ONE QUESTION, ONE STEP
ZX-7BB06ED24326年8月国际C卷练习 · 第 22 题
26年8月国际C卷练习 · 原库模块 1 · Q22 参考答案
A researcher observes a sample of a nuclide. An exponential model estimates that the mass, in grams, of the sample decreases by 21% every 19.72 minutes. Which of the following equations could represent this model, where M is the estimated mass, in grams, of the sample t minutes after the researcher began observing the sample?
参考答案：
解题思路
容易忽略的一步
