What's the centripetal force needed to keep the moon in orbit?

Question

Furthermore, what's it's gravitational attraction to the Earth?

How would I calculate these two things?

Answer 1

Centripetal force needed to keep the moon in orbit assuming circular orbit is given by

Force = mv^2/r = GmM/r^2,

where,
m = mass of moon
M = mass of earth
G = universal gravitational constant = 6.67 x 10^(-11) Nm^2/kg^2,
r = distance between moon and earth.

Both the centripetal force and gravitational force of attraction are the same.

Answer 2

First of all, the centrifugal force makes things fly away, gravity brings them closer. In our system there is the suns gravitational force to consider as well.
I don't know how to calculate that.