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May 26, 2015

Homework Help: math

Posted by Anonymous on Thursday, March 29, 2012 at 10:39pm.

in 1968, vehicle emmision standards allowed 6.3 hydrocarbons released per mile driven. By 1980, the standards allowed only .41 hydrocarbons released per mile driven. What was the rate of change from 1968 to 1980?

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