Math homework help

Problem 2:

Find the elevation h (km) where the weight of an object is one-tenth (1/10) its weight on the surface of the earth.m_e = 5.9742×10²⁴ kg; r_e = 6,378 km

Problem 3:

Two identical asteroids travel through space side by side while touching each other. If the asteroids are composed of homogeneous pure iron ( = 7,874kg/m³) and are spherical, what diameter in meters and milesmust they have for their mutual gravitational attraction to be 5 N?