What is the volume of a sphere when r = 9 ft

volume of a sphere is calculated using a formula:[tex] \frac{4}{3} \pi * r^{3} [/tex]so in this case:[tex] \frac{4}{3} \pi * 9^{3}[/tex]and taht is:[tex] \frac{4}{3} \pi *729 [/tex][tex]= 972 \pi [/tex]Hope it helps you! :)

[tex]V=\frac43 \pi r^3\\
r=9m\\
\\
V=\frac43 \pi 9^3=\frac43 \cdot 729\pi=972\pi[/tex]