S = 4·pi·r2
- S = surface area of sphere = 80 sq. ft.
- pi = 3.14
- r = radius
S = 4·pi·r2
80 = 4·(3.14)·r2
Solve for r
Jeff M.
asked • 05/30/17Surface area
A sphere has a surface area of 80 square feet. Which choice is the closest to its radius? Use 3.14 to approximate pi.
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