To find how much the employee will make in 18 hours, we first need to determine the hourly rate.
The employee earns $175 for 15 hours of work. So the hourly rate can be calculated as follows:
\[ \text{Hourly Rate} = \frac{\text{Total Earnings}}{\text{Total Hours}} = \frac{175 \text{ dollars}}{15 \text{ hours}} \approx 11.67 \text{ dollars/hour} \]
Now that we have the hourly rate, we can calculate the earnings for 18 hours:
\[ \text{Earnings for 18 hours} = \text{Hourly Rate} \times \text{Total Hours} = 11.67 \text{ dollars/hour} \times 18 \text{ hours} \approx 210 \text{ dollars} \]
Therefore, the employee will make approximately $210 in 18 hours.