Arlene is single and ahas taxable income of $34000. her tax liability is currently $4636. she has the opportunity to earn an additional $6000 this year. her tax liability will grow to $5771 if she receives the additional income. what is arlene's marginal tax rate for the additional $6000?

Bruce matthews played football for the tennessee titans. as part of his contract, he agreed to submit any dispute to arbitra- tion. he also agreed that tennessee law would determine all matters related to workers' compensation. after matthews retired, he filed a workers' compensation claim in california. the arbitrator ruled that matthews could pursue his claim in california but only under tennessee law. should this award be set aside?