To find how much you make in 4.5 hours, we can first calculate your hourly rate and then multiply it by 4.5 hours.

1. Hourly Rate: $\text{Hourly Rate} = \frac{\text{Total Earnings}}{\text{Total Hours Worked}} = \frac{28.50}{3} = 9.50$

So, you earn $9.50 per hour.

2. Earnings for 4.5 Hours: $\text{Earnings for 4.5 hours} = 9.50 \times 4.5 = 42.75$

Therefore, you would make $42.75 in 4.5 hours.

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Would you like further details or have any questions on this?

Here are some related questions:

1. How do you calculate earnings for different rates of pay (like overtime)?
2. How can you convert an hourly wage to an annual salary?
3. What’s the difference between gross and net income when calculating earnings?
4. How do you calculate pay if you're paid for part of an hour (e.g., 15 minutes)?
5. What are some tips to increase hourly earnings?

Tip: To track your earnings accurately, keep a log of hours worked and total earnings each day. It helps you understand your income patterns over time.