There will be 13,122 micro-organisms present at noon the next day
The number of hours between noon today and noon tomorrow is 24 hours.
The micro-organisms triple every 3 hours. The first thing you need to do therefore, is to find the number of 3 hour intervals in 24 hours.
= 24 hours / 3
= 8 three hour intervals
The micro-organisms started with 2 and will triple every 3 hour intervals.
There are 8 three hour intervals so the number of micro-organisms at noon the next day is:
= Beginning number of micro-organisms x 3 ^ number of three hour intervals
= 2 x 3⁸
= 13,122 microorganisms
In conclusion, there will be 13,122 micro-organisms.
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