Question

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

A) V = 21^3 cm^3
B) V = 21^2 cm^3
C) V = 3^21 cm^2
D) V = 2^21 cm^3

Answer 1

The volume of a cube with an edge length of 21 cm is expressed using an exponent as V = 21³ cm³, which is option A).

Step-by-step explanation:

To calculate the volume of a cube with an edge length of 21 cm, we use the formula for the volume of a cube, which is V = s³, where s is the length of a side of the cube. So for a cube with an edge length of 21 cm, the volume V would be calculated as V = 21³ cm³. Thus, the correct expression using an exponent to express its volume is V = 21³ cm³.

The option that correctly represents this is A) V = 21³ cm³, making it the answer to the student's question.