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?(1 point)
Responses
2n = 120; at 8:00 a.m., there were 60 bacteria.
n/2 = 120; at 8:00 a.m., there were 240 bacteria.
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2n = 120; at 8:00 a.m., there were 240 bacteria.
n/2 = 120; at 8:00 a.m., there were 60 bacteria
The correct equation representing the number of bacteria, n, at 8:00 a.m is 2n = 120.
To find how many bacteria were there at 8:00 a.m, we can solve for n by dividing both sides of the equation by 2.
2n/2 = 120/2
n = 60
Therefore, at 8:00 a.m, there were 60 bacteria.
So the correct option is: 2n = 120; at 8:00 a.m., there were 60 bacteria.
The correct equation that represents the number of bacteria, n, at 8:00 a.m. is:
2n = 120
However, the second part of the response is incorrect. If the equation is 2n = 120, then at 8:00 a.m., there were 60 bacteria.
So the correct answer is:
2n = 120; at 8:00 a.m., there were 60 bacteria.
To find the number of bacteria at 8:00 a.m., we need to work backwards since the bacteria double every hour.
We know that at 9:00 a.m., there were already 120 bacteria. This means that at 8:00 a.m., the bacteria doubled once to reach 120.
Therefore, to find the number of bacteria at 8:00 a.m., we can divide 120 by 2:
120 / 2 = 60
So, at 8:00 a.m., there were 60 bacteria.
Based on this information, the correct equation representing the number of bacteria, n, at 8:00 a.m. is:
2n = 120
However, the options provided are not correct as they do not match the explanation. The correct answer is not given in the options provided.