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5. The position of a particle moving in a straight line is given by s(t) = x3 - 4x + 1, where s is measured

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5. The position of a particle moving in a straight line is given by s(t) = x3 - 4x + 1, where s is measured in meters and t is measured in seconds. a.) At what time t is the velocity of the particle equal to 8 m/s? b.) What is the acceleration of the particle at the time found in part a

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