【官方】SAT数学每日一题附答案和解析(2018年1月4日)
- 2018年01月31日10:18 来源：小站整理
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每日一练
Mathematics>Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
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：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.
