Please help ASAP!! I can’t seem to figure it out

Acylinder has volume 45π and radius 3. what is it’s height?

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

Is ofat (-25, 0), (25, 0) co- (0, -15), (0, 15)?