A cube's surface is made of 6 squares, (you can count it there are 6 faces :) ). A square's surface area is \({ x }^{ 2 }\) x is length of one edge. So we will multiply \({ x }^{ 2 }\) by 6 to find the total surface area. The x is given 8, let's plug it in the formula.
\(6{ x }^{ 2 }\\ \\ 6\cdot { 8 }^{ 2 }=6\cdot 64=384\quad square\quad units\)
Answer is C
