Question 208039
Divide both sides by 12000

(1+r)^2 = 27000/12000
(1+r)^2=9/4


Take the square root of both sides:
1+r=3/2    or   1+r=-3/2   (reject negative answers!)
r=3/2-1
r=1/2
r=.50 = 50%  --  Pretty good investment!!


R^2