# Math Help - How many microbes after 4 hours ,rate of growth...?

1. ## How many microbes after 4 hours ,rate of growth...?

Moe indicated that he would like to study how the microbes that influence the brewing process grow without any irradiation attempts.What Moe discovered was that under ideal conditions,the number of microbes in the flask of brew grows at a rate of 65.3%per hour.Suppose that one particular experiment begins with 8000 microbes present in a brew flask and that these microbes are allowed to incubate without any irradiation interventions.How many microbes will be present after 4 hours and what is the rate of growth of the microbe population exactly 4 hours after the experiment starts.

2. $A(t) = A_0e^{kt}$

$A_0 = 8000$

When $A(1) = (1+0.653)A_0$

Use this to find k

When you've found k use the equation at the top of this post to find A(4)

3. Thanks!

4. can you pls elaborate on finding k?
When ..?

How are we finding k from here?