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2025年8月国际A卷 · 第 6 题

2025年8月国际A卷 · 原库模块 1 · Q6 原库参考解析

The function \( f(x)=-30x+310 \) gives the predicted height above the ground \( f(x) \), in feet, of a model airplane x minutes after it begins to descend. What is the predicted height above the ground, in feet, of the model airplane 2 minutes after it begins to descend?
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