Final answer:
Acceleration is the change in velocity divided by the time taken for that change. Without knowing the time, the acceleration cannot be calculated.
Step-by-step explanation:
Acceleration is defined as the change in velocity divided by the time taken for that change to occur. In this case, Justin Case's bike goes from an initial velocity of 6.6 m/s to a final velocity of 14 m/s in a certain amount of time. To find the acceleration, we can use the formula: Acceleration = (Final Velocity - Initial Velocity) / Time. Substituting the given values, we have Acceleration = (14 m/s - 6.6 m/s) / Time. Unfortunately, the given time is not provided. Therefore, it is not possible to calculate the acceleration without knowing the time it took for the change in velocity to occur