Originally Posted by
chocolatelover Hi everyone,
Could someone please tell me if this is correct?
A cell divides into two cells every 20 minutes. The initial population of a culture is 60 cells
Find and expression for the number of cells after t hours:
(0,60) (20, 132)
132=600e^k20
ln2.2=lnk^20
ln2.2/20=20k/20
k=ln2.2/20
y(t)=60e^ln2.2/20t
Find the number of cells after 8 hours:
y(8)=60e^ln2.2/20(8)
Find the rate of growth after 8 hours:
Isn't that just -2.2% but it can't be negative. ???????????
When will the population reach 20,000 cells?
20000=60e^-2.207t
t=-2.63 This can't be right. It can't be a negative number, right?
Thank you very much