Answer:
2.71 hours are required for the number of bacterias grouper are tripled.
Step-by-step explanation:
The number of bacterias can be given by the following exponential function:

In which
is the number of bacterias at the time instant t,
is the initial number of bacterias and r is the rate for which they grow.
After 1 hour the crop has reached ( 3/2 ) N₀ Bacterias.
This means that
. With this information, we can find r.



To find r, we apply ln to both sides


Determine the time required for the number of bacterias grouper are tripled.
This is t when 



Again, we apply ln to both sides



2.71 hours are required for the number of bacterias grouper are tripled.