2017年8月25日SAT官方每日一题---数学选择.

　　下面是2012年8月25日的SAT官方每日一题的内容，是关于数学方面的，题型是选择。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。下面我们就一起来看一下这个SAT官方每日一题吧。

　　SAT官方每日一题之数学---选择：

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　　Mathematics > Standard Multiple Choice

　　Read the following SAT test question and then click on a button to select your answer.

　　The bar graph above shows the number of people in attendance at each of the four meetings of the Maple Street Block Association that were held in 2011. Only members of the Block Association can attend the meetings, and no members joined or lt the Block Association during 2011. Based on the bar graph, what is the least number of members the Maple Street Block Association could have had in 2011?

　　(A) 61

　　(B) 65

　　(C) 67

　　(D) 72

　　(E) 268

　　The correct answer is D

　　Explanation

　　The highest attendance was at the spring 2011 meeting, which had 72 people attending. Since only members can attend the meetings, these 72 people must have been members of the Maple Street Block Association; thus, there must have been at least 72 members of the Block Association. If the 65, 61 and 70 people who attended the winter, summer and autumn meetings, respectively, were all among the 72 people who attended the spring meeting, then the Block Association could have had as few as 72 members in all. Therore, based on the bar graph, the least number of members the Maple Street Block Association could have had in 2011 is 72.

　　下面是一道和SAT官方每日一题相似的题目，供大家练习：

　　A manager estimates that if the company charges p dollars for their new product, where 0 less than or equal to p less than or equal to 200, then the revenue from the product will be function r of p = 2000 times p minus (10 times p^2) dollars each week. According to this model, for which of the following values of p would the company’s weekly revenue for the product be the greatest?

　　Answer Choices

　　(A) 10

　　(B) 20

　　(C) 50

　　(D) 100

　　(E) 200

　　The correct answer is D

　　Explanation

　　The graph of function r of p = 2000 times p minus (10 times p^2) is a downward-facing parabola that intersects the x-axis at 0 and at 200. Parabolas are symmetric, so the maximum value of r occurs at 100, which is halfway between 0 and 200. (When p = 100, the value of r is function r of 100 = (2000 times (100)) minus (10 times (100^2)) = 100000.)

　　以上就是关于2012年8月25日SAT官方每日一题中数学部分的详细内容，包括了题目和选项以及答案，后面附有一道相关的练习题。大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。

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