Wednesday

March 4, 2015

March 4, 2015

Posted by **Tarah** on Sunday, November 21, 2010 at 9:08pm.

And....

An infectious strain of bacteria increases in number at a relative growth rate of 200% per hour. When a certain critical number of bacteria are present in the bloodstream, a person becomes ill. If a single bacterium infects a person, the critical level is reached in 24 hours. How long will it take for the critical level to be reached if the same person is infected with 9 bacteria? (Round your answer to two decimal places.)

- Math -
**Tarah**, Sunday, November 21, 2010 at 9:12pmthe answer to ther second one is 22.85

- Math -
**Mi**, Saturday, February 12, 2011 at 4:46am#1

70%=0.7 (because70%/100%=0.7)

The half-life 1/2=0.5

Equation: 0.7=0.5^(t/5730)

t=5730log0.7/log0.5=2949(years)

**Answer this Question**

**Related Questions**

physics - A wooden artifact is found in an ancient tomb. Its carbon-14 activity ...

Algebra - An artifact was found and tested for its carbon-14 content. If 74% of ...

Chemistry - An artifact has a carbon-14 to carbon-12 ratio that is one-fourth ...

Chemistry - An archeological artifact was subjected to radiocarbon dating. The ...

math - An artifact was found and tested for its carbon-14 content. If 79% of the...

math - An artifact was found and tested for its carbon-14 content. If 76% of the...

math - An artifact was found and tested for its carbon-14 content. If 83% of the...

math - An artifact was found and tested for its carbon-14 content. If 83% of the...

math - An artifact was found and tested for its carbon-14 content. If 76% of the...

math - An artifact was found and tested for its carbon-14 content. If 81% of the...