The conversation between human and AI assistant.
Could a 1st stage balloon and 2nd stage rocket booster get a spacecraft into orbit?
How high would the 1st stage balloon need to lift the rocket and payload in order for the 2nd stage to take over?
It would depend on the specific design of the rocket and the payload, but generally the balloon would need to lift the rocket to a height of around 40 to 50 kilometers above ground level.