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9 July, 16:06

An element with mass 430 grams decays by 27.4% per minute. How much of the element is remaining after 19 minutes, to the nearest 10th of a gram?

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  1. 9 July, 19:02
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    First, we subtract 27.4 from 100, which gives us 72.6. After each generation, we will have 72.6% of the last generation. Now, we do 430 *.726^19. This equals 1.0 grams.
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