Hey there Ms or Mr could you please help me out with this problem?just so you know, this is Pythagorean theorem & Simplifying Radicals

Explanation
remember this propertie
[tex]\sqrt[]{ab}=\sqrt[]{a}\cdot\sqrt[]{b}[/tex]then,you can write 500 as 5*100
[tex]\begin{gathered} \sqrt[]{500} \\ \sqrt[]{500}=\sqrt[]{100\cdot5} \\ \sqrt[]{500}=\sqrt[]{100}\cdot\sqrt[]{5} \\ \sqrt[]{500}=10\sqrt[]{5} \end{gathered}[/tex]so, the answer is
[tex]B)10\sqrt[]{5}[/tex]I hope this helps you