ALGEBRA

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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 -

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

  • ALGEBRA -

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

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