Question

A pool is leaking water at a constant rate. The amount of water inside the pool changes by -1 1/4What is the total change of the water in the pool after 2 1/2 hours?

Answer 1

We have the following:

The first thing is to pass the mixed numbers to fractional numbers, like this

`\begin{gathered} -1(1)/(4)=-(4+1)/(4)=-(5)/(4) \\ 2(1)/(2)=(4+1)/(2)=(5)/(2) \end{gathered}`

now, to know the change, we must multiply the exchange rate by the time elapsed thus

`-(5)/(4)\cdot(5)/(2)=-(25)/(8)=-3(1)/(8)`

The total change is -3 1/8 or -25/8