Answer:
The estimated number of bacteria after 20 hours is 40.
Explanation:
This is a case where a geometrical progression is reported, which is a particular case of exponential growth and is defined by the following formula:
(1)
Where:
- Initial number of bacteria, dimensionless.
- Increase growth of the experiment, expressed in percentage.
- Time, measured in hours.
- Current number of bacteria, dimensionless.
If we know that
,
and
, then the number of bacteria after 20 hours is:



The estimated number of bacteria after 20 hours is 40.