Question

can someone help me with my last question?????

Answer 1

what was your question?

Answer 2

Scientists estimate Earth's age to be 4.6 billion years. Samarium has a half-life of approximately 106 billion years. From the present date, approximately how many more years must pass before a sample of samarium that was created at the beginning of Earth's history contains 25 percent of the original parent material?
10 billion

26 billion

100 billion

206 billion

Answer 3

100 billion

Answer 4

thank you