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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 60t-1.5t^2 >216t <= -60/(2*(-1.5)) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        60 * t - 1.5 * t ^ 2 >216 * t         (1)
        216 * t <= -60 / ( 2 * ( -1.5 ) )         (2)

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    From inequality(1)：
         -104 < t < 0
    From inequality(2)：
         t ≤ 0.092593

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    From inequalities (1) and (2)
         -104 < t < 0     (3)

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    The final solution set is :
         -104 < t < 0

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