posted by Ana .
A colony of germs grows exponentially. It starts at 500 germs. After 8 minutes there are 600 germs. When will there be 1000 germs?
600=500e^a8 where a is a constant.
solve for a in the first equation:
take ln of both sides
now put that in the second equation
take ln both sides
x=22.4 min from when it was 600,or 30.4 min from the start.
check my work