Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 9.63 hours of sleep, with a standard deviation of 2.92 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed.

(a) What is the probability that a visually impaired student gets at most 6.3 hours of sleep? Express your answer as a percent rounded to 2 decimal places. e.g. 1.23% Do not include the % symbol in your answer.

(b) What is the probability that a visually impaired student gets between 8 and 9.02 hours of sleep? Express your answer as a percent rounded to 2 decimal places. e.g. 1.23% Do not include the % symbol in your answer.

(c) What is the probability that a visually impaired student gets at least 8.2 hours of sleep? Express your answer as a percent rounded to 2 decimal places. e.g. 1.23% Do not include the % symbol in your answer.

(d) What is the sleep time that cuts off the top 33 % of sleep hours? Round your answer to 2 decimal places.

(e) If 400 visually impaired students were studied, how many students would you expect to have sleep times of more than 9.02 hours? Round to the nearest whole number.

(f) A school district wants to give additional assistance to visually impaired students with sleep times at the first quartile and lower. What would be the maximum sleep time to be recommended for additional assistance? Round your answer to 2 decimal places.

What would be your highest marginal tax rate for you to prefer a corporate bond paying 7.81% to a tax-exempt municipal bond paying 5%? Round your answer to 4 decimal places. For example, if your answer is 3.205%, then please write down 0.0321.

Matt Barnes has a choice of two 5-year bonds and is seeking the highest return. Given the following information about each bond, which one should he choose?

Bond A's coupon is 7.40% and is priced at 98.90 per 100

Bond B's coupon is 7.05% and is priced at 97.17 per 100

Because of the COVID-19 pandemic recession the unemployment rate spiked to more than 15% (the highest level since the Great Depression of the 1930s) and has slowly declined to a 7.9% in September. In response, the Federal Reserve has taken increased the money supply by more than 40% between February and September. This effort was made to prevent a financial crisis and lower interest rates.

The inflation rate fell from 2.3% before the recession to 1.4% in September. Given the information in the paragraph above, was this decline in inflation better predicted by monetarist economic theory or Keynesian economic theory? Please write your answer in the text box below. Please DO NOT write out an explanation, just your answer to the question.

24.  The Trump administration has increased tariffs (taxes on imports) on imports from China.  Most of the tariffs are in so-called intermediate goods, used to produce goods and service in the United States. This will raise the  cost of producing U.S. goods that are made with Chinese parts and cause:

Group of answer choices

A aggregate demand to decrease.

B aggregate demand to increase.

C aggregate supply to increase.

D aggregate supply to decrease.

Which of the following solutions would have the highest vapor pressure.

Which solution has the highest concentration of NaCl?

A. 175 g NaCl in 1.0 L

B. 58.5 g NaCl in 1.5 L

C. 29.3 g NaCl in 0.5 L

D. 2.5 mol NaCl in 2.0 L

E. 5.0 mol NaCl in 3.0 L

Population(s) affected: What population(s) is/are at highest risk of contracting the disease? Are there any groups of people who should be tested? Please include statistical/geographical data and trends (from the Centers for Disease Control and Prevention, World Health Organization, or other source [http://www.cdc.gov, http://www.who.int, etc.]).

11. Which one of the following investments provides the highest effective annual rate of return (i.e., which of the following investments represents the largest EAR), assuming an investor wants to avoid earning the lowest return over an investing horizon of 10 years? a. An investment which has a 3.0 percent nominal rate with annual compounding. b. An investment which has a 2.98 percent nominal rate with semi-annual compounding. c. An investment which has a 2.965 percent nominal rate with quarterly compounding. d. An investment which has a 2.9575 percent nominal rate with monthly compounding. e. An investment which has a 2.955 percent nominal rate and daily (365) compounding.

ETHICAL RESPONSIBILITY ON MOUNT EVEREST
Many mountain climbers dream of scaling the highest mountain on Earth. It is a dangerous venture and some of them die in pursuit of this dream every year, including a 33-year-old Canadian woman in May 2012. The following describes one situation involving the ethics and responsibilities of climbers toward one another.

Page 105
In May 2006, several climbing parties passed by David Sharp, 34, who was near death at 28,000 feet on Mount Everest. He later died alone, without companionship in his final hours. He was one of 11 who perished during the 2006 climbing season and one of more than 200 who have died attempting to climb the mountain.

One climber to leave Sharp was Mark Inglis, 47, a New Zealander who was climbing the mountain on artificial legs. He and his party stopped to consider Sharp’s situation. He was in poor condition and near death, but was given oxygen. Rescue was not feasible as helicopters cannot operate at that altitude. The lives of Inglis’s party would likely have been endangered trying to move Sharp to a base camp.

It was disclosed that Sharp’s group was loosely organized without a leader. The members of the group appeared to be functioning independently according to an expedition outfitter. The outfitter said that Sharp’s group did not have sufficient oxygen and climbed without a Sherpa guide.

Discussion of the incident was extensive. One position presented was that climbers do not endanger themselves to save another. Furthermore, looking after another climber may jeopardize one’s own chance at climbing the mountain. Sir Edmund Hillary, who, with his Sherpa Tenzing Norgay, became the first to reach the summit of Mount Everest, said that human life is more important than conquering mountains. Others suggested that the incident was an example of a lack of sense of responsibility and caring for one another.

Questions
What ethical principles are involved in this situation?

Why blame Inglis?

Who is responsible?

Should the climbing of Mount Everest be regulated?

may i have the answers with relevant explanations please