Question

PLEASE ANSWER THE Q.5 FAST!!!!

Answer 1

Vorbital=√GM/√R
M is mass of the earth
G is gravitational constant value is given in the question.

R= 6400+900=7300km
put these values in the formula.

Hope this help.

Answer 2

let mass of Earth, m=6×1024 kg

radius of earth=11nm²/kg²

see the attachment