Question

what is the missing length? area = 6889 mm²

Explanation:

Step1: Recall area formula for square

The area formula for a square is $A = s^2$, where $s$ is the side - length and in this case $s = y$ and $A=6889\ mm^2$. So we have the equation $y^{2}=6889$.

Step2: Solve for $y$

Take the square root of both sides. Since $y$ represents a length (a non - negative quantity), $y=\sqrt{6889}$. Calculating $\sqrt{6889}=83$.

Answer:

$83\ mm$