求教700难题

christinashao · 发表于 2010-11-9 23:11:47

before being simplified, the instructions for computing income tax in country r were to add 2 percent of one's annual income to the average of 100 units of country r's currency and 1percent of one's annual income. which of the following represents simplified formula for computing the income tax,in country r's currency,for a person in that country whose annual income is i?
1 50+i/200
2 50+3i/100
3 50+i/40
4 100+i/50
5 100+3i/100
谢谢大家帮忙看看吧~~~看不懂题啊

sdcar2010 · 发表于 2010-11-9 23:27:00

2% x i + 0.5 x ( 100 + 1% x i ) = 2.5% x i + 50

Answer C

sdcar2010 · 发表于 2010-11-9 23:28:00

Add X to the average of ( Y and Z )

christinashao · 发表于 2010-11-14 11:18:31

对啊非常感谢~~~

求教700难题

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