Use the shell method to find the volume of the solid generated by revolving the region bounded by the line yequalsnothingxplus6 and the parabola yequalsxsquared about the following lines. a. the line xequals3 b. the line xequalsminus2 c. the x-axis d. the line yequals9

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.