To determine who spends less time doing homework per night, we can calculate the average number of hours spent per night for both Marco and Maribella.
Marco's Homework:
- For 3 days: 3.25 hours → \( \frac{3.25}{3} = 1.08 \) hours per day
- For 9 days: 9.75 hours → \( \frac{9.75}{9} = 1.08 \) hours per day
- For 12 days: 13.0 hours → \( \frac{13.0}{12} = 1.08 \) hours per day
- For 30 days: 32.5 hours → \( \frac{32.5}{30} = 1.08 \) hours per day
Marco spends an average of 1.08 hours per day on his homework.
Maribella's Homework:
- For 4 days: 4.2 hours → \( \frac{4.2}{4} = 1.05 \) hours per day
- For 8 days: 8.4 hours → \( \frac{8.4}{8} = 1.05 \) hours per day
- For 20 days: 21.0 hours → \( \frac{21.0}{20} = 1.05 \) hours per day
- For 28 days: 29.4 hours → \( \frac{29.4}{28} = 1.05 \) hours per day
Maribella spends an average of 1.05 hours per day on her homework.
Conclusion
Since Maribella spends less time on homework per night (1.05 hours) compared to Marco (1.08 hours), the correct statement is:
Maribella spends less time on homework per night.
1 answer