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The function D(v) in the figure below gives the air resistance, or drag (in pounds) , on a blunt object as a function of its velocity.(Notice that the curve rises sharply near v = 700 miles/hour, the speed of sound.This represents the "sound barrier.") If a blunt object traveling 725 miles/hour is accelerating at the constant rate of 6000 miles/hour2, at approximately what rate (in pounds/hour) is the drag increasing at that moment? Select the closest answer.
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