## Elementary Algebra

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