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..
Asker's rating. Report Abuse. You have to be 18 at least to work at Petco, but when you're 13 you might be able to pull off working at a store in the mall or at the movies. You should wait until you're 14 or 15...but if you really want to you could just mow lawns over the summer or babysit. Source(s): Me.