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>
Every time you go to the grocery store, you try to wait in the shortest line. but the lines always seem to be roughly the same length. Everyone else is trying to choose the shortest line, too.
Microeconomics studies the business behavior and decision-making of individuals, households, or firms. More specifically, this area of economics focuses on the interactions between those who buy products (consumers) and those who sell them (producers). They help describe general patterns of behavior.
High-income countries have built grocery stores as a living standard advantage for decades, so even with high growth rates, low-income countries can struggle to catch up.
Learn more about grocery stores at
brainly.com/question/23103804
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Answer:
The plains tend to be very easy for early settlements to bring about agriculture, mobility, and mild weather conditions that helps early civilization grow. The negative impact of most plains come from it's lack of ability to trade easily in later generations, without water access
