To compare the time spent on homework by Marco and Maribella, we can calculate the average hours of homework per day for both.
Marco’s Homework:
- For 3 days: 3.25 hours ÷ 3 days = 1.0833 hours/day
- For 9 days: 9.75 hours ÷ 9 days = 1.0833 hours/day
- For 12 days: 13.0 hours ÷ 12 days = 1.0833 hours/day
- For 30 days: 32.5 hours ÷ 30 days = 1.0833 hours/day
Average for Marco: 1.0833 hours/day
Maribella’s Homework:
- For 4 days: 4.2 hours ÷ 4 days = 1.05 hours/day
- For 8 days: 8.4 hours ÷ 8 days = 1.05 hours/day
- For 20 days: 21.0 hours ÷ 20 days = 1.05 hours/day
- For 28 days: 29.4 hours ÷ 28 days = 1.05 hours/day
Average for Maribella: 1.05 hours/day
Now, comparing the average hours per day:
- Marco: 1.0833 hours/day
- Maribella: 1.05 hours/day
Since 1.0833 > 1.05, it indicates that Marco spends more time on homework per night compared to Maribella.
Therefore, the correct statement is: "Maribella spends less time on homework per night."