amily began a trip of 448 miles at 7 A.M. They arrived at their final destination at 4:30 P.M. If they took three 20-minute breaks and took a half hour for lunch, what was their average rate? Round to the nearest tenth if necessary.  Since total distance = 448 miles and total time taken = 9.5 - 1 - 0.5 = 8 hours Average rate = 448 / 8 = 56 mph