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Math Help - Volume of a solid

  1. #1
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    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!
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  2. #2
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    Quote Originally Posted by ebonyscythe View Post
    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
    Attached Thumbnails Attached Thumbnails Volume of a solid-relation.jpg  
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  3. #3
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    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.
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