Hola cómo están friends tOmen puntos alguien quiere ser mi amigo o amiga o nv

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

15 point ! ~ see if you know the answer to both you!

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.