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Mathematics 13 Online
OpenStudy (anonymous):

I need help again! A 15-ft ladder is leaning against one wall of an alley 9 ft wide. the lade slips, its top sliding down the wall, its foot sliding across the alley and striking the opposite wall at a speed of 4ft/sec. how fast is the top of the ladder falling at that instance? calculus makes me want to cry!

OpenStudy (astrophysics):

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