The correct answer is: [A]: " 384 in² " . _______________________________________________________
Explanation: ______________________________________________________ The formula for the surface area of a cube is: ______________________________________________________
→ A = 6a² ; ______________________________________________________→ in which: ______________________________________________________ A = surface area of the cube— for which we shall solve ; (in "square units" ; or, " in² " ; in our case) ;
a= side length = " 8 in " (given);
→ Note: A cube has all equal side lengths.
→ The "6" in the formula accounts for "6 sides" of a cube.
→ To solve for the surface area of the cube; plug in our known value(s); & solve; as follows: _______________________________________________________ → A = 6 a² ;
= 6 * (8 in)² ;
= 6 * 8² * in² ;
= 6 * 8 * 8 * in² ;
= 48 * 8 * in² ;
= 384 in² ; _______________________________________________________ The answer is: " 384 in² " ;
→ which is: Answer choice: [A]: " 384 in² " . _______________________________________________________
