(a) What quantities are given in the problem?
(b) What is the unknown?
(c) Draw a picture of the situation for any time 1.
(d) Write an equation that relates the quantities.
(e) Finish solving the problem.
A street light is mounted at the top of a 15-ft-tall pole. A man 6ft tall walks away from the pole with a speed of 5 ft/s along a straight path. How fast is the tip of his shadow moving when he is 40 n from the pole?
Calculus: Early Transcendental Functions
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