Question

what is the surface area of the cube? 6.4 in. 6.4 in. 6.4 in. square inches

Explanation:

Step1: Recall surface - area formula for cube

The surface - area formula of a cube is $S = 6s^{2}$, where $s$ is the side - length of the cube.

Step2: Substitute the side - length value

Given $s = 6.4$ inches. Substitute $s$ into the formula: $S=6\times(6.4)^{2}$.
First, calculate $(6.4)^{2}=6.4\times6.4 = 40.96$.
Then, $S = 6\times40.96=245.76$.

Answer:

$245.76$