作者leporidae (leporidae)
看板GRE
標題[計量] 問一題數學
時間Mon Feb 11 19:53:37 2013
來欣題庫Q4一題一直無法參透>"< 請板上高手幫忙解答了 謝謝!!!
A certain money market account that had a balance of $48000 during
all of last month earned $360 in interest for the month.
At what simple annual interest rate did the account earn interest last month?
答案是 9% 但是我一直算不出來...
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1F：推 liongo :他說他有48000元，然後上個月他的利息算出來是360 02/11 20:22
2F：→ liongo :他要問你他的年利率，所以你把360*12個月=4320元 02/11 20:22
3F：→ liongo :4320/本金48000=0.09 就是他的年利率了 02/11 20:23
4F：→ leporidae :瞭解了!! 感謝樓上詳細解說^^ 02/11 20:51
5F：推 liongo :不客氣~ 02/11 22:23