Question

I need help with this calculus problem...

Answer 1

\[A=\int^7_02\pi ydx\]

Answer 2

then is just be 2piyx, from 0 to 7

Answer 3

That gives me 343pi/2

Answer 4

343pi/2 doesn't come close to the answer options

Answer 5

Oh we forgot to add the base area

Answer 6

How would I do that?

Answer 7

\[Area = \int\limits_{a}^{b} 2\pi f(x) \sqrt{1 + (dy/dx)^2} dx\]

Answer 8

just find f'(x) and plug it in the formula, then evaluate

Answer 9

Thank you so much!

Answer 10

answer is D