Originally Posted by

**TKHunny** What have you tried? These are ratios.

$\displaystyle \frac{\sqrt{x}}{25}=\frac{3}{5}$

$\displaystyle \sqrt{x}=\frac{3}{5}\cdot 25 = 3\cdot 5 = 15$

Can you take it from there?

Have you considered multiplication? $\displaystyle \sqrt{64} - \sqrt{4}$

Can you take it from there?

Have you considered squaring? $\displaystyle 5^{2}\cdot \sqrt{2}^{2} = 25 \cdot 2$

Can you take it form there?

Have you considered prime factorization?

Let's see your work. Have you made any efforts? Do you want the volunteers, here, to do all your homework or take your exam? Give us a clue where you are and how we can help you.