Use the shell method to set up and evaluate the integral that gives the volume of the solid generated by revolving the plane region about the y-axis. y = 36 - X2 y = 0 Step 1 Because the axis of revolution is vertical, use a ---Select-- representative rectangle as shown in the figure. 90 25 20 у 15 10- 5 0 4 6 The width Ax indicates that x is the variable of integration. The distance from the center of the rectangle to the axis of revolution is p(x) = x, and the height of the rectangle is h(x) = 36 - hx=