A culture of a certain bacteria doubles every hour at 9:00 a.m there were already 120 bacteria which equation represents the number of bacteria,n, at 8:00 a.m how many bacteria were there
To determine the number of bacteria at 8:00 a.m., we need to work backward from 9:00 a.m. We know that at 9:00 a.m., there were already 120 bacteria, and the culture doubled every hour.
To find the number of bacteria at 8:00 a.m., we need to determine how many times the bacteria doubled from 9:00 a.m. to 8:00 a.m.
Let's represent the number of bacteria at 8:00 a.m. as 'n'.
At 9:00 a.m., the number of bacteria was 120.
From 9:00 a.m. to 8:00 a.m., there is a time difference of 1 hour.
Since the bacteria doubles every hour, we can set up the equation:
n = 120 * (2)^(-1)
Simplifying the equation, we get:
n = 120 * 1/2
n = 60
Therefore, there were 60 bacteria at 8:00 a.m.