At what height above the earth's surface does the value of g becomes 36% of the value at the surface of earth ?

At what height from the surface of earth will the value of g becomes 40% from the value at the surface of earth. Take radius of the earth = 6.4 xx 10^(6) m .

A what height above the earth's surface the value of g becomes 25% of its value on the earth if radius of the earth is 6400km.

At what height h above the earth's surface, the value of g becomes g/2 (where R is the radius of the earth)

At a certain height above the earth's surface, the acceleration due to gravity is 4% of its value at the surface of the earth. Determine the height.

At what height above the earth surface, the value of g is half of its value on earth's surface ? Given its radius is 6400 km