MATHEMATICS COLLEGE

Find r, if 6r7 = 511 8​

Answers

Answer 1
Answer:

Answer:

121.857

Step-by-step explanation:

6×7r = 5118

42r = 5118

r = 121.857
Answer 2
Answer:

Answer:

121.8571428571429

Step-by-step explanation:

r=  5118/42

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A function is described by the following ordered pairs: (7, 4.5) (–4, 7.2) (–7.2, –4) (5.2, 3) Which set of ordered pairs represents the inverse of the function? (7, –4), (–7.2, –4), (3, 5.2), (4.5, –4) (7, –4), (–7.2, 5.2), (4.5, 7.2), (–4, 3) (4.5, 7), (7.2, –4), (–4, –7.2), (3, 5.2) (7, 4.5), (–4, 7.2), (–7.2, –4), (5.2, 3)
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Maria, Zach y Jill comparten una pizza. Maria come la mitad de la pizza, Zach come 4/6 y Jill come 3/12 de la pizza. ¿Quién come más?
In a climate survey, it was determined that in a random sample of 15 days, the average temperature in Kalamazoo at 2:00 PM in the months of July and August is 73.38 degrees with a standard deviation of 3.798 degrees. Using this information, a 95% confidence interval for the average is (71.28, 75.48). Which of the following is the appropriate interpretation of this interval?1)We are certain that 95% of the days in the months of August and July will have a temperature at 2:00 PM between 71.28 and 75.48.2)We cannot determine the proper interpretation of this interval.3)We are 95% confident that the average daily temperature for the months of July and August at 2:00 PM for the days recorded is between 71.28 and 75.48.4)We are 95% confident that the proportion of all days' temperatures will fall between 71.28 and 75.48.5)We are 95% confident that the average daily temperature for the months of July and August at 2:00 PM is between 71.28 and 75.48.

Work out the circumference of this circle Give your answer in terms of pie and state in units R=14cm Answer= Units=

Answers

Answer:

28π cm²

Step-by-step explanation:

Circumference Formula: C = 2πr

Simply plug in r into the formula:

C = 2π(14)

C = 28π or 87.9646

Answer:

28π cm

Step-by-step explanation:

The circumference of a circle has the formula 2πr.

2 × π × r

Where r is the radius.

2 × π × 14

28 × π

= 28π

The circumference is 28π and the unit is centimeters.

Need help asap

6. Which line has a slope equal to 1?

HELP ON 7 two

Answers

Answer:

6 is the third one 7 is D

Step-by-step explanation:

hope this helps

if its wrong my bad

A business student at Nowledge College must complete a total of 65 courses to graduate. The number of busi-ness courses must be greater than or equal to 23. The number of nonbusiness courses must be greater than or equal to 20. The average business course requires a textbook costing $60 and 120 hours of study. Non-business courses require a textbook costing $24 and 200 hours of study. The student has $3,000 to spend on books.

Answers

Based on the constraints and objective function that apply to the business student at Nowledge College, the set of linear equations are:

  • 60x + 24y ≤ 3,000
  • x + y ≥ 65
  • x ≥ 23
  • y ≥ 20

What set of linear equations describe the constraints?

Assume the number of business courses to be x and the number of nonbusiness courses to be y.

The total cost of both need to be less than $3,000 so the inequality is:

60x + 24y ≤ 3,000.

Both courses need to be at least 65 if the student wants to graduate so:

x + y ≥ 65

Business courses should be equal to or more than 23 and nonbusiness courses should be greater than or equal to 20 so:

x ≥ 23

y ≥ 20

Find out more on linear equations at brainly.com/question/12788590.

Answer:

69

Step-by-step explanation:

A researcher records the repair cost for 8 randomly selected refrigerators. A sample mean of $57.89 and standard deviation of $23.69 are subsequently computed. Determine the 95% confidence interval for the mean repair cost for the refrigerators. Assume the population is approximately normal. Step 1 of 2 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Answers

The question is incomplete! the complete question along with answer and step by step explanation is provided below.

Question:

A researcher records the repair cost for 8 randomly selected refrigerators. A sample mean of $57.89 and standard deviation of $23.69 are subsequently computed. Determine the 95% confidence interval for the mean repair cost for the refrigerators. Assume the population is approximately normal.

Step 1 of 2 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Step 2 of 2 : Construct the 95% confidence interval. Round your answer to two decimal places.

Given Information:  

Sample mean repair cost  = $57.89

Sample standard deviation = σ = $23.69

Sample size = 8

Confidence level = 95%

Required Information:  

step 1: critical value = ?

step 2: 95% confidence interval = ?

Answer:

step 1: critical value = 2.365

step 2: 95% confidence interval = ($38.08, $77.70)

Step-by-step explanation:

Since the sample size is less than 30 and the standard deviation of the population is also unknown therefore, we can use the t-distribution to find the required confidence interval.

The confidence interval is given by

CI = \bar{x} \pm MoE\n\n

Where \bar{x} is the mean repair cost and MoE is the margin of error that is given by

$ MoE = t_(\alpha/2)((s)/(√(n) ) ) $ \n\n

Where n is the sample size, s is the sample standard deviation, and t_(\alpha/2)  is the t-score corresponding to 95% confidence level.

The t-score corresponding to 95% confidence level is

Significance level = 1 - 0.95 = 0.05/2 = 0.025

Degree of freedom (DoF) = n - 1 = 8 - 1 = 7

From the t-table at α = 0.025 and DoF = 7

t-score = 2.365

Therefore, the critical value that should be used in constructing the confidence interval is 2.365

MoE = 2.365\cdot (23.69)/(√(8) ) \n\nMoE = 2.365\cdot 8.3756\n\nMoE = 19.808 \n\n

So the required 95% confidence interval is

CI = \bar{x} \pm MoE\n\nCI = 57.89 \pm 19.808\n\nCI = 57.89 - 19.808 \: and \: 57.89 + 19.808\n\nCI = \$38.08 \: and \:\:\$77.70\n

Therefore, we are 95% confident that the mean repair cost for the refrigerators is within the range of ($38.08, $77.70)

Adam is climbing up the stairs in a building. At a certain point, Adam starts counting the steps and when he reaches the last step, he has counted 56 steps. If he knows that there are a total of 100 steps in the building, how many steps did he climb before he started counting the steps?

Answers

Answer:

He climed 3 steps before he started counting the steps.

Step-by-step explanation:

pls mark me as a branliest

Answer:

The answer is he climbed 44 steps. Hope this helped :D

Step-by-step explanation:

What’s the correct answer for this?

Answers

Answer:

C

Step-by-step explanation:

HJN IS SIMILAR TO PQN
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