1)
V = πr²h
V = (3.14)(2)²(5)
V = 62.8 in³
2)
V = 1/3πr²h
V = 1/3(3.14)(4)²(8)
V = 133.97 in³
3) Sum of the interior angles of a triangle are 180. So we can add the two given angles and subtract the sum by 180 to find the unknown angle.
180 - (93+48) = C
180 - (141) = C
39 = C
4)
V = 4/3πr³
V = 4/3(3.14)(4)³
V = 267.95 cm³
5)
V = πr²h
V = (3.14)(3)²(12)
V = 339.12 ft³
6)
V = 4/3πr³
V = 4/3(3.14)(9)³
V = 3,052.08 cm³
Hope this helps :)