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# balloon is rising vertically above a level, straight road at a constant rate of 3 feet/sec. Just when the balloon is 134 feet above the ground, a...

balloon is rising vertically above a level, straight road at a constant rate of 3 feet/sec. Just when the balloon is 134 feet above the ground, a bicycle moving at a constant rate of 19 feet/sec. passes under it. How fast is the distance s(t) between the bicycle and balloon increasing 6 seconds later?