Question

If a bacteria population doubles in 7 days, when was it half of its present population?

Answer 1

I understand the half of its present population was 7 days ago

Answer 2

How can you prove it in mathematical form such asA=A_0(1+i)^n

Answer 3

\[P_n = P_0(2^{t/7})\]
then solve for when P_n = P_0/2
\[\frac{P_0}{2} = P_0 (2^{t/7})\]
\[\\2^{-1} = 2^{t/7}\]
\[-1 = \frac{t}{7}\]
t = -7

Answer 4

Thank you:)

Answer 5

yw