Question

The point (3,0) lies on a circle with the center at the origin, what is the area of the circle to the nearest hundredeth

Answer 1

The formula for the area of a circle is 2πr.
The radius for this circle is 3 units, so you'd plug that into the formula like this:
2 * π * 3.
That on a calculator comes out to be approximately 18.84 units squared.
Hope this helps!