imstressed
12.10.2019 •
Mathematics
The benton family wants to put a circular fence around their pool. they want it to be exactly 15 feet from the center of the pool. how many feet of fencing is needed?
a. 92
b. 94
c. 47
d. 30
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Ответ:
The perimeter of a circle is:
P = 2 π r
The distance from the center of the pool to the fence is actually a radius of the circle:
r = 15 ft
P = 2 * 3.14 * 15
P = 94.2 ft² ≈ 94 ft²
Ответ:
=16+(-36)
= -20