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 is removed from your body within 4 hours after the last exposure. Nicotine levels drop to 50% after 30 min., 25% after 1 hour. After 3 weeks 99.9% is out of your bodyâ¦. Most people stop experiencing cravings within 5 days of cessation. Nicotene is almost gone out of your system in 72 hours at which time you may feel the craving the most so hold on.