Final answer:
The marginal tax rate for a corporation with an income level of $100,000 would be 34%. The average tax rate cannot be determined without more information.
Step-by-step explanation:
The marginal tax rate is the tax rate applied to the last dollar of income earned. In the case of a corporation with an income level of $100,000, we need to refer to the tax rate structure provided in the information given. According to the rate structure, there is a flat 34% tax rate on incomes from $335,000 to $10,000,000. Since the income level of $100,000 is below this range, the marginal tax rate would be 34%.
The average tax rate, on the other hand, is calculated by dividing the total tax paid by the total income. However, without information about the exact tax payments for different income levels, we cannot determine the average tax rate for a corporation with an income level of $100,000.