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He bought a 1-year,$1o,ooo certificate of deposit that paid

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He bought a 1-year,$1o,ooo certificate of deposit that paid interest at an annual rate of 8 percent compounded semiannually.What was the total amount of interest paid on this certificate at maturity?
他购买了一张面值10000的存款单,年利率8%,每半年支付一次.当该存款单到期时总利息是多少?
年利率为8%,半年名义利率为4%,第一个半年利息为10000*4%=400,第二个半年为10400*4%=416,总利息816