Answer:
The actual distance is 16 miles.
Explanation:
In order to find this, create a proportion. On the left you should put the scale factor. On the right you should put the markers.
2.5in/10mi = 4.5in/xmi
Now cross multiply to solve.
10mi * 4.5in = 2.5in * xmi
45 = 2.5x
16 mi = x