Answer:
v=πr^2h
v/πr^2=h
Step-by-step explanation:
Okay so...
There are 21 groups of 3.
21 x 3 = 63.
63 people are in the room.
Are there any parentheses in this equation? that would determine what you do first.
if it is (7+2)•4 your answer is 36.
if it is 7+2•4, then your answer would become 7+8, which is 15.