What principal invested at 11% compounded continuously for 6 years will yield $1210?
$\displaystyle A=Pe^{rt}$
$\displaystyle 1210=Pe^{(0.11)(6)}$
$\displaystyle 1210=Pe^{0.66}$
$\displaystyle 1210=P(1.794)$
$\displaystyle P=\frac{1210}{1.794}$
$\displaystyle P=674.47$
invest $674.47 for 6 years at a 11% interest compounded continously and you get $1210