Answer:
the answer is d
Step-by-step explanation:
the shape of it as well
Yes 0.034 is the correct answer
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:
F) 63
Step-by-step explanation:
Find the original total stories 10 + 8 + 16 + 8 = 42.
Original ratio of Mary's stories to total stories is 8/42 or 4/21.
Then form equation 4/21 = 12/x ; multiply both sides of 4/21 by 3.
4/21 = 12/63
The students need to write 63 stories to keep the ratio of Mary's stories to total stories the same.