I have totally forgotten how to do these questions, so I would really like to check my work...
A bacteria culture starts with 3000 bacteria and grows to a population of 12000 after 3 hours.
a) Find the doubling period.
b) Determine the number of bacteria after 8 hours.
what i did was...
a) 12000 = 3000r^3
and got r=1.59
Is that right?