An artist wishes to paint a circular region on a square poster that is 5 feet on a side. If the area of the circular region is to be 1/2 the area of the poster, what must be the radius of the circular region in feet?	Choices.
A) 1/pi
B) sqrt(2/pi)
C) 2/sqrt(pi)
D) sqrt(12.5/pi)
E) pi/2
Area of the poster is 5x5 = 25   1/2 the area = 12.5   pi*r^2 = 12.5   r^2 = 12.5/pi   r = sqrt(12.5/pi) answer (sqrt(12.5/pi))
<result>D</result>
An artist wishes to paint a circular region on a square poster that is 5 feet on a side. If the area of the circular region is to be 1/2 the area of the poster, what must be the radius of the circular region in feet?