Answer;
[tex]B\text{ = 951}[/tex]Explanation;
Here, we want to get the number of bacteria that will be present after 4 hours
What we have to do here is to substitute 4 for t in the equation of the model given
Mathematically, we have this as;
[tex]\begin{gathered} B=100e^{0.563t} \\ B=100e^{(0.563\times4)} \\ B\text{ =950.67 = 951} \end{gathered}[/tex]