Final answer:
To determine the average tax rate for Terri Simmons with a taxable income of $189,000, specific details about the tax brackets above $36,900 are required. Without this information, it's not possible to provide an exact answer to the question.
Step-by-step explanation:
The question asks for the average tax rate for a single person with $189,000 in taxable income. To calculate the average tax rate, we would need to know the total amount of tax paid and then divide that by the taxable income. Unfortunately, without specific tax bracket information for incomes above $36,900 we cannot provide an accurate average tax rate for an income of $189,000. Typically, the tax system works in a progressive manner, meaning higher incomes fall into higher tax brackets with higher marginal tax rates, but the rate paid on all of the income is not the same as the marginal tax rate.
To illustrate, with the given tax brackets, a person earning $35,000 would be in the 15% marginal tax bracket since their income exceeds $9,075 but does not exceed $36,900. For Terri Simmons with an income of $189,000, her margin rate would be higher, likely exceeding the 25% bracket, but without further details, we cannot specify which marginal bracket above 25% she falls into or calculate her average tax rate accurately.