Final answer:
Bob's average velocity is calculated by dividing the total displacement (250 meters) by the time interval (8.6 seconds), resulting in an average velocity of approximately 29.07 m/s.
Step-by-step explanation:
To calculate Bob's average velocity during the time he is driving, we use the formula for average velocity (average velocity = total displacement / time interval). In this case, the displacement is given as 250 meters and the time interval is 8.6 seconds. Therefore, the average velocity would be:
average velocity = 250 m / 8.6 s ≈ 29.07 m/s
So, Bob's average velocity while driving is approximately 29.07 meters per second (m/s).