F= 2.0*10^20 n, g = 6.67*10^-11 nm^2/kg^2, m1 = 5.98*10^24kg, r = 3.8×10^8m. solve for m2. i just need detailed on how to solve it

With the given values of , we have

Try dealing with the powers of 10 first: On the right, we have

Meanwhile, the other values on the right reduce to

Then taking units into account, we end up with the equation

Now we solve for :

or, if taking significant digits into account,

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )