Question: The function dened by y = 1/ r2 x2 has as its graph 3 semicircle of radius r with center at (0,0) (as shown in

 The function dened by y = 1/ r2 x2 has as

its graph 3 semicircle of radius r with center at (0,0) (as

The function dened by y = 1/ r2 x2 has as its graph 3 semicircle of radius r with center at (0,0) (as shown in the gure to the right). Find the volume that results when the semicircle y = '25 x2 is rotated about the x-axis. The volume is D cubic units. (Type an exact answer, using 11: as needed.)

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