Answer:
1017.88
Step-by-step explanation:
The volume of a cone is V=1/3hπr²
First, we are going to do exponents: what is 9*9? 81. So now our equation is V= 1/3h * 3.14 * 81 (Pi is 3.14, so we filled that in too.)
Now we need to find 1/3 of our height, or 1/3 * 12, which is 4. Our equation is now V= 4 * 3.14 * 81
Solve and you get 1017.88
I hope this helped, please mark Brainliest, thank you!