To find the circumference of a circle, we use the formula:

$C = 2 \pi r$

Where:

• $C$ is the circumference,
• $r$ is the radius of the circle,
• $\pi \approx 3.1416$.

From the image, the radius $r = 4$ feet. Now, let's calculate the circumference:

$C = 2 \times 3.1416 \times 4 = 25.12 \text{ feet}.$

Therefore, the correct answer is 25.12 feet.

Would you like a more detailed explanation or have any questions about this?

Here are 5 related questions for you:

1. What would happen to the circumference if the radius were doubled?
2. How do you calculate the area of a circle using the radius?
3. If the diameter of the circle were given, how would you calculate the circumference?
4. Can you explain the concept of $\pi$ and why it is used in circle calculations?
5. How do you calculate the circumference of a circle when the diameter is provided directly?

Tip: Always ensure you're using the correct units (like feet or meters) and converting them when necessary!