please answer the questions, answer letter only, no need solution

47 Andrei drives for 30 min at 100 km/hr and then stop for 15 min. He then drive for 45 min at 80 km/hr. John's average speed for the entire trip is approximately: * (2 Points) 73 km/hr O 83 km/hr O 88 km/hr O 97 km/hr0000 43 The displacement of an object fer a round trip between two locations: * [2 Paints} is always greater than zero is zero is always less than zero can be greater or less than but not zero as If the speed of particle "A" is twice that of particle "B", the distance particle "B" travels in a given interval of time as compared with particle "A" is: * (2 Points} 0 twice as great 0 four times as great 0 half as great 0 onefourth as great 50 The speed v of a car moving on a straight road is given in m/s as a function of time t in seconds by the following equation: v = 4 + 2t^3. What is the acceleration of the car at t = 2 seconds? * CO (2 Points) 12m/51 2 16 m/s^2 20 m/s^2 O 24 m/5^ 246 A particle moves from x0 = 30 cm to x = -40cm in 5 sec. The average velocity of the particle during this time interval is: * (2 Points) 2 cm/sec -2 cm/sec 14 cm/sec -14 cm/sec