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)
2n=120
; at 8:00 a.m., there were 240 bacteria.
n
2
=120
; at 8:00 a.m., there were 60 bacteria.
n
2
=120
; at 8:00 a.m., there were 240 bacteria.
2n=120
; at 8:00 a.m., there were 60 bacteria.
You are wrong
2n=120 at 8 am 60 Bacteria
To find the equation that represents the number of bacteria, n, at 8:00 a.m., we need to backtrack one hour from the given information. Since the culture doubles every hour, we can divide the total number of bacteria by 2 to find the number at the previous hour.
At 9:00 a.m., there were already 120 bacteria.
So, at 8:00 a.m., the number of bacteria would be 120 divided by 2, which is 60.
The correct equation is:
n/2 = 60
Therefore, the equation that represents the number of bacteria, n, at 8:00 a.m. is "n/2 = 60."
As a result, at 8:00 a.m., there were 60 bacteria.
The equation that represents the number of bacteria, n, at 8:00 a.m is 2n = 120. At 8:00 a.m., there were 60 bacteria.
which one
To determine the equation that represents the number of bacteria, n, at 8:00 a.m., we need to consider the given information.
We know that the culture of bacteria doubles every hour. Therefore, from 8:00 a.m. to 9:00 a.m., one hour has passed.
Given that there were already 120 bacteria at 9:00 a.m., we can infer that at 8:00 a.m., there would have been half the number of bacteria since one hour has passed.
To represent this mathematically, we need to divide the number of bacteria at 9:00 a.m. by 2.
Let's calculate the equation and the number of bacteria:
n/2 = 120
To find n, we can multiply both sides of the equation by 2:
2 * (n/2) = 120 * 2
n = 240
Therefore, the equation that represents the number of bacteria, n, at 8:00 a.m. is:
2n = 120
And at 8:00 a.m., there were 240 bacteria.
So, the correct answer is:
2n=120; at 8:00 a.m., there were 240 bacteria.