I might not respond for a little while, please don’t end the session! Need help on #3 and 4

We have a right triangle with a 15m hypotenuse and a 8m leg. If we use x for the missing leg then the Pythagorean Theorem states that:
[tex]15^2=8^2+x^2[/tex]Then we have to solve that equation for x:
[tex]\begin{gathered} x^2=15^2-8^2=225-64 \\ x^2=161 \\ x=\sqrt[]{161} \end{gathered}[/tex]So the answer is the square root of 161.