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:
C. more money
100 + 100÷100 - 100 = 100 + 1 -100 {apply BODMAS}
= 101 - 100 = 1
D not here
A-2 is not reasonable as it is not possible
C- bot possible
B- maybe
D- most reasonable