Determine that 57 percent of the original uranium

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Reference no: EM133361919

You are dating Moon rocks based on their proportions of uranium-238 (half-life of about 4.5 billion years) and its ultimate decay product, lead.

Question 1: Find the age for a rock for which you determine that 57 %% of the original uranium-238 remains, while the other 43 %% has decayed into lead. Express your answer in billions of years to two significant figures.

Question 2: Find the age for a rock for which you determine that 71 %% of the original uranium-238 remains, while the other 29 %% has decayed into lead. Express your answer in billions of years to two significant figures.

Reference no: EM133361919

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