Chapter 8.3, Problem 34E

(3) Find the volume of the solid obtained by rotating the triangle (2, 0) (2, 4) (1, 1) about the horizontal axis.

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Determine the diameter of a hole that is drilled vertically through the center of the solid bounded by the graphs of the equations z-29e-(x2 + y2)/4, z = 0, and x² + y2 = 25 if one-tenth of the volume of the solid is removed. (Round your answer to four decimal places.) Need Help? Read it Watch It

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The region bounded by the y-axis, f(x) = 8 – x and g(x) = e" forms the base of a solid. Cross sections perpendicular to the x-axis are semicircles. Find the volume of this solid. volume = %3D