What is 18/20 simplified

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

Ihonestly have no clue if it's each or none.

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