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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -30x^2+3300x-84000 ≥6480 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -30 * x ^ 2 + 3300 * x - 84000 ≥6480         (1)

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    From inequality(1)：
         52 ≤ x ≤ 58

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    The final solution set is :
         52 ≤ x ≤ 58

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