The ratio of the abundance of 235U to 238U on Earth is 0.7%. If we assume that these twoisotopes existed in equal amounts when Earth was formed, calculate the age of Earth.The mean lifetimes of 235U and 238U are 1.02 × 10^9 years and 6.52 × 10^9 years, respectively. b)The ratio of the abundance of 235 U to 238 U on Earth is 0.7%. If we assume that these twoisotopes existed in equal amounts when Earth was formed, calculate the age of Earth.The mean lifetimes of 235 U and 238 U are 1.02 x 10 years and 6.52 x 10 years, respectively.

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The ratio of the abundance of 235U to 238U on Earth is 0.7%. If we assume that these two isotopes existed in equal amounts when Earth was formed, calculate the age of Earth. The mean lifetimes of 235U and 238U are 1.02 × 10^9 years and 6.52 × 10^9 years, respectively.