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2025年3月国际B卷 · 第 1 题

2025年3月国际B卷 · 原库模块 1 · Q1 原库参考解析

\( s=40+2t \) 
The equation gives the speed s, in miles per hour, of a certain car t seconds after it began to accelerate. What is the speed, in miles per hour, of the car 4 seconds after it began to accelerate?
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