Thursday

July 31, 2014

July 31, 2014

Posted by **saya** on Sunday, May 6, 2012 at 1:18am.

E-coli, has a doubling period of 0.32 h. If a culture starts with 100 bacteria:

(a) Determine the equation for the number of bacteria, y, in x hours.

b) How many hours will pass before there are 450 bacteria in the culture?

- math 12 -
**~**, Sunday, May 6, 2012 at 6:09ama) y = 100 * 2^(x/0.32) (intuitively, after 0.32h, it doubles; after .64h, it quadruples, etc)

b) plug in y = 450, and solve for x

you should get x = 0.32*log(4.5)/log(2)

which is about 0.694h

**Related Questions**

Physics - The bacterium Escherichia coli (or E. coli) is a single-celled ...

Math - The growth rate of Escherichia coli, a common bacterium found in the ...

Math - The growth rate of Escherichia coli, a common bacterium found in the ...

Calculus - The growth rate of Escherichia coli, a common bacterium found in the ...

Calc - A common inhabitant of human intestines is the bacterium Escherichia coli...

statitics - E. Coli outbreak. Outbreaks of E. coli have occurred at a rate of 2....

Math - I'm not sure how to do this question 7. The growth of bacteria in culture...

calculus - A common inhabitant of human intestines is the bacterium Escherichia ...

Chemistry - The Heisenberg Uncertainty Principle: A student is examining a ...

Chemistry - The Heisenberg Uncertainty Principle: A student is examining a ...