数学题,请英文好的进来解答一下,多谢
1.)$10000isinvestedat5.6%p.ainterestcompoundedmonthly.
(1)Howmuchisintheaccountafter
(a)6months
(b)3years
(2)Howlongwouldittakefortheinvestmenttodouble?
(3)Skeththemodelshowingallinformationaboveonyourgraph.
2).Asingerwasgivena15yearcontractin1980.Shewouldreceive$1000000eachyearfor15yearsbeginningtoday1January1981andsoforth.Thecaaountwasearning6%P.a.compoundingannually.
(1)Ifnowithdrawalsweremadeonthisaccounthowmuchwouldbeintheaccouton
(a)31December1980
(b)31December1981
(2)Usetheorygiveninlecturetoderiveaformulafortheamountofmoneyintheaccounton31December1994(Youmustusethesumofgeometricseriestoderiveaformulafortheamountinaccountinthwaccountafternyearsandhencefindtheammountintheaccounton31December1994)
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