A car with good tire tread can stop in less distance than a car with poor tire tread. The formula for stopping distance d, in feet, of a car with good tread on dry cement is approximated by d=0.04v2 + 0.5v, where v is the speed of the car. If the driver must stop within 66 ft, what is the maximum safe speed, to the nearest mile per hour, of the car?
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A car with good tire tread can stop in less distance than a car with poor tire tread. The formula for stopping distance d, in feet, of a car with good tread on dry cement is approximated by d=0.04v2 + 0.5v, where v is the speed of the car. If the driver must stop within 66 ft, what is the maximum safe speed, to the nearest mile per hour, of the car?
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