Answer:
[tex]r = 0.01[/tex]
Step-by-step explanation:
In order to find r we have to square both sides of the equation
[tex]0.1 = \sqrt{r} \\ {0.1}^{2} = { \sqrt{r} }^{2} [/tex]
The *square root* sign cancels out the *squared* sign therefore:
[tex] {0.1}^{2} = r \\ 0.01 = r[/tex]
