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ZX-80DC5C01ADBluebook试题10 · 第 22 题
Bluebook试题10 · 原库模块 3 · Q22 原库参考解析
A window repair specialist charges $220 for the first two hours of repair plus an hourly fee for each additional hour. The total cost for 5 hours of repair is $400. Which function \( f \) gives the total cost, in dollars, for x hours of repair, where \( x\ge2 \)?
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