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2026年3月国际C卷 · 第 19 题

2026年3月国际C卷 · 原库模块 1 · Q19 原库参考解析

One gallon of sealant costs $17 and will cover 450 square feet of a surface. A deck has a total surface area of d square feet. Which equation represents the cost c, in dollars, of the sealant needed to cover the deck twice?
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