Which expression represents the area of a circle with radius 5?

Which expression represents the area of a circle with radius 5?

• A. 50π
• B. 25π
• C. 5π
• D. 125π

Answer: (B)

Area of a circle is found using πr^2. With a radius of 5, the area is π × 5^2 = 25π. The others would correspond to different radii: 50π would come from a radius of √50, 5π from a radius of √5, and 125π from a radius of √125. Since the radius is 5, the expression 25π is the correct area.

Area of a circle is found using πr^2. With a radius of 5, the area is π × 5^2 = 25π. The others would correspond to different radii: 50π would come from a radius of √50, 5π from a radius of √5, and 125π from a radius of √125. Since the radius is 5, the expression 25π is the correct area.