Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality e^(-r/4) ≤0.0001*sqrt(3.14*r) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         e ^ ( -r / 4 ) ≤0.0001 * sqrt ( 3.14 * r )         (1)
        From the definition field of √
         3.14 * x ≥ 0        (2 )

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    From inequality(1)：
         r ≥ √31127367/200
    From inequality(2)：
         r ≥ 0

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    From inequalities (1) and (2)
         r ≥ √31127367/200    (3)

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    The final solution set is :
         r ≥ √31127367/200

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