If 0.13 ÷ p^2 = 13 , then p equals = ?

Answer: Option B

$$\begin{array}{rl}& \iff \frac{0.13}{p^2}=13\\ & \iff p^2=\frac{0.13}{13}\\ & \iff p^2=\frac{1}{100}\\ & \iff p=\sqrt{\frac{1}{100}}\\ & \iff p=\frac{1}{10}\\ & \iff p=0.1\end{array}$$