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1. The base of a solid is a circular region in the xy-plane bounded by the graph of 21:2 + y2 = 4. Find the

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1. The base of a solid is a circular region in the xy-plane bounded by the graph of 21:2 + y2 = 4. Find the volume of the solid if every cross section by a plane normal to the x-axis, with one side on the base, is a __ (a) Square (b) Equilateral Triangle (c) Semicircle (d) lsosceles Right Triangle (with leg of triangle lying in the base of the solid)

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