krypton-85 has a half life of 10 years. What percentage of 85kr produced from nuclear testing in 1959 still remains today?
Thank you for the opportunity to help you with your question!
To solve this problem, you can use a 'half-life' equation:
t=amount of time that passed=2015-1959=56 years
Now you can calculate the percentage remaining (Pr)=?
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