1 A car traveling at 35.3 miles/hour stops in 4.3 seconds. What is the average acceleration?

2 A car completes a complete circle of radius 3.1 miles at a speed of 51 miles per hour. How many minutes does it take?

3 A car traveling at 21.3 mph increases its speed to 24.2 mph in 1.4seconds. What is the average acceleration?

4 Mr. Smith is backing his car at a speed of 3.28 mph when he hits a cornfield (seed corn). In the course of 1.92 seconds he stops, puts his car in forward drive, and exits the field at a speed of 5.66 mph. What was the magnitude ( absolute value) of his acceleration?