A bystander witnesses a train passing by them at t = 0, where the position function s(t) = t³ - 6t gives the position in miles of a freight train from their position. East is the positive direction, and t is measured in hours. a) Determine the direction the train is traveling when a(t) = 0. Select an answer ✓ b) Determine the time intervals when the train is speeding up. hours

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A: Topic:- algebra

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A: ∫ cos3tanxsec2xdx

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Q: questions

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