Given that the radius r of a circle is written as a function of the area A with the following equation:
![r=\sqrt[]{(A)/(\pi)}](https://img.qammunity.org/2023/formulas/mathematics/college/8m10f0ajyg8lzllx33hft09frh505dbyuq.png)
The domain of the above function is the area A of the circle.
This is because, in this context, the area is an independent and unique variable.
A is the input value.