Answer:
The answer is 2.6 miles.
Explanation:
In order to determine the answer, we have to understand the situation.
We have the length of the complete trail from the beginning to the top of the canyon. If we measure the distance from the top to Jake, we just have to subtract the distance that Jake hikes by the complete distance.
When Jake stops for lunch, he will walk 1.6 miles.
The total distance is 4.2 miles.
Subtracting this value to the total distance:

Finally, the remain distance from the top to Jake is 2.6 miles.