Question

How is this right? Can someone explain to me how to do this?

What is the exact area of a circle with a diameter of 44 ft?

Answer 1

First, we calculate the radius of the circle.
radius=diameter / 2
radius=44 ft / 2=22 ft.

Second; we calculate the area of a circle.
area of a circle=πr²
area of a circle=π(22 ft)²=484π ft²

Remember: 22²=22 * 22 =484

Answer: B) 484π ft²