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ZX-DC4384FDB82026年8月国际B卷 · 第 20 题
2026年8月国际B卷 · 原库模块 1 · Q20 参考答案
A computer program models the total mass of the population of a certain type of algae after the algae was placed in an environment where it has no natural predators. According to the model, the estimated total mass of this population of algae at the end of every 6‑hour period is 129% greater than the estimated total mass of this population of algae at the end of the previous 6‑hour period, and the estimated total mass of this population of algae is 613.90 grams after 18 hours. Which equation best represents this model, where A is the estimated total mass, in grams, of the population of algae after x hours, and x < 50?
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