[nhữngcuá»™cphiãªulæ°u] [Cứu tinh vÅ© trụ] [ B��n Th] [dinh dưỡng vÃÂ] [V�̘I] [Đề thi 12] [TAROT Nh] [ón tinh ut lieu] [This year, Henry will save a certain amount of his income, and he will spend the rest. Next year, Henry will have no income, but for each dollar that he saves this year, he will have 1 r dollars available to spend. In terms of r, what fraction of his income should Henry save this year so that next] ["10.1093/jcde/qwaf117"]