1.If the 0-100km/h accelerate time for a sport car is 3.9, what is it acceleration in m/s^2?

2.If it takes 30 minutes to drive to work at an average speed of 65 km/h on the road, but you stop for breakfast, which takes an extra 25 minutes, what is the average speed of your trip to work? (in the unit of km/h)

3.If a car changes its speed from (8.00x10^-1) m/s to (2.360x10^1) m/s in (1.7200x10^1) s, what is it's acceleration in? ( express your result withthreesignificant digits)