Refer to Problem 19. At what rate is the person's shadow growing when he is 20 feet

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Refer to Problem 19. At what rate is the person's shadow growing when he is 20 feet from the pole?
Problem 19
A streetlight is on top of a 20-foot pole. A person who is 5 feet tall walks away from the pole at the rate of 5 feet per second. At what rate is the tip of the person's shadow moving away from the pole when he is 20 feet from the pole?
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College Mathematics for Business Economics Life Sciences and Social Sciences

ISBN: 978-0321614001

12th edition

Authors: Raymond A. Barnett, Michael R. Ziegler, Karl E. Byleen

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