Please help me with this, I even got it right but it marked me wrong someone help me out

Answer:
[tex]s=\sqrt{\frac{3V}{h}}[/tex]
Step-by-step explanation:
We have to re-write the equation and use algebra and solve for s.
This means, we need an expression where it will be "s=SOMETHING".
Lets show the process below:
[tex]V=\frac{1}{3}s^2 h\\V=\frac{s^2 h}{3}[/tex]
Now we cross multiply and solve for s:
[tex]V=\frac{s^2 h}{3}\\3V=s^2h\\s^2=\frac{3V}{h}\\s=\sqrt{\frac{3V}{h}}[/tex]
Note: to get s^2 to s, we take square root and eliminate the square
The formula for "s" is:
[tex]s=\sqrt{\frac{3V}{h}}[/tex]