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1. Consider the region bounded by the graphs of x = y2 and x = 9. Find the volume of the solid that has this

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1. Consider the region bounded by the graphs of x = y2 and x = 9. Find the volume of the solid that has this region as its base if every cross section by a plane perpendicular to the x-axis has the shape of an equilateral triangle. (Hint: Precalc review...if one side of an equilateral triangle ,5 is s, then the area of the triangle is Tsz). 2 2. The base of a solid is a region bounded by the curve ;_:+ iz = 1 (an ellipse with the major and minor axes of lengths 16 and 8 respectively). Find the volume of the solid if every cross section by a plane perpendicular to the major axis (x-axis) has the shape of an isosceles triangle with height equal to 1} the length of the base. 3. The base of a solid is a right triangle whose base side has length a and whose perpendicular side has length %a. Find the volume of the solid if cross sections perpendicular to the base of the triangle are semicircles. 4. A solid has as its base the region bounded by the curves y = 2xz +2 and y = x2 +1. Find the volume of the solid if every cross section of a plane perpendicular to the xaxis is a trapezoid with lower base in the xy-plane, upper base equal to % the length of the lower base, and height equal to 2 times the length of the lower base

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