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OpenStudy (anonymous):
You have 80 yards of fencing to enclose a rectangular region. Find the dimensions of the rectangle that maximize the enclosed are. What is the maximum area?
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OpenStudy (barrycarter):
Hint: let x be one side of the rectangle
OpenStudy (anonymous):
then th breadth is 40-x
OpenStudy (anonymous):
the area is x(40-x) = 40x-x^2
OpenStudy (anonymous):
now maximize this wrt x
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