Question

An initial number of bacteria presented in a culture is 1,000. This number triples every 30 minutes. Write a function expressing the number of bacteria over time.

Answer 1

Tripiling time is
$A=P(3)^ \frac{t}{r}$
t=time elapsed
r=tripling time
P=initial amount


so


$A=1000(3)^ \frac{t}{30}$
when time is measured in minutes
if measured in hours then

$A=1000(3)^{2t}$ or$A=1000(9)^{t}$