To determine your earnings per hour, you can use the formula for hourly wage, which is total earnings divided by the total hours worked.
In this case, you earned $280.00 for working 40 hours.
So, your earnings per hour (y) would be calculated as:
\[ y = \frac{\text{Total Earnings}}{\text{Total Hours}} = \frac{280.00}{40} \]
Calculating that gives:
\[ y = 7.00 \]
Therefore, your earnings per hour is $7.00.
So the correct response is:
$7.00