A culture of a certain bacteria doubles every hour At 9:00 am, there were already 120 bacteria. Which equation represents the number of bacteria, n, at 8:00 many bacteria were there? (1 point)
O pi/2 = 12 , at 8:00 am, there were 240 bacteria
O 91/9 = 120 , at 8:00 am, there were 60 bacteria
O 2n-1 at 8:00 am, there were 60 bacteria
O 2n 120, at 8:00 am, there were 240 bacteria