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J . a) A ladder 26 long leans against the wall of a vertical building. If the bottom of the ladder slides away from the

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J . a) A ladder 26 long leans against the wall of a vertical building. If the bottom of the ladder slides away from the building horizontally at a rate of 1.4 ftfsec, how fast is the ladder sliding down vertically when the top of the ladder is 15ft. above the ground

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