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A plane flying horizontally at an altitude of 2 mi and a speed of 540 mi/h...

A plane flying horizontally at an altitude of 2 mi and a speed of 540 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 4 mi away from the station. (Round your answer to the nearest whole number.)
mi/h
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