A substance decays from 100100100g to 202020g in 444 hours. If it follows M(t)=M0e−ktM(t) = M_0 e^{-kt}M(t)=M0e−kt, what is kkk?
ln(5)4\frac{\ln(5)}{4}4ln(5)
ln(4)5\frac{\ln(4)}{5}5ln(4)
4ln(5)4\ln(5)4ln(5)
14ln(0.2)\frac{1}{4}\ln(0.2)41ln(0.2)