Answer: If adding predictor variables to a regression model never reduces r2, you can include all the available predictor variables in the model, as long as they have a significant correlation with the dependent variable. However, having too many variables in a model may lead to overfitting, resulting in poor model generalization. In addition, some predictor variables may not be useful, while others may be collinear. As a result, it is usually recommended to use a stepwise regression method, which selects the best subset of predictor variables that improve the model's performance, without including irrelevant or collinear variables.r2 adj: R2 adj is the adjusted R2 value of a regression model. R2 adj is a statistical measure of how well the regression model fits the observed data. It is similar to the R2 value, but takes into account the number of predictor variables in the model, in addition to the sample size. The adjusted R2 value increases when a new predictor variable improves the model's fit, but decreases when the new predictor variable does not improve the model's fit or is collinear with other predictor variables.
The adjusted R2 value ranges from 0 to 1, with higher values indicating better model fit.
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a social media company claims that over 1 million people log onto their app daily. to test this claim, you record the number of people who log onto the app for 65 days. the mean number of people to log in and use the social media app was discovered to be 998,946 users a day, with a standard deviation of 23,876.23. test the hypothesis using a 1% level of significance.
Answer: The correct answer is "Fail to reject the null hypothesis. There is not enough evidence to oppose the company's claim."
Step-by-step explanation:
I took the test
Write an expression that represents the difference between the fat in a cookie from the new recipe and the target fat content
The expression represents the constraint that the amount of fat in the cookie should not deviate from the target fat content by more than 1.8 grams per cookie is |f - 5| ≤ 1.8
To express the difference between the fat in a cookie from the new recipe and the target fat content, we can use an expression. Let's represent the amount of fat in a cookie from the new recipe as f. Then, the difference between the fat in the cookie and the target fat content of 5 grams per cookie can be expressed as:
|f - 5|
The vertical bars around the expression indicate the absolute value, which means that we want the difference to be positive, regardless of whether f is greater or less than 5.
Now, we also know that the company will accept a difference of up to 1.8 grams per cookie. This means that the expression above should be less than or equal to 1.8:
|f - 5| ≤ 1.8
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Complete Question:
The Billing sly Cookie Company is experimenting with a new low-fat cookie recipe. The management wants the bakers to come up with a cookie that is low in fat but still has good taste. The company decides on a target fat content of 5 grams per cookie. In order to be labeled low-fat, a difference of 1.8 grams per cookie is acceptable. This means the amount of fat should be no more than 1.8 grams above 5 or no more than 1.8 grams below 5.
Write an expression that represents the difference between the fat in a cookie from the new recipe and the target fat content. Use f to represent the amount of fat in a cookie from the new recipe.
try to add all categorical variables to create a linear regression model. which variable cannot be added (not allowed by the software) and why is that?
There are a few different reasons why certain categorical variables may not be allowed in a linear regression model:
Some software packages require categorical variables to be converted to numerical variables before they can be included in a linear regression model. This is typically done using one-hot encoding, where each category is represented by a binary variable indicating whether or not it is present.
If the number of categories for a given variable is very large, this can create a very large number of new variables, which may exceed the capacity of the software or the memory available on the computer running the analysis.
Some software packages may not allow categorical variables with a very large number of categories, again because of the potential computational demands of encoding these variables as binary variables.
If a categorical variable has a large number of categories relative to the sample size, it may not be possible to estimate the coefficients for each category with enough precision to be useful. Some software packages may not allow categorical variables with missing values, unless those missing values are explicitly coded as a category.
Overall, the decision to include or exclude categorical variables from a linear regression model will depend on a variety of factors, including the number of categories, the software being used, the size of the dataset, and the research question being addressed.
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if the explained sum of squares is 35 and the total sum of squares is 49, what is the residual sum of squares?
If the explained sum of squares is 35 and the total sum of squares is 49, then the residual sum of squares is 14.
The total sum of squares is a measure of the total variability in a dataset. It is the sum of the squared differences between the mean of the dataset and each individual data point. The explained sum of squares is the sum of the squared differences between the predicted value of a regression line and the mean of the dataset.
The residual sum of squares is the sum of the squared differences between the predicted value of the regression line and the actual data points. It is the amount of variability in a dataset that is not explained by the regression line.To calculate the residual sum of squares for the given example, we start with the total sum of squares.
The total sum of squares is the sum of the squared differences between the mean of the dataset and each individual data point. The mean of the dataset is calculated by summing all the values and then dividing by the number of data points.
The total sum of squares is then the sum of the squared differences between the mean of the dataset and each individual data point. For the given example, the total sum of squares is 49.
The explained sum of squares is the sum of the squared differences between the predicted value of the regression line and the mean of the dataset. The predicted value of the regression line can be found using the regression equation. The explained sum of squares for the given example is 35.
The RSS is then the difference between the TSS and the explained sum of squares. For the given example, the RSS is 49 - 35 = 14.
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The annual rainfall for Austin, Texas, and San Antonio, Texas, in each of the years from 2002 to 2011 are shown in the tables. Use the data for 9-it.' Annual Rainfall for Austin, Texas (in.) 36.00 21.41 52.27 22.33 34.70 46.95 16.07 31.38 37.76 19,68 Annual Rainfall for San Antonio, Texas (in.) 46.27 28,45 45.32 16.54 21.34 47.25 13.76 30.69 37.39 1759 9. Use a spreadsheet to find the mean for the two cities' annual rainfalls. In which city does it rain more in a year, on average?
In San Antonio, Texas it rain more in a year, on average when compared to Austin, Texas according to the mean of both cities.
Data of Austin, Texas is as follows:
36.00, 21.41, 52.27, 22.33, 34.70, 46.95, 16.07, 31.38, 37.76 and 19.68.
Number of values ( n ) = 10
Sum of the values = 318.23
Average of the rainfall in Austin, Texas is equal to:
Mean = Total sum / No. of Values
Mean = 318.23 / 10
Mean = 31.82 in
Data of San Antonio, Texas is as follows:
46.27, 28.45, 45.32, 16.54, 21.34, 47.25, 13.76, 30.69, 37.39 and 17.59.
Number of values ( n ) = 10
Sum of the values = 304.6
Average of the rainfall in San Antonio, Texas is equal to:
Mean = Total sum / No. of Values
Mean = 304.6 / 10
Mean = 30.46 in
So, comparatively the average of San Antonio is higher.
Therefore in San Antonio, Texas it rain more in a year, on average when compared to Austin, Texas.
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correct the equation 3^4 x 2^3 = 6^4+3 to what it should be, and explain it.
Answer:
The equation 3^4 x 2^3 = 6^4+3 is incorrect.
To evaluate the left side of the equation, we first simplify each term using exponent rules:
3^4 = 3 x 3 x 3 x 3 = 81
2^3 = 2 x 2 x 2 = 8
So 3^4 x 2^3 = 81 x 8 = 648
To evaluate the right side of the equation, we simplify the exponent first:
6^4+3 = 6^4 x 6^3 = 1296 x 216 = 279936
Therefore, the corrected equation should be:
3^4 x 2^3 = 648 = 6^4 - 288
Notice that 6^4 - 288 is equal to the original value of 279936, but the equation has been written correctly by moving the 3 to the other side of the equation and changing the operation from addition to subtraction.
HELP ASAP ON TIME LIMIT 50 PNTS
Answer:
A:1,142 miles.
B; 187.30
C; 4
WILL MAKE U BRAINLIST! HELPS PLS AND SHOW ALL STEPS
Answer:
................
Step-by-step explanation:
.................
if my grade is 88 but i have a test that counts for 25 percent of my total grade and i get an 80 what will my grade be
If your grade is 88 but you have a test that counts for 25 percent of your total grade and you get an 80, your grade will be 86.
Test scores are an essential aspect of an educational system. Teachers use them to evaluate how well students have grasped concepts or learned material from a class or course. They help in establishing the academic strength and weaknesses of the student.
The test score you got is 80, which makes 25% of the total grade you can have for this course. This means that 0.25*80 = 20 marks will be added to your final grade. Your previous grade was 88, which will not be counted with the test marks.
Hence the marks you will have for the final grade will be 88 + 20 = 108. Divide this number by 1.25 (as 25% is equivalent to 0.25), which results in 86.4. You can round it off to the nearest integer, which is 86.
Therefore, your final grade will be 86.
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3. Mr. Mohan donated 8 five-litre bottles of water for the school's annual walkathon. There are two
water stops during the walkathon. Cups, each containing 125 ml of water, are filled from the five-
litre bottles. Each of the 200 participants takes one cup of water at each water stop. How many
participants will not get two cups of water if Mr. Mohan is the only person who donated water?
The number of participants that will not get two cups of water if Mr. Mohan is the only person that donated water, obtained using basic arithmetic operations are 40 participants
What are basic arithmetic operations?Basic arithmetic operations includes addition, subtraction, division and multiplication.
Mr. Mohan donated 8 five-litre bottles of water, which is equivalent to 40 litres of water;
8 × 5 litres = 40 litres
Each cup contains 125 ml of water which means that each liter can fill 8 cups. So the total number of cups that can be filled from the 8 five-litre bottles of water containing 40 litres of water is; 40 × 8 = 320 cups
Since each participant takes one cup at each stop and there are two stops in total, each participant will take a total of 2 cups during the walkation. This means that only 160 participants will get two cups of water if Mr Mohan is the only person who donated water.
So, 200 - 160 = '40 participants' will not get two cups of water if Mr. Mohan is the only person who donated water.
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a random variable x is uniformly distributed between 45 and 150. what is the probability of xbegin mathsize 12px style less or equal than end style60?
The probability of x being exactly 48 when it is uniformly distributed between 45 and 150 is 1/105
Since x is uniformly distributed between 45 and 150, the probability of x taking any particular value in this range is the same. Let this probability be denoted by P(x).
To find P(x = 48), we need to first check if 48 lies within the range of values that x can take. In this case, 48 lies within the range of 45 and 150, so it is a possible value for x.
Since the distribution is uniform, the probability of x taking any particular value between 45 and 150 is given by
P(x) = 1 / (150 - 45) = 1 / 105
Therefore, the probability of x being exactly 48 is
P(x = 48) = 1 / 105
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The given question is incomplete, the complete question is:
A random variable x is uniformly distributed between 45 and 150. what is the probability of x = 48?
Find the critical t-value that corresponds to 90% confidence. Assume 16 degrees of freedom. (Round to three decimal places as needed.)
1.746 is the critical t value that corresponds to 90% confidence.
To find the critical t-value that corresponds to 90% confidence with 16 degrees of freedom, follow these steps:
1. Determine the desired confidence level: 90%
2. Calculate the corresponding significance level (alpha) by subtracting the confidence level from 100%: 100% - 90% = 10%
3. Divide the significance level by 2 to get the value for a two-tailed test: 10% / 2 = 5%
4. Look up the critical t-value in a t-distribution table using the degrees of freedom (16) and the 5% value.
From the t-distribution table, the critical t-value for 16 degrees of freedom and 90% confidence is approximately 1.746.
So, the CRITICAL T VALUE that corresponds to a 90% CONFIDENCE level with 16 DEGREES FREEDOM is 1.746, rounded to three decimal places.
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Isla will deposit $800 in an account that earns 5% simple interest every year. Her sister Aven will deposit $750 in an account that earns 7% interest compounded annually. The deposits will be made on the same day, and no additional money will be deposited or withdrawn from the accounts. Which statement is true about the balances of the girls’ accounts at the end of 48 months?
To compare the balances of the two accounts, we need to calculate the future value of each account after 48 months.
For Isla's account with simple interest, the interest earned every year is:
$800 x 0.05 = $40
After 48 months (4 years), the interest earned is:
$40 x 4 = $160
So the balance of Isla's account after 48 months is:
$800 + $160 = $960
For Aven's account with compound interest, we can use the formula:
A = P(1 + r/n)^(nt)
where A is the future value, P is the principal (initial deposit), r is the annual interest rate (as a decimal), n is the number of times the interest is compounded per year, and t is the time in years.
For Aven's account, P = $750, r = 0.07, n = 1 (compounded annually), and t = 4. Plugging these values into the formula, we get:
A = $750(1 + 0.07/1)^(1 x 4) = $1039.14
Therefore, the statement "Aven's account will have a higher balance than Isla's account at the end of 48 months" is true.
Sheldon harvests the strawberries and the tomatoes in his garden. He picks 1 1/5 kg less strawberries in the morning than in the afternoon. If Sheldon picks 2 1/3 kg in the morning, how many kilograms of strawberries does he pick in the afternoon? Explain your answer using words, pictures, or equations.
Answer:
[tex]\frac{32}{15}[/tex]
Step-by-step explanation:
afternoon=[tex]\frac{21}{3}[/tex] +[tex]\frac{11}{5}[/tex]
L.C.M=15
[tex]\frac{21+11}{15}[/tex]
[tex]\frac{32}{15}[/tex]
the spirit club buys shirts in bulk for $8 each. they mark up the shirts 25% to sell in the school store. at the end of the year, they sell the shirts for 25% off. how much profit does the spirit club make on each shirt sold at the end of the year?
Answer:
The cost price of each shirt is $8.
They mark up the shirts 25%, which means they increase the price by (25/100) * $8 = $2.
So, the selling price of each shirt becomes $8 + $2 = $10.
At the end of the year, they sell the shirts for 25% off, which means they reduce the price by (25/100) * $10 = $2.50.
Therefore, the selling price of each shirt after the discount becomes $10 - $2.50 = $7.50.
The profit made on each shirt sold at the end of the year is the difference between the selling price and the cost price, which is $7.50 - $8 = -$0.50.
Since the profit is negative, it means that the Spirit Club is making a loss of $0.50 on each shirt sold at the end of the year.
mrs. stevens is an inpatient in your hospital. her prescriber just ordered hydroxyzine 10 mg every 8 hours. how many tablets of hydroxyzine 10 mg will you put in mrs. stevens' med cart drawer for a 24-hour fill?
We will need to place three tablets of hydroxyzine 10 mg in Mrs. Stevens' med cart drawer for a 24-hour supply because her prescriber has instructed her to take it every eight hours.
Mrs. Stevens will need to take 10 mg of hydroxyzine three times per day (every eight hours) to comply with the prescription. We will need to figure out how many tablets of hydroxyzine 10 mg she will need for those three daily doses because we need to fill the drawer for 24 hours.
We will require a total of 30 mg per day for three doses, each of which contains 10 mg. Since we are filling it for 24 hours, that means we will need
30 mg x 3 doses = 90 mgfor the entire day. There are 10 mg of hydroxyzine in each tablet., therefore,
90 mg / 10 mg per tablet = 9 tablets of hydroxyzine.However, as we are only using the drawer for three doses, we will require three 10 mg hydroxyzine tablets.
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Juan spent 10 minutes on his history homework and 3 minutes per question on his math homework. Which graph shows the total homework time, t, related to the number of math questions, q?
Discrete graph on a coordinate plane shows number of math questions, numbered 1 to 8 along the horizontal axis, and total homework time, numbered 5 to 40, on the vertical axis. Solid circles appear at points (0, 10), (1, 13), (2, 15), (3, 19), (4, 22), (5, 25), (6, 29), (7, 32), (8, 34).
Continuous graph on a coordinate plane shows number of math questions, numbered 1 to 8 along the horizontal axis, and total homework time, numbered 5 to 40, on the vertical axis. Solid circles appear at points (0, 10), (1, 13), (2, 15), (3, 19), (4, 22), (5, 25), (6, 29), (7, 32), (8, 34).
Discrete graph on a coordinate plane shows number of math questions, numbered 1 to 8 along the horizontal axis, and total homework time, numbered 3 to 24, on the vertical axis. Solid circles appear at points (0, 0), (1, 3), (2, 6), (3, 9), (4, 12), (5, 15), (6, 18), (7, 21), (8, 24).
Answer:Graph attached below. : Given : Juan spent 10 minutes on his history homework and 3 minutes per question on his math homeworkWe have to plot the graph that shows the total homework time, t, related to the number of math questions, q.Since, t denotes the total homework time taken by Juanand q denotes the number of math questions done by JuanThen we can represent the situation using a linear equation.Since he spent 10 minutes on his history homework and 3 minutes per question on his math homework.Then q questions take 3q timeand 10 minutes are fixed so, Total time is given by equation t = 10 + 3qAnd graph for the equation is attached below.
Step-by-step explanation:
Answer: Its A (the one all the way to the left)
explanation: Just guessed
past data suggest that the score increase has astandard deviation of about 50 points. how large a sample of high school students would be needed to estimate the mean change in sat score to within 2 points with 95% confidence
382 students
To estimate the mean change in SAT scores to within 2 points with 95% confidence, you would need a sample of at least 382 high school students. This is because the margin of error (2 points) must be smaller than the standard deviation (50 points). Thus, we use the formula margin of error = (z-score) x (standard deviation/√n), where n is the sample size, to calculate the required sample size. Solving for n yields 382 students.
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The ratio of ounces to pounds is 16:1. A veterinarian is treating a dog that weighs 46 pounds. To calculate the correct amount of medicine, the vet must convert the dog's weight
ounces. Which ratio shows the conversion to ounces?
The correct option is c: 46lb x (16 oz / 1lb). Thus, amount of medicine given for the weight of dog in ounce is 736 ounce.
Explain about the unit conversion?The same attribute is expressed using a unit conversion, but in a different measurement unit. For example say, time can be mentioned in minutes rather than hours, and distance can be expressed in kilometres, feet, or any other measurement unit instead of miles.
Measurements are frequently offered in one set of measurements, like feet, but are required in another set, like chains. A conversion factor is a mathematical equation that facilitates an equal exchange of feet for chains.
Given data:
ratio of ounces to pounds = 16:1
16 ounce / 1 pound
Let the weight of dog in ounce be 'x'.
weight of dog in pounds = 46 pounds.
ratio : x ounce / 46 pounds
Equating both ratios:
16 ounce / 1 pound = x ounce / 46 pounds
Cross multiplying:
x = 16*46 ounce
x = 736 ounce
The correct option is c: 46lb x (16 oz / 1lb)
Thus, amount of medicine given for the weight of dog in ounce is 736 ounce.
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Complete question is-
The ratio of ounces to pounds is 16:1. A veterinarian is treating a dog that weighs 46 pounds. To calculate the correct amount of medicine, the vet must convert the dog's weight
ounces. Which ratio shows the conversion to ounces?
The full question is attached.
1 point question at position 8 a stockout occurs when customer orders for a product exceed the amount of inventory kept on hand. suppose specialty toys management decides to order 15,000 units. using the demand distribution calculated earlier, what is the probability of a stockout? use 4 decimal places.
The probability using the demand distribution of a stockout is given as 0.6293.
a. profit if 15000 units are sold $120,000b. if there is demand for 15,000 units but orders only 18000 units profit is $87,000c. if there is demand for 18,000 units but orders only 24000 units profit is $78,000.Out-of-stock situations, commonly referred to as stockouts, occur when a company runs out of a product that a client is prepared to purchase. Stockouts have a direct influence on customer satisfaction and are a major reason for bad reviews, additional expenses, and lost revenue or, worse, customers.
Let X = no of demand for the toy
μ =20,000
P(10000 < X < 30000) = 0.90
X follows normal distribution
z=x−μ/σ
P(10000 < X < 30000)=0.90
P((10000−20000)/σ) < (x−20000)/σ < (30000−20000)/σ )=0.90
as probability is 0.90, the z-score =1.645.
(30000−20000)/σ =1.645
10000/σ=1.645
σ=10000/1.645
σ=6079
1.P(X>15,000)
=P(Z> (15000−20000)/6079)
=P(Z> −0.82)
=P(Z< 0.82)
=0.5+0.1293
=0.6293
2. P(X> 24000)
=P(Z> (24000−20000)/6079)
=P(Z> 0.66)
=0.5−0.2454
=0.2546
3.Expected profit = (profit per unit )*(no of sold units) + (loss per unit )*(of units unsold)
profit = $8
loss = -$11
a. profit if 15000 units are sold =(8)(15000) + (-11)(0) = $120,000
b. if there is demand for 15,000 units but orders only 18000 units profit is (8)(15000) + (-11)(3000) = $87,000
c. if there is demand for 18,000 units but orders only 24000 units profit is (8)(18000)+(-11)(6000)= $78,000.
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Complete question:
(a) What is the expected profit if all 15,000 units are sold? type your answer...
(b) Suppose there is demand for 15,000 units, but Specialty Toys orders 18,000 units? What is the expected profit? type your answer...
(c) Suppose there is demand for 18,000 units, but Specialty Toys orders 24,000 units? What is the expected profit? type your answer... 15 3 points Based on what you know about the distribution of demand, the probability of stock-outs, and the expected profit, how many units of Weather Teddy do you recommend that Specialty Toys purchase?
What are the coordinates of the vertices of the figure after a reflection across y=2:
G (-3,3), H (-2,5), I (1,1)
Answer:
G (-3,-1)
H (-2,-3)
I (1,1)
Step-by-step explanation:
After a reflection across y=2, the y-coordinates of the vertices will change sign while the x-coordinates remain the same. Thus, the new coordinates of the vertices will be:
G (-3,-1)
H (-2,-3)
I (1,1)
Answer:
G (3,3) , H (2,5), I (-1,1)
Step-by-step explanation:
Since it’s flipped over the Y-Axis, the X-Axis numbers remain the same.
WRONG!!
didnt read the question correctly, so the vertices are incorrect lol.
For what values of a are the following expressions true?
(PLease help ASAP)
|a +5| = −5−a
|a +5 |=a +5
The equation |a + 5| = −5 − a is not true for any value of a, while the equation |a + 5| = a + 5 is true for values of a greater than or equal to -5.
The absolute value of a number is defined as the distance of the number from zero on a number line. Thus, |a + 5| is equal to the distance of (a + 5) from zero on a number line. Since distance is always non-negative, |a + 5| is always non-negative.
On the other hand, the expression −5 − a is always negative, since the sum of a negative number (-5) and any number (a) is always negative.
Therefore, for the equation |a + 5| = −5 − a to be true, the absolute value of (a + 5) would have to be negative, which is impossible since absolute value is always non-negative.
For the equation |a + 5| = a + 5 to be true, a must be greater than or equal to -5, because when a is greater than or equal to -5, (a + 5) is already non-negative, so the absolute value of (a + 5) is equal to (a + 5).
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a wooden artifact from an ancient tomb contains 70% of the carbon-14 that is present in living trees. how long ago was the artifact made?
The artifact was made about 3102.5 years ago.
An artifact from an ancient tomb contains 70% of the carbon-14 that is present in living trees, how long ago was the artifact made?
Carbon dating is used to estimate the age of organic materials, and it is used to determine the age of an artifact in this situation. The method used to estimate the age of an artifact based on its carbon-14 content is known as carbon dating. Carbon-14 has a half-life of 5,730 years. As a result, the amount of carbon-14 present in an object can be used to determine how long it has been since the object was last in contact with the atmosphere, and therefore how long it has been since it was alive.
Let C0 be the amount of carbon-14 present in living trees and C1 be the amount of carbon-14 present in the wooden artifact. After 5,730 years, C1 will have decayed to 1/2 of C0. After 2(5,730) = 11,460 years, C1 will have decayed to 1/4 of C0. After 3(5,730) = 17,190 years, C1 will have decayed to 1/8 of C0. After 4(5,730) = 22,920 years, C1 will have decayed to 1/16 of C0. After 5(5,730) = 28,650 years, C1 will have decayed to 1/32 of C0.
We'll have to solve the following equation to find the age of the artifact.
C1 = (70/100) * C0
Substitute the value of C0 into the equation and solve for t,
t = ln(0.7) / ln(1/2) = 3102.5 years
The artifact was made about 3102.5 years ago.
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123000000 as a power of 10
Answer:
123,000,000 as a multiple of a power of 10 is
1.23 x 10⁸ .
15. Anna has $2.00 in change, including 5 quarters. What is the maximum number of dimes she can have? A 2 C 7 B 5 D 9
Answer:
To solve the problem, we need to first determine the value of the quarters Anna has. Since there are 5 quarters, we have:
5 quarters = 5 x $0.25 = $1.25
Thus, Anna has $2.00 - $1.25 = $0.75 left. We can find the maximum number of dimes she can have by dividing this amount by the value of a dime, which is $0.10. Therefore:
$0.75 ÷ $0.10 = 7.5
Since Anna cannot have a fraction of a dime, we round down to the nearest whole number to get a maximum of 7 dimes. Therefore, the answer is option B, 5.
Oliver practices the piano 448 minutes in 4 weeks. At what rate did she practice, in
minutes per day?
Answer:
16
Step-by-step explanation:
First you figure out how many days are in 4 weeks which is 28. Then you do 448 divided by 28 which equals 16. There's your answer.
if a sample of 5 lightbulbs is selected, find the probability that none in the sample are defective.
The probability of selecting a sample of 5 lightbulbs without any defective bulbs is then given by p^5, where p is the probability of not having a defective bulb.
In this situation, the probability of selecting a sample of 5 lightbulbs without any defective bulbs is calculated using the binomial distribution. The probability of success, p, is the probability that a single lightbulb is not defective, and the probability of failure, q, is the probability that a single lightbulb is defective. The probability of selecting 5 lightbulbs with no defective bulbs is then given by the equation:
P(x=0) = (p^5)*(q^0) = p^5
In this case, p is the probability of not having a defective bulb, and q is the probability of having a defective bulb. The probability of selecting 5 lightbulbs without any defective bulbs is then given by p^5.
For example, if the probability of not having a defective bulb is 0.95 and the probability of having a defective bulb is 0.05, then the probability of selecting a sample of 5 lightbulbs without any defective bulbs is 0.95^5 = 0.7737. This means that there is a 77.37% chance of selecting a sample of 5 lightbulbs without any defective bulbs.
To sum up, the probability of selecting a sample of 5 lightbulbs without any defective bulbs is calculated using the binomial distribution. The probability of success is the probability of not having a defective bulb, and the probability of failure is the probability of having a defective bulb. The probability of selecting a sample of 5 lightbulbs without any defective bulbs is then given by p^5, where p is the probability of not having a defective bulb.
The correct question is:
A box contains 100 bulbs, out of which 10 are defective. If a sample of 5 lightbulbs is selected, find the probability that none in the sample are defective
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what is the probability that a senior nutrition major and then a sophomore non-nutrition major are chosen at random? express your answer as a fraction or a decimal number rounded to four decimal places.
Answer: 60%
Step-by-step explanation:
As mentioned earlier, we need to know the number of senior nutrition majors and sophomore non-nutrition majors to calculate the exact probability. Without this information, we cannot provide a specific answer to the question.
However, we can provide a general formula for computing the probability, assuming that the selections are made without replacement and the population of students is large enough to assume independence:
Probability of selecting a senior nutrition major and then a sophomore non-nutrition major = (Number of senior nutrition majors / Total number of students) × (Number of sophomore non-nutrition majors / (Total number of students - 1))
Once we have the values for the number of senior nutrition majors and sophomore non-nutrition majors, we can substitute them into this formula to obtain the probability, which will be a decimal number rounded to four decimal places.
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Eight avocados cost $4. How much is 1 avocado?
The cost of one avacado is equal to 0.5$ and it is found by the use of division method.
One of the four fundamental mathematical operations, along with addition, subtraction, and multiplication, is division. an a person who knows what I mean by just calling it what they do when they just want to go to the store. Just call it what they call it, whatever ites. Really, whatever it is, these are the same people. It is a mathematical operation used for equal distribution and equal grouping.
One of the fundamental mathematical operations is division, which involves breaking a larger number into smaller groups with the same number of items.
We are given the cost of 8 avacados= $4.
The cost of 1 avacado= 1/8 * 4 = 1/2 = 0.5.
Hence, the cost of one avacado is equal to $0.5.
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noah sold 30 avocados that were small and large. he sold the small avocados for 35 cents and the large ones for 50 cents. if noah made $13.50, how many of each kind did he sell?
Noah sold 10 small avocados and 20 large avocados.
Let's assume that Noah sold "x" small avocados and "y" large avocados.
From the given information, we can write two equations:
x + y = 30 (since Noah sold a total of 30 avocados)
0.35x + 0.50y = 13.50 (since Noah made $13.50)
Now, we can use any method to solve these equations, such as substitution or elimination. Here, we will use the substitution method:
From the first equation, we can write:
x = 30 - y
Substituting this value of x in the second equation, we get:
0.35(30 - y) + 0.50y = 13.50
Simplifying this equation, we get:
10.50 - 0.35y + 0.50y = 13.50
0.15y = 3
y = 20
Substituting this value of y in the equation x = 30 - y, we get:
x = 30 - 20 = 10
Therefore, Noah sold 10 small avocados and 20 large avocados.
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