how can alcohol use among teens permanently affect the white matter of the brain and the prefrontal cortex?

Answers

Answer 1

Answer:

Explanation:

Alcohol use among teens can permanently affect the white matter of the brain and the prefrontal cortex in several ways.

First, alcohol consumption during adolescence can damage the white matter of the brain, which is the tissue that helps to connect different regions of the brain and facilitate communication between them. Alcohol consumption during this period of development can disrupt the normal development of white matter and impair the brain's ability to process information, make decisions, and regulate emotions.

Second, alcohol use can also damage the prefrontal cortex, which is the part of the brain responsible for higher cognitive functions such as planning, decision-making, and impulse control. Alcohol consumption during adolescence can disrupt the normal development of the prefrontal cortex and impair these cognitive functions, leading to problems with learning, memory, and behavior.

Overall, alcohol use among teens can have long-term consequences for brain development and function, and can increase the risk of problems such as addiction, mental health disorders, and cognitive impairment. It is important for adolescents to avoid alcohol use to protect their developing brains and optimize their cognitive and emotional development.


Related Questions

Describe 3 ways that mental health can be connected to substance use problems

Answers

Answer:

Either an alcohol or drug use problem or a mental health issue may come first. If you have a mental health issue, you may use alcohol or drugs to try to feel better. Or a substance use problem may lead to mental health symptoms such as depression, anxiety, or rage. For some individuals a substance use problem and mental health issue start at the same time, triggered by the same factor; for others they start separately.

Explanation:

They will start seperatly

Raj noticed his friend Dan posted an unflattering picture of him online that could damage his professional reputation. Is Raj right to be concerned about this being part of his digital footprint?
A.
No, digital footprints only include pictures Raj personally posts online for himself.
B.
Yes, digital footprints include not only what Raj posts but also what others post about him.
C.
No, digital footprints remain for only seconds after someone has posted something.
D.
Yes, digital footprints are temporary, but employers might still see them before they disappear.

Answers

'Yes, digital footprints include not only what Raj posts but also what others post about him'. Therefore, Raj right to be concerned about this being part of his digital footprint.

What do you mean by digital footprints?

A digital footprint is the information that a person leaves behind while using a digital device. It includes activity on social media sites, online searches, purchases, emails, file downloads, and more. Digital footprints can be monitored and tracked by individuals, companies, and governments.

A digital footprint is the online evidence of a person’s activities, interests, and opinions, which can be tracked by anyone with access to the internet. This includes not only what Raj posts but also what others post about him, such as comments, shares, or tags. As such, Raj is right to be concerned about this being part of his digital footprint, as it can be used to form an impression about him that might not be accurate. In addition, it can be difficult to control what others post about him, which can lead to potential issues down the line.

Hence, option B is correct.

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Answer:

option B . yes, digital footprints include not only what Raj posts but also what others post about him.

Explanation:

Which statements below accurately explain health information privacy? Check all of the boxes that apply.

Health information privacy is a form of keeping patient information secure.

Health information privacy may or may not apply, depending on the patient.

Health information privacy means not misusing patient information.

Answers

Answer:

the first one and the second one

Answer:

A and C

Explanation:

First one and the third one.

Hi, I'm having a long period. It's been 2 weeks now, the first 7 days are normal but after a week the bleeding is still continuing but its only light not heavy tho. Is it normal? First time happened to me, I'm worried ​

Answers

Answer:

its normal tho when i got period too that happend

just drink cold water and dont take a bath too long ok thats what my mothers said hoped it helped and also dont eat oily foods sweets are not allowed for girls who have period its normal that you have it for long ok dont be worried nothing will bad happend  

hope it hepled

Answer : i'm not really so good for giving advice - so use the comment above me for that but if this continues for a month+ ( maybe two ) then I recommend seeing a doctor.

Due today please help (20 points if correct)
Write a description of one real-life problem that has to be solved or decision that has to be made. Describe three obstacles related to solving the problem or making a decision. Then explain how you overcame those obstacles or will in the future.

Answers

The decision or conundrum I encountered when selecting a subject for a University can be characterized as a situation of real-life problems that must be resolved using good judgment and overcoming the obstacles.

The obstacles related to making the decision include:

Amount to be spent on. each course.

Future income expectations.

Love for the courses.

The decision was overcame by thinking about the issue properly.

What was the obstacle about?

I immediately put the topic of mass communication out of my mind when choosing the course I wanted to take. My personality is not supported by the course. Even though I enjoyed studying current events and the media, I believed that a career in the mass media would require arrogance and a pushy attitude. I was unable to see how this course would work for me. Although the counselor made a counterargument, my belief prevented me from considering it.

In the end, I chose to major in engineering, even though at first I thought it would be dull because of all the coding. In the beginning, I only took notice of one aspect of my studies. But as time went on, I warmed to my decision and now I don't regret it.

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A nurse is reviewing complications of pregnancy with a client who is 31-weeks pregnant. Identify three (3) complications to discuss with the client that should be reported.

Answers

It is important for the client to be aware of and report any signs of preterm labor, gestational hypertension/pre-eclampsia, and decreased fetal movement.

Prompt reporting of these complications allows for timely evaluation and appropriate interventions to ensure the well-being of both the mother and the baby.

As a nurse reviewing complications of pregnancy with a client who is 31-weeks pregnant, there are three important complications that should be discussed and reported.

1. Preterm Labor: Preterm labor refers to the onset of regular contractions and cervical changes before the 37th week of pregnancy. It can lead to premature birth, which poses risks for the baby's health and development. Signs of preterm labor include regular contractions, pelvic pressure, backache, abdominal cramps, and vaginal bleeding.

2. Gestational Hypertension/Pre-eclampsia: Gestational hypertension is characterized by high blood pressure that develops after 20 weeks of pregnancy. If left untreated, it can progress to pre-eclampsia, a more severe condition marked by high blood pressure and organ damage.

3. Decreased Fetal Movement: A decrease in fetal movement can indicate potential problems with the baby's health. While it's normal for fetal movement patterns to change as the pregnancy progresses, a significant decrease or absence of movement should be reported.

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These figures are similar. The perimeter and
area of one are given. The perimeter of the
other is also given. Find its area and round
to the nearest tenth.
Perimeter = 20 cm
Area = 18.6 cm?
Perimeter = 28 cm
Area = [? ]cm​

Answers

Answer:

36.5 cm²

Explanation:

The perimeter of the smaller shape = 20 cm and The area of the smaller shape = 18.6 cm²

The perimeter of the bigger shape = 28 cm

The length and breadth of the smaller shape is increased by a factor of k to produce the larger shape.

If the length of the smaller shape = l and its width = w. The perimeter of the smaller shape = 2(l + w) = 20

Since The length and breadth of the smaller shape is increased by a factor of k to produce the larger shape, the length of the larger shape = kl and its width = kw. Therefore  the perimeter of the larger shape = 2(kl + kw) = 2k (l + w) = 28 cm

To find k, divide the perimeter of the larger shape by the perimeter of the larger shape:

\(\frac{2k(l+w)}{2(l+w)} =\frac{28}{20} \\k=1.4\)

The area of the smaller shape = l * w = 18.6 cm²

The area of the larger shape = kl * kw = k² * l * w = 1.4² * 18.6 cm² = 36.5 cm²

What is the difference in sui cide rates between individuals suffering from a mood disorder and individuals who are not?

Answers

Answer:

its higher in people who are depressed and bipolar that people who are not

Explanation:

What was one of the main programs created with the passing of the 1935 massive federal aid
legislation?

Answers

Answer:

The act established the Federal Emergency Relief Administration, a grant-making agency authorized to distribute federal aid to the states for relief. By the end of December 1935, FERA had distributed over $3.1 billion and employed more than 20 million people

Explanation:

I hope it was correct answer.

Freddie chose to become a teacher, because he cares about educating young adults and improving their lives. Of the reasons people work, the best match for why Freddie works is to _____. A. Pay for wants and needs b. Be around others c. Make a contribution d. Be self-fulfilled.

Answers

Freddie chooses to become a teacher to work and make a contribution. Thus, option C is correct.

Education is the civil right of the citizens and helps an individual to grow and become self-dependent. The contributors to education take education seriously and improve their lives.

Why did Freddie become a teacher?

The feeling Freddie is about his concern for young adults' education. He is aware of education as the tool to improve the lives of individuals.

Thus, in order to improve lives and make a contribution, Freddie chooses to become a teacher. Thus, option C is correct.

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Answer:

C

Explanation:

edge 2022

For small liquid spills that only affect a small area of skin, immediate flush with flowing water for at least.

Answers

For small liquid spills that only affect a small area of skin, it should be flushed with flowing water for at least 15 minutes.

If a little amount of liquid spills or splashes onto a small area of skin, you should immediately flush the skin with running water for a minimum of 15 minutes (30 minutes for bases).

To help with the elimination of any potential liquid residue between your skin and the jewelry and the jewelry, you should take off any jewelry. You're not supposed to wear any jewelry in the lab for this reason, among others.

After giving the afflicted region of skin a first water rinse, wash it thoroughly with warm water and soap. As soon as you can, either you or another student should inform your teacher.

Check the Safety Data Sheet (SDS) to discover whether any delayed effects are anticipated after washing your skin.

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What would a person need to do in terms of caloric input and output to lose weight.

Answers

Answer:

A person who aims to lose weight should take in less amount of calories. Take note that most food indicates this amount in the packaging. Similarly, he also needs to loss the calories he has taken in. For those who wanted to gain weight, increase the caloric input.

Source:

Describe what a person would need to do in terms of caloric input and output to: lose weight: gain weight - Brainly.com

Select all that apply. An echocardiogram technician

uses sound waves to image the heart.
is a medical doctor.
performs surgery.
uses specialized equipment.
deals with catherization problems.

Answers

Answer:

1,3,4

Explanation:

Answer: Its 1 and 4

Explanation:

Please explain Cardio Endurance.

Answers

Answer:

Explanation: level at which your heart lungs and muscles work together when you’re exercising for an extended period of time

leukemias - cancers arising through mutations that cause excessive production of white blood cells - have an earlier average age of onset than other cancers. propose an explanation for why this might be the case.

Answers

One possible explanation for leukemias having an earlier average age of onset compared to other cancers is related to the nature of the disease and its underlying genetic mutations.

Leukemias often arise from mutations in hematopoietic stem cells, which are responsible for the production of blood cells. These mutations can occur early in life or even be present at birth, making individuals susceptible to developing leukemia at a younger age.

In contrast, other cancers may require a longer accumulation of genetic mutations or exposure to certain environmental factors over time before they manifest clinically. Thus, the early onset of leukemias could be attributed to the early occurrence of genetic mutations in the blood cell lineage.

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as a teenager what can i do to prevent the spread of disease​

Answers

Answer:

Wash your hands.

Explanation:

Answer:

Wear a mask to protect yourself and others and stop the spread c.ovid.

Stay at least 6 feet (about 2 arm lengths) from others who don’t live with you.

Avoid crowds and poorly ventilated spaces. The more people you are in contact with, the more likely you are to be exposed to c.ovid. (This doesn't mean avoid everyone lol)

Get a c.ovid vaccine when it’s available to you.

Clean your hands often, either with soap and water for 20 seconds or a hand sanitizer that contains at least 60% alcohol.

Avoid close contact with people who are sick.

Cover your cough or sneeze with a tissue, then throw the tissue in the trash.

Clean frequently touched objects and surfaces daily. If someone is sick or has tested positive for c.ovid, disinfect frequently touched surfaces.

Monitor your health daily.

Explanation:

hope this helps love!

What should you do if a penetrating eye injury occurs?.

Answers

Answer:

The most important thing you can do is leave the penetrating object in the eye. To avoid further damaging the eye, such objects should only be removed by a professional who knows what they are doing. Patients with a penetrating eye trauma should see a medical professional immediately and check in with their eye doctor.

during a workshop for mothers, one of the topics of discussion was the increasing use of cell phones and other gadgets by children. during the session, the speaker requested parents to monitor their children's screen time and stressed the importance of exercise in a child's physical development. she requested parents to exercise more often so that their children would be encouraged to spend less time with their gadgets and more time involved in physical activities. which of the following statements explains why the speaker put forth this request?

Answers

The speaker put forth this request during the workshop for mothers because excessive screen time can negatively impact a child's physical development, mental well-being, and social skills.

The speaker put forth this request because there has been a significant increase in the use of cell phones and other gadgets among children. This increased screen time has been linked to a number of negative effects on children's physical and mental health. The speaker emphasized the importance of exercise in a child's physical development and the need for parents to monitor their children's screen time in order to encourage them to engage in more physical activities. By exercising more often themselves, parents can set a good example for their children and encourage them to spend less time with their gadgets and more time involved in physical activities. The speaker's request is aimed at promoting a healthier lifestyle for children and reducing the negative impact of excessive screen time on their health and wellbeing. By encouraging parents to monitor their children's screen time and promote exercise, the speaker aimed to help children develop healthy habits and reduce the risks associated with excessive gadget use. Additionally, when parents themselves engage in regular physical activities, they serve as positive role models for their children, making it more likely for the children to adopt active lifestyles and prioritize exercise over screen time. This approach helps foster a balance between technology use and physical activities, supporting the overall development and well-being of children.

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1. Which of the following is a 'function of families? A. providing for physical needs B. fulfilling emotional needs C. educating children D. All of the above.​

Answers

D. all of the above.

All of the above are the function of families.

What is family?

Family (from Latin: familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. families offer predictability, structure, and safety as members mature and learn to participate in the community.

Anthropologists classify most family organizations as matrifocal (a mother and her children), patrifocal (a father and his children), conjugal (a wife, her husband, and children, also called the nuclear family).

The field of genealogy aims to trace family lineages through history. The family is also an important economic unit studied in family economics. The word "families" can be used metaphorically to create more inclusive categories such as community, nationhood, and global village.

Therefore, All of the above are the function of families.

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.

GIVE BRAINLIST !!!!! ONLY 2 QUESTIONS!!
1.How can “perceived norms” affect a person's choices about drug use?
2. What roles does “individual responsibility” play in a person’s choice about drug use and why is it important

Answers

Answer:

1: it can cause people to think that taking bad drugs is cool and is good.

2: it causes a person to not take drugs because they think that it is bad and irresponsible to do so

Pls mark brainlist

Which of the following provides vitamins, minerals, carbohydrates, and fiber?
meat
vegetables
dairy products
eggs

JUST ANSWER ONE OF THEM! (the correct one)

Answers

Answer:

vegetables provides vitamins, minerals, carbohydrates and fiber.

In order to maintain a positive energy balance, the body must ________.a. limit caloric intakeb. expend more energy than it consumesc. consume more energy than it expendsd. reduce the amount of heat produced by the bodye. increase activity

Answers

In order to maintain a positive energy balance, the body must c) consume more energy than it expends.

Energy balance refers to the relationship between energy intake (calories consumed through food and beverages) and energy expenditure (calories burned through physical activity, resting metabolism, and other bodily processes).

When energy intake exceeds energy expenditure, a positive energy balance occurs, leading to weight gain and potential accumulation of body fat.

To achieve a positive energy balance, individuals need to consume more calories than they burn. This can be accomplished by increasing caloric intake through food and beverages or by reducing the amount of energy expended through physical activity or metabolic processes.

Increasing activity, as mentioned in option e, can also contribute to maintaining a positive energy balance. When individuals engage in physical activity, they burn calories, which increases their energy expenditure.

By increasing activity levels, more calories are expended, creating a greater energy deficit and promoting weight loss.

It's important to note that while maintaining a positive energy balance may be desired for certain individuals with specific goals, such as those trying to gain weight or build muscle, it can be detrimental to overall health if sustained over a long period of time without appropriate balance and consideration of nutritional needs.

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A pot tips over on your mother's arm while she is cooking. She yells for help and tells you that the burn hurts a lot. You see a small
red burn on her arm. After you have ensured the scene is safe and put on your own protective gear, and gotten the first aid kit. What
should you do next?

Answers

After ensuring safety, putting on protective gear, and getting the first aid kit, cool the burn with cool water for 10-20 minutes.

After ensuring the scene is safe and donning your own protective gear, the next step in providing first aid for a burn on your mother's arm is to follow these steps:

Cool the burn: Run cool (not cold) water over the burn for about 10 to 20 minutes. This helps to reduce the heat and minimize tissue damage. If running water is not available, you can use a clean, cool compress.

Remove jewelry or tight clothing: If there is any jewelry or tight clothing near the burn, gently remove it before swelling occurs. This prevents further complications in case of swelling.

Cover the burn: Once the burn has been cooled, cover it with a sterile non-stick dressing or a clean cloth. This helps to protect the burn from infection and further damage.

Evaluate the severity: Assess the severity of the burn. If it is a minor burn, it can usually be treated at home. However, if the burn is deep, covers a large area, or is causing severe pain, it may require medical attention. In such cases, it is important to seek professional medical help.

Provide pain relief: If your mother is experiencing significant pain, you can offer over-the-counter pain relief medications like acetaminophen or ibuprofen. However, it is important to follow the instructions and consult a healthcare professional if needed.

Monitor for complications: Keep an eye on the burn for any signs of infection, such as increasing pain, redness, swelling, pus, or fever. If any of these symptoms occur, seek medical assistance promptly.

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cook chicken to an internal product temperature of _____ for at least 15 seconds to kill any bacteria.

Answers

Cook chicken to an internal product temperature of 165°F (74°C) for at least 15 seconds to kill any bacteria.

The internal temperature of chicken should be 165°F (74°C). This temperature is critical because it efficiently eliminates any hazardous bacteria present, such as Salmonella and Campylobacter, which can cause foodborne diseases.

The most accurate approach to detect the internal temperature of chicken is to use a food thermometer. It should be put into the thickest section of the flesh, often the breast or thigh, and set to 165°F (74°C) for at least 15 seconds.

Thus, this guarantees that any potentially harmful germs in the chicken are totally eliminated, lowering the risk of foodborne disease and encouraging safe eating.

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How does anaerobic metabolism play a role in poor oral health?

Answers

Answer:increase sugar in the diet increase bacteria in mouth leading to increased plaque. The bacteria under the plaque uses anerobic metabolism because oxygen can’t get through the plaque. This causes a by product of organic acid, lactate and pyruvate. These eat away at tooth enamel causing decay.

Explanation:anerobic metabolism does not require oxygen


Anaerobic metabolism plays an important role in poor oral health by allowing bacteria to accumulate and form plaque. Plaque is a sticky film of bacteria that builds up on the surface of teeth and gums and leads to tooth decay and gum disease.

Without oxygen, anaerobic bacteria can thrive and produce acids which cause cavities and lead to gum infections. The acids also deplete the calcium and other minerals that are essential for maintaining strong, healthy teeth.

In addition, anaerobic bacteria produce volatile sulfur compounds, which are odorous and unpleasant and can lead to bad breath.

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help asap
what is the best way to whiten teeth

Answers

Answer:

baking powder or whatever it's called (that thing u normally put in cake when u bake one)

Answer: brush your teeth that's the best way

things you should not do: don't put lemons on your teeth if you think it whitens it does not it's bad for your teeth. The second is Carbon Coco don't use that black powder is known by a lot of people but a lot of the people who use Carbon Coco don't know that it is really bad for your teeth what it does is takes the top layer which is yellow and works like sandpaper removing the yellow/dirty part of your teeth the bad part about this it will make your teeth extremely sensitive.

hope this helps

The way you interpret information can affect your self-esteem and your attitudes true or false

Answers

Answer:

True! This is because you can either think of the worst that could happen or the best that could happen. Hope this helps!!

Because his football coach frequently yells at him for swearing, Antonio now becomes anxious when he's near his coach. The coach is a(n)
for Antonio's
anxiety.
(A) unconditioned stimulus
(B unconditioned response
(c)conditioned stimulus
D) conditioned response

Answers

Answer:

i beleive it is [C]

Explanation:

when something is conditioned, it means that when something happened (or in this case his football coach is nearby) it triggers an emotional response, for fear, or surprise.

true or false: You should not remove an object embedded in a puncture wound because it may be preventing bleeding.

Answers

Answer:

True. The impaled object should NOT be removed, and you should seek medical attention as soon as possible.

Explanation:

Answer:

Yes, that is true.

Explanation:

If something is in your skin, it punctured a specific spot, It is keeping it covered, like tape on a pipe that is leaking, locate the hole, and tape it up. The strength keeps it from leaking. Say, a knife enters your skin, it won't bleed much, but when you pull it out, it unclogs the toilet, quote on quote.

true or false: You should not remove an object embedded in a puncture wound because it may be preventing

Part A: Ask Questions
Begin by creating a list of questions to guide your research and help you form a convincing argument. Your presentation should answer some of these questions:

What is the definition of a pandemic?
How does a pandemic differ from an endemic or epidemic?
What is the life cycle of the HIV virus once it enters the body? How does the genetic code of the virus change?
How does HIV affect the body?
How do people become infected with HIV?
How does AIDS develop from an HIV infection?
What are the current infection rates of HIV across the globe?
Where is HIV/AIDS most prevalent?
What treatments are currently available for HIV/AIDS?
Do some regions of the world have better access to treatments than others?
What is the average life expectancy for someone with HIV? Does life expectancy differ around the globe?
Now write four additional questions about HIV/AIDS that could help strengthen your argument in the presentation.

Answers

how many estimated people, ages 16-40 die from AIDS every year?  in 2018, 2019, and 2020, how many people were diagnosed with AIDS? what are the long term affects AIDS can have on someone? what are the yearly death rates caused by AIDS from this decade?

Answer:

how many estimated people, ages 16-40 die from AIDS every year?  

in 2018, 2019, and 2020, how many people were diagnosed with AIDS?

what are the long term affects AIDS can have on someone?

what are the yearly death rates caused by AIDS from this decade?

Explanation:

Other Questions
how is a pointer different from a reference variable? and please give a code example. if a patient is unresponsive the first thing a responder should do is an air purifier manufacturer is looking for ideas on using edge computing to enhance its products and services. which approach would make use of edge computing technologies? a scheduling feature that activates a customer's air purifier at a defined time each day a device in the customer's home that detects air quality levels and sends alerts when needed a local support staff based in the customer's geographic location for more rapid responses an automated program that can interpret customer service requests and assign agents accordingly memory is when behavior is affected by prior experience without a conscious recollection of the experience. T/F Do you know the answer toPart A: 25% of 50 = Part B: 25% of 60 = Part C: 50% of 60 = Part D: 75% of 60 = Part E: 75% of 30 = Part F: 100% of 22.5 = Part G: 10% of 22.5 = Part H: 50% of 45.7 = Convert to decimal degrees. Round to the nearest hundredth. Use the r button. 19pi over 10=___ Type SSS, SAS, ASA, SAA, or HL tojustify why the two larger triangles arecongruent.8 cm8 cm -Which expression is equivalent to (8x - 7) - (4x - 1)?A 12x - 8 B 12x - 6 4x - 8D 4x - 6- PLEASE SHOW HOW YOU GOT YOUR ANSWER describe an example of a social root of prejudice, an emotional root of prejudice, and a cognitive root of prejudice. HELP THIS IS OVERDO!!!!!Select the correct answer from the drop-down menu. A whole number is 6 more than 2 times another number. The sum of the two numbers is less than 50. This can be written in an inequality as x + 2x + 6 < 50, where x represents the smaller number. From the set {13, 14, 15, 16, 17}, the values of x for which the inequality holds true are ____. Assume that the United States economy is currently operating at an equilibrium below full employment. (a) Draw a correctly labeled graph of aggregate demand and aggregate supply, and show each of the following. (i) Long-run aggregate supply (ii) Current equilibrium output and price level (b) Now assume a significant increase in the world price of oil, a major production input for the United States. Show on your graph in part (a) how the increase in the oil price affects each of the following in the short run. (i) Short-run aggregate supply (ii) Real output and price level (c) Given your answer in part (b), explain what will happen to unemployment in the United States in the shoot run. (d) Assume that the United States trades with Japan. Draw a correctly labeled graph of the foreign exchange market for the United States dollar. Based on your indicated change in real output in part (b), show and explain how the supply of the United States dollar will be affected in the foreign exchange market. (e) Given your answer in part (d), indicate what will happen to the value of the United States dollar relative to the Japanese yen. factor polynomial 4x^2+4x+1 fill in the blank. * ____ factorial designs are those in which one of the factors is a between-subjects manipulation and the other is a within-subjects manipulation.Mixed In Lincoln's viewpoint, what impact did slavery have on the united states as it relates to the civil war? What is the climax action in Animal Farm?. HELP PLEASE, THANKS IF YOU DO!!! PLEASE HELP!! (Urgent) Describe any four ways by which the spirit of hardwork can be developed. Please help, will give brainliest for correct answers. Let X1, X2, and X3 be independent normal variables withE(X1) = -4 and 2 = 11E (X2) = 0 and 2 = 42E(X3) = 3 and 2 = 13(a) Show that 2X1 - X2 + 5X3 has a normal distribution.(b) Find the mean and variance of the random variable in part (a) A string with a linear density of 2 kg/m and a tension of 100 N is fixed at both ends. Determine the frequency of the first harmonic of the string.