Which of the following uses the correct formula to find the approximate circumference of a circle that has a radius of 450?

Question

1. c = 3.14 x 150

2. c = 2 x 3.14 x 450

3. c = 3.14 x 450^2

4. c = 3.14 x 450 divided by 2

Answer 1

2. c = 2 x 3.14 x 450