BUN-to-creatinine ratio - Definition. [ 1 1] Urea and creatinine are nitrogenous end products of metabolism. 2  The normal range of urea nitrogen in blood or serum is 5 to 20 mg/dl, or 1.8 to 7.1 mmol urea per liter. 3  The normal serum creatinine (sCr) varies with the subject's body muscle mass and with the technique used to measure it.
Direct from petco.com: The minimum age for working in our PETCO stores in 18 years, with the exception of Alaska in which the minimum age requirement is 16 years.. Direct from petco.com: The minimum age for working in our PETCO stores in 18 years, with the exception of Alaska in which the minimum age requirement is 16 years..
  Answer     if you have a workers permit you can work at some places at 15 and 1/2   i think mc donalds will hire you at 15     but mostly you must be â¦ sixteen to work. 68 people found this useful. usually 18. Most states and cities require you to be at least 14 to get a work permit and to have a job. Kids are allowed to work in family businesses and farms. And even then the t â¦ ypes of jobs and hours are restricted.