SOLUTION: The function Upper D left parenthesis t right parenthesis equals 11 t squared minus 120 tD(t)=11t2−120t gives the distance a car going a certain speed will skid in t seconds.
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Question 1042085: The function Upper D left parenthesis t right parenthesis equals 11 t squared minus 120 tD(t)=11t2−120t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 170170 feet. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! D(t)=11t2−120t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 170 feet.
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11t^2 - 120t - 170 = 0
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Use the Quadratic Formula to get:
t = [120 +- sqrt(120^2-4*11*-170)]/(22)
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t = [120 +- sqrt(21880)]/22
Positive solution::
t = [120 + 147.92]/22
t = 12.18 seconds
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Cheers,
Stan H.
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