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Travka [436]
3 years ago
15

Ms.Friedman and Mrs.Elliot both teach sixth grade math. They share a storage closet. What is the total area of both rooms and th

e storage closet.

Mathematics
1 answer:
Citrus2011 [14]3 years ago
8 0
Answer:
Total area of both rooms and the storage = 2844 ft^2

Explanation:
Total area would initially be the summation of the area of Ms. Friedman's room and storage added to Mrs. Elliot's room and storage.
However, we are given that the storage is shared.
So now, the total area would be equal to Ms. Friedman's room and storage + Mrs. Elliot's room and storage - area of closet

Now, we can notice that:
Ms. Friedman's room and storage = Mrs. Elliot's room and storage

Therefore:
Total area = 2*Ms. Friedman's room and storage - area of storage

1- getting area of Ms. Friedman's room and storage:
length = 36 ft 
width = 40 ft
area of Ms. Friedman's room and storage = length * width
area of Ms. Friedman's room and storage = 36 * 40
area of Ms. Friedman's room and storage = 1440 ft^2

2- getting area of closet:
length = 36 - 30 = 6 ft
width = 40 - 34 = 6 ft
area of closet = length * width
area of closet = 6 * 6 = 36 ft^2

3- total area of both rooms and the storage:
Total area = 2*Ms. Friedman's room and storage - area of storage
Total area = 2*1440 - 36 
Total area = 2844 ft^2

Hope this helps :)

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The US Census reported that it takes workers an average of 28 minutes to get home from work with standard deviation 5 minutes. A
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Using the z-distribution, as we have the standard deviation for the population, to test the hypothesis, it is found that this is evidence that workers in the large city take longer than 28 minutes to get home from work.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if the mean time is of 28 minutes, that is:

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At the alternative hypothesis, it is tested if the mean time is greater than 28 minutes, that is:

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<h3>What is the test statistic?</h3>

The test statistic is given by:

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In this problem, the values of the parameters are given by:

\overline{x} = 32, \mu = 28, \sigma = 5, n = 10

Hence:

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z = \frac{32 - 28}{\frac{5}{\sqrt{10}}}

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<h3>What is the decision?</h3>

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