After a fire in an isolated farmhouse, firefighters found several small propane tanks and other strong evidence of a recently abandoned "meth lab." if what the firefighters found was a "meth lab," we would say:

Suppose you use three different scale to weigh a bag of organges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of organges is 2.153 lb. which of the following best decribes these results?