Is this number written in scientific notation 4.8•100^7

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Ineed if you could explain and give me the answer you! this needs done

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