Respuesta :

Answer:

C = 39.48

Step-by-step explanation:

C = r(3.14)^2

Answer:

25.13

C= 2πr = 2 · π · 4 ≈ 25.13274

Step-by-step explanation:

C= 2πr = 2 · π · 4 ≈ 25.13274