Which scenario would result in the fastest rate of dissolution? a) a sugar cube in hot water. b) a sugar cube in cool water. c) powdered sugar in hot water. d) powdered sugar in cool water.

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.