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For 4 weeks, William volunteered as a helper for swimming classes. The first week, he volunteered for 8 hours. He volunteered for 12 hours in the second week, and another 12 hours in the third week. The fourth week, he volunteered for 9 hours. For how many hours did he volunteer per week, on average? (write a sentence answer)​

Sagot :

Answer:

He volunteered 10 hrs 15 min on average.

Step-by-step explanation:

The first week: 8 hrs

The second week: 12 hrs

The third week: 12 hrs

The fourth week: 9 hrs

8 + 12 + 12 + 9 = 41 hrs total

41 hours/4 weeks = 10.25 hrs (10 hrs 15 min)

Answer: 10.25 hours/week (On average, William volunteered 10.25 hours per week during these four weeks)

Step-by-step explanation:

To find an average, you need to add up each entity:

8+12+12+9=41

After that, you divide that number by n (the number of weeks)

41/4=10.25 hours

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