Question 541307
A certain kind of bacteria triples every 2 hours.
At 8:00 P.M., there was 153,090 bacteria counted in the petri dish.
How many were there at 6:00 A.M.?
:
153,090 after 14 hrs
:
Let Ao = initial amt at 6 AM
:
{{{Ao*3^(14/2)}}} = 153090
that's 14/2 so we have
{{{Ao*3^7}}} = 153090
Ao*2187 = 153090
Ao = {{{153090/2187}}}
Ao = 70 bacteria at 6 AM