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3v^2 2d
d=------- and t= ------
20 v

d is the distance traveled, in meters, after the brakes are applied.

v is the velocity, in meters per second, before the brakes are applied.

t is the time, in seconds, it takes to stop after the brakes are applied.

The formulas above are used to compute the distance a car travels after the brakes aree applied. If the driver of a car applied the brakes just as a traffic light turned yellow and stopped exactly 6 seconds later, what is the values of v?