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integral of the function

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Amy plans to paint both sides of a fence whose base is in the xy-plane and is given by the points (x,y) where x = 30cos^3(t) and y = 30sin^3(t) for 0 <= t <= (PI/2), and whose height z at (x,y) is given by z = 1+(1/3)y, all measured in feet. How many gallons of paint will Amy need if a gallon covers 200 ft^2?

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The integral of the function is assessed.

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