Answer:
181 days.
Explanation:
The length of appalachian trail = 2,175 miles
A hiker hikes average each day = 12 miles
We will divide total distance by the distance covered each day.
It will take her to hike the length of the trail =

= 181.25 ≈ 181 days
It will take 181 days to take her to hike the length of the trail.