suppose that the concentration of a bacteria sample is 70,000 bacteria per milliliter. if the concentration triples in 4 days, how long will it take for the concentration to reach 112,000 bacteria per milliliter?
Hi this guy, This is a you tube clip that I found for you. don't worry about part c, especially if you haven't done any calculus yet. but part d is almost the same as your questions. Go through it and try to understand.
I did your question and got 41.07 hours. I think that's about 41 hours and 4 minutes. See if you can work it out and if you can't post again to get some more help.
+118690 
