※ 引述《Anlorus ()》之铭言： : 真是很谢谢大家的帮忙 : 以下几题，得请教大家了 : 1.For a certain farm, soybean production increased : by 25 percent from year X to year Y, : and the selling price of soybeans decreased by 25 percent : from year X to year Y. If the entire soybean production was sold each year, : approximately what was the percent change in the revenues : from the sale of the soybeans from year X to year Y? : (A) 56% decrease : (B) 6% decrease : (C) No change : (D) 6% increase : (E) 56% increase : 答案为 B $ * (5/4) * (3/4) =$ * 15/16 少 1/16 约　6% : 3.David and Michael charged Mr. Jimenez $3,000 to remodel his basement. : To complete the project, David worked 4 days alone, : Michael worked 1 day alone, and they worked 10 days together. : If they each received the same amount of money for each day that they worked, : how much of the $3,000 did David receive? : (A) $1,800 : (B) $1,750 : (C) $1,680 : (D) $1,575 : (E) $1,200 : 答案为 C X　*　(4+10) + X * (1+10) = 3000 X = 120 David = (4+10) *120 =1680 : 4.Workers at Companies X and Y are paid the same base hourly rate. : Workers at company X are paid 1.5 times the base hourly rate for : each hour worked per week in excess of the first 37, : while workers at Company Y are paid 1.5 times the base hourly rate : for each hour worked per week in excess of the first 40. : In a given week, how many hours must a Company X worker work in order to : receive the same pay as a company Y worker who works 46 hours? : (A) 46 : (B) 45 : (C) 44 : (D) 43 : (E) 42 : 答案为 B 设Hours为H (H-37)* 1.5$ + 37*$ = 6 *1.5 $ + 40*$ H =45 : 5. If the cube of n is 180 greater than the square of n, then n = : (A) 10 : (B) 9 : (C) 8 : (D) 7 : (E) 6 : 答案为 E n^3 - n^2 =180 n=6 : 6. A developer has land that has x feet of lake frontage. : The land is to be subdivided into lots, : each of which is to have either 80 feet or 100 feet of lake frontage. : If of the lots are to have 80 feet of frontage each and : the remaining 40 lots are to have 100 feet of frontage each, : what is the value of x? : (A) 400 : (B) 3,200 : (C) 3,700 : (D) 4,400 : (E) 4,760 : 答案为 D 这个是不是少打数字... : 再次谢谢大家！ : 呼～祝福明天要上场的大家，都能大顺利啊！！！ --

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