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ZX-F9120A52552026年8月国际A卷 · 第 10 题
2026年8月国际A卷 · 原库模块 2 · Q10 参考答案
A scientist initially measures 6,000 bacteria in a growth medium. 4 hours later, the scientist measures 12,000 bacteria. Assuming exponential growth, the formula \( P=C2^{rt} \) gives the number of bacteria in the growth medium, where r and C are constants and P is the number of bacteria t hours after the initial measurement. What is the value of r?
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