Solve.A rectangle that is x feet wide is inscribed in a circle of radius 20 feet. Express the area of the rectangle as a function of x. Graph the function and from the graph determine the value of x, to the nearest tenth of a foot, which will maximize the area of the rectangle.
A. 28.3 feet
B. 28.7 feet
C. 29.1 feet
D. 27.9 feet
Answer: A
Mathematics
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A. 
B. 
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