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ZX-D00FB7E284Linear functions · 第 15 题
Linear functions · 原库模块 1 · Q15 原库参考解析
For groups of 25 or more people, a museum charges $21 per person for the first 25 people and $14 for each additional person. Which function f gives the total charge, in dollars, for a tour group with n people, where n \( \ge \) 25 ?
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