Table C: Average Speeds for Lower Racetrack Elapsed Time
Time (Initial)
(s)
Time (Final)
(s)
Average Speed
(m/s)
0.74
1st of the Track
2.07
2nd %% of the Track
1.09
1.40
3rd of the Track
0.95
1.61
Final 44 of the Track
0.81
1.81

the answer is b ) square root of 5

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explanation:

the total distance traveled by the car is

30km + 49km = 79 km .