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 hundreth

Answer 1

1) Find the radius of the circle.  You can do that by inspection; no work required.
2) Use the "area of a circle" formula A = pi r^2 to calculate the area.
3) Round off your area calculation to the nearest hundredth.