Answer:
The volume of this cone is V = 50 (~50.27)
(I'm assuming that 'his' is height?)
8^2 + 12 - 2(8)
64 + 12 - 16
76 - 16
60
so your answer would be 60
I would simply consider saying that the answer is:
B. .533
because 8, 9-10th graders watched and 7 didn’t