Step-by-step explanation:
the formula for the volume of a sphere is
pi×r³ × 4/3
with r being the radius.
we can see in the graphic that the radius is 9 ft.
now, all we need to do is putting that value into the formula and calculate :
pi×9³ × 4/3 = pi×9×9×9 × 4/3 = pi×9×9×3 × 4 =
= pi×81×12 = 972×pi ft³
