Answer:
The actual distance of Matt's trip is 80 miles.
Explanation:
Since we are given the scale 1in : 20 miles we know that each inch of Matt's trip on the map equals 20 miles, therefore we just have to multiply the length of the trip on the map given inches by 20. And so we get...
4 x 20 = 80
Therefore the actual distance of Matt's trip is 80 miles.