at 10:17 a.m., you pass a police car at 55mph that is stopped on the freeway. you pass a second police car at 55mph at 10:53 a.m., which is located 39 miles from the first police car. if the speed limit is 60mph, can the police cite you for speeding? find your average velocity from the 10:17 a.m. to 10:53 p.m.