Given:
a.) A cashier worked an 8-hour day and earned $58.00.
To be able to determine how much do the cashier earns per hour, we will be using the following equation:

This equation means that to be able to determine the cashier's earning per hour, we divide his/her earnings by the number of hours he/she worked.
We get,


Therefore, the cashier is earning $7.25 per hour.