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9. (l points) A 10 ft ladder is leaning against a wall. if the bottom of the ladder is pulled along the ground away from

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9. (l points) A 10 ft ladder is leaning against a wall. if the bottom of the ladder is pulled along the ground away from the wall at a constant rate of S ft/'see, how fast will the top ofthe ladder be moving down on the wall when it is 8 Ft above the ground

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