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ZX-C90A5EBF6F2026年9月国际C卷练习 · 第 7 题
2026年9月国际C卷练习 · 原库模块 2 · Q7 参考答案
The percent increase in mass of a certain red kangaroo from 70 days old to 140 days old was 563%. If this red kangaroo's mass was k grams at 70 days old, which expression represents its mass, in grams, at 140 days old?
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