Question 852102
{{{Q(t) = Q[0]e^(-kt )}}}
{{{Q(t) = Q[0]e^(-.00012t)}}}  |no formula followed:  assume k = .00012 for C-14
{{{Q(t)/Q[0] = .29 = e^(-.00012t)}}} 
 ln(.29)/(-.00012) = t