# Volume of a solid

• Mar 4th 2008, 05:49 PM
ebonyscythe
Volume of a solid
I need help with this one, I had a graph of the equation through derive at school, but now that I'm at home I can no longer access that program (the free trial also expired on me). I can't seem to get it to graph on my Ti-89; it gives me an error. Anyways, here is the given problem:

First use Derive to graph the equation (x-40)y^2=10x(x-30). Now find the volume of the solid obtained by revolving the region between the graph and the x-axis for 0<x<30* around the x-axis. Show all work.

*Those <'s are suppose to be less then or equal to.

Could someone give me some help? A step by step would be awesome since I have a test coming up soon, but I'd appreciate anything!
• Mar 4th 2008, 06:28 PM
topsquark
Quote:

Originally Posted by ebonyscythe
I need help with this one, I had a graph of the equation through derive at school, but now that I'm at home I can no longer access that program (the free trial also expired on me). I can't seem to get it to graph on my Ti-89; it gives me an error. Anyways, here is the given problem:

First use Derive to graph the equation (x-40)y^2=10x(x-30). Now find the volume of the solid obtained by revolving the region between the graph and the x-axis for 0<x<30* around the x-axis. Show all work.

*Those <'s are suppose to be less then or equal to.

Could someone give me some help? A step by step would be awesome since I have a test coming up soon, but I'd appreciate anything!

Does this help?

-Dan
• Mar 4th 2008, 06:51 PM
ebonyscythe
That helps more then you know! Now lets see if I can dredge up some old information on the disk method and such...

Thanks much.