Which function represents the following graph?

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

What’s the answer ? use the picture to see the problem

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt