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ZX-23DC68980525年10月国际C卷练习 · 第 16 题
25年10月国际C卷练习 · 原库模块 1 · Q16 原库参考解析
\( f(x)=-16x^2+99 \)
The function \( f \)gives the estimated height, in feet, of an acorn x seconds after the acorn fell from a tree. Based on the function, what is the estimated height, in feet, of the acorn before it fell from the tree?
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