Question

question 2 of 10
what is the surface area of the cube below?

a. 405 units²
b. 508 units²
c. 729 units²
d. 486 units²

Explanation:

Step1: Recall the formula for the surface area of a cube

The surface area formula for a cube is \(SA = 6s^{2}\), where \(s\) is the side - length of the cube.

Step2: Identify the side - length of the cube

From the problem, the side - length \(s = 9\).

Step3: Substitute the value of \(s\) into the formula

Substitute \(s = 9\) into \(SA=6s^{2}\). We get \(SA = 6\times9^{2}\).
First, calculate \(9^{2}=81\). Then \(6\times81 = 486\).

Answer:

D. 486 units²