To determine the distance Cori drove, we can use the formula:
Distance = Speed x Time
Given that Cori drove for 15 minutes at a speed of 40 miles per hour, we need to convert the time from minutes to hours:
15 minutes = 15/60 hours = 0.25 hours
Now we can calculate the distance:
Distance = 40 miles per hour x 0.25 hours = 10 miles
Therefore, Cori drove a distance of 10 miles.