$15000 compounded continuously at a rate of 3% for 11 years will yield a final amount of $20864.52. The equation for continuously compounded interest A = Pe^rt where A=End Amount P=Inital Amount e=eulers number (approximately 2.7) r=growth rate per year and t= time. So for your problem, p= 15000 r= 3 and t= 11. Plug that into your calculator and you'll get $20864.52.