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:
Explanation:The farmers get the right value of their products if the agro-based industries are flourished and they consume more raw materials.It directly supports the improvement of the living standard of farmers.so,we should use the agricultural raw materials produced in our country and expand the industries bases.
The answer to the question is: the Economic Recovery Tax Act of 1981. It is known as ERTA or Kemp-Roth Tax Cut. It encourages economic growth though reducing individual tax rates by twenty-five percent, the charging of depreciable properties, incentives from businesses and other incentives.
Answer:
PLEASE GIVE BRAINLIST
Multicultural things are made up of or include more than one ethnic group or culture. Your multicultural food fair might include dishes from Chile, Syria, Sudan, and France. ... Multi- means "many," and cultural comes from the Latin cultura, "cultivating."
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Appeasement gave Britain and its allies time to rearm, and at the same time allowed its citizens time to slowly adjust and accept the impending reality of brutal conflict with Nazi Germany.