Final answer:
Heather would round her earnings of $8265.53 to the nearest dollar, resulting in $8266.00 to be reported on the Illinois state tax form.
The correct option is 4.
Step-by-step explanation:
When rounding numbers to the nearest dollar on the Illinois state tax form, Heather's part-time job income of $8265.53 would be rounded to the nearest whole number. Since the cents value, .53, is greater than or equal to .50, the amount needs to be rounded up to the next whole dollar.
Therefore, Heather would enter $8266.00 on the form for her earnings. This is because rounding is done by increasing the last remaining digit (after dropping the cents) by one if the first dropped digit is 5 or more, which is the case here (53).
The correct option is 4.