?????????????? "how much number av yeers" ???????????? . . . mi ges is this hav sumthun tu du with kompound interest . . . from 80 milyun tu 160 milyun =yu dubel the munee . . . 16% interest . . . ??????? how oft kompound ???????? if 1 per yeer: 2=(1.16)^yeers . . . . log(2)=yeers*log(1.16) . . . yeers=log(2) / log(1.16) . . . =0.301029995 / 0.064457989 . . . =4.670173545128751 yeers or bout 4.7 yeers