Question 1060544
Twenty minutes is  {{{1/3}}} hour.  That is the doubling time.


{{{y=1350*e^(kt)}}}



{{{2700=1350*e^(k*(1/3))}}}

{{{2=e^(k/3)}}}

{{{ln(2)=k/3}}}


{{{highlight(k=3*ln(2))}}}-------you can compute this with help of calculator or log table.


{{{highlight(y=1350*e^(2.07944t))}}}


691200 after 3 hours.