sarah121868

19.10.2021 • 

Mathematics

When you dive below the surface of the water, the pressure increases. You can feel this in your ears when you dive to the bottom of a deep swimming pool or spring. The function that describes this relationship is P(d)= 14.5 + 29/66d, where d is the depth in feet below the surface of the water and P is the pressure in pounds per square inch (PSI). What is the pressure at the surface of the water? Select the correct units from the second box.

At what depth is the pressure exactly double the pressure at the surface of the water?Select the correct units from the second box.

What is the pressure at a depth of 66 feet? Use function notation in the first box and give the answer in the second box.Select the correct units from the third box.

What is the pressure at a depth of 165 feet? Use function notation in the first box and give the answer in the second box.Select the correct units from the third box.

Ответ:

gamer85

16.09.2020

Mathematics

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There are 96 large tents and 60 small tents

Step-by-step explanation:

Here, we want to calculate the number of tents of each sizes there

Let the number of 6-boys tent be s and the number of 4-boys tent be f

6s + 4f = 816 ••••••(i)

Ratio of large to small ( ratio of s to f)

8:5 = s/f

8/5 = s/f

8f = 5s

f = 5s/8 ••••(ii)

Substitute ii into i

6s + 4(5s/8) = 816

6s + 5s/2 = 816

Multiply through by 2

12s + 5s = 1,632

17s = 1632

s = 1632/17

s = 96

f = 5s/8

f = (5 * 96)/8 = 60

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