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# 2018年SAT考试数学备考练习题（21）

2018-04-04 17:44:00 来源：网络SAT资料下载

新东方在线SAT频道为大家带来2018年SAT考试数学备考练习题，希望对大家SAT备考有所帮助。更多精彩尽请关注新东方在线SAT频道!

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

The function F(t) gives the percentage, as a decimal, 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.

【答案解析】

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.

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