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# help

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An element with mass 590 grams decays by 19.5% per minute. How much of the element is remaining after 15 minutes, to the nearest 10th of a gram

Apr 6, 2020

#1
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If it decays 19.5% per minute, that means that 100%-19.5%= 80.5% of the element remains after each minute. If it decays for 15 minutes, that means the mass would be calculated by 590*80.5^15= 22.8 grams to the nearest 10th.

Hope it helps!

Apr 6, 2020
#2
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Or... you can check this out:

https://brainly.in/question/2810180

Apr 6, 2020
#3
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Neither of those explanations are correct...

The first one states that you multiply 19.5% by 15 to find the total amount of decay. But in the problem you need to raise 19.5% to the 15th power instead of multiply it by 15...

For the second one, decay doesn't work at a common rate...decay is taking off a chunk of the remainder of what's left not of the original total.

Hope this helps!

HELPMEEEEEEEEEEEEE  Apr 6, 2020
#4
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Sorry! This one has the same answer as you, and I believe it is correct:

https://brainly.com/question/14994829

Apr 6, 2020
#5
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Yep

HELPMEEEEEEEEEEEEE  Apr 6, 2020