1. A car travels 80 mi at a speed of 55mi/h. It encounters traffic and only travels at a speed of 15mi/h for a distance of 5mi.
2. A horse travels at 19m to left for 8.6s, and then turns around and travels 12m to the right for 18.4s.
a) What are the horse's two instantaneous speeds?
b) What are the horse's two instantaneous velocities?
c) What is the horse's average speed?
d) What is the horse's average velocity?