You and a companion are driving a twisty stretch Time (s) Velocity (ft/s) Time (s) Velocity (ft/s of road in a car with a speedometer but no 0 0 70 41 odometer. To find out how long this road is, you 10 42 80 14 record the car's velocity at 10-second intervals. 20 45 90 24 30 19 100 24 40 50 110 37 50 31 120 16 60 50 a. Estimate the length of the road using left-endpoint values