The volume of the solid generated by revolving the region bounded by x²=4y and y2=4x about y=4 is to be solved using the ·b circular ring method. The formula for solving for the volume is given by V= (r. ²-r, 2) dh. What is the expression corresponding to? (A) 4-y (В 4- x² 4 2√√y-12²2 4 4-2√x - t

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