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January 27, 2015

January 27, 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)

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