Answer:
I think the answer is 120 days
Step-by-step explanation:
After 120 days, population will be 10000 times 3 which is equal to 30000
After another 120 days, population will be 30000 times 3 which is equal to 90000 and 90000 is under 100000
hence after 240 days, the population will still stay under 100000
