Universal law of gravity question

[Rgonzales]

Homework Statement

The question is: What is the distance between the moon and the Earth if the mass of the moon is 7.34 x 10(to the power of 22) kg and the force of attraction between the two is 2.00 x 10(to the power of 20) N?

Mass of the moon = 7.34 x 10(to the power of 22) kg
Attraction = 2.00 x 10(to the power of 20) N
Gravitional constant = -6.67 x 10(to the power of -11) N.m(squared)/kg(squared)
Mass of the Earth = ?
Distance between Earth and moon = ?

Homework Equations

F = G x m1 x m2
r(squared)

The Attempt at a Solution

First, I am pretty sure that i first need to find the mass of the earth. After, i will be able to sub in all the information to get the answer. I just need help to find the mass of the earth. Please help me.

 

[Doc Al]

Just Google "mass of earth".

 

[Rgonzales]

got it. thank you