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
= 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:
The vice president
Explanation:
The 25th amendment was made to solve the problem of who becomes president if the current president is unable to fulfill their duties. The amendment states, "if the President becomes unable to do his job, the Vice President becomes the President or Acting President." With "acting president" means that the vice president will only have the title/power for a limited time. The 25th amendment may be invoked if the president dies or is unconscious for an amount of time. The first will result in the vice president becoming president and the latter will cause the vice president to become the acting president.
The 25th amendment was recently invoked when President Biden underwent a medical procedure. Kamla Harris then became acting president for a few hours.
By not specifying if it is am or pm
Federalist no. 10 is an essay that James Madison as the 10th as the Federalist Papers, a series of essays initiated by Alexander Hamilton
Answer:
The answer is identical twins. Studies examining certain traits are helping to clarify our understanding of the effects of nature and nurture. for example, because<u> identical twins</u> have the same genes, researchers often use them in studies that examine the relative influence of environment and heredity on these traits.
Explanation:
In the biological world, nature is a characteristic that is present in an organism due to the genetic inheritance of the organism from his/her parents. Nurture are the characteristics that are brought in an organism due to the impacts of the environment.
To study the differences between nature and nurture, twins are used for researches. As identical twins have the same genes so researches made on them can clearly determine the influence of the genetic traits as well as the environmental factors on an organism.