Final answer:
To find the total number of water stations along a marathon route, you divide the length of the marathon by the distance between water stations, which gives you approximately 20 stations.
Step-by-step explanation:
The student is asking about the total number of water stations along a marathon route that is 26.2 miles long with stations every 1 31/100 miles. To find the total number of stations, you divide the total length of the marathon by the distance between water stations. Therefore, the correct expression is Option 3: 26.2 / 1 31/100.
We can calculate this by converting 1 31/100 miles to a decimal, which is 1.31 miles. Then, we divide 26.2 by 1.31 to get the total number of stations:
26.2 ÷ 1.31 ≈ 20
This means there are approximately 20 water stations along the marathon route, assuming the last station is at the finish line. If not, we would have to add one more station to account for the starting point, making it 21.