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25-02-2021
Mathematics

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The half-life of a radioactive material is 12.4 hours. How much of a 750.0 gram sample is left after 62.0 hours? (Round to the nearest hundredth of a gram)

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25-02-2021

Answer:

23 gram remains

Step-by-step explanation:

62÷12.4=5 half lives

after 5 half lives it has been reduced by 1/2×1/2×1/2×1/2×1/2=1/32

after 62 hours, 1/32×750=23 grams

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