The decay of 40K has a half of 1.3 × 109 years.The age of the earth is estimated at 4.6 × 109 years.The decay of 40K is a major heat source for the earth's interior.Relative to today,how much more heat was produced by 40K in the early Archaeon era or 3.9 × 109 years ago?
A)2x
B)4x
C)6x
D)8x

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The Answer of The decay of 40K has a half of 1.3 × 109 years.The age of the earth is estimated at 4.6 × 109 years.The decay of 40K is a major heat source for the earth's interior.Relative to today,how much more heat was produced by 40K in the early Archaeon era or 3.9 × 109 years ago?
A)2x
B)4x
C)6x
D)8x

The Decay of 40K Has a Half of 1