I need help fast I don't understand this at all.

Answer:
80. The correct answer is 80 days
Step-by-step explanation:
It shows your really small with t over 80
Answer:
population x time = 50 x (2) time divided by 80
so what I would do is...
50 x 2 then 100/80 is 1.25 move the decimal and round to get 20 then double to get 40 days but i tried and it time for me to eat