Could you help me understand my questions?

35. The Space Shuttle is flying at 2.0 km/hr and lands on the runway. It then slows down to 0.5 km/hr. If this takes 0.25hrs, what is your acceleration? (4 pts) 36. A car travels west for 240 km in 4 hr. What is the car's velocity? (4 pts) 60 kmlar 37. A person walks 3 miles north, turns, and walks 2 miles east. Calculate the person's distance traveled and their displacement. (6 pts) 138. A boat is traveling at 43.2 km/hr. It then goes down a faster part of the river and is now going 144 km/hr which gave the boat an acceleration of 25.2 km/hr. How long did it take the boat to reach its new speed? (4 pts) 39. A competitive go-cart driver is traveling 32 m/s. He sees a caution flag go up, so he slows at a rate of -1.5 m/s in 10.8 s, what is his final velocity? (4 pts)