1. The problem statement, all variables and given/known data I'm confused about a certain aspect of shell method, washer method, and disk method. If I want to rotate using the washer method about the x-axis how do I get the new limits of integration? For example: y = 9-x2 over [0,3] about x-axis. I solved for x and got: x = sqrt(9-y) but how do I calculate the new limits? Also do I need to find the new limits for disk, shell, and washer method in certain cases or is it only for shell and washer? I know how to set up and solve the integral it's just calculating the new limits. Any help would be great.