Answer:
The rock is 3.75 billion years ago.
Explanation:
Given that:
Half life = 1.25 billion years
1 billion years = 10⁹ years
So,
Half life = 1.25 × 10⁹ years
Where, k is rate constant
So,
The rate constant, k = 5.5452 × 10⁻¹⁰ years⁻¹
Initial amount [A₀] = 80 micrograms
Final amount ![[A_t]](https://tex.z-dn.net/?f=%5BA_t%5D)
= 10 micrograms
Using integrated rate law for first order kinetics as:
![[A_t]=[A_0]e^{-kt}](https://tex.z-dn.net/?f=%5BA_t%5D%3D%5BA_0%5De%5E%7B-kt%7D)
So,
So,
<u>The rock is 3.75 billion years ago.</u>
1. To be in par with society.
2. To become competent.
3. To become strong and confident.
4. To contribute something to
society.
5. To live a better life.
Answer:a piece of land almost surrounded by water or projecting out into a body of water
Explanation:
like Lizard Peninsula, England.
The Founding Fathers of the United States believed in all of the following except "<span>D. military buildup", since they were generally against the idea of a standing army since they thought it could lead to despotism.</span>
