Problema Solution
A biologist finds that the population of a certain type of bacteria doubles each half-hour. An initial culture has 100 bacteria. How long will it take for the number of bacteria to reach 6,400?
Answer provided by our tutors
100 x 2 = 200 (one )
200 x 2 = 400 (two)
400 x 2 =800 (three)
800 x 2 = 1600 (four)
1600 x 2 = 3200 (five)
3200 x 2 = 6400 (six)
6 x 30 min =180 min which equals three hours.
It will take three hours for the bacteria to reach 6400.