Marco’s Homework

Question

Number of days

3

9

12

30
Number of hours

3.25

9.75

13.0

32.5

Maribella’s Homework

Number of hours

4

8

20

28
Number of hours

4.2

8.4

21.0

29.4
Based on the tables showing the hours of homework done by Marco and Maribella for different periods of time, which statement is correct? Marco spends less time on homework per night.

Marco and Maribella spend equal time doing their homework.

Maribella spend less time on homework per night.

there’s not enough information to tell who spends less time doing their homework.

Answer 1

To compare the amount of homework time per night for Marco and Maribella, we can calculate the average number of hours spent on homework per day for each person based on the provided data.

Marco's Homework:

1. For 3 days: 3.25 hours
   • Average: 3.25 / 3 = 1.0833 hours/day
2. For 9 days: 9.75 hours
   • Average: 9.75 / 9 = 1.0833 hours/day
3. For 12 days: 13.0 hours
   • Average: 13.0 / 12 = 1.0833 hours/day
4. For 30 days: 32.5 hours
   • Average: 32.5 / 30 = 1.0833 hours/day

Average per day for Marco: 1.0833 hours/day

Maribella's Homework:

1. For 4 days: 4.0 hours
   • Average: 4.0 / 4 = 1.0 hours/day
2. For 8 days: 8.0 hours
   • Average: 8.0 / 8 = 1.0 hours/day
3. For 20 days: 20.0 hours
   • Average: 20.0 / 20 = 1.0 hours/day
4. For 28 days: 29.4 hours
   • Average: 29.4 / 28 ≈ 1.05 hours/day

Average per day for Maribella: (4 + 8 + 20 + 29.4) / (4 + 8 + 20 + 28) = 61.4 / 60 ≈ 1.0233 hours/day

Conclusion:

• Marco spends approximately 1.0833 hours per day.
• Maribella spends approximately 1.0233 hours per day.

Since 1.0833 > 1.0233, Marco spends more time on homework per night than Maribella.

Thus, the correct statement would be: Maribella spends less time on homework per night.