February 20, 2017

Homework Help: math

Posted by mat on Friday, July 22, 2011 at 8:28pm.

the distance x cm and y cm are related by the eqt. 1/x+1/y=1/9, if x is increasing at a rate of 8 cm/s, calculate the rate at which y is changing when x=15. [ans:-18]

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