Washer Method Problem - how do I find the interval?

Suppose R is the region bounded by y = x^2, x = 2, and y = 0. A solid is generated by revolving R about the line y=-3. Find the volume of the solid.

So far, I've figured out...

R(x) = 7
r(x) = 7-x^2

To find the interval, do you let x^2 = -3??

Question

Washer Method Problem - how do I find the interval? 

Suppose R is the region bounded by y = x^2, x = 2, and y = 0. A solid is generated by revolving R about the line y=-3. Find the volume of the solid.

So far, I've figured out...

R(x) = 7
r(x) = 7-x^2

To find the interval, do you let x^2 = -3??

anonymous · Answer

And is this the correct graph?|dw:1394170797259:dw|

anonymous · Answer

can you show me your integral with your limits of integration?

anonymous · Answer

i always forget if you use dx or dy.

anonymous · Answer

|dw:1394170962051:dw| This is all I know so far... I don't get whether the interval is from 0 to 2, or something else.