Answer:
13,200 feet
Explanation:
In one mile, there are 5,280 feet.
You're trying to find how many feet are in 2.5 miles, so you can set up a proportion.
X = the number of feet in 2.5 miles.
To find X, all you need to do is cross multiply.
So,
X = 5280 × 2.5 = 13,200 feet