Question

Find the area of the given circle. Round to the nearest tenth.

11.0 ft^2
38.5 ft^2
42.8 ft^2
113.0 ft^2

Answer 1

`diameter=12\ ft\\\\diameter=2\ radius\\\\2r=12\ ft.\ \ \ /:2\\r=6\ ft.\\\\A=\pi r^2\\\\A=\pi\cdot6^2=36\pi\ (ft^2)\approx36\cdot3.14=113.04\ (ft^2)\approx113.0\ (ft^2)`