Explanation:
What to find? Family's rebate at the end of the year
Given parameters
Annual cash back rebate = 2%
Total amount spent on gasoline purchases = $5850
To calculate the cash-back rebate at the end of the year, we will need to apply the below formula
Let the annual cash-back rebate be x
Let the total amount spent on gasoline purchase be y
The cash-back rebate = x% * y
![\begin{gathered} \text{The cash-back rebate = 2\% }\cdot\text{ 5850} \\ \text{The cash-back rebate = }(2)/(100)\cdot\text{ 5850} \\ \text{The cash-back rebate = 0.02 }\cdot\text{ 5850} \\ \text{The cash-back rebate = \$117} \\ \text{Hence, the cash-back rebate at the end of the year is \$117} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/eyrbb5wiom8mhmm5qrwbwl93ilw4ehkn9g.png)