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A radioactive element decays exponentially at a rate of 0.13% each hour. Which of the following is true?

User Kidwon
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The amount of the element will decrease closer and closer to 0 as time goes on... I believe

User Andreas Zita
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It seems that you have missed the necessary options for us to answer this question, but anyway, here is the answer. If a radioactive element decays exponentially at a rate of 0.13% each hour, then the statement that is true is this: If there are 1,000 grams of the element, there will be 756.9 grams in two hours. Hope this helps.
User Eaglebearer
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