Acar travels at a constant speed. what is the cars speed between checkpoints expressed as a unit rate? checkpoint as time being 1: 00pm total miles driven being 120 and checkpoint bs time being 3: 00pm and the total miles being 208

Average speed  = (distance covered) / (time to cover the distance).

Average speed between the checkpoints =

                                        distance between the checkpoints
                               divided by
                                        time between the checkpoints.

Distance between the checkpoints =

                                 (mileage at B) minus (mileage at A)

                               =      (208)          -            (120)  =  88 miles .

Time between the checkpoints =

                                 (time at B) minus (time at A)

                               =   (3:00 PM)  -  (1:00 PM)  =  2 hours .

Average speed between the checkpoints  = 

                                                                     (88 miles) / (2 hours)

                                                                   =         44 miles per hour .