Question

A cube has an edge length of 21 cm. Use an exponent to express its volume.

a. 212121
b. 21^3
c. 21 * 3
d. None of the above

Answer 1

To express the volume of a cube with an edge length of 21 cm using an exponent, the correct answer is 21^3.

Step-by-step explanation:

To express the volume of a cube with an edge length of 21 cm using an exponent, we can use the formula V = s^3, where V represents the volume and s represents the length of one side.

Plugging in the value for s, which is 21 cm, we get V = 21^3.

Therefore, the correct answer is b. 21^3 as it uses an exponent to express the volume of the cube.