Posted by Andrew on Tuesday, December 16, 2008 at 8:30pm.
washer method!?
Find the volume of y=x^2+3, y=3, between [0,2] around y=3

Calculus  Reiny, Tuesday, December 16, 2008 at 8:35pm
make a sketch
wouldn't your volume be the same if you rotated y = x^2 around the xaxis, for [0,2] ??
I am sure you can do that easy one.
let me know what you got.

Calculus  Andrew, Tuesday, December 16, 2008 at 8:38pm
No it wouldnt be the same because one is a disk rule one is a washer rule

Calculus  Reiny, Tuesday, December 16, 2008 at 8:51pm
you are rotating it around y=3, so there is no hole.

Calculus  Andrew, Tuesday, December 16, 2008 at 9:05pm
your right im sorry, i was thinking we were rotating around x=3 lol but will you do it so i can check my answer?

Calculus  Reiny, Tuesday, December 16, 2008 at 9:26pm
I got 32pi/5

Calculus  Andrew, Tuesday, December 16, 2008 at 10:20pm
i think u forgot to add the 2x^3 to the antiderivitive for the fundamental theorm step

Calculus  jack, Tuesday, December 16, 2008 at 10:41pm
nm
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