2026年9月美国A卷 · 第 10 题

2026年9月美国A卷 · 原库模块 2 · Q10 参考答案

The graph shows the estimated concentration of a certain strain of bacteria, in millions of cells per mL of nutrient medium, over time x, in minutes since the initial measurement. According to the graph, which of the following is closest to the number of minutes it took for the estimated concentration of the bacteria to increase from the initial concentration to 20 million cells per mL of nutrient medium?