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.
Most people can expect nicotine to be fully eliminated from their system within 24 hours. This is due to the fact that following ingestion of nicotine, an enzyme known as cytochrome P450 rapidly metabolizes it in the liver, along with UDP-glucuronosyltransfease (UGT), and flavin-containing monooxygenase (FMO).