A boat moves 60 kilometers east from point A to point B. There, it reverses direction and travels another 45 kilometers toward point A What are the total distance and tota displacement of the boat

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)