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10-73.
average speed = total distance / total time
When t = 0, the Icemobile is at (600, 1250).
When t = 30, the Icemobile is at (600, 900).
Find the total distance, or distance between the two points,and the total time.
total distance = √(600 − 600)² + (900 − 1250)² = 350 ft
total time = 30 − 0 = 30 seconds
average speed = 350/30 feet per second
Now try parts (b) and (c).
b: 20 ft/sec
c: 17.68 ft/sec