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krok68 [10]
3 years ago
15

Uranium-235, with a half-life of 713,000,000 years, decays to lead-207. If a rock sample is determined to have one-quarter of th

e uranium-235 content it had when it formed, the age of the rock sample can be estimated to be approximately ________ years old.
A) 1.4 billion.
B) 713 million.
C) 178 billion.
D) 178 million.
E) 28.5 billion.
Biology
1 answer:
eimsori [14]3 years ago
3 0

Answer:

A 1.43 billion years

Explanation:

is the answer

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