收藏本页
免费课程咨询:400-801-6269(8:30-21:30)

SAT考试网

Sat培训机构精选
当前位置: SAT >SAT数学 > 数学真题 >  文章

2019新SAT数学练习题及答案解析8

2019-02-12 10:30:43来源:SAT考试网分享
导读:小面小编分享的SAT考试数学试题,每道题目后面都有答案和详细的解析,希望同学们在练习的时候先不看答案,看看自己能够做对几道题。针对自己的复习规划查漏补缺。

>>SAT考试模拟题:2019新SAT数学练习题及答案解析8

>>SAT考试经典课程推荐

F(t)=0.95^(t/2)

The function F(t) gives the percentage, as adecimal, of information Dianna remembered t days after memorizing lines for a play. Assuming she did not work on her lines again, what is the best interpretation of the meaning of the function F in this context?

A.On any given day, Dianna will forget 95% of the lines 1 day after she memorizes them.

B.On any given day, Dianna will forget 95% of the lines 2 days after she memorizes them.

C.On any given day, Dianna will remember 95% of the lines 1 day after she memorizes them.

D.On any given day, Dianna will remember 95% of the lines 2 days after she memorizes them.

答案:D

解析:

Option D is correct. After 2 days, the exponent of the function will be 2/2=1. Dianna will remember (0.95^1)*100 or 95% of the lines.

SAT考试模拟题

In a recent study to determine how often people indifferent parts of the United States check the weather, a random sample of residents in New England and a random sample of residents on the West Coast were surveyed. The study found over 90% of people surveyed in New England checked the weather daily, while 70% of people surveyed on the West Coast did so. If the margin of error of both samples were the same, which of the following statements is best supported by the study's findings?

A.People in New England check the weather more often because the climate is colder than on the West Coast.

B.People in New England check the weather more often because there is more weather coverage on television than there is on the West Coast.

C.There is evidence that people in New England check the weather more often than people on the West Coast.

D.There is evidence that people in New England check the weather on their smartphones more than do people on the West Coast.

答案:C

解析:

Choice C is correct. A sample survey is a study that obtains data from a subset of a population, usually through a questionnaire or interview, in order to estimate population attributes.

Since the margin of error is the same for each sample, the only reasonable conclusion based on the data from the observational study is that there is evidence (although not a guarantee) that people in New England check the weather more often than people do on the West Coast.

以上这些试题都是很经典的,所以极具备参考价值。复习是一步一步来的,不是一天两天就能提高的。想学习更多SAT知识点就登录坦途网SAT考试频道吧,相信通过我们的帮助,同学们的SAT考试成绩会有很大提升,小编在这里等你哦!

温馨提示:因考试政策、内容不断变化与调整,坦途网提供的以上信息仅供参考,如有异议,请考生以权威部门公布的内容为准!

SAT培训课程免费试听

预约免费体验课您的信息不会显示在页面上或泄露给他人,我们将会通过电话反馈给您

课程预约立即提交

免费课程咨询:400-801-6269        真道(北京)信息技术有限公司版权所有 京ICP备12044874号-1

教育顾问
咨询电话
400-801-6269