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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

Respuesta :

Luv2Teach

Answer:

Step-by-step explanation:

The area of a square is found in the formula

[tex]A=s^2[/tex]

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

[tex]81=s^2[/tex]

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

s = 9

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