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2. The curved roof of a shelter is 80 feet long and 40 feet wide. A cross section of the roof is the inverted catenary

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2. The curved roof of a shelter is 80 feet long and 40 feet wide. A cross section of the roof is the inverted catenary y = 31 - 10(ez + e 20). Find the number of square feet of roofing on the shelter. (See figure below). Do evil 80 from290 6: 20+ -20 20 y = 31 - 10(e */20 + e-x/20)

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