A particle moves along the x-axis, its position given by r(t) t> 0, where t is measured in seconds and z in meters. 1+t2 (a) Find the acceleration at time t. (b) When is the particle speeding up? (C) When is the particle slowing down? (a) a(t) (b) Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 6 times. Your overall recorded score is 0%. You have unlimited attempts remaining.

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