Question

If the number of bacteria in a colony doubles every 230 minutes and there is currently a population of 100 bacteria, what will the population be 690 minutes from now?

Answer 1

800

Explanation:

In order to get the new population of bacteria in 690 minutes, you have to know how often the bacteria will divided in the time frame. So, you have to divide 690 minutes by 230 minutes.

• 690 min. ÷ 230 min. = 3 times

The bacteria will double its colony 3 times in 690 minutes.

• First division: 100 x 2 = 200 bacteria
• Second division: 200 x 2 = 400 bacteria
• Third division: 400 x 2 = 800 bacteria

Therefore, the population of bacteria will be 800 in 690 minutes.