Question 163811
{{{R = (2 G M )/ (c^2) }}}

G = gravitational constant {{{6.7x10^-11}}} 

M= mass of the object {{{M = 2x10^30}}}

C = speed of light {{{3x10^8 }}}

Four variables. Given 3 of them, find the fourth. So plug in using scientific notation and grind it out

{{{R = (2 * 6.7x10^-11 * 2x10^30)/(3x10^8)^2}}}
{{{R = (4 * 6.7x10^19)/(9x10^16)}}}
{{{R = (26.8x10^3)/9}}}
{{{R = (2.98x10^3)}}}