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>
The answer to the question above is letter B, The name for reimbursement accounts for qualified medical and child care expenses is Flexible spending accounts. child care for children ages under 13 who are physically or mentally incapable of self-care.
Chavez is most likely in favor of the Cannon-Bard Theory, as he's advocating that emotions can not be associated to specific physiological changes. When he points out that the autonomic nervous system is functioning simultaneously and isn't the cause for the variation in emotional responses, he's most likely talking about the Cannon-Bard Theory.
Cross-sectional research involves the comparison of two or more pre-existing groups of people under the same criteria.
<h3>What is
Cross-sectional research?</h3>
A cross-sectional study is a form of observational study in medical research, social science, and biology that analyzes data from a population, or a representative subset, at a specific point in time—that is, cross-sectional data.
Cross-sectional studies are used to analyze a population's illness burden or health requirements, and they are especially effective in informing health resource planning and allocation. A cross-sectional survey can be used to measure the burden of a certain disease in a defined population.
Cross-sectional studies capture a single point in time, gathering data from a research group at a particular point. This is often done with a single survey, questionnaire, or observation.
To know more about Cross-sectional research follow the link:
brainly.com/question/12719194
#SPJ4
If you are studying the impact of a new type of teaching curriculum in the psychology classroom, the classroom where the old curriculum is still taught is considered the control group.
It teaches and examines essential ideas of human behavior which can form mastered. Psychology additionally facilitates instructors to use measurements and assessments efficaciously, to higher gauge wherein students are in their learning.
It allows an instructor how to gain knowledge of processes that ought to be initiated, a way to motivate, and a way to memorize or research. It facilitates teachers to manual the scholars in the proper course a good way to canalize students' competencies in the proper path. It informs a trainer, approximately the nature of the learners and their possibilities.
Teaching and getting to know psychologists develop and apply theories of human improvement to understand men or women gain knowledge of styles and inform the academic system. They paint with folks that are talented and those who have mastering disabilities. Their abilities are crucial as schools paint harder to ensure academic fulfillment.
Learn more about Psychology here:
brainly.com/question/12011520
#SPJ4
