Question

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 feet, what is the radius, in feet?

Answer 1

surface area of sphere
\[ A=4\pi r ^{2}\]
64=4 times pi times r
r=64/4times pi
r=64/4(3.142)
r=5.092 feet
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