Question 433080
The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 60 mph can stop in 200 ft, how many feet will it take the same car to stop when it's traveling 70 mph?

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The distance is a function of the square of the speed.
The speed increases by a ratio of 7/6, so the distance increases by (7/6)^2
200*(7/6)^2 = 272.222... feet