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.
How Long Does Nicotine Stay in Your Saliva. A vast bit of the nicotine will be released from the structure within twenty minutes in the wake of smoking. Regardless, it can be perceived in the salivation for around 24 hours after the last smoke.