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liq [111]
1 year ago
8

A pencil ladder, represented in the diagram at left, is a compact ladder

Mathematics
1 answer:
Savatey [412]1 year ago
7 0

Answer:

About 10 feet

Step-by-step explanation:

Since I'm assuming you need to find the height of the supporting wall, I recommend drawing a diagram to help you better visualize what it would look like, like in the attached diagram. You'll see that it forms a triangle, with leg lengths 4.5 and x and a hypotenuse length 11. Use the Pythagorean Theorem to find the height of the supporting wall.

Hope this helps!

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valina [46]
<h3>Answer:  0.061</h3>

===============================================

Explanation:

Add up the values to get

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Then divide over 13 (the number of values) to get 24.54/13 = 1.8876923 which is approximate.

So the mean is approximately 1.8876923

---------------------

Now make a spreadsheet as shown below

We have the first column as the x values, which are the original numbers your teacher provided. The second column is of the form (x-M)^2, where M is the mean we computed earlier. We subtract off the mean and square the result.

After we compute that column of (x-M)^2 values, we add them up to get what is shown in the highlighted yellow cell at the bottom of the column.

That sum is approximately 0.04403076924

Next, we divide that over n-1 = 13-1 = 12

0.04403076924 /12 = 0.00366923077

That is the sample variance. Apply the square root to this to get the sample standard deviation. This is the point estimate of the population standard deviation. As the name implies, it works for samples that estimate population parameters.

sqrt(0.00366923077) = 0.06057417576822

This rounds to 0.061 which is the final answer.

5 0
2 years ago
A square picture on the front page of a newspaper occupies an area of 24 square inches. Find the length of each side of the squa
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Answer:

Well if you are trying to find the length of each side you Divide 24 by 4 so your answer would be 6

Step-by-step explanation:


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