Highway safety engineers can use the formula d = 0.05s2 + 1.1s to estimate the minimum stopping distance d in feet for a vehicle traveling s miles per hour. If a car is able to stop after 125 feet, what is the fastest it could have been traveling when the driver first applied the brakes? a. about 40.2 mph c. about 45.9 mph b. about 55 mph d. about 75.6 mph
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