Question

I need to know the process and the answer and how to get it

Answer 1

We have the following expression:

`A=3.14r^(2)`

We can divide both sides by 3.14 and we got

`(A)/(3.14)=r^(2)`

Then we can take square root in both sides and we have:

`r=\pm\sqrt[]{(A)/(3.14)}`