ASAP! GIVING BRAINLIEST! Please read the question THEN answer correctly! No guessing.

Answer:
A. 50.24
Step-by-step explanation:
It is given that "r," represents the radius, and it's also given that it's 4. All you need to do is plug in 4 for r, into the function, like so:
[tex]f(4) = 3.14(4)^2[/tex]
f(4) = 3.14(16)
f(4) = 50. 24