Just one.
There r 5
3.2 is good, but we don't know if there will be more girls than boys cause we can't predict the future. if there are more girls then human population might extinct by 2100 also the adding pollution...
The distance to the moon is about 30 earth diameters, or about 9.6 earth circumferences.
It depends on your way of traveling to space (100km/62mi) above the Earth's surface. A rocket takes a matter of minutes to reach outter space.