&@$$$??'wqqnnv

7. The horizontal position {in cm) of an object after 1.\" seconds is 5(t) = 150t 2t3, for t 2 0. 3. Find the velocity of the object at t = 3 seconds. Include units in your answer. b. On what intervals will the object move forwards? Move backwards? Explain your reasoning. c. Find the acceleration of the object at t = 3 seconds. Include units in your answer. d. On what intervals will the object be speeding up? Slowing down? Explain your reasoning