Question 181844
You are told that a person's weight varies with the square of their distance to the center of the Earth. Let C be some constant.

At 4000 miles from the center of the earth (on the surface) you weigh
You are told {{{180 = C/(4000)^2}}}
{{{180*4000^2 = C}}}
{{{2880000000 = C}}}

Now solve for the weight at 4500 miles (500 miles above the earth)
{{{w = 2880000000/(4500)^2}}}
{{{w = 142.2}}}