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.
Depending on how many cigarettes you are smoking every day, you may have either a small or large amount of nicotine in your system. As a guide, nicotine usually lasts between 2 to 14 days in the urine, 2 to 15 days in the blood, 1 to 4 days in the saliva, and between 30 to 90+ days from last use of nicotine products.