Use the disk method to find the volume of the solid formed by revolving the region bounded by the x-axis, the y-axis and y = √4-T2 around the x-axis.

Find the center of mass of a thin plate covering the region bounded above by 2 the parabola y = 4 - x² and below by the x-axis. Assume the density of the plate at the point (x, y) is 8 = 2x², which is twice the square of the distance from the point to the y-axis.