Apie-shaped concert hall is constructed so that theback
wall is an arc of a circle and the side walls meet at a pointbehind
the stage. the length of arc along the back wall is 148feet. the
front of the stage is 75 feet from the back wall and is30 feet from
the point where the side walls meet behind the stage. how much area
is available for seating in the concert hall? giveyour answer to
the nearest square foot.