Matana, this is the solution!
Principal = 11,000
Interest rate = 6% (0.06) compounded continuously
Interest amount = $ 1,402.47
Future Value = 12,402.47 (Principal + Interest amount)
t = ?
Let's recall that:
t = log (Future Value/Principal)/Interest rate
t = (log 12,40247/11,000)/0.06
t = 2 years