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A rectangular poster is to contain 520 square inches of print. The margins at the top and bottom of the poster are to be 2

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A rectangular poster is to contain 520 square inches of print. The margins at the top and bottom of the poster are to be 2 inches each, and the margins to the left and right of the poster are each to be 3 inches . What should the dimensions of the poster be so that the least amount of paper is used? Show how you know for sure that your dimensions yield the least amount of paper ( 20 pts )

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