contestada

The radius r of a circle can be written as a function of the area A with the following equation: r=square root A over pie What is the domain of this function? Explain why it makes sense in this context.

Respuesta :

calculista
The formula of the radius is
[tex]r= \sqrt{ \frac{A}{ \pi } [/tex]

 In this context, it makes sense as the radius cannot have a negative value. 
Thus, the domain of the function is [0,∞)
This means that the Area can have any positive value starting from zero.