omework Saved Help Save & Exit Submit You received no credit for this question in the previous attempt Check my work View previous attempt Problem 1-35 (LO 1-3) Chuck, a single taxpayer, earns $75,000 in taxable income and $10,000 in interest from an investment in City of Heflin bonds. (Use the US. tax rate schedule.) (Do not round intermediate calculations. Round your answers to 2 decimal places.) a. If Chuck earns an additional $40,000 of taxable income, what is his marginal tax rate on this income? 27.451 % b. What is his marginal rate if, instead, he had $40,000 of additional deductions? 25.00