Chapter 8, Problem 44SGR

To determine

To find: Lisa’s earning after 5 hours of babysittings.

Answer to Problem 44SGR

Lisa’s earning after 5 hours of babysitting is $42.5.

Explanation of Solution

Given information:

Lisa’s earnings vary directly with how many hours se babysits. If she earns $68 for 8 hours of babysitting.

Calculation:

Since, since her earning is vary directly with how many hours she babysits. Therefore,

  $\begin{array}{l}\frac{8}{68}=\frac{5}{y}\text{ (Direct variation)}\\ 8y=5\cdot 68\text{ (Cross multiply)}\\ 8y=340\text{ (Simplify)}\\ y=\frac{340}{8}\text{ (Divide each sides by 18)}\\ y=42.5\end{array}$

Hence,

Lisa’s earning after 5 hours of babysitting is $42.5.