The property of matter that resists a change in its motion is called . A. inertia

My own answer is letter C

Explanation:

The acceleration due to gravity g is defined as

and solving for R, we find that

We need the mass M of the planet first and we can do that by noting that the centripetal acceleration experienced by the satellite is equal to the gravitational force or

The orbital velocity v is the velocity of the satellite around the planet defined as

where r is the radius of the satellite's orbit in meters and T is the period or the time it takes for the satellite to circle the planet in seconds. We can then rewrite Eqn(2) as

Solving for M, we get

Putting this expression back into Eqn(1), we get