Physics, 28.06.2019 05:00 maddiemalmstrom

A hot-air balloon is 120 ft above the ground when a motorcycle (traveling in a straight line on a horizontal road) passes directly beneath it going 30 mi/hr (44 ft/s). if the balloon rises vertically at a rate of 8 ft/s, what is the rate of change of the distance between the motorcycle and the balloon 9 seconds later?

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