In a study investigating the effect of car speed on accident severity, the vehicle speed at impact was remrded for 5,000 fatal accidents. For these accidents, the mean speed was 42 mph and the standard deviation was 13 mph. A histogram revealed that the vehicle speed distribution was mound shaped and approximately symmetric. (Use the Empirical Rule.) (3) Approximately what percentage of vehicle speeds were between 29 and 55 mph? approximately % (b) Approximately what percentage of vehicle speeds exceeded 55 mph? (Round your answer to the nearest whole number.) approximately E %