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January 28, 2015

January 28, 2015

Posted by **Anonymous** on Sunday, May 19, 2013 at 12:37am.

- Mathematics -
**MathMate**, Sunday, May 19, 2013 at 7:51amAssuming radiator reaches 120° between 0 and 4 minutes.

Trying to solve:

120 = 6.2t² + 12t +32

or

6.2t² + 12t - 88 = 0

Use quadratic formula to get

t=-4.8 or t=2.92 sec.

Reject t=-4.8 because it is not within interval [0,4].

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