Hello!
A(r) is a function. It takes a value of r, and from that calculates the value A. In this case, it takes the value of a radius, and depending on what that value is, it calculates the area.
A(3) would therefore represent the area based off of a radius of 3.
Hope this helps!
Answer:
A(3) = pi (3)^2.
Step-by-step explanation:
A(3) represents the area of a circle with a radius of 3.
