F = GMm/r^2
So F is proportional to 1/r^2
F2 = 2700 x ( 1 / 3^2 ) = 300N
the answer for this question is c
You can describe the location of any event ... past, present, or future... with
four numbers, representing the four dimensions of the universe we live in.
The numbers are the three space coordinates of the event ... the 'x', 'y', and 'z'
of its physical location ... and the 't' of its location in time.