1 Answer

Briefkasten · Answer 1 · 2023-09-14T06:29:40+0000

Since Mary worked 16 1/2 hours in 5 days

Then to find her average in a day, we will divide the total hours by the number of days.

$\text{Ave}=(16(1)/(2))/(5)$

We will change the mixed number 6 1/2 to an improper fraction

$\begin{gathered} \text{Ave}=((16*2+1)/(2))/(5) \\ \text{Ave}=((33)/(2))/(5) \\ \text{Ave}=(33)/(5*2) \\ \text{Ave}=(33)/(10) \end{gathered}$

Then her average is 33/10 hour per day

We can change it to a mixed number

$\text{Ave}\mathrm{}=3(3)/(10)$

Her average is 3 3/10 hours per day

Since 1 hour = 60 min, then change the fraction 3/10 to minutes

$(3)/(10)*60=3*6=18\min$

Then her average is 3 hours 18 min per day

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