The answer is eighty/ eighty-two
Hello,
(-5x-3)(-5x+
3) = (-5x)² - 3²
we know that
For a spherical planet of radius r, the volume V and the surface area SA is equal to

The
ratio of these two quantities may be written as

we know


therefore
the answer is

F = kry
f/kr = y
y = f/kr
Answer: y = f/kr
*Hope that helps and enjoy Brainly:)