At time t= 0, a particle is located at the point (7,2,8). It travels in a straight line to the point (3,3,3), has speed 5 at (7,2,8) and constant acceleration -4i +j-5k. Find an equation for the position vector r(t) of the particle at time t. The equation for the position vector r(t) of the particle at time t is r(t) = (Type exact answers, using radicals as needed)

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