yeah, come on guys, the car definitely leaves orbit. she clearly says the car goes 100kph. it can therefore be assumed that the acceleration is variable dependent on the requirements needed at any given time to propel the car out of orbit at 100kph. my guess is that we are also supposed to assume that some sort of secondary propulsion is used to keep the car 'fixed' as well as stopped so that it doesn't fall back to earth some every time it stops.

I think the really appalling part of this question is the abhorrent disregard for significant figures. 12th decimal place? really? assuming the answer is in the thousands of hours range, that requires an answer with 16 significant digits when the most you have given us in the variables is 6! There is no way to be that accurate with the data given.

also, as far as the jet engine cars are concerned, jet engines are not rockets, at least not from my understanding. Jet engines still require atmospheric oxygen to operate whereas a rocket has all the required oxygen mixed into the fuel. That is why we don't send jets to space, we send rockets...