If a species of bacterium can divide once every 20 minutes, then calculate how many bacteria there would be after 1 day
The number of bacteria double every 20 minutes.
In one day, 24 hours, 1440 minutes: 1440 ÷ 20 = 72; the amount will be double 72 times.
The original will be doubled: 2^72 times; a very large number.