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Geography, 22.06.2019 14:40
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
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Geography, 24.06.2019 11:20
The availability and cost of blank is a major component of a region's overall cost of living.marking brainliest answer btw only one answer -health care -transportation -housing -education its 20 pts
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Astudent in a skill or trade training program who is learning by gaining experience is a(n) a. mentor b. volunteer c. colleague d. apprentice
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