If the couples rest the same amount every hour, and you know that they rest for 25minutes in 5 hours, you can use cross multiplication to determine the amount of time they will rest in 8 hours:
5hours____25minutes
8hours____x minutes:
[tex]\frac{25}{5}=\frac{x}{8}[/tex]This means that the rate of the resting time and the hours is the same. To determine how much x is, multiply 25/5 by 8
[tex]\begin{gathered} 8(\frac{25}{5})=x \\ x=40 \end{gathered}[/tex]After 8 hours the couple will dance for 40 minutes.
