An Irrational Number is a real number that cannot be written as a simple fraction.
1 The nicotine will totally be gone within 1-3 days after your last using tobacco.  In urine: The urine test normally can detect nicotine level within 3-4 days after the last time you use tobacco. However, if you often smoke or you are passive smokers, nicotine can stay for a period of 15 to 20 days in urine.
Report This | Share this:How long before Nicotine is out of system?Nicotine has a half-life in the human body of 2 hours (although it can range from 1 to 4 hours in different individuals). The average smoker has a blood nicotine concentration of about 40 ng/ml after an evening cigarette.icotine has a half-life in the human body of 2 hours (although it can range from 1 to 4 hours in different individuals). The average smoker has a blood nicotine concentration of about 40 ng/ml after an evening cigarette.