[計量] 問一題數學
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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