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>
Answer:assimilation
Explanation: assimilation is a term used by Piaget to refer to how children associate new information with their pre-existing knowledge. So when they learn something new they try to relate it to what is already preserved in the pattern of knowledge in their mind. It this process thy don't change their schemas (pattern of information ) but they just relate it to what they already know . Accomodation is when they change the existing Information to fit in the new information.
Talmadge and some southern Democrats opposed the “New Deal” proposal on the grounds of: fear of the federal government interfering in state and local matters, not wanting an end to white supremacy ideals (not wanting African Americans to receive equal pay to Whites), not wanting the government to increase spending, and not wanting the government to offer higher wages to laborers taking away workers from the local landowners.
