geometry
posted by mary .
April wants to add a ribbon border to the circular rug in her living room. If the area of her rug is 113.04 square feet, how long does the ribbon need to be?

since a = pi r^2,
113.04 = 3.14 r^2
r = 6 ft
since c = 2pi*r
c = 2*3.14*6
c = 37.68 ft 
i35