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In three years, 30% of a radioactive element decays. Find its half-life. (Round your answer to one decimal place.) yr
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In three years, 30% of a radioactive element decays. Find its half-life. (Round your answer to one decimal place.) yr

User Juanitogan
by
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2 Answers

4 votes

Answer:

5 years

Explanation:

in three years 30%

so in one year 10%

For half life time- 50%

so half life time years- 5 years..

User Scootklein
by
3.3k points
6 votes

Answer:5 years

Explanation:

User Javierpaniza
by
4.0k points
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