Final answer:
Lily ran 4.5 miles, which is three times the distance of Nero's run of 1 1/2 miles.
Step-by-step explanation:
The question asks us to calculate the distance Lily ran, knowing that she ran three times the distance Nero ran. Nero ran 1 1/2 miles. To find the distance Lily ran, we multiply Nero's distance by 3.
Since 1 1/2 miles can be also written as 1.5 miles, Lily ran 3 times 1.5 miles, which equals 4.5 miles. So Lily ran 4.5 miles.