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# \$0.25In 1964, paleontologist discovered...

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In 1964, paleontologist discovered the bones of a new species of dinosaur. The age of the dinosaur was estimated using potassium-40dating of rocks surrounding the bones. Alanysis of these rocks indicated that 63.6% of the original amount of potassium-40was still present. The decay model for potassium-40-is A=A0e -0.5292t where t is in billions of years. Let A=0.636 AO in this decay model and estimate the age of the bones of the dinosaur.

The bones are approximately----- billion years old.

(Type an integar or decimal rounded to four decimal places as needed).

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Billion years old
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• Posted on Feb. 16, 2012 at 04:57:15AM
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Preview: ... = 0.636 A Putting values => 0.636 A =A   * e -0. ...

The full tutorial is about 40 words long .

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• Posted on Feb. 16, 2012 at 06:04:11AM
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Preview: ... 25.14= 40*e^-0.5292t taking log ...

The full tutorial is about 9 words long .

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• Posted on Feb. 16, 2012 at 06:06:13AM
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