The average speed of a car decreased by 3 miles per hour every successive 8-minutes interval. If the car traveled 4.4 miles in the sixth 8-minute interval, what was the average speed of the car, in miles per hour, in the first 8 minute interval? Choose the correct option:  A) 35  B) 40  C) 48  D) 51  E) 54
(4.4 miles / 8 minutes)*60 minutes/hour = 33 mph   Let x be the original speed.   x - 5(3) = 33   x = 48 mph   The answer is 48.
<result>C</result>
The average speed of a car decreased by 3 miles per hour every successive 8-minutes interval. If the car traveled 4.4 miles in the sixth 8-minute interval, what was the average speed of the car, in miles per hour, in the first 8 minute interval?