High School

Althea volunteers in the school library for 2 1/4 hours on Mondays, Wednesdays, and Fridays. On Tuesdays and Thursdays, she volunteers for 1 3/4 hours. Althea thinks she volunteers more than 10 hours a week. How many hours does she volunteer each week?

Answer :

Althea volunteers 10.25 hours a week.

Given that Althea volunteers in the school library for 2 1/4 hours on Mondays, Wednesdays, and Fridays.

She volunteers 2 1/4 hours a day.

First we convert the improper fraction 2 1/4 to a proper fraction.

2 1/4 = 9/4

So by unitary method for three days the number of hours she volunteer:

3 × 9/4 = 27/4

Also, she volunteers for 1 3/4 hours on Tuesday and Thursday.

She volunteers 1 3/4 hours a day.

First we convert the improper fraction 1 3/4 to a proper fraction.

1 3/4 = 7/4

So by unitary method for two days the number of hours she volunteer:

2 × 7/4 = 14/4

So, the total number of hours Althea volunteers for a week,

27/4 + 14/4

= 41/4

= 10.25 hours

Learn more about fraction here:

https://brainly.com/question/8969674

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