Question

The area of a square piece of cardboard is 81 square inches. What is the length of the cardboard?

A. 8 inches
B. 9 inches
C. 20.25 inches
D. 10 inches

Answer 1

Explanation:

The area of a square is found in the formula

`A=s^2`

We have the Area value so we will plug it in:

`81=s^2`

Take the square root of both sides to undo the square on the s to get that

s = 9