Question 1043145
Use {{{A = P(1+r/n)^(nt)}}}, where, in this problem, A = $18,000, P = $15,000, 
n = 1, and t = 2.


===> {{{18000 = 15000(1+r)^2}}},

and you have to solve for r.

===> {{{1.2 = (1+r)^2}}}  ===> {{{r = sqrt(1.2)-1 = 0.095445}}}, 

to five significant figures.  Now the answer is clear.