We have been given that area of a square postage stamp is [tex]\frac{81}{100} \text{ in}^2[/tex]
We have to find the side length of the stamp. In order to find the same, we use the formula for area of a square.
The area of a square with side length 'a' is given by
[tex]A=a^2[/tex]
Substituting the value of area in this formula, we get
[tex]\frac{81}{100} = a^2\\ \\ a=\frac{9}{10}[/tex]
Therefore, the side length of the stamp is given by 9/10 inches.
