Question 948858
{{{T^2=((4pi^2)/(GM))r^3}}}
Multiply both sides by M.
{{{MT^2=((4pi^2)/(G))r^3}}}
{{{M=((4pi^2)/(T^2*G))r^3}}}
{{{highlight(M=(4pi^2r^3)/(GT^2))}}}