## Homework Statement

If a bacteria population doubles in 7 days, when was it half of its present population?

A=A0(1+i)^n

## The Attempt at a Solution

i= 100%=1

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Mark44
Mentor

## Homework Statement

If a bacteria population doubles in 7 days, when was it half of its present population?

A=A0(1+i)^n

## The Attempt at a Solution

i= 100%=1
If the bacteria population now is 500,000, when was the population 250,000?

what ?

Mark44
Mentor
What part of my question did you not understand? This problem is not a complicated one, and you don't need a calculator or any formulas to answer the question.

Have you ever seen $$P = e^{rt}$$ before?

Usually, I would recommend exponential growth/decay for bacteria situations.

Furthermore,

...This problem is not a complicated one, and you don't need a calculator or any formulas to answer the question.
"Doubling" and "halving" are very closely related!

yea i seen that formula before , so your saying it's impossible to complete the question?

Mark44
Mentor
No, I don't think he is. Can you answer my question: If the bacteria population now is 500,000, when was the population 250,000?

in your question would it be in 7 days and if so wouldn't it be in 3.5 days

Mark44
Mentor
No, you misunderstood. If the bacteria population was 500,000 today, when in the past was the population 250,000?

HallsofIvy