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# Integration C4 problems... Watch

1. The region R is bounded by the curve C, the x axis and the lines x=-8 and x=8
The parametric equations fotr C are x=t^3 and y=t^2

a) Find the area of R
b) Find the volume of the solid of revolution formed when R is rotated through 2pi radians about the x axis

I ended up with my cartesian equation as 2(t)^4 but that gave me the wrong answer :/
2. (Original post by Claxxy)
I ended up with my cartesian equation as 2(t)^4 but that gave me the wrong answer :/
Doesnt the cartesian equation have to be in terms of "y" and "x" by eliminating "t"?
3. I don't know :/
I'm not really sure how to change parametric into cartesian...
4. don't try to convert it to cartesian form

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