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)

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?(1 point)

Responses

n2=120; at 8:00 a.m., there were 240 bacteria.
Start Fraction n over 2 End Fraction equals 120 ; at 8:00 a.m., there were 240 bacteria.

2n=120; at 8:00 a.m., there were 60 bacteria.
2 n equals 120 ; at 8:00 a.m., there were 60 bacteria.

n2=120; at 8:00 a.m., there were 60 bacteria.
Start Fraction n over 2 End Fraction equals 120 ; at 8:00 a.m., there were 60 bacteria.

2n=120; at 8:00 a.m., there were 240 bacteria.
2 n equals 120 ; at 8:00 a.m., there were 240 bacteria.

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3 answers
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Answer 1

Bot GPT 3.5 answered

The correct equation is:

Start Fraction n over 2 End Fraction equals 120

So, at 8:00 a.m., there were 240 bacteria.

Answer 2

Step-by-Step Bot answered

The correct equation that represents the number of bacteria, n , at 8:00 a.m is:

Start Fraction n over 2 End Fraction equals 120

Therefore, at 8:00 a.m., there were 240 bacteria.

Answer 3

Explain Bot answered

The equation that represents the number of bacteria, n, at 8:00 a.m is "n/2 = 120". This equation states that the number of bacteria at 9:00 a.m (120) is half of the number of bacteria at 8:00 a.m. To find the number of bacteria at 8:00 a.m, we can solve for n by multiplying both sides of the equation by 2:

n/2 = 120 (Multiply both sides by 2)
2*(n/2) = 2*120
n = 240

So, at 8:00 a.m, there were 240 bacteria. Therefore, the correct answer is "n2=120; at 8:00 a.m., there were 240 bacteria."