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.
Nicotine absorbed by the body through smoking, chewing and other tobacco use can linger for a longer period of time. Each person's unique metabolism also plays a role in how quickly the body gets rid of nicotine. In terms of testing, nicotine may be detectable up to 30 days after a person last used it.