Question

The amount of water in a river changes by negative 3 5/8 ft in 4 1/2 hours. What is the average change in the River water level each hour?

Answer 1

we have:

3 5/8 ft ----> 4 1/2 hours

x ft ----------> 1 hour

`\begin{gathered} 3(5)/(8)*1=x*4(1)/(2) \\ (29)/(8)=(9)/(2)x \\ (29)/(8)*(2)/(9)=(9)/(2)x*(2)/(9) \\ x=(29)/(36) \end{gathered}`

answer: 29/36 is the average change in the River water level each hour