Answer: 6 cups
Step-by-step explanation:
From the question, we are informed that Charles is hiking a trail that is 12.6 miles long and that he will drink a cup of water after every 2.1 miles.
The number of cups of water that he should bring on the hike will be:
= Length of the trail / Number of miles used for every water drank
= 12.6 / 2.1
= 6
The answer is 6 cups
