Answer: There will be 0.04 grams will be left in the sample after 20 years.
Step-by-step explanation:
Since we have given that

Here, Initial amount of radioactive substance = 400 grams
We need to find the amount of substance that will be left in the sample after 20 years.
So, t = 20 years
So, it becomes,

Hence, there will be 0.04 grams will be left in the sample after 20 years.
Answer:
Can you give me the name of your assignment paper please?
Step-by-step explanation:
Answer:
2 2/5
Step-by-step explanation:
Answer:ed
Step-by-step explanation:
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