Marco homework. Maribella's homework
Days. Hours. Days. Hours
3. 3.25. 4. 4.2
9. 9.75. 8. 8.4
12. 13.0. 20. 21.0
30. 32.5. 28. 29.4
Based on the tables showing the hours of homework done my Marco and Maribella for different periods of time, which statement is correct
A. Maribella spends less time on homework per night
B. There is not enough information to tell who spends less time working their homework
C. Marco and Maribella spends equal time doing their homework
D. Marco spends less time on homework per night
A. Maribella spends less time on homework per night
To determine which statement is correct, we need to compare the average time per night spent on homework for Marco and Maribella.
To find the average for each person, we add up the total hours and divide by the number of days.
For Marco:
Total hours = 3.25 + 9.75 + 13.0 + 32.5 = 58.5
Total days = 3 + 9 + 12 + 30 = 54
Average time per night = Total hours / Total days = 58.5 / 54 ≈ 1.0833 hours
For Maribella:
Total hours = 4.2 + 8.4 + 21.0 + 29.4 = 63.0
Total days = 4 + 8 + 20 + 28 = 60
Average time per night = Total hours / Total days = 63.0 / 60 = 1.05 hours
Comparing the averages, we see that Marco spends approximately 1.0833 hours per night on homework, while Maribella spends approximately 1.05 hours per night.
Since Marco spends less time on homework per night, the correct statement is D. Marco spends less time on homework per night.
To determine who spends less time on homework per night, we need to compare the average number of hours each person spends doing homework.
Let's calculate the average number of hours per night for Marco:
For Marco:
- For 3 days, the total hours spent is 3.25 + 9.75 + 13.0 = 26.0 hours
- The average number of hours per night for Marco is 26.0 hours / 3 days = 8.67 hours
For Maribella:
- For 4 days, the total hours spent is 4.2 + 8.4 + 21.0 = 33.6 hours
- The average number of hours per night for Maribella is 33.6 hours / 4 days = 8.4 hours
Comparing the averages, we can see that Marco spends less time on homework per night, as his average is 8.67 hours while Maribella's average is 8.4 hours.
Therefore, the correct statement is:
D. Marco spends less time on homework per night.