Question

PLEASE HELP!!!!WILL GIVE A MEDAL AND BECOME FAN!!!

A certain bacteria population obeys the population growth law. Find the growth constant if the population at time t=t1 is 2 and the population at time t=t2 is 10.

the answer choices are:
a) r=ln(5)/(t2-t1)
b) r=ln(20)/(t2-t1)
c) r=ln(1/5)/(t2-t1)
d) r=(t2*ln10)/(t1*ln2)
e) r=ln(5)/(t1-t2)
f) none of the above

Answer 1

I'm not sure if this is using doubling time or not

Answer 2

Well the general population growth equation is \[P=P _{0}e ^{rt}\]so what you want to find is r. Let's use what is given to you. \[P=P _{0}e ^{r(tf-ti)}\]solve for r