Answer: Option 'B' is correct.
Step-by-step explanation:
Let the initial concentration be
Let concentration after t= 90 hours be N
Since we have given that Sodium-24 has a half life of 15 hours i.e.
So, According to question,
As we know that
Hence, Option 'B' is correct.
Answer: -5 and 6
Answer:
Answer: 3(500+x)=1800