If the radius of the circle is 4 cm, find its circumference. [use 3.14 for π.]

The formula for the circumference of a circle is:

C = 2 × π × r       or   C = 2πr

You know:

r = 4             So plug it into the formula

C = 2πr

C = 2π(4)

C = 8π or 25.1327412287    

[I don't know how you need to write your answer or where it needs to be rounded]

2 and 1.

step-by-step explanation:

plug in each answer. 0 doesn't work, 1 does. so does 2. 4 doesn't:

0 = 1 is not true.

2 = 2 is true.

4 = 4 is true.

8 = 16 is not true.

hope this !

step-by-step explanation: 2