First one to third and second to forth
Humanities, it best fits. Humanity is the study of human culture, such as literature, philosophy, and history.
The bacteria took more time to double from 1 cell to a bottle full of cells. Once the bottle was full, each cell in the full bottle doubled, causing an additional bottle to be filled in 5 minutes. Then the 2 full bottles doubled in the next 5 minutes, causing all 3 bottles to be full.
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