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Novay_Z [31]
3 years ago
12

The surface area of a sphere is found using the formula , where r is the radius. If the surface area of a sphere is 64 square fe

et, what is the radius, in feet? A. –4 B. 16 C. 4 D. –16
Mathematics
1 answer:
Nadusha1986 [10]3 years ago
8 0

Answer:

It should be C,  I believe?

Step-by-step explanation:

The surface area of a sphere can be found by the formula: A=4πr²

If the area is 64 square feet.  -----> square feet means doubled

A=64² = 4096 feet

4096 =4πr²   (divide 4π on both sides)

4096 ÷4π = 1024π

1024π = r²  (square root r on both sides)

r = 56.718523229


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