The International space station has a mass of 419,600 kg and GPE of 1,049,000,000,000 J. How high above the Earth is it?
gravitational Energy is
but you have only the mass and two unknown datas, h ang g, in fact you can't use for g 9,8m/s^2 because you are far from earth surface. so let us write g in function of h and you must use the relation
solving in function of h you have the second degree equation