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OpenStudy (anonymous):
A bridge is to be constructed across a river that is r feet wide. The arch of the bridge is to be semielliptical and must be constructed so that a ship less than s feet wide and t feet high can pass safely through the arch, as shown in the figure. Assume r = 500 feet, s = 100 feet, and t = 60 feet.
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OpenStudy (anonymous):
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