[官方出品]SAT数学练习题daily practice（2018年4月13日）

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4月13日SAT语法每日一练

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.

4月13日SAT数学每日一练推荐词汇

context['kɔntekst]n. 上下文，环境，背景

interpretation[in.tə:pri'teiʃən]n. 解释，阐释，翻译，(艺术的)演绎

option['ɔpʃən]n. 选择权，可选物，优先购买权 v. 给予

function['fʌŋkʃən]n. 功能，函数，职务，重大聚会 vi. 运行

multiple['mʌltipl]adj. 许多，多种多样的 n. 倍数，并联

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