Radium decomposes at a rate proportional to the amount present. If a quarter of the original amount disappears after 900 years, what is the percentage lost in 75 years?

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Kyra Ceelin Baldovino 2020 年 7 月 29 日

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https://jp.mathworks.com/matlabcentral/answers/572104-radium-decomposes-at-a-rate-proportional-to-the-amount-present-if-a-quarter-of-the-original-amount

回答済み: Image Analyst 2020 年 8 月 7 日

How do I solve for this using matlab?

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Sriram Tadavarty 2020 年 7 月 29 日

Hi Kyra,

May i know what have you tried so far? Where did you get struck? What is the issue you are facing to solve this?

Also, provide your question in the description as well.

Regards,

Sriram

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Answer 1

Rohit Pappu 2020 年 8 月 7 日

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https://jp.mathworks.com/matlabcentral/answers/572104-radium-decomposes-at-a-rate-proportional-to-the-amount-present-if-a-quarter-of-the-original-amount#answer_476548

As per my understanding of your question, you would like to solve a first order differential equation using MATLAB. This is possible using the dsolve function of Symbolic Math toolbox. Additional documentation on solving first order differential equations can be found here.