Before being simplified,the instructions fro computing income tax in Country R were to add 2percent 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 represents the simplified formula for computing the income tax,in Country R's currency, for a person in that country whose annual income is I? A. 50+I/200 B.50+3I/100 C.50+I/40 D.100+I/50 E.100+3I/100 The answer is C...
还有一道: If x^4+y^4=100,the greatest possible value of x is between A 0 and 3 B 3 and 6 C 6 and 9 D 9 and 12 E 12 and 15 The answer is B.....I chose A