# Find the open t-intervals on which the particle is moving to the right. (Enter your answer using interval notation.)?

x(t) = t3 − 12t2 + 21t − 5, 0 ≤ t ≤ 10

(c) Find the velocity of the particle when the acceleration is 0.

(b) Find the open t-intervals on which the particle is moving to the right. (Enter your answer using interval notation.)

(c) Find the velocity of the particle when the acceleration is 0.

(b) Find the open t-intervals on which the particle is moving to the right. (Enter your answer using interval notation.)

Update:
C) v(t) = 3(t − 1)(t − 5) , t=4 , v(t)=-9?

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