Welcome to Westonci.ca, where finding answers to your questions is made simple by our community of experts. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

Mr. Rosencrantz says that he knows which class period has the 1943 penny. He reveals the following pieces of information:​ Pennies made since 1982 have a density of 7.2 grams/milliliter.​ Almost all pennies made before 1982 have a density of 8.8 grams/milliliter.​ The exception is pennies made in 1943, which have a density of 7.9 grams/milliliter.​ In which class period is the student who has the penny from 1943?