The Solution:
Given:
We are asked to find the volume of the given sphere.
Using the given formula:
[tex]V=\frac{4}{3}\pi r^3[/tex]
In this case:
[tex]\begin{gathered} r=radius=9ft \\ \pi=3\text{ \lparen given\rparen} \end{gathered}[/tex]
Substitute these values in the formula.
[tex]V=\frac{4}{3}\times3\times9^3=4\times9^3=2916\text{ }ft^3[/tex]
Therefore, the correct answer is 2916 cubic feet.
