Posted by ggift on .
THE POLITICAL NOISE PROBLEM:
The amount of background noise is important to television news reporters. One station developed the formula
N= t2 + 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? Can you explain this please??

ALGEBRA 
bobpursley,
The greatest? Plot the equation, and see when it peaks.

ALGEBRA 
ggift,
I'm still learning how to plot on my TI 83 plus..can you guide me?