Hello!
The equation to find the volume of a cone is
[tex] \pi r^{2} \frac{h}{3} [/tex]
r is radius
h is height
Put in the values we know
[tex]3.14 * 9^{2} * \frac{4}{3} [/tex]
Square the number
[tex]3.14 * 81 * \frac{4}{3} [/tex]
multiply 81 by 3.14
[tex]254.34 * \frac{4}{3} [/tex]
Multiply
339.12
The answer is 339.1 cubic inches
Hope this helps!