Two cars start from a red light traveling down a highway in the same direction. One car averages 40mph, the

other car averages 55mph. how much time does it take before the two cars are 5 miles apart?

Using the rates given, after one hour, the two cars are 95 miles apart. So divide the distance by 5 miles to get 19 sets of 5 miles during one hour. Then divide your one hour by 19 sets of 5 miles to get the amount of time per 5 miles, which would be about 3.16 minutes, or 189 seconds. I hope this helps!