A hot air balloon is 150 ft above the ground when a motorcycle (traveling in a straight line on a

A hot air balloon is 150 ft above the ground when a motorcycle (traveling in a straight line on a horizontal road) passes directly beneath it going 60 mi/hr (88 ft/s). If the balloon rises

vertically at a rate of 14 ft/s, what is the rate of change of the distance between the motorcycle and the balloon 7 seconds later?

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