February 22, 2017

Homework Help: algebra

Posted by eric on Monday, December 5, 2011 at 1:31pm.

A machine's ideal temperature is below 135 degreesF. The temperature T in degrees x minutes after it is turned on is T=-0.005x^2 = 0.45x + 125. Will the temperature ever exceed 135 degrees. Use the discriminate to decide. If the machine operates for 90 minutes before being turned off, how many times will the temperature be 134 degrees?

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