Answer
$55$ feet
Work Step by Step
A square with area $3000$ square feet will have side lengths that are the square root of the area.
This is because, for a square, Area = $s^2$, so $s=\sqrt A$
With an area of $3000$ feet squared, $s=\sqrt {3000}$
We will use method 2 in the book to estimate the square root.
According to a calculator's square root function, $\sqrt {3000}\approx54.77$ feet
Since $54.77$ is closer to $55$ than to $54$, we round to the nearest integer which is $55$ feet.
