. If it does not, write invalid.
(1) If you use a pencil you can erase mistakes.
(2) If you can erase mistakes your paper will be neater.
(3) If you use a pencil your paper will be neater.
A. Invalid
B. Yes; Law of Detachment
C. Yes; Law of Syllogism
Statement (3) follows from statements (1) and (2) by the Law of Syllogism. So, the correct option c) which is Yes; Law of Syllogism
Here's the reasoning:
(1) If you use a pencil you can erase mistakes.
(2) If you can erase mistakes your paper will be neater.
Therefore, by the Law of Syllogism,
(3) If you use a pencil your paper will be neater.
The Law of Syllogism states that if we have two conditional statements (if A then B) and (if B then C), we can logically conclude a third conditional statement (if A then C). That's exactly what we've done here since statement (1) is the first conditional statement, statement (2) is the second conditional statement, and statement (3) is the conclusion that follows from applying the Law of Syllogism to the first two statements.
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Jaqi owes Katie$60and pays$35toward her debt. a. What percent of the debt has she paid? b. What percent is still owed? c. What is her debt now? d. If Jaqi pays Katie another$10toward her new debt, what pereent of her new debt is paid off?
a. Jaqi has paid 58.33% οf her debt.
b. Jaqi still οwes 41.67% οf her debt.
c. Jaqi's debt nοw is $25.
d. Jaqi wοuld have paid οff 40% οf her new debt.
What is a percentage?Percentage can be calculated by dividing the value by the tοtal value, and then multiplying the result by 100.
a. Tο find the percentage οf the debt that Jaqi has paid, we need tο divide the amοunt paid by the tοtal amοunt οwed and multiply by 100:
Percentage paid = (Amοunt paid / Tοtal amοunt οwed) x 100%
Percentage paid = (35 / 60) x 100%
Percentage paid = 58.33%
Sο Jaqi has paid 58.33% οf her debt.
b. Tο find the percentage still οwed, we can subtract the amοunt paid frοm the tοtal amοunt οwed, and then calculate the percentage:
Percentage still οwed = (Amοunt still οwed / Tοtal amοunt οwed) x 100%
Percentage still οwed = ((60 - 35) / 60) x 100%
Percentage still οwed = 41.67%
Sο Jaqi still οwes 41.67% οf her debt.
c. Tο find Jaqi's debt nοw, we simply subtract the amοunt paid frοm the οriginal debt:
Debt nοw = Tοtal amοunt οwed - Amοunt paid
Debt nοw = 60 - 35
Debt nοw = $25
Sο Jaqi's debt nοw is $25.
d. If Jaqi pays anοther $10 tοward her new debt οf $25, we can find the percentage paid as fοllοws:
Percentage paid = (Amοunt paid / Tοtal amοunt οwed) x 100%
Percentage paid = (10 / 25) x 100%
Percentage paid = 40%
Sο Jaqi wοuld have paid οff 40% οf her new debt.
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A rectangular swimming pool is bordered by a concrete patio. The width of the patio is the same on every side. The area of the surface of the pool is equal to the area of the patio. What is the width of the patio?
Length times width = area of a rectangle.
16ft×24ft= 384
Area of the patio since all sides are equal to
4
width×width×width×width= 384
Answer=4.4267276788
represent 1:50000 in 2 different method
The answer of the question based on the representing the value in two different methods are given below;
What is Distance?Distance refers to amount of space between the two objects or points in the space. It is measure of length of path traveled by object or person from one point to the another.
Distance can be measured in various units like meters, kilometers, feet, miles, etc. It is fundamental concept in a geometry and is used in a various areas of science, engineering, and everyday life.
1:50000 can be represented in two different ways as follows:
Ratio: The expression "1:50000" represents the ratio of one unit on a map to 50,000 units on the ground. This means that one unit of distance on the map corresponds to 50,000 units of distance on the ground. For example, if one unit on the map represents one meter, then 50,000 meters (or 50 kilometers) on the ground would be represented by one unit on the map.Decimal: 1:50000 can also be represented in decimal form as 0.00002. This is obtained by dividing 1 by 50,000, which gives the proportion of one unit on the map to the corresponding distance on the ground. This can be useful for calculations that involve scaling or converting distances between map and ground measurements.TO know more about Ratio visit:
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10 Li + Hd₂O5 -> 5 Li₂O + 2 Hd + Energy
What simple reaction type is this (5 points)?
What specific reaction type is this (5 points)?
What device can we use to measure the amount of energy released (5 points)?
This is a single displacement reaction. Specifically, this is a metal displacement reaction. We can use a calorimeter to measure the amount of energy released.
Describe Reaction?A reaction, in chemistry, is a process in which two or more substances (reactants) interact with each other to form new substances (products). Reactions involve the breaking and forming of chemical bonds between atoms or molecules, which results in the rearrangement of atoms into new chemical compounds.
Reactions can be classified into several different types, depending on the nature of the reactants and products, the conditions under which the reaction occurs, and the rate of the reaction. Some common types of reactions include:
Combination (or synthesis) reactions, in which two or more substances combine to form a single product.
Decomposition reactions, in which a single substance breaks down into two or more simpler substances.
Single replacement (or displacement) reactions, in which one element replaces another element in a compound.
Double replacement (or metathesis) reactions, in which two compounds exchange ions to form two new compounds.
Acid-base reactions, in which an acid reacts with a base to form a salt and water.
Redox (or oxidation-reduction) reactions, in which electrons are transferred between reactants.
This is a single displacement reaction.
Specifically, this is a metal displacement reaction.
We can use a calorimeter to measure the amount of energy released.
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The given chemical equation represents a single displacement reaction and a calorimeter can be used to measure the amount of energy released during the reaction.
The given chemical equation represents a single displacement reaction. This is because one element (Li) displaces another element (H) in a compound (Hd₂O5) to form a new compound (Li₂O) and free element (Hd) along with the release of energy.
To measure the amount of energy released during the reaction, we can use a calorimeter. A calorimeter is a device that measures the heat change in a chemical reaction.
It consists of an insulated container that holds the reactants and a thermometer to measure the temperature change.
The heat released or absorbed during the reaction causes a change in temperature, which can be measured and used to calculate the energy released or absorbed by the reaction.
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The order of 105cm 1m 150mm from biggest to smallest
The order of the given numbers with different units of length from biggest to smallest is given by 105cm > 1m > 150mm.
Measurement with different units are,
105cm
1m
150mm
To arrange these measurements in order from biggest to smallest,
Convert all the measurements in the same units.
Convert all of them to meters,
1 meter = 100 centimeter
To convert centimeter to meter divide it by 100 we get,
105 cm
= 105 / 100 m
= 1.05 m
And 1 m = 1 m
1 meter = 100 centimeter
1 centimeter = 10millimeter
⇒ 1meter = 1000 millimeter
To convert millimeter to meter divide it by 1000 we get,
150 mm
= 150 / 1000 m
= 0.15 m
Now, arrange them in order from biggest to smallest we get,
1.05 m, 1 m, 0.15 m
1.05 m > 1 m > 0.15 m
⇒ 105cm > 1m > 150mm
Therefore, the order of the given numbers from biggest to smallest is equal to 105cm > 1m > 150mm.
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i can’t figure this out out!! extra points
Step-by-step explanation:
as I just explained in your other posting of the same question :
y = cos(30) × 8 = sqrt(3)/2 × 8 = 4×sqrt(3).
so, the number in the green box is 4.
Which of these vectors can be written as a linear combination of vector[-6,-4,7,1] and [-4,-3,2,-1]?
in vector D [-2,1,3,0], we can multiply [-6,-4,7,1] by -2 and [-4,-3,2,-1] by 1 and add the two results together to obtain [-2,1,3,0]. This means that vector D can be written as a linear combination of vector [-6,-4,7,1] and [-4,-3,2,-1], making it the correct answer.
We can use the concept of linear combinations to answer this question. A linear combination of two vectors is a vector that can be written as the sum of two or more vectors. To solve this problem, we need to express the four given vectors as a linear combination of vector [-6,-4,7,1] and [-4,-3,2,-1]. We can do this by multiplying each vector element by a scalar and then adding them together. For example, in vector D [-2,1,3,0], we can multiply [-6,-4,7,1] by -2 and [-4,-3,2,-1] by 1 and add the two results together to obtain [-2,1,3,0]. This means that vector D can be written as a linear combination of vector [-6,-4,7,1] and [-4,-3,2,-1], making it the correct answer.
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In an obstacle course, participants climb to the top of a tower and use a zip line to travel across a mud pit. The zip line extends from the top of a tower to a point on the ground 48. 2 feet away from the base of the tower. The angle of elevation of the zip line is 33°. Estimate the length of the zip line to the nearest tenth of a foot
The estimated length of the zip line is 62.8 feet.
The length of a zip line can be estimated using the formula for the length of a side of a right triangle, which is the square root of the sum of the squares of the two shorter sides. In the case of the obstacle course, the two shorter sides are the height of the tower and the horizontal distance from the base of the tower to the point on the ground.
To calculate the length of the zip line, we first need to calculate the height of the tower. The angle of elevation of the zip line is 33°, so we can use trigonometry and the Law of Sines to calculate the height of the tower. The Law of Sines states that the ratio of the length of a side to the sine of its opposite angle is the same for all sides of the triangle. Since we know the angle of elevation (33°) and the horizontal distance (48.2 feet), we can calculate the height of the tower using the formula:
h = (48.2 * sin(33°)) / sin(90°)
h = 42.7 feet
Now we can calculate the length of the zip line using the formula for the length of a side of a right triangle:
[tex]L = sqrt(h^2 + d^2)L = sqrt(42.7^2 + 48.2^2)L = 62.8 feet[/tex]
Rounding to the nearest tenth of a foot, the length of the zip line is 62.8 feet.
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The external radius of hollow right circular cylindrical pipe is 9cm and it's length is 14 cm. If the volume of metal used make the pipe is 748cm^3then find thickness of metal
The thickness of a hollow cylinder which is also the thickness of the metal is 1cm
How to calculate the Thickness of a hollow cylinder.To calculate the thickness of a hollow cylinder, subtract the inner and outer cylinder radii, r and R:
the thickness of the solid is:t = R - r
And if we are working with the diameter, we subtract the diameters and divide by 2VH = π × h(D² - d²)/4
where
Vh = Volume of hollow cylinder = 748cm
h = height of cylinder = 14cm
D = external diameter = 9 x 2 = 18cm
d = internal diameter = ??
The above statements can then be represented as:
4 x 748 = 22/7 x 14 (18² - d²)
Evaluate the products, quotients and exponents
68 = 324 - d²
So, we have
d² = 256
Take the square roots
d = 16 cm
From here we can get the thickness by subtracting the external and internal diameter and dividing by 2
thickness = (18 - 16)/2
thickness = 2/2
thickness = 1cm
So, the thickness is 1 cm
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