We can use the formula d = rt, where d is distance, r is rate, and t is time to find the distance that Jim travels.
Given that Jim runs for 15 minutes, which is 1/4 of an hour. Also, his rate is 4 miles per hour.
Therefore, we can write:
d = rt
d = 4 miles/hour * (1/4) hour
d = 1 mile
So, Jim runs 1 mile every morning.