Answers: 2
Geography, 22.06.2019 14:40, thezbell
Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite
Answers: 2
Geography, 24.06.2019 18:00, laylaaaaah1603
Which of the following groups did not invade northern europe? ottomans celts vikings romans (i believe that it is either ottomans or celts)
Answers: 1
Study the map. Which regions were connected by the
Silk Road? Choose three correct answers.
E...
E...
Mathematics, 22.09.2020 14:01