Respuesta :

SenorMathWiz

Answer:

C = 8π

Step-by-step explanation:

C = πd

d = 2r

Given : r = 4

d = 2r and r = 4

Plug in 4

d = 2(4)

2(4) = 8

D = 8

We then have C=πd and d = 8

So plug in 8

C = 8π