Answer:
169.56 ft.^2
Explanation:
alright to find the volume you need to find the area of the base and multiply that by the height.
step one, area of the base.
since the base is a circle, to find the area you need to square the base then multiply by pi.
4 * 4 * pi = 16pi
step 2,, not sure what to call this lol
16pi * 9 = 54pi
step 3, I really shouldn't have given my steps titles
pi = 3.14, so 54pi = 54*3.14
54*3.14 = 169.56
finally, square the unit because volume is 3-d
169.56 ft.^2