Answer:
Step-by-step explanation:
We can use the decay equation:

- M(0) is the initial mass
- M is the mass after t (1000 days) time
- λ is the decay constant
But:

So, we can rewrite the initial equation:

Now, we just need to solve it for t(1/2):


I hope it helps you!
Answer: b
Step-by-step explanation:
Got it right
Answer:
Mean=Sum of all values/number of observation
=3+2+4/3
=9/3
=3