posted by Christy .
Story problems are my favorite. However, I can not figure this one out. THe stopping distance d of a car after the breaks are applied varies directly as the square of the speed r. If a car traveling at 70mph can stop in 270 ft. How many feet will it take the same car to stop when traveling at 90mph
is the basic relationship. Take the 70/270f data, and solve for k.