1. The problem statement, all variables and given/known data Find the volume of the solid formed by revolving the functions: y=x2 and y=1 about the line y=6 2. Relevant equations ∏∫(ro2-ri2)dx 3. The attempt at a solution I found the outer radius to be (1-x2)-6 and my inner radius to be -6. Also, the limits of integration were -1 and 1. Plugging it all in got -224/15. This is obviously wrong because it is negative, and the positive value didn't work either. Does anyone have a clue on how to do this?