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>
The question
does not pose any options to choose from, I found the exercise and here are the
options:
<span>
a. Determining what clothes to wear to the prom
b. Deciding whether to scream "fire" in a crowded movie theater
c. Determining how she should cook macaroni and cheese
d. Deciding whether she should sleep at night</span>
<span>
The correct choice is "A", Determining what clothes to wear to the
prom".
All the other options lack the element of pressure from peer groups or
social pressure. Prom night is the occasion when everyone wants to get other's
attention and for that sole reason large amount is money is also spent.</span>
The findings showed that the major causes of poor service delivery are councilor interference and political manipulation, corruption and lack of accountability and transparency, inadequate citizen participation, poor human resource policy, failure to manage change, lack of employee capacity, poor planning, and poor
Answer:
The answer is C. (The supply of luxury items like jewelry decreases).
Explanation:
Answer:
Using school achievement as an escape from the stress of home.
Explanation:
As per the given description, the major cause behind Alisha's score remaining high despite the problems at her home is that she had been most likely 'using school achievement as a kind of escape from the stress of her home'. The school's performance and activities turned out to be a stress-buster for her that relieved her as well as kept her motivated to perform effectively and achieve her desired goal. However, <u>the situation at home inculcated a lot of pressure and stress to her yet the activities at school did not let her productivity go down and acted as an escape for her to overcome the stressful situations of her home</u>.