4. Find the volume of solid of revolution (in cubic units) when the area of the region bounded by y = 4x – x', and y = x is revolved about the y-axis. 3+ y- dx -x2 2 ++ -5 4 -3 -2 A) 40.76 cu. units B) 47.99 cu. units C) 45.87 cu. units D) 42.41 cu. units

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