Question
A balloon is rising straight up at a rate of 9 ft/sec. An observer is on the ground 120 feet from the point of lift-off.
A balloon is rising straight up at a rate of 9 ft/sec. An observer is on the ground 120 feet from the point of lift-off. How fast is the angle of elevation changing at the moment the balloon is 50 feet in the air?
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Precalculus Real Mathematics, Real People
Authors: Ron Larson, Gaylord N Smith
6th Edition
1133714749, 9781133714743
