Answer to Question #43295 in Algebra for de

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...The atmospheric pressure P in pounds per square inch (psi) is given by
P = 14.7 e−0.21 awhere a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 12.11 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the nearest foot.)