What is a possible turning point for the continuous function f(x)

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left