Re: [計量] 數學圖表題

看板GRE (GRE入學考試)作者f54512時間18年前 (2007/11/18 22:34)推噓0(0推 0噓 0→)

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※ 引述《hsingchih (請賜我GRE高分吧!!)》之銘言： : 圖表1 Average daily circulation for newspaper X : 1940 100(Thousands of Newspapers) : 1950 470 : 1960 650 : 1970 440 : 1980 180 : 圖表2 Total yearly advertising revenue for newspaper X : 1940 7(Millions of Dollars) : 1950 25 : 1960 52 : 1970 38 : 1980 36 : 圖表3 Averafe number of pages per newspaper for newspapter X : 1940 30 : 1950 55 : 1960 88 : 1970 70 : 1980 74 : 題目1: In 1950, if the printing cost per newspaper was $0.05, what would : have been the total cost of printing the average daily circulation? : (A) $32,500 : (B) $26,000 : (C) $23,500 : (D) $22,000 : (E) $2,600 : Ans: C total cost = 470 * 1000 * 0.05 = 23500 : 題目2: Which of the following statements can be inferred form the date? : I. The greatest increase in total yearly advertising revenue over : any 10-year period shown was $27 million. : II. In each of the 10-year periods shown in which yearly advertising : revenue decreased, average daily circulation also decreased. : III. From 1970 to 1980 the average number of pages per newspaper : increased by 10. : (A) I only : (B) II only : (C) III only : (D) I and II : (E) II and III : Ans: D : 不懂為什麼 I 也是對的. I 最多的increase發生在 1950(52)-1960(25)年間 52-25 = 27 million : 題目 d=5.03894 and (d) is the decimal expression for d rounded to the : nearest thousandth : Column A The number of decimal Places where d and (d) differ : Column B 4 : Ans: B : 看不懂題目的意思... (d)為5.03894四捨五入到千分位 d = 5.039 column A應該是說有幾個地方不同應該是3個地方不同(這邊不確定) : 題目 Equilateral triangle PQR is formed by joining centers P,Q,and R of : the circles. Each pair of circles has exactly one point in common. : Column A The perimeter of triangle PQR : Column B THe circumference of the circle with center Q : Ans: B PQR為正三角形的三個頂點也是三個圓的圓心每兩個圓只交於一點(圓外切) 所以三角形邊長 = 2r (r是圓半徑，三個圓都一樣) Column A 6r Column B 2 * pi * r B > A -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 220.135.94.1