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Selenium-83 has a half-life of 25 minutes. How much of a 2 gram sample will remain to the nearest thousandth after 70 minutes.
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You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?
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Selenium-83 has a half-life of 25 minutes. How much of a 2 gram sample will remain to the nearest th...
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