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Filename: drivers/Session_files_driver.php
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Function: require_once
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Backtrace:
File: /home/answnniz/solutionspile.com/index.php
Line: 367
Function: require_once
A sample of uranium- 238 has a mass of 500 grams. If uranium- 238 decays into thorium234 with a half-life of 4.468 billion years, how much thorium- 234 will be present after 2.5 billion years?
