A population of 500 bacteria doubles every 30 minutes. How many bacteria are there after 2 hours?
Answer
8000 bacteria
How to solve it
1
Start: 500
2
30 min: 1,000
3
60 min: 2,000
4
90 min: 4,000
5
120 min: 8,000
Hints
2 hours = 4 periods of 30 minutes
Double 4 times