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.
If you are subject to a nicotine drug test, it will likely assess for the presence of cotinine (rather than nicotine). For most nicotine users, cotinine could remain in your system for a period of 2.29 to 6.18 days.