[計量] 問三題計量
Given Principal amount P, rate of interest was r and the amount increase from 1990 to 1995 and 1995 to 2000 each time by r% so the total amount was 7/5p at the end of 2yrs. 跟20比大小 答案是20比較大
What is the probability that particular year between 1987 abd 1992 has 53 sunday 答案是 2/7
There was a $25 discount on every purchase of $75 there was a 10% charge on shipping which was added before the discount and 20% sales tax after the discount was added. If John paid total $300. What was the original amount of purchase if no sales tax was added per $75
答案是240
拜託幫忙解題了^_^..
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