Subject: mathqa
Question: an artist wishes to paint a circular region on a square poster that is 2.4 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 ?
Option: 
A: 1 / pi
B: 2 / sqrt ( pi )
C: sqrt ( 2.88 / pi )
D: 1
Answer: C