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Another moving shadow A landscape light at ground level lights up the side of a tall building that is 15 feet from the light. A 6-ft-tall man starts walking (on flat terrain) from the light directly toward the building. How fast is he walking when he is 9 feet from the light if his shadow on the building is shrinking at 2 ft/s at that instant?
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Calculus: Early Transcendentals and MyLab Math with Pearson eText -- Title-Specific Access Card Package (3rd Edition) (Briggs, Cochran, Gillett & Schulz, Calculus Series)
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