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[求助]请教一道prep数学
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(arithmetic mean of 100 units of country R's currency and 1 percent of one's annual income. Which of the following representsthe simplified formula for computing the income tax, in countryR's currency, for a person in that country whose annual income is I?
50+I/200
50+3I/100
50+I/40
100+I/50
100+3I/100
多谢啊。。答案是第三个。。谁给解释下。。看不大懂额。。那个50 100哪来的啊。。
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发表于 2009-10-19 21:00:00
