Given data:
The total weight of the apples Jeff have W=45 pounds.
The amount Jeff earned for every 3/4 pound of apple is A=$4.50.
The expression for the given statement is,
![\begin{gathered} (3)/(4)\text{ pound =\$4.50} \\ 1\text{ pound =\$6} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ij0ecij2q3kfjtopvp3o3e7xkz3hwu9vge.png)
Multiple the above expression by 45 on both sides.
![\begin{gathered} 45(\text{ 1 pound)=45(\$6)} \\ 45\text{ pounds =\$270} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/bhn5ov563332c97tc5sgfceuz5rk4bzp4m.png)
Thus, the amount Jeff earned is $270.