A photographer enlarges a picture to hang on a wall. The original picture is 5 inches long and 4 wide. The new picture is 22 inches long and 17.6 inches wide. What scale factor did the photographer use?

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.