Using π ≈ 3.1416, what is the area of a circle with radius 3?

• A. 9π
• B. 28
• C. 27
• D. 9π (≈ 28.27)

Answer: (D)

Area is found with A = πr^2. With radius 3, that’s A = π × 3^2 = 9π. If you substitute π ≈ 3.1416, you get A ≈ 9 × 3.1416 = 28.2744, which rounds to about 28.27. So the best choice is the one that shows 9π along with its approximate value 28.27. The other numbers come from using different, less accurate approximations of π.