Final answer:
Dylan will walk a total distance of 3.225 miles in 129 minutes, based on his rate of 1/2 mile every 20 minutes.
Step-by-step explanation:
To determine how far Dylan will walk in 129 minutes, given that he walked 1/2 mile in 20 minutes, we can set up a ratio to compare the distances:
- First, find the rate of walking by dividing the distance by the time: 1/2 mile / 20 minutes = 1/40 mile per minute.
- Next, multiply this rate by the total time to find the total distance: 1/40 mile per minute * 129 minutes = 3.225 miles.
So, Dylan will walk a total distance of 3.225 miles in 129 minutes.