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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 195+3.75x-0.0031x^2 ≥400 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        195 + 3.75 * x - 0.0031 * x ^ 2 ≥400         (1)

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    From inequality(1)：
         x ≥ 57.389322

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    The final solution set is :
         x ≥ 57.389322

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