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.
The length of time nicotine can be detected depends on the type of  testing used. Blood tests can detect nicotine up to 10 days after  quitting, urine tests detect 3-4 days, â¦ saliva tests up to 4 days,  and hair tests can detect nicotine up to 3 months after quitting.