Systems of Measurement: example 7.46

To convert weeks into minutes, we will convert weeks to days, days to hours, and then hours to minutes. To do this, we will multiply by conversion factors of $1.$

	$\text{9 weeks}$
Write 1 as $\frac{7\text{days}}{1\text{week}},\frac{24\text{hours}}{1\text{day}},\frac{60\text{minutes}}{1\text{hour}}$.
Cancel common units.
Multiply.	$\frac{9·7·24·60\text{min}}{1·1·1·1}=90,720\text{min}$
	Juliet will be away for 90,720 minutes.