If a circle has a radius of 4 cm, what is its circumference? (Use π ≈ 3.14)

To find the circumference of a circle, you can use the formula:

[ C = 2\pi r ]

where ( C ) is the circumference and ( r ) is the radius of the circle. Given that the radius is 4 cm and using ( \pi \approx 3.14 ), you can substitute these values into the formula:

[ C = 2 \times 3.14 \times 4 ]

Calculating this step-by-step:

1. First, multiply the radius by 2: [ 2 \times 4 = 8 ]

2. Next, multiply that result by ( \pi ): [ 8 \times 3.14 = 25.12 ]

Therefore, the circumference of the circle is 25.12 cm, which corresponds to the first option. This shows that using the correct formula and values leads to the accurate calculation of the circle's circumference, confirming that the choice reflects the proper mathematical relationship.