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9-10.

Use the washer method to calculate the volume of the solid generated by revolving the region bounded by and about the -axis. Homework Help ✎

Start by determining the points of intersection. The -values of the points of intersection will be the bounds of your integral (this is rotation about the -axis, so the width of the washers is ).

The general formula for the washer method is:

Which function is the outer radius and which function is the inner radius ?