HELP!! :(
The area (A) of a circle is a function of its radius (r) and is given by the function A = f(r) = πr2. What is the domain of this function?

a: all positive real numbers
b: all real numbers
c: all positive real numbers including 0
d: all real numbers excluding fractions

Question

HELP!! :(
The area (A) of a circle is a function of its radius (r) and is given by the function A = f(r) = πr2. What is the domain of this function?

a: all positive real numbers
b: all real numbers
c: all positive real numbers including 0
d: all real numbers excluding fractions

directrix · Answer

Can the radius of a circle be negative?

anonymous · Answer

no it cannot...@Directrix

directrix · Answer

Can the radius be 0?

directrix · Answer

@cmvbubu

directrix · Answer

For a tag to activate, you cannot let the @ touch any character on the left such as in this:  ..@Directrix

directrix · Answer

No negatives and no zero but the other real numbers are ok.