PLSPSLSPLS HELP, ANYONE
...
Answers: 1
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 07:30, natalie2sheffield
Horizon a is also sometimes called a. topsoil b. subsoil c. bedrock d. weathered bedrock
Answers: 2
Mathematics, 12.10.2019 04:30
History, 12.10.2019 04:30
English, 12.10.2019 04:30
History, 12.10.2019 04:30