# A colony of bacteria is grown under ideal conditions in a lab so that the population increases exponentially with time. At the end of 3 hours there are 10,000 bacteria. at the end of 5 hours there are 40000. How many bacteria were present initially?

##### 1 Answer

May 16, 2016

#### Explanation:

The law of exponential grow is written as

When

so

and for

Dividing side by side both equations

Now