Monday

April 21, 2014

April 21, 2014

Posted by **Amy** on Monday, December 21, 2009 at 12:34am.

a)if there are 8 bcteria initially, write an equation that models the number of bacteria present after x 12 hours.

b)How many bacteria will be present after 5 days?

by using this formula N(t)=N0(1+r)2

The 0 is a small o on the bottom. i could be wrong with the formula.

- Pre-Calculus -
**Reiny**, Monday, December 21, 2009 at 1:24amSince this is a "doubling" process, I would use

N(t) = 8(2)^(t/12) where t is in hours

b) so after 5 days or 120 hours,

N = 8(2)^120/12

= 8192

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