Problem 4.5. A 17 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

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Problem 4.5. A 17 ft ladder is leaning against a wall. If the bottom of the ladder is pulled along theground away from the wall at a constant rate of 5 ft / s, how fast will the top of the ladder be movingdown the wall when it is 8 ft above the ground?