A certain kind of bacteria increase their number at a constant rate of 100% every 2 minutes. If there are 10 bacteria initally, how many bacteria will there be after 12 minutes?
plx show the step
f.3 maths percentages (urgent)
2007-10-19 5:30 am
回答 (2)
2007-10-19 5:35 am
✔ 最佳答案
There are six 2-minute periods with 12 minutes. So, number of bacteria after 12 minutes
= 10 X (1 + 100%)6
= 10 X (2)6
= 640
參考: Myself~~~
2007-10-19 5:40 am
The first two minutes, there are 10 bacteria,
fourth minutes, 20
sixth minutes, 40
eighth minutes, 80
tenth minutes, 160
twelfh minutes, 320
fourth minutes, 20
sixth minutes, 40
eighth minutes, 80
tenth minutes, 160
twelfh minutes, 320
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