Ana26
5

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

volume of a sphere is calculated using a formula: $\frac{4}{3} \pi * r^{3}$ so in this case: $\frac{4}{3} \pi * 9^{3}$ and taht is: $\frac{4}{3} \pi *729$ $= 972 \pi$ Hope it helps you! :)
$V=\frac43 \pi r^3\\ r=9m\\ \\ V=\frac43 \pi 9^3=\frac43 \cdot 729\pi=972\pi$