1. The problem statement, all variables and given/known data Find the volume of the solid obtained by rotating the region in the first quadrant bounded by the hyperbola y2−x2=4 and the lines y=0, x=3 and x=5 about the y− axis. 2. Relevant equations Nothing specific...general equations 3. The attempt at a solution So I would write it as I was wondering if it was just 2x*pi*dx*(√4+x2) from x=3 and x=5? Or would I have to incorporate the "hole" from x=0 to x=3.