Answer
$353.44 \leq x^2 \leq 392.04$
Work Step by Step
Inequality for the possible side lengths of the square using the given description.
$19.3 - 0.5\leq x \leq 19.3+0.5$
$18.8 \leq x \leq 19.8$
$353.44 \leq x^2 \leq 392.04$
(Take the square in the inequality to find the possible areas of the square)