Answer:
Olivia will run 40 miles in 8 hours if she maintains the same rate.
Explanation:
If Olivia runs 15 miles in 3 hours at a constant rate, we can find her rate of running:
Rate = Distance / Time
Rate = 15 miles / 3 hours
Rate = 5 miles per hour
Now, we can use this rate to calculate how many miles Olivia will run in 8 hours:
Distance = Rate × Time
Distance = 5 miles/hour × 8 hours
Distance = 40 miles
Olivia will run 40 miles in 8 hours if she maintains the same rate.