# Chapter 3 - Equations and Problem Solving - 3.3 - More on Solving Equations and Problem Solving - Problem Set 3.3: 47

The volume of the sphere is 972$\pi$ cubic inches.

#### Work Step by Step

The formula for the volume of a sphere is V = $\frac{4}{3}$ $\times$ $\pi$ $\times$ $r^{3}$ Substitute 9 for r to obtain: V = $\frac{4}{3}$ $\times$ $\pi$ $\times$ $9^{3}$ V = $\frac{4}{3}$ $\times$ $\pi$ $\times$ 729 V = 4 $\times$ $\pi$ $\times$ 243 V = 972$\pi$

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