Final answer:
Nikko runs 18 miles each week (6 miles × 3 days). To run 198 miles, it will take him 11 weeks (198 miles ÷ 18 miles/week).
Step-by-step explanation:
The student is inquiring about how many weeks it will take for Nikko to run a total of 198 miles, given that he runs 6 miles a day and 3 days a week.
The hidden question that must be answered first is "How many miles does Nikko run in a week?" Since Nikko runs 6 miles a day for 3 days, he runs 6 miles × 3 days = 18 miles each week.
Now, to find out how many weeks it will take him to run 198 miles, we divide the total miles by the number of miles he runs each week. So, it's 198 miles ÷ 18 miles/week = 11 weeks.
Therefore, it will take Nikko 11 weeks to run 198 miles.