A particle moves along the x-axis so that at any time t > 0 its position is given by a (t) = (at)², where a is a positive constant. For what values of t is the particle moving to the right? A B D The particle is moving to the right only if 0 < t < a. The particle is moving to the right only if a < t. The particle is moving to the right only if t = a. The particle is not moving to the right.

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