The volume of a sphere is 81π cubic centimeters. Which equation can be used to solve for the radius of the sphere?

A. 81π=4πr^2

B. 81π=4πr^3

C. 81π=4/3πr^3

D. 81π=4/3πr^2

Answers (1)
  1. Marit
    We know that

    [volume of a sphere] = (4/3) * pi*r3

    volume=81*pi cm3

    so

    81*pi = (4/3) * pi*r3

    therefore

    the answer is the option

    C.) 81π=4/3πr^3
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