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[Issue Essay]

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题目:

Analytical!

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提问:

图发不上来,是一个半圆的隧道然后宽是20 The figure above shows the dimensions of a semicircular cross section of a one-way tunnel. The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel. If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel? A. 5½ ft B. 7½ ft C. 8 ½ ft D. 9½ ft E. 10 ft

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解答: 徐小梅老师

提问:

都没读懂这题在说啥...不知道怎么列公式!

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解答: ken@boost.org.cn老师

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没思路...只知道avg mean大于median 说明更多的房子销售价格是大于median的中位数的...位于median之后的数值的和要大于median之前数值的和...?

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解答: ken@boost.org.cn老师

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请帮助求解!

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