2017年4月24日 sat数学官方每日一题.

　　马上就要参加sat考试了，童鞋们准备得肿么样了?本篇的文章，澳际带来了4月34日的sat官方数学题，借助这道sat考试题目，大家不妨找找感觉!话不多说，现在，就让我们来看看今天的资讯!

　　Mathematics>Standard Multiple Choice

　　Read the following sat test question and thenclick on a button to select your answer.

　　The number of data objects stored in a company's "cloud" increased at a rate of 190% per year for 5 years. At the end of the fifth year, the number reached 762 billion objects. From the beginningof the sixth year, 1 billion objects were being added daily to the company's cloud. If the growthrate had not changed in the sixth year, approximately how many more objects would havebeen on the company's cloud at the end of the sixth year than the actual number of objectsbased on the constant daily increase? (Use 365 days per year.)

　　A.1.1 trillion objects

　　B.2.2 trillion objects

　　C.320 billion objects

　　D.397 billion objects

　　澳际温馨提示：各sat考生在看过上述sat考试题目之后，自己分析解答，再看相应的sat考试答案及解析，会更有效哦!

　　答案：B

　　解析：

　　Choice A is correct. If the number of objects was growing by 190% per year, that meant there were 100%+190%=290% as many objects at the end of one year as there were at the end of the previous year. That is the same as multiplying by 2.9 each year. The growth during the first 5 years can be modeled using the expression A*2.9^t, where A is the initial number of objects stored in the cloud and t is the number of years that have passed.

　　Since there were 762 billion objects at the end of the fifth year, if the number of objects continued to grow at the same rate, by the end of sixth year this number would be 2209.8 billion, which is about 2.2 trillion.

　　Once the company begins reporting a steady amount of increase per day, we can use a linear model. Since during the sixth year, 1 billion objects were added each day, 365 billion objects were reported to be added in the sixth year. So the total number of objects (in billions) at the end of the sixth year is 762 +365=1127, or approximately 1.1 trillion objects.

　　Therore the difference between the total number of objects that would have been stored if the rate remained exponential and the total number of objects given the linear rate (in trillions) is 2.2-1.1=1.1. So, there would have been about 1.1 trillion more objects stored if the rate continued to be exponential.

　　怎样，这次的sat考试题目，是否令童鞋们满意?大家是否答对了呢?好啦，以上，就是今天的sat资讯，如想掌握其他讯息，欢迎继续关注澳际教育sat考试频道，相信澳际，您一定不会失望而归!感谢阅读!

　　sat金牌一对一

　　想要快速提分，一对一最适合你

　　1一对一会根据你的实际情况制定计划

　　2每天有专职顾问记录你全天的学习进度

　　3授课的时间、地点、形式都非常灵活

　　4一对一授课的吸收率是大班课的5倍

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　　数据证明一对一授课的吸收率，是大班课的5倍!

　　澳际标准化sat课程教学体系——平均教龄5年以澳际师研发，历经8年sat考试实战验证，数据证明一对一授课的吸收率，一对一授课效率是小班授课的2~3倍，是大班课的5倍，最大限度保证学习效果，家长要做的就是放心把孩子交给澳际。

　　一对一授课能为你做什么?

　　一对一的授课非常适合想要快速提分的学生，它的吸收率比班课更高，排课更为灵活，这意味着用更短的时间达成目标。尤其是想要冲击高分的学生，很难在约定俗成的班课上有针对性地弥补短板。老师在一对一的形式下，也能更好地照顾到学生的需求。以作文批改为例，如果是班课就难以实现，因为数量太多了，费时费力。但在澳际的一对一授课中，每位学生都能获得经老师2次修改成文的文章4-6篇。想在25分钟内流畅地写出500词以上的文章，没有这个打磨的过程，谈何容易。

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