When a monopolist changes from charging a single price to perfect price discrimination, it
a. Reduces the quantity produced and maintains profits at a fixed level.
b. Reduces the firm’s profits and output.
c. Increases consumer surplus and decreases producer surplus.
d. Increases profits and eliminates consumer surplus

A medical researcher believes that a drug changes the body's temperature. Seven test subjects are randomly selected and the body temperature of each is measured. The subjects are then given the drug, and after 30 minutes, the body temperature of each is measured again. The results are listed in the table below. Is there enough evidence to conclude that the drug changes the body's temperature? Let d=(body temperature after taking drug)−(body temperature before taking drug) . Use a significance level of α=0.02 for the test. Assume that the body temperatures are normally distributed for the population of people both before and after taking the drug. Subject 1 2 3 4 5 6 7 Temperature (before) 100.7 99.5 97.7 100.1 99.8 98.4 98.7 Temperature (after) 100 98.7 98 99.6 99.3 98 98.2 Step 1 of 5: State the null and alternative hypotheses for the test Step 2 of 5: Find the value of the standard deviation of the paired differences. Round your answer to two decimal places. Step 3 of 5: Compute the value of the test statistic. Round your answer to three decimal places. Step 4 of 5: Find the p-value for the hypothesis test. Round your answer to four decimal places. Step 5 of 5: Draw a conclusion for the hypothesis test.

Provide a discussion of a contemporary oligopoly, outlining its pricing decisions and reactions to price changes. (Answer should be 1.5 typed pages long)

Using the natural rate model, explain and diagrammatically represent the changes in P, Y, W, and N (in both long and short run) as a result of a rise in the money supply. Also draw the short-run and long-run phillips curves that are consistent with the results.

Consider the structural changes that occur in the following molecules. BH3, CH4, NH3, H2O, HF

a. according to Lewis and VSEPR theory, why doe these changed occur?

b. what are the ideal bond angles for each structure, and which are expected to be distorted?

1.(i) Using the AD/AS model, discuss the changes to the economy that the Phillips curve explains well, and describe under what conditions the Phillips curve fails to explain economic behavior. Include graphs of the Phillips curve and the AD/AS model in your answer

2.(ii) In the late 1990s, the U.S. economy experienced a period of extremely low inflation and extremely low unemployment. Use the AD/AS model to explain what sort of change in the economy would cause this. Include a graphical analysis in your answer, and provide two examples of what might bring about this event.

****Please do not copy another post's answer******I am looking for an original response that is easy to understand.

Materials are subject to changes from temperature. We know there are several states of matter: solid, liquid, gas, and plasma. However, within a solid-state, materials have their properties affected, in particular brittleness. The Liberty ships of the Second World War were often breaking from cold weather.

These failures highlighted a material fracture problem.

What causes these failures, what materials are affected, and are there any that are not? How is brittleness calculated and measured (types of measurement) and what does this means for aircraft material selection and design considerations? You may include the influence of this problem from a maintenance perspective.

Your report of a minimum of 2,000 words is due for this assignment.

University officials hope that changes they have made have improved the retention rate. In 2018, a sample of 1926 freshman showed that 1400 returned as sophomores. In 2019, a sample of 2011 freshman showed that 1508 returned as sophomores. Determine if there is sufficient evidence at the 0.05 level to say that the retention rate has improved.