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11-89.

Multiple Choice: The base of a solid is the region between the curve and the -axis on the interval . The cross-sections perpendicular to the -axis are semicircles. The volume of the solid is: Homework Help ✎

  1. 1.127

  1. 1.271

  1. 1.721

  1. 2.171

  1. 2.711

The diameter of each semicircle is y/2.
The area of each semicircle is π(r2)/2.
The width of each cross-section is dx.