Final answer:
The marginal cost of turning the paper in on time is D) $10.
Step-by-step explanation:
The marginal cost of turning the paper in on time is $10.
First, let's calculate the cost of turning the paper in one day late. The penalty for a late submission is 10% of the final grade, which means a deduction of 0.10 * 100 = 10 points. Assuming your paper is worth 100 points, that would be a deduction of 10 points.
Now, let's calculate the cost of taking the day off work. Since you would lose a day of wages, which is $90, the marginal cost of turning the paper in on time is $10 (90 - 10 = 10).