Question

A colony of bacteria is growing exponentially according to the function below, where t is in hours. What will the approximate number of bacteria be after 7 hours?A.270B.1082C.635,818D.45,674

Answer 1

we have the exponential function

$B(t)=4e^{0.8t}$

For t=7 hours

substitute

$\begin{gathered} B(t)=4e^{0.8*7} \\ \\ B(t)=1,082\text{ bacteria} \end{gathered}$

The answer is option B