Find the area of the shape below using as an approximation for . Round your answer to two decimal places.
The shown figure represents a circle inside a regular hexagon. Find the area of the shaded regions, giving your answer to the nearest tenth.
Noah wants to paint one of the walls in his house; it is a rectangular wall with dimensions as seen in the given figure. He does not need to paint the door and will buy a gallon tin of paint that covers 400 square feet of wall. Work out what fraction of the tin will remain after he has painted the wall.