Which scale is used to describe the magnitude of an earthquake?

Name the part of the the brain labeled "e".

Me the formula cacl2 represents the compound

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?