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ZX-558B9AFC35Bluebook试题8 · 第 9 题
Bluebook试题8 · 原库模块 3 · Q9 原库参考解析
A submersible device is used for ocean research. The function \( g(x)=−\frac{1}{55}(x+19)(x−35) \) gives the depth below the surface of the ocean, in meters, of the submersible device x minutes after collecting a sample, where \( x>0 \). How many minutes after collecting the sample did it take for the submersible device to reach the surface of the ocean?
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