algebra 2
element x has a half life of 90 seconds. How much of a 100 gram sample of element x is left after half an hour
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The half life of element x is the amount of time it takes for half of a sample of the element to decay or transform into something else. Since the half life of element x is 90 seconds, after half an hour (1800 seconds) only 1/8th (1/2 * 1/2 * 1/2 * 1/2) of the 100 gram sample will remain. That is, 12.5 grams of element x will remain after half an hour.
