Question

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

Answer 1

[AI-generated answer — Bot GPT 3.5]

Let's denote the number of bacteria at 8:00 a.m. as n.

Since the bacteria doubles every hour, at 9:00 a.m., there were 120 bacteria, which means that at 8:00 a.m., the number of bacteria was halved. In other words, at 9:00 a.m., there were twice as many bacteria as at 8:00 a.m.

Therefore, the equation representing the number of bacteria at 8:00 a.m. would be:

n = 120/2

n = 60

So, there were 60 bacteria at 8:00 a.m.