Formula:
V = 1/3 * pi * r^2 * h
Plug in what we know:
V = 1/3 * 3.14 * 3^2 * 4
V = 37.68cm^3
So the volume is 37.68cm^3 which rounds to 37.7cm^3.
10(-1c+7)-3c
(-10c+70)-3c
-13c+70 is your answer
5/1, 15/3, and 10/2 are all valid answers to that question.