Answer:
Hey, the anwer is 243.
Explanation:
The math equation for this is:
ORIGINAL POPULATION x
This is because the original population will triplicate 4 times.
Original population: 3
After first week: 9
After second week: 27
After third week: 81
After fourth week: 243
Is the same that multiplying 3 x 3 x 3 x 3 x 3