A 10-ft ladder rests against a wall at π/4 radians. If it were to begin to slip, when the bottom of the ladder is moving at 0.08 ft/s, how fast would the top of the ladder be moving down the wall? (How fast would the height of the upper end of the ladder on the side of the wall be changing?) 0.071 ft/s 0.069 ft/s 0.074 ft/s 0.080 ft/s

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