Final answer:
The acceleration of the jet is 20 miles per hour per second.
Step-by-step explanation:
The acceleration of the jet can be calculated by dividing the change in velocity by the time taken. In this case, the change in velocity is from 0 mph to 100 mph, which is 100 mph. The time taken is 5 seconds. So, the acceleration is 100 mph / 5 s = 20 mph/s.
Therefore, the acceleration of the jet is 20 miles per hour per second.