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December 19, 2014

Homework Help: math

Posted by sam on Tuesday, September 8, 2009 at 10:22pm.

Could someone help explain what I am to do?
The amount of background
noise is important to television news reporters.
One station developed the formula n= -t^2 + 12t +54
showing the noise level in decibels (N) as it relates to the
time after the speaker stops talking in seconds (t). How
many seconds after the speaker stops will the noise level
be the greatest?
I believe that I would need to figure out the vertex of the numbers but I am confused as how I would do that. Is their a formula?

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