Answer:0.46 m/s^2.
Step-by-step explanation:
The acceleration of the dog can be calculated by using the formula:
acceleration = (final velocity - initial velocity) / time
The initial velocity of the dog was 3 m/s, the final velocity was 9 m/s, and the time was 13 seconds.
acceleration = (9 m/s - 3 m/s) / 13 s = 0.46 m/s^2
Therefore, the acceleration of the dog was 0.46 m/s^2.