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### population of bacteria doubles in two hours

Posted: Mon Aug 01, 2016 2:38 pm
Hi, my son is going to six grades this year and he had pre homework before start school this fall. I usually, when have this type of question go directly to teacher to see if there something we are missing or question is incomplete, but class hasn’t start yet and I’m really curios about the response. Here is the question:

Numeric response
Generation time is the time it takes for a population of bacteria to double in number. If you begin with one X bacteria and one Y bacteria, what is the difference between the numbers of X bacteria and the number of Y bacteria produced in two hours?

They only give him a chart with a Generation Time in minutes from 10 to 30 minutes and X bacteria grow from 0 to 20 minutes and Y bacteria grow from 0 to 30 minutes.

### Re: opulation of bacteria doubles in two hours

Posted: Tue Aug 02, 2016 5:38 pm
Hi, my son is going to six grades this year...

"Generation time is the time it takes for a population of bacteria to double in number. If you begin with one X bacteria and one Y bacteria, what is the difference between the numbers of X bacteria and the number of Y bacteria produced in two hours?"

They only give him a chart with a Generation Time in minutes from 10 to 30 minutes and X bacteria grow from 0 to 20 minutes and Y bacteria grow from 0 to 30 minutes.
From your description, it sounds like they're saying that X doubles in twenty minutes and Y doubles in thirty minutes. So do the doublings and compare the results at two hours.

### Re: Population of bacteria doubles in two hours

Posted: Fri Aug 19, 2016 12:53 pm
Thanks for responding FWT!

That’s was my guess in the beginning, but after asking to different friends, coworkers and family I get confuse. My son was really close to the same conclusion as well.

Thanks again!