Marc, a single taxpayer, earns $122,000 in taxable income and $3,800 in interest from an investment in city of birmingham bonds. using the u.s. tax rate schedule for year 2017, what is his current mar

Marc, a single taxpayer, earns $122,000 in taxable income and $3,800 in interest from an investment in city of birmingham bonds. using the u.s. tax rate schedule for year 2017, what is his current marginal tax rate? (tax rate schedules)