A 0.25kg puck is initially stationary on an ice surface with negligible friction. At time t=0s a horizontal force begins to move the puck. The force is given by F=(12.0 - 3.0t²)i, with F in newtons and t in seconds, and it acts until it's magnitude is 0. What is the change in momentum of the puck between t=0 and the instant at which F=0?

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