Answer:
40 Ibs
Explanation:
"The weight (W) of an object on earth varies inversely with the square of its (not it's) distance (d) from the center of the earth" This relationship can be expressed as:
W= K/ d2
where k is the constant of variation.
To find the value of k, we'll substitute the given values of W = 90 lbs and d = 8000 miles.
k= 5760000000
d= 12000 * 12000= 144000000
So our formula becomes:
Substitute d = 12000 miles.
w= 57600000000 / 144000000
w=
40 lbs.
