The population of a bacteria culture doubles every 2 minutes. Approximately how many minutes will it take for the population to grow from 1,000 to 100,000 bacteria
Choose the correct choice from the following:
A) 10
B) 12
C) 14
D) 16
E) 18
The question basically asks how many minutes it takes for a population to increase by factor 100 (100,000 / 1,000 = 100).   Now you know that every two minutes the population doubles, i.e. is multiplied by 2. So the equation becomes:   2^x &gt;= 100, where x represents the number of times the population doubles. A lot of people remember that 2^10 = 1,024. Hence, 2^7 =128, i.e. the population has to double 7 times.   Since it takes the population 2 minutes to double once it takes 7*2= 
<gadget id="calculator">7*2</gadget>
<output>14</output>
14 minutes to double 7 times.   Thus, solution 14= 14 is correct.
<result>C</result>
The population of a bacteria culture doubles every 2 minutes. Approximately how many minutes will it take for the population to grow from 1,000 to 100,000 bacteria