Sodium 24 has a half-life of approximately 15 hours. Consider a sample of 100 milligrams.
Write an equation to determine the number of milligrams remaining after t days. Show all work.
How many milligrams are remaining after 45 hours? Show all work.
How long will it be until there are 5 milligrams remaining? Show all work.
Answers
The decay equation is: N(t) = [tex]N0 * (1/2)^(t/T),[/tex] where N0 is the initial amount, T is the half-life, and t is time.
How to find the milligrams are remaining after 45 hoursFor 45 hours, t = 45/24 = 1.875 days.
Plug values into the equation:
N(1.875) = [tex]100 * (1/2)^(1.875/0.625)[/tex]
= [tex]100 * (1/2)^3[/tex] = 12.5 milligrams.
To find when there are 5 milligrams left,
5 = [tex]100 * (1/2)^(t/0.625).[/tex]
Solving for t: t = 0.625 * log2(100/5)
= 0.625 * 4.322 = 2.70 days.
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Related Questions
shyla's resarch shows that 8 empty cans make 1/4 pound of aluminum. shayla wants to know how many cans it take to make 5 pounds of aluminum.
Answers
If 8 cans is 1/4 then 8 x 4 is 32 which is 4/4 or 1. 32 x 5 = 160
Answer:
160 cans
Answer:
If 8 cans is 1/4 then 8 x 4 is 32 which is 4/4 or 1. 32 x 5 = 160
Explanation:
160 cans
What issues may arise if nominal gross domestic product was used instead of real gross domestic product?
Answers
Answer: See explanation
Explanation:
Real gross domestic product is simply refered to the economic output of a particular country which has been adjusted for price changes as inflation was taken into consideration.
Nominal gross domestic product is the measurement of the gross domestic product of a particular country which makes use of current prices, and isn't inflation adjusted.
The issue that may arise when nominal gross domestic product was used instead of real gross domestic product is that the nominal GDP leads to the inflation of the growth figure in the economy. This is because the nominal GDP doesn't take inflation into effect.
This leads to the misleading of the GDP since there'll be an overstatement of the GDP even though it was actually a rise in the inflation rate for the particular economy.
The introduction of the antibiotic methicillin was once successful in destroying Staphylococcus bacterial infections. More recently, strains of Staphylococcus bacteria have undergone mutations that cause the bacteria to be resistant to the action of methicillin, leading to increased incidence of the disease MRSA (methicillin-resistant Staphylococcus aureus).
How would the proportion of bacteria carrying this mutation change in the population over time in populations treated with methicillin?
The number of mutated bacteria would increase because the mutated bacteria would outcompete the non-mutated bacteria for resources.
The number of mutated bacteria would decrease because the non-mutated bacteria would outcompete the mutated bacteria for resources.
The number of mutated bacteria would decrease because the non-mutated bacteria would be selected for over time through natural selection.
The number of mutated bacteria would increase because the mutated bacteria are more successful and are able to reproduce more bacteria with the same mutation.
Answers
lThe number of mutated bacteria would increase because the mutated bacteria are more successful and are able to reproduce more bacteria with the same mutation.
How to explain the informationThis is because methicillin selectively kills non-mutated bacteria, leaving behind the mutated bacteria to reproduce and pass on their resistance to future generations.
Over time, this would result in an increased proportion of bacteria carrying the mutation in the population, leading to a higher incidence of MRSA. This process is an example of natural selection, where the mutation that confers resistance to methicillin provides a selective advantage in an environment where the antibiotic is present.
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Which of the following scenarios would be considered an unconstitutional use of state power? Choose 1 answer: Choose 1 answer: (Choice A) A Imposing a sales tax on all clothing and cosmetics sold within a state (Choice B) B Establishing a minimum drinking age of 18 in their state (Choice C) C Requiring Amish students to attend school until age 16 despite their religious beliefs (Choice D) D Requiring a one-year waiting period before married couples can file for divorce
Answers
Answer:
D huhu
Explanation:
I think im not sure
Answer:
C: Requiring Amish students to attend school until age 16 despite their religious beliefs.
Explanation:
Doing this would be considered an unconstitutional use of power, as it does not follow the constitution
The Everglades is a unique ecosystem of aquatic birds, plants and animals. For this area to thrive, it must be protected. Which of the following would have the least effect on the water flow through the Everglades?
A.) Planting trees that require an abundance of water for growth
B.) Constructing a road from the east to the west coast of South Florida
C.) Building irrigation canals for farmers to obtain water for their crops
D.) Overfishing of native species
Answers
Answer: it’s D
Explanation:
Because that has the least effect
If your research gives you a statistic that 70% of Americans are health conscious, then compare that to the amount of money spent each year on fast
food in America, you will probably find a conflict in those numbers. This would be evidence that your study lacked_validity.
Answers
If a research study indicates that 70% of Americans are health conscious, but when compared to the amount of money spent on fast food in America, a conflict arises, it would suggest a lack of validity in the study.
Validity refers to the extent to which a study accurately measures or reflects the concept it claims to be studying.
In this case, the conflict arises because the high percentage of health-conscious individuals does not align with the substantial amount of money spent on fast food.
If the study had strong validity, we would expect to see a correlation between health consciousness and a corresponding decrease in fast food consumption or expenditure. However, the evidence suggests otherwise.
The lack of validity may be due to various reasons such as flawed data collection methods, biased sampling techniques, or inaccurate survey questions.
It is essential to critically evaluate the study's methodology and data to identify any potential sources of error or bias that could have contributed to the conflict between the reported health consciousness percentage and the expenditure on fast food.
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Jorge's production possibilities schedule demonstrates that
A. Green beans have a trade-off with corn, but corn does not have a trade-off with green beans
B. Green beans do not have a trade-off with corn, but corn has a trade-off with green beans
C. There is no trade-off between corn and green beans
D. Both corn and green beans require a trade-off
Answers
Answer: D. Both corn and green beans require a trade-off
Explanation:
Trade off simply means that for one to gain or have an increase with regards to a particular thing, thus will lead to the decrease or reduction in something else.
We should also note that the production possibility curve shows how two goods which are green beans and corn in this case can be efficiently used while making use of the resources that are made available for that particular economy.
In this case, we can see that as the pounds of green bean increase, the pound of corn reduces. This shows that both corn and green beans require a trade-off
When shooting a closeup shot, the subject should be approximately how far from the
background?
Answers
Answer: For example, a long shot refers to a shot that's taken at a distance from the subject with a long camera lens, while a low-angle shot refers to a shot taken from underneath the subject90-110mm – the standard macro focal length range; ideal for photographing flowers, insects and other small objects; . 150-200mm – a better option for mobile insects and other small animals because it provides more working distance . We also talked about the length of the camera lens above.
hope this helps have a nice day❤️
Explanation:
Technician A says that one function of a damage report is to help prevent misunderstandings between the repairer and customer.
Technician B says that one function of a damage report is to document authorization to repair the vehicle.
Who is right?
Answers
Answer: both a and b
Explanation:
1. It is a decayed matter from plants and animals mixed with soil for plants to grow fast and become
productive.
a. Green Manure
b. Humus
c. Manure
d. Topsoil
2.
is cultivating the soil towards the base of the plant or
cultivation around the plant. When cultivation is done properly, the growth of weeds can be controlled.
a. Cultivating b. Hilling-up c. Off-barring
d. Planting
3. A way of supplying water to the plant from sources like deep wells, dams and rivers with the use of
motors or machine.
a. Advance watering b. Artificial watering
c. Manual watering d. Natural watering
4. This irrigation includes the line, rotating and micro sprinklers in which artificial rain is distributed through
special devices that wet the entire field
a. Drip irrigation b. Sub-irrigation c. Sprinkler irrigation d. Surface & furrow irrigation
5. A practice to help promote the growth of roots and improve aeration for fast absorption of nutrients by
the soil.
a. Cultivating the land b. Irrigating the land c. Preparing the land d. Watering the land
6. It is the most popular marketing tool to help organizations quickly draw the attention of prospective
customers.
a. Books
b. Brochures
c. Flyers
d. Magazines
Answers
Answer:
D. Topsoil
C. Offbarring
B.Artificial watering
D.Surface & furrow irrigation
A cultivating the land
B. Brochures
5. As discussed in the reading and in class, match the VB-MAPP component with its description. (5 pts)
A. Milestones Assessment D. Task Analysis & Skills Tracking
B. Barriers Assessment E. Placement & IEP Goals
C. Transition Assessment
_____ More comprehensive breakdown of skills to teach
_____ Identifies barriers that will impede progress
_____ Identifies specific skills to target
_____ Summarizes and provides specific directions
_____ Identifies overall skills and existing learning capabilities
Answers
Answer:
A) Milestones Assessment Identifies specific skills to target
B) Barriers Assessment identified barriers that will impede progress
C) Transition Assessment identified overall skills and existing learning capabilities
D) Task Analysis and Skills Tracking Summarizes and provides specific directions
Explanation:
The VB-MAPP means Verbal Behaviour Milestones and Placement Program.
It is a tool that is criterion-referenced that is created and intended for children with speech delays, children who are autistic, and other classes of individuals who have exhibited speech delay. It also contains a curriculum guide and a skill or progress tracking system.
Cheers
A person weighs 833.0N on the surface of Planet X. Plant Y is 2 times the mass and 4 times the radius of Planet X. Calculate the weight of the person on Planet Y.
Answers
Answer: The person will weight approx. 625 N.
Explanation: in the attachment :3
Based on your reading of Bolívar, what guesses can you make about the reasons why the new nations of South America found it difficult to achieve stable republican governments?
Answers
An example of a non-current liability will be ... Select one:
a. mortgage loan.
b. a creditor.
c. a bank overdraft.
d. equipment purchased on credit.
Answers
An example of a non-current liability will be is: d. equipment purchased on credit.
What is An example of a non-current liability?An example of a non-current liability would be equipment purchased on credit. Non-current liabilities are obligations or debts that are not expected to be settled within the next year or operating cycle, whichever is longer.
Equipment purchased on credit typically involves obtaining equipment from a supplier or vendor with an agreement to pay for it over a longer period, often in installments.
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O tema do texto e
(A) O calor intenso que faz sobretudo nos esta
dos brasileiros da regido
(B) O risco à saúde pe
nutenção adequ
Um novo ar-con
desenvolvido para
0) A vasta fauna de fun
bita os dutos do ar-cond
Answers
Answer:
Explanation:
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Kindergarten is the first year of
O pre-school
day-care
elementary school
O middle school
O :
other
Answers
Answer:
Kindergarten is the first year in most elementary schools. Hope this helps!
give an example of a time you have had to deal with change, professionally or personally?
Answers
Personally: Moving and having to switch schools and make new friends
What is a periodical? What is the difference between the periodical title
and the article title?
Answers
Answer: The title of the article is in sentence-case, meaning only the first word and proper nouns in the title are capitalized. The periodical title is run in title case, and is followed by the volume number which, with the title, is also italicized.
Explanation:
Is it better to write in MLA or APA format? And why
Answers
Answer:
MLA is more commonly used than APA at the high school level. ... MLA (Modern Language Association) format is used for humanities and literature works. APA (American Psychological Association) is used for technical and scientific works. Each writing style is formatted to make citations for that specific field easier
Explanation:
The personal identification number that students need to apply for federal student aid is also called a: OA. PASSWORD. O B. PIN. O C. CODE. O D. 4caster. SUBMIT
Answers
The personal identification number that students need to apply for federal student aid is also called a PIN
What is the personal identification number?The PIN (Personal Identification Number) is a singular identifier namely used by juniors and their parents to authorize general student aid, in the way that grants, loans, and work-study programs. The PIN serves as a digital sign and helps to ensure the protection and accuracy of undergraduate facts during the request process.
The PIN is used to access miscellaneous federal undergraduate aid websites, such as the Free Application for Federal Student Aid (FAFSA) site, and is necessary to electronically sign the FAFSA.
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Smiling is to feeling as ________ is to ________.
Answers
Smiling it to feeling as Behavior is to Mental Process.
An advertising executive thinks that the proportion of consumers who have seen his company advertisement in newspaper is around 0.65. The executive want to estimate the customer proportion to within ± 0.05 and have a 98% confidence in the estimate. How large a sample should be taken?
Answers
An advertising executive thinks that the proportion of consumers who have seen his company advertisement in newspaper is around 0.65. The executive want to estimate the customer proportion to within ‡ 0.05 and have a 98% confidence in the estimate. How large a sample should be taken?
What does a record tell you about a source?
Answers
The writer wants to add an additional body paragraph to support the passage’s argument. Which of the following claims would make the best topic for such a paragraph
Answers
Answer:
E. Long-term missions would also create social and psychological issues, such as extreme isolation and loneliness, that may have a negative impact on space travelers.
Explanation:
Answer E
Correct. The writer supports the passage’s argument that long-term space travel is not likely to be viable or desirable in the near future by presenting reasoning and commentary in the body paragraphs pertaining to the negative effects space travel has on the physical well-being of humans—effects that are worsened the longer people spend in space. The best topic for an additional body paragraph among the choices provided is the one that addresses the negative consequences that long-term space travel would have on humans’ social and psychological well-being. This choice would provide additional support for the writer’s argument that there are too many serious concerns about long-term space travel for it to be viable in the near future.
Answer:
E. Long-term missions would also create social and psychological issues, such as extreme isolation and loneliness, that may have a negative impact on space travelers.
Explanation:
i just took the test
which of the following defines chicago's position in relation to the infrastructure of the united states
Answers
Answer: situation
Explanation: It’s in RELATION to something
The option that defines Chicago's position in relation to the infrastructure of the United States is situation.
What is seen as infrastructure in the United States?Infrastructure is known to be any of the basic amenities such as public and private physical structures that has been created e.g. roads, etc.
Conclusively, Note that The option that defines Chicago's position in relation to the infrastructure of the United States is situation as they believe that that infrastructure is a situation that needs to be handled by the country.
See full options below
Which of the following defines Chicago's position in relation to the infrastructure of the United States?
answer choices
Site
situation
absolute location
vernacular region
transition
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39
Select the correct answer from each drop-down menu.
Complete the following sentences.
To create cuts on the skin, a makeup artist can use
artists use
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Submit Test
Likewise, to show the effect of snow on skin, the makeup
Next
ES
Reader Tools
May 15
10:13
Answers
In order to make cuts on the skin, a makeup artist can use:
Special effects makeup toolsProstheticsLatex or silicone materialsLikewise, to show the effect of snow on skin, the makeup artist can use:
Fake snow or snow-like materialsWhite or iridescent makeup productsHighlighting techniques to create a frosty effectWho is a makeup artist?A make-up artist, also called a makeup artist. This name is usually abbreviated to MUA.
He or she, is an artist that spreads makeup and prosthetics to people for theatre, television, fashion, magazines, and other comparable corporations, including all parts of the modeling profession.
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She 'ill use make-up of course
provide one specific example of when you might incorporate a source in your writing for work or school. Then in 2-3 sentences explain the value of incorporating sources into your writing
Answers
Here is an example of how you might incorporate a source in your writing:
According to a study by the Pew Research Center, "the number of Americans who say they are willing to pay more for products that are made in the United States has increased in recent years." (Pew Research Center, 2017)
This quote from the Pew Research Center study provides evidence to support the claim that there is a growing demand for American-made products. By incorporating this source, you can show your readers that your claim is based on research and that it is not just your own opinion.
In addition to making your writing more credible, incorporating sources can also help you to learn more about your topic. When you read other sources, you are exposed to new ideas and perspectives. This can help you to develop a deeper understanding of your topic and to write a more comprehensive paper.
Overall, incorporating sources is an important part of writing for work or school. By incorporating sources, you can make your writing more credible, persuasive, and informative.
Incorporating sources into your writing adds value by enhancing the quality and reliability of your work.
One specific example of when you might incorporate a source in your writing for work or school is when you are writing a research paper on a specific topic. In this case, you would include sources such as academic journals, books, or reputable websites to support your arguments, provide evidence, and give credibility to your work.
Incorporating sources into your writing adds value by enhancing the quality and reliability of your work. It demonstrates that you have conducted thorough research, considered different perspectives, and built your arguments on a foundation of existing knowledge. By citing credible sources, you also acknowledge the contributions of others and give readers the opportunity to explore the topic further.
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who do we trust more the court or elected officials
Answers
Answer:
We trust the court more
Explanation:
Courts are the part of judiciary branch of governing constitution of any country. An individual can raise voice against injustice done to him/her by an elected official and further can reach out to the judiciaries body.
Judiciary system lies above the administrative system (comprising of ministers or elected officials) and hence one has more trust on court than the elected officials.
Mr. Martinez praises Nolan in front of the rest of the class for raising his hand and answering a discussion question correctly. The next day during class discussion, Mr. Martinez expects to see Nolan raise his hand and offer correct responses again. However, Nolan slumps in his seat, avoids eye contact, does not raise his hand to be called on, and when called on, offers no response. In regards to his class participation, praising Nolan served as
a.
negative reinforcement.
b.
positive reinforcement.
c.
presentation punishment.
d.
removal punishment.
Answers
Answer: c. presentation punishment.
Explanation:
Presentation punishment involves adding an unpleasant or unwanted stimuli to a subject that will decrease the chances of them participating in the relevant activity again.
Praising Nolan must have been a presentation punishment to him that he did not want so in order to avoid being praised again, Nolan decides to avoid answering questions as he believes this will lead to the praise.
Compare Traditional, Command, Market and Mixed Economies; What are each systems advantages and disadvantages
Answers
Advantages:
Preservation of cultural and societal traditions.
Strong sense of community and social cohesion.
Sustainable use of resources.
Disadvantages:
Limited economic growth and innovation.
Lack of individual freedom and limited opportunities for social mobility.
Vulnerability to external shocks and changes in the environment.