Question 514914
m is inversely proportional to the square of n
that is ,
 m is proportional to {{{1/(n^2)}}}
{{{m=k*1/(n^2)}}} where k is the constant of proportionality 
if m is 4/25 and n is 5
{{{4/25=k/(5^2)}}}
{{{4/25=k/25}}}
Hence the constant of proportionality k is {{{4/25*25}}}={{{4}}}
given n is 8
then
{{{m=4/(8^2)}}} since k =4 n=8
{{{m=4/64}}}
{{{m=1/16}}}