Question

need help on the attachment @Calculus1

Answer 1

???

Answer 2

\[2\pi \int\limits\limits_{0}^{2}(x)*(x ^{2})dx = 2\pi((1/4)x ^{4} (evaluated from 0 to 2)\]

=\[4\pi\]

Answer 3

well I got 8pi and you got 4pi that wierd

Answer 4

Lol, let's see what I messed up on :-))

Answer 5

Hmmm, I wish I could edit that other post. Yep, 8pi. Sorry about that :-(

Answer 6

its ok

Answer 7

def check out Paul's notes on these "revolution" integrals. They'll give you a lot of practice :-)

Thanks for the medal!

Answer 8

no prob!