First, let's find the distance x between the bottom of the slide and the ladder using the Pythagorean theorem:
[tex]\begin{gathered} 41^2=9^2+x^2\rightarrow41^2-9^2=x^2 \\ \rightarrow x=\sqrt[]{41^2-9^2} \\ \rightarrow x=40 \end{gathered}[/tex]
Now for the grid: You have to fill in the bubbles that you would use to write down 40, as following:
