"Why was the commercial introduction of relational database delayed during the 1970s? What factors encouraged its introduction in the early 1980s?"

Answers

Answer 1

Answer: the commercial introduction of relational database delayed during the 1970s due to:

1. It was not easily applicable in real-world environments due to performance related issues.

2. Earlier network and heirachical database management systems were emerging into the commercial markets where they were heavily advertised by software and hardware vendors.

Factors that encouraged its introduction in the early 1980s include:

1. Performance issues that rendered it not easily applicable in the real world began to be resolved.

2. Information systems users sought alternatives that would help simplify database design process thus producing database structures that were easier to use and understand at various levels.

3. There was increasing interest in having a data base management system environment that allows more easier, intuitive access to the data by very large number of personnel.

4. The personal computer coming into existence had software developers creating all manner of applications and supporting software utilities for the personal computer. Existing hierarchical and network database approaches would not work in the PC environment, because they were too large to store, too complex to be used by non-information systems users to whom the PCs were targeted.

Explanation: In the 1970s, the relational approach to database was just a technical curiosity until the start of the 1980s when commercially viable relational database management systems became available. This lag in adoption was as a result of two reasons:

1. It was not easily applicable in real-world environments due to performance related issues.

2. Earlier network and heirachical database management systems were emerging into the commercial markets where they were heavily advertised by software and hardware vendors.

Factors that encouraged its introduction in the early 1980s were:

1. Performance issues that rendered it not easily applicable in the real world began to be resolved.

2. Information systems users sought alternatives that would help simplify database design process thus producing database structures that were easier to use and understand at various levels.

3. There was increasing interest in having a data base management system environment that allows more easier, intuitive access to the data by very large number of personnel.

4. The personal computer coming into existence had software developers creating all manner of applications and supporting software utilities for the personal computer. Existing hierarchical and network database approaches would not work in the PC environment, because they were too large to store, too complex to be used by non-information systems users to whom the PCs were targeted.

Nowadays, the relational approach to database management is the primary database management approach used in all levels of information systems and foremost application purposes.


Related Questions

When making a job or career choice, each of the following would be considered a want EXCEPT:

A.
on-site child care
B.
gym membership
C.
desirable location
D.
retirement benefits

Answers

Final answer:

In the context of job or career choices, most benefits such as gym membership, desirable location, and on-site childcare are categorized as wants. However, retirement benefits, despite being desirable, tend to be viewed more as a need due to their role in securing future financial stability.

Explanation:

When making a job or career choice, people often consider both needs and wants. In this context, needs generally refer to necessities for performing the job effectively while wants pertain to additional benefits or perks that are desirable but not strictly necessary.

From the given options: on-site child care, gym membership, desirable location, and retirement benefits, all are generally categorized as wants as they enhance the job experience but are not mandatory for the successful performance of the job.

However, retirement benefits could be perceived to be more of a need than a want, especially when considering long-term career planning. These benefits are crucial for future financial security, hence can be viewed as a necessity rather than merely a want.

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Discuss the ways in which public perceptions of the Vietnam War changed between 1964 (the time of the Gulf of Tonkin Resolution) and 1969 (the year in which Nixon was inaugurated). Then discuss the ways in which Nixon's policies may have affected public perceptions of the war.

Answers

Answer:

Between 1964 and 1969 there was a great disparity between what the American press and the government said, with the data presented by both generally contrasting. In the United States and the West, starting in the late 1960s, a strong sense of opposition to war began as part of a major counterculture movement due to the large number of deaths. The war changed the dynamics of relations between the East and West blocks, also changing the north-south divisions of the world. During the 1968 presidential election in the United States, President Richard Nixon had run a campaign based on the motto 'peace with honor' in Vietnam which preached that the South Vietnamese should fight the war alone, he also tried to limit the conflict size. Nixon, in pursuit of an honorable retreat, intended to employ a variety of tactics for this, including increasing the geographical scope of the war. In the meantime, the antiwar movement was growing in the United States with constant demonstrations. Nixon appealed to the silent majority of Americans in support of the war. However, the revelations of the massacre of civilians, women and children mainly, provoked a national and international revolt, increasing pressure for peace. In 1971, secret Department of Defense documents were leaked to The New York Times. Called the Pentagon Papers, the top secret story of the United States' involvement in Vietnam, promoted by the Department of Defense, was made public showing the deliberate fabrication of reasons that led the United States into war, and caused a long series of disappointments. between public opinion.

Explanation:

What inference can be drawn from The Three Varieties of Music regarding the medieval attitude toward Boethius more than six centuries after he lived?

Answers

Answer:

One inference which can be drawn from the three varities of music is that Boethius’s distinction among types of music was perceived as valid.

Explanation:

Boethius was a Roman senator and philosopher who is known for his various contributions including ''De Musica'' in which he classified music into three main types.

In a few sentences, describe a way that a past historical event could inform your understanding of the recent event. Briefly describe a strategy for how you could be conscious of presentism (the use of modern values to interpret past events) in the study of those past events.

Answers

In studying history we come across what men were and did, and it helps us understand what we can be and do. Thus, history is the science of the past and the present, but the study of the past and the understanding of the present do not happen in a perfect way, as we do not have the power to return to the past and it does not repeat itself. For this reason, the past has to be “recreated”, taking into account the changes that have occurred over time. Information collected in the past will not serve the present if it is not recreated, questioned, understood and interpreted.

Historical accounts can help us to have a clearer understanding of the events that happen presently. The Holocaust is a past historical event where about 6 million Jews were killed during the Second World War.

World leaders watched on as this happened because they did not want to get entangled in the affairs of Germans. Today, some nations battle among themselves with little or no interventions from bigger nations. A strategy to  help us become conscious of presentism is "Avoiding assumptions." If a person avoids assumptions, then bias will be absent in our understanding of events.

Presentism is the act of judging the past by present values. It can infuse bias into our thoughts of matters.

To avoid presentism, avoid assumptions and reading meanings into the reasons why things happen the way they do.

So, the above is an example of a historical event that can help us to understand the present. Also, a strategy to avoid presentism has been stated.

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What is the name given to the phenomenon that, either on a national or individual level, as income increases so does life expectancy?

Answers

Life expectancy, also called life expectancy, is the average number of years that a country's population can expect to live, if the same living conditions experienced at birth are maintained. Life expectancy is closely related to the quality of life that a country has, since factors such as education, health, social assistance, basic sanitation, safety at work, violence rates, absence or presence of wars and internal conflicts influence on directly.

how did the slave trade turn into an arms race between tribes, where the best defense was a good offense?

Answers

The Atlantic slave trade made slaves less than others under society. It instituted the ideal that slaves were not of the same genealogy as everyone else.

Why did the Spanish explore the Americas?

Answers

Answer:

to conquer land.

Explanation:

Answer:

After the voyages of Christopher Columbus, when the notion that a new continent had been "discovered"  - from an european point of view  - in reality and not merely a region of the Western Indies, the Spanish crown continued the exploration to look for gold and other wealth and for conquering lands. Because of its involvement in the endless dynastic wars of Europe and the quest for power itself, Spain needed to find new sources of riches.

Explanation:

In what order did the Roman civilization emerge?
Select one:
a. empire, republic, city-state
b. city-state, empire, republic
c. city-state, republic, empire
d. empire, republic

Answers

Answer:

i think b

Explanation:

The answer is B. City-state, empire , republic

Using your knowledge of the modern United States, write a paragraph explaining how society's interpretation of natural rights has changed over time. What differences do you notice between 1787 and today? What groups have different rights? What do these changes suggest about the Enlightenment concept of natural rights? Your response should be at least five sentences long.

Answers

The Illuminists were concerned to denounce injustice, religious domination, the absolutist state and privileges as vices of a society that, increasingly, removed men from their “natural right” to happiness. According to the view of these thinkers, societies that are not organized around the improvement of the conditions of their individuals conceive a reality incapable of justifying, by logical arguments, their own existence.

For this reason, Enlightenment thinking chooses “reason” as the great instrument of reflection capable of improving and undertaking more just and functional institutions. However, if man does not have his freedom guaranteed, reason ends up being hampered by obstacles such as that of religious belief or by the imposition of governments that oppress the individual. The rationalization of habits was one of the great ideas defended by the Enlightenment.

Religious institutions were systematically attacked by these thinkers. The Church's meddling in economic and political affairs was a type of habit harmful to the development and progress of society. Even religious dogmatic thinking was placed as a barrier between God and man. Enlightenment thought believed that the divine nature was present in the individual himself, and therefore reason and experiment were a sure means of understanding the divine essence.

In a democracy, those who are responsible for the day to day conduct of government are accountable to the people for what is done in their name.which form of government, presidential or parliamentary,do you think comes closer to this ideal?why?

Answers

The answer is Both Parliamentary And Democracy, cause all representative are selected by the people

According to Barry Goldwater, what two forces are in constant conflict?

Answers

Final answer:

Barry Goldwater believed the two conflicting forces were the overreach of the federal government and conservative principles favoring limited government. He opposed the 1964 Civil Rights Act based on his conservative values, emphasizing states' rights and individual liberties.

Explanation:

According to Barry Goldwater, the two forces in constant conflict were the perceived overreach of the federal government and the tenets of conservatism that advocated for limited government intervention. As a leading conservative and Republican nominee for president in 1964, Goldwater emphasized his belief that the federal government was becoming too large and too intrusive, which went against the conservative values of smaller government and greater individual liberties. His opposition to the 1964 Civil Rights Act was based on these principles, and he feared that forceful federal intervention in matters of state governance would not only infringe on states' rights but could also exacerbate racial tensions rather than ameliorate them.

Why do you think the Boston Tea Party (and others) stands out in American memory? What about the incident brings a feeling of pride to Americans? If not pride what other emotions might come out? This is one of the most remembered events in our early history, what about it makes it easy to remember or stand a part from say the French and Indian War? Do you think it had as major an impact as we (present day Americans) think it did?

the answer has to be descriptive and no less than 200 words thanks!

Answers

Well, the Boston Tea party and other events happened before the American Revolution. Us Americans hated the British and wanted to have independence(Britain controlled us), so we fought for our freedom. This includes the War of 1812. After that, we wanted to expand, so Manifest Destiny kicks in. Manifest Destiny is our belief to spread from sea to shining sea.

Spencer and Social Darwinists represent the _________ approach to social change. Select one: a. evolutionary b. cyclical c. functionalist d. conflict theory

Answers

Answer:

a.

Spencer and Social Darwinists represent the evolutionary  approach to social change.

Explanation:

As in nature, the stronger countries and nations prevail and dominate the weaker, which are inferior and not so smart and able as the strong ones, Social Darwinists argue.

Kathy Brooks is a franchisee who wishes to donate her old HRB workstations and server to a local charity for a fundraising auction. What should Kathy do to make sure she is in compliance with H&R Block Information Security Compliance?


A.) Kathy can donate the equipment as she wishes since she paid for them.

B.) Kathy should contact Incident Management to get further information about the Hardware Disposal policy before proceeding.

C.) Procedures for removing and eliminating Confidential Information from hardware are available by contacting the Technical Service Center at 800-767-3346

D.) Both B and C are correct

E.) None of the above Mark for follow up

Answers

The correct answer is D) Both B and C are correct.

What Kathy should do to make sure she is in compliance with H&R Block Information Security Compliance is Kathy should contact Incident Management to get further information about the Hardware Disposal policy before proceeding and she has to know that procedures for removing and eliminating Confidential Information from hardware are available by contacting the Technical Service Center at 800-767-3346.

Kathy knows that she has to be careful in complying with what the company demands. Companies have strict rules to maintain ethical standards in the business. So that is why she needs to double-check that she is about to decide is in accordance with the company's policies.

Final answer:

As an H&R Block franchisee, Kathy Brooks must follow the company's Information Security Compliance when donating equipment, which requires contacting Incident Management and the Technical Service Center.

Explanation:

As a franchisee of H&R Block, Kathy Brooks is expected to follow company policies in all matters including when donating company equipment. The correct answer to her situation is option D: Both B and C are correct. Before Kathy can proceed with the donation, she should contact Incident Management for further information about Hardware Disposal policy (option B) to ensure the proper disposal processes are followed, especially concerning confidential information. Additionally, she should reach out to the Technical Service Center (option C) to learn the procedures for properly removing and eliminating Confidential Information from the hardware to avoid any breaches of data security.

3. According to Michael Wood, what route did Cabeza de Vaca follow

when he escaped?

A. Through New Mexico and Arizona and then into Mexico.

B. South across the Rio Grande and then west across Mexico.

C. North to the Brazos and then south to Baja.

D. Due West along the Rio Grande.

Answers

Answer:

The correct answer is letter A. Through New Mexico and Arizona and then into Mexico.

Explanation:

The Spanish Cabeza de Vaca was the leader of the Narváez expedition of 600 men who, between 1527 and 1535, explored the continent of North America. From Tampa Bay, Florida, on April 15, 1528, they marched through Florida. Traveling mainly on foot, they crossed Texas, New Mexico and Arizona, and the Mexican states of Tamaulipas, Nuevo León and Coahuila. After several months of fighting native inhabitants through desert and swamp, the party reached Apalachee Bay with 242 men. They believed they were close to other Spaniards in Mexico, but there was, in fact, 1500 miles of coastline between them. They followed the west coast, until they reached the mouth of the Mississippi River near Galveston Island.

Later, they were enslaved for a number of years by various Native American tribes from the upper Gulf Coast. They continued through Coahuila and Nueva Vizcaya; then, along the coast of the Gulf of California to what is now Sinaloa, Mexico, for a period of approximately eight years. They spent years enslaved by the Louisiana Gulf Islands' Ananarivo. Later, they were enslaved by Hans, Capoques and others. In 1534 they escaped to the American interior, coming in contact with other Native American tribes along the way.

Traveling mainly with this small group, Cabeza de Vaca explored what is now the North American state of Texas, as well as the northeastern Mexican states of Tamaulipas, Nuevo León and Coahuila, and possibly smaller portions of New Mexico and Arizona. He traveled on foot through the then colonized territories of Texas and the coast.

Ezekiel portrayed the siege of Jerusalem through a series of four __________ in order to show the exiles that the fall of Jerusalem was near,

Answers

Answer:

Ezekiel portrayed the siege of Jerusalem through a series of four sign acts in order to show the exiles that the fall of Jerusalem was near,

Explanation:

Explain the unique circumstances under which the ancestors of most Black/African American people arrived in the Americas. Why is it important for health service professionals to understand this history?

Answers

Most of the ancestors of Black/African American people arrived in the Americas as slaves. This means that their experience was forced unto them, that their autonomy was not respected and that their experience was traumatic. This knowledge can be passed down from generation to generation, impacting current African Americans. Such a legacy presents certain important challenges, such as the fact that these people might be more reluctant to trust institutions, or more protective of their autonomy, independence and privacy.

It is important for healthcare professionals to be able to provide a good service to patients that exhibit different cultural legacies. Different social groups can have different needs, and being sensitive to these is essential for healthcare professionals. If these cultural characteristics are well-understood and taken into account, we are more likely to be able to reduce disparities in health care.

Critics of the New Deal included all of the following EXCEPT: Select one: a. Upton Sinclair. b. Huey Long. c. Frances Perkins. d. Dr. Francis Townsend. e. Charles Coughlin.

Answers

Answer:

Right choice is :

a. Upton Sinclair.

Explanation:

Upton Sinclair was a leftist intellectual, a writer and polemicist and a socialist (at least in American terms)  that supported workers´rights. He supported policies of the New Deal.

As early as 1615, the __________ people of present-day southern Ontario and upper New York State forged a trading alliance with the French, and many of them converted to Catholicism.

Answers

Answer:

The Huron

Explanation:

The Huron, also called the Wyandot people, are a Canadian Native American tribe. Their origins lie in the Saint Lawrence River Valley (where French explorer Samuel de Champlain first met them), but with time the expanded to Southern Ontario as well.

The Huron established an alliance with the French. It consisted in that they would supply the French with furs in exchange for European goods such as weapons.

2. EVALUATING Which part of
the Nuclear Triad do you think was
the most important for the defense
of the nation? Why?

Answers

The  ballistic missile launching nuclear submarine.

Because It’s a nuclear missile launched by a Trident class submarine. Each of them carries an undisclosed number of nuclear warheads, with power also undisclosed, capable of transforming entire countries into nuclear deserts.

SLBMs are the most crucial part of the Nuclear Triad due to their stealth and second-strike capability, providing a significant deterrent against first strikes. Submarines can remain hidden, ensuring a viable retaliatory strike option. This strategic stability is essential for national security.

The Nuclear Triad consists of three components: land-based intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs), and strategic bombers. Each element has its importance, but SLBMs stand out as the most crucial for national defense due to their stealth and second-strike capability.

Submarines can remain hidden underwater for extended periods, ensuring that a retaliatory strike remains a viable option even if land-based assets are destroyed. This capability creates a strong deterrent against first strikes and contributes to the strategic stability essential for national security.SAC squadrons maintained bombers around the clock to enhance this deterrent effect.The navy's submarine fleets provided a critical hidden strike capability.Underground missile silos ensured a diversified defense strategy.These combined efforts formed a robust defense strategy designed to prevent nuclear conflicts through deterrence.

8. Describe the U.S. Supreme court to include the following: What type of court is the United States Supreme Court, trial or appellate? How is it ranked in the federal court system? Who oversees court cases at this level?

Answers

The US Supreme Court has been the country's top legal authority since 1788, responsible for interpreting and deciding issues based on federal law and the constitution. Although their decisions are largely based on formal arguments of justice, each president appoints a judge (at each vacancy) who has a more favorable interpretation of the government's political tendencies.

The federal courts of the United States are composed of three different levels.

The first level are district courts. These are the courts that are found in each of the 94 federal judicial districts, as well as three territorial courts. The second level is the United States courts of appeals, which are the intermediate federal appellate courts. These hear all appeals of rights from the lower courts. Finally, the Supreme Court of the United States is the court of last resort. It hears appeals from lower courts under discretionary review (it can choose which cases to hear).

Were Roman Catholic churches the most powerful institution in Western Europe during the middle ages?

•either support or refute this statement.
•must be 5-7 sentences long
•must have at least 2 pieces of evidence

Answers

Answer:

just think

Explanation:

1) How is the Emergency Quota Act of 1921 a reflection of

the U.S. practice of Nativism and Isolationism?

Answers

Answer:

Because the Act introduced the first ever quotas of a numerical nature limiting the number of immigrants that would be allowed in, It should that nativisit and isolationist sentiment was strong in the US.

Explanation:

America, in the 1920s, had become more nativist and isolationist. After the first world war, Americans was striving the maintain the image of America as a nation of immigrants from western and northern Europe and this Act sought to primarily prohibit the influx of Easter and Southern Europeans. They deemed these groups as undesirable.

What did Great Britain do to spread democratic principles in its empire?

Question 1 options:

It allowed some of its English-speaking colonies to manage their own internal affairs.


It declared war against Russia and France to protect its democratic colonies.


It made it illegal to publish newspaper articles that promoted socialism.


It granted all of its colonies independence and helped them set up democracies.

Answers

It allowed some of its English-speaking colonies to manage their own internal affairs did Great Britain do to spread democratic principles in its empire. Hence, option A is correct.

What are democratic principles?

One of the guiding principles of democracy is the freedom from unjustified governmental deprivation of one's right to life and liberty, which includes the freedoms of assembly, association, property rights, speech, inclusivity and equality, citizenship, consent of the governed, voting rights, and minority rights.

Democratic Principles the values or goals that contribute to social justice, such as equality before the law, freedom of speech, and democratic decision-making.

A kind of democracy called direct democracy, sometimes known as pure democracy, is one in which the general public makes key policy decisions on its own without the help of elected politicians. This differs from representational democracies, which make up the majority of democracies that are now in existence.

Thus, option A is correct.

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what was john adams role in the nations first secretary of state??

Answers

Answer:

Adams enjoyed unique training in diplomacy and became one of the most influential diplomats in U.S. history.

Explanation:

Name 5 States? It can be any state

Answers

Massachusetts

New Hampshire

Arizona

Kentucky

Tennessee

I could keep going on....

Georgia

Alabama

California

Tennessee

Florida

How is the adjudication hearing in the juvenile court system different from the trial in the adult criminal justice system?


A) There is a commissioner in the juvenile system and a judge in the adult system.

B) Court proceedings are closed to the public in the juvenile system and open to the public in the adult system.

C) Punishment is determined by the jury in the juvenile system and a judge in the adult system.

D) Only the prosecutor can call witnesses in the juvenile system and both the prosecution and the defense can call witnesses in the adult system.

Answers

Option B is correct regarding adjudication hearing for juvenile court.

The following information should be considered:

The court proceeding should be closed for the public in the juvenile system.But for the adult system, the court proceedings should be opened to the public.

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Who would most likely agree with this statement? Our policy is designed to help the poor, hungry people of Europe who are struggling with the chaos and devastation caused by ​ World War II ​ so free institutions can flourish again. A. Emperor Hirohito B. George Marshall C. Mao Zedong D. Nikita Khrushchev

Answers

The correct answer is George Marshall

The Marshall Plan was a US economic aid program for Western European countries with the aim of rebuilding them after World War II.

Answer:

The answer is George Marshall

Explanation:

How people in New Orleans helped fighting against the Union during civil war?

Answers

Answer:

Early in the Civil War, New Orleans became a prime target for the Union Army and Navy. The U.S. War Department planned a major attack to seize control of the city and its vital port, to choke off a major source of income and supplies for the fledgling Confederacy.

Answer:

They were not a fighting area but they were the largest city in the south.

Explanation:

The union wanted New Orleans because they were the biggest center for cotton trade

What is a major goal of the juvenile justice system?



A) to keep offenders in school


B) to make sure repeat offenders stay in prison after becoming adults


C) to punish parents for their children’s behavior


D) to correct the behavior of juvenile offenders

Answers

Answer:

I believe the correct answer is D.) to correct the behavior of juvenile offenders

Explanation:

There are a few goals that the Juvenile Justice System try to accomplish. Skill development is a huge one as with rehabilitation. This system will correct the juvenile offender so he/she won't make the mistake again.

Hope I could help! :)

Answer: its d to correct the behavior of juvenile offenders  

Explanation:

Other Questions
A vector has a magnitude of 46.0 m and points in a direction 20.0 below the positive x-axis. A second vector, , has a magnitude of 86.0 m and points in a direction 42.0 above the negative x-axis. a) Sketch the vectors A , B , and C=A+B .b) Using the component method of vector addition, find the magnitude of the vector C .c) Using the component method of vector addition, find the direction of the vector C "Identify an extraneous variable the researcher would need to control in this experiment and explain the effect it might have had on the results if it had been left uncontrolled." A state legislature passes a statute prohibiting businesses from supporting any political candidate. If some business owners challenge the constitutionality of the law in court, will the law be upheld?a. No, because the business owners' privileges and immunities have been violated.b. Yes, because the law only prohibits political speech by businesses, not by individual citizens.c. Yes, because political speech is restricted if "constitutionally permissible."d. No, because the law is an unconstitutional restriction on free speech. A bullet is fired with a muzzle velocity of 1178 ft/sec from a gun aimed at an angle of 26 above the horizontal. Find the horizontal component of the velocity. A train traveling at 27.5 m/s accelerates to 42.4 m/s over 75.0 s. What is the displacement of the train in this time period A financial statement that shows the revenue, or sales, and expenses of a business for a specific time period anddetermines if a business has a profit or a loss is called a(n)expensesrevenueIncome statementnone of the above In a certain corporation, 2/3 of the employees are men and 1/3 are women. Of the men, 5/8 are college-educated and 3/8 are not. Of the women, 2/5 are college-educated and 3/5 are not. What percentage of the employees are college-educated? What percentage of the college-educated employees are women? A square park has a diagonal walkway from one corner to another. If the walkway is 120 meters long, what is the approximate length of each side of the park? Functional groups confer specific chemical properties to the molecules of which they are a part. In this activity, you will identify which compounds exhibit certain chemical properties as well as examples of those six different compounds. Many individuals envision a career path that will enable them to fulfill the American dream. This tendency has been described by Phyllis Moen as the ________. What were amusements parks called back in the early 1900s?DisneyRollercoaster ParksFun landsTrolley Parks _______________ have enormous consequences for the behavior of most people and influence a wide range of human activities, including how we speak, dress, walk, engage in courtship, and choose a career. Select one: a. Status sets b. Differentiation rituals c. Gender roles d. Rites of passage Which key on a laptop keyboard is often used to help pair a mobile device with another device for communication purposes?BluetoothCellularDual DisplayWireless "We believe in creating loyal customers by providing a superior experience at a great value. We are committed to direct relationships, providing the best products and services based on standards-based technology, and outperforming the competition with value and a superior customer experience." This statement is a part of Dell's: The original price of a toy boat was $50. The boat is marked up 15% before its sold. What is the selling price of the boat? DEF and XYZ are similar isosceles triangles. What is the measure of X?751056030 You are an evolutionary biologist studying a population of bats in the rain forest in Brazil. Most of the population possesses moderate length wings, although some individuals have long wings and some individuals have short wings. Over the course of time, you notice that the frequency of moderate-length wings increases. You conclude that the most likely cause of this development is: a. diversifying natural selection b. stabilizing natural selection. c. directional natural selection. d. co-evolution. Reese, a calendar-year taxpayer, uses the cash method of accounting for her sole proprietorship. In late December, she received a $31,000 bill from her accountant for consulting services related to her small business. Reese can pay the $31,000 bill anytime before January 30 of next year without penalty. Assume Reese's marginal tax rate is 32 percent this year and 35 percent next year, and that she can earn an after-tax rate of return of 11 percent on her investments. a. What is the after-tax cost if she pays the $31,000 bill in December?b. What is the after-tax cost if she pays the $31,000 bill in January? Describe how to scan a stack S containing to see if it contains a particular value x using only a queue Q and a constant number of reference variables. The stack contains n values and Q is initially empty. When the process finishes, the elements of S must be in their original order. [Preferred Language in C++] Do you think it is acceptable for the government to suspend the rights of citizens when in a state of panic or emergency