(Signalling and Screening) What roles do signalling and screening play in a labour market with asymmetric information?

Metallic vanadium, V, can be obtained from its oxide from the reaction below.

V₂O₅(s) + 5Ca(l) = 2V (s) + 5CaO(s)

If 100. g of V₂O₅ is reacted with 500.0 g of Ca, how many grams of V can be produced?

Consider the following reaction

A(aq) <=> 2B(aq) Kc= 9.07x10^-6 at 500K

If a 4.90 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?

(C++ program)

Write and Design a Star Class definition.

Attribute of a Star are :
- radius
- age
- coordinates in space: x,y.z
Behaviors of a Star are:
- calculateVolume()
- calculateSurfaceArea()
- calculateCircumference()
- DisplayCoordinates()
- DisplayStar()

be sure to supply constructor() method(s) and all your set() and get() methods. The above is only a generic description of the class Star. You will need to design the datatypes, method return values, method parameters, etc...

Sphere Formulas in terms of radius r:

• Volume of a sphere:
  • V = (4/3)πr³
• Circumference of a sphere:
  • C = 2πr
• Surface area of a sphere:
  • A = 4πr²

, you will be writing a simple calculator program that gets input from the user, does some calculation, and outputs the results to the user. Your program must have at least one input and at least one output, but you can choose the type of calculator you want to write. Some examples are:

Converting Celsius to Fahrenheit,

Questions 28-35 are related to the following The following table is the regression summary output for a model depicting the impact of years of schooling (EDUCTION) on hourly wage rate (WAGE). SUMMARY OUTPUT Regression Statistics Multiple R 0.47100 R Square Adjusted R Square 0.22106 Standard Error Observations 1000 ANOVA df SS MS F Significance F Regression 1 284.5202001 2.3433E-56 Residual 142.4243578 Total 999 182662.1158 Coefficients Std Error t Stat P-value Lower 95% Upper 95% Intercept 1.6551 -3.8378 0.0001 -9.6000 -3.1041 EDUCATION 0.0000 Use the following calculations first: ∑xy = 310428.68 x = EDUCATION n = 1000 y = WAGE x̅ = 13.907 y̅ = 20.83103 ∑x² = 204011 28 The model predicts that wage rises by _______ for each additional year of schooling. a $2.16 b $2.11 c $2.05 d $1.95 29 The predicted WAGE for 16 years of schooling is, a $26.44 26.44 b $25.67 25.67 c $24.92 24.92 d $23.93 23.93 30 SSE = ______ a 142139.51 b 140718.11 c 139310.93 d 137917.82 31 The measure of closeness of fit, or measure of dispersion of observed expenditure on food around the regression line is, a 10.24 b 11.93 c 12.12 d 12.85 32 The fraction of the variations in WAGE explained by years of schooling is, a 0.2218 b 0.2440 c 0.2562 d 0.2690 33 se(b₁) = ______ a 0.312 b 0.225 c 0.198 d 0.116 34 The test statistic to test the hypothesis that years of schooling has no impact on wage is, a 18.227 b 16.868 c 14.645 d 9.936 35 The upper end of the 95% interval estimate for the population slope parameter is, a 3.16 b 2.95 c 2.18 d 1.88

Solve the following programming problems using object-oriented programming in Java. Provide the problem code and screenshot of the test run.

COIN TOSSING: Write a program that simulates the toss of a coin. Provide a menu of two options: toss and quit. Count the number of times each side of the coin appears and display the results after each toss. The program should have a method called flip() that is called, takes no arguments and returns a Coin enum value (HEADS or TAILS).

GUESS THE NUMBER: Write a program that plays a game of guess the number. Generate a random integer between 1 and 500. When the player inputs a number, evaluate if the number is too low or too high and let the user know. When the user guesses the number correctly, display how many tries it took for the user to correctly guess the number.

Create a method that receives the guess number as a parameter and returns true if the user guessed the number correctly and false if the user hasn’t guessed the number. The evaluation of high or low should occur in the method.

You can pass the value of the randomly generated number to the method or declare it as static before the main method.

Recall that a conflict of interest scenario was presented to a sample of 219 marketing researchers and that 118 of these researchers disapproved of the actions taken. (a) Let p be the proportion of all marketing researchers who disapprove of the actions taken in the conflict of interest scenario. Set up the null and alternative hypotheses needed to attempt to provide evidence supporting the claim that a majority (more than 50 percent) of all marketing researchers disapprove of the actions taken. H0: p ≤ versus Ha: p > . (b) Assuming that the sample of 219 marketing researchers has been randomly selected, use critical values and the previously given sample information to test the hypotheses you set up in part a at the .10, .05, .01, and .001 levels of significance. How much evidence is there that a majority of all marketing researchers disapprove of the actions taken? (Round Picture to 4 decimal places for calculations and z value to 2 decimal places.) Picture = z = z.10 = 1.28 Reject H0 at α = . evidence. (c) Suppose a random sample of 1,000 marketing researchers reveals that 539 of the researchers disapprove of the actions taken in the conflict of interest scenario. Use critical values to determine how much evidence there is that a majority of all marketing researchers disapprove of the actions taken. (Round Picture to 4 decimal places for calculations and z value to 2 decimal places.) Picture = z = z.001 = 3.09 Reject H0 at α = , evidence. (d) Note that in parts b and c the sample proportion Picture is (essentially) the same. Explain why the results of the hypothesis tests in parts b and c differ. Picture = .5390 based on a much larger sample provides evidence that p is greater than .50.

(MIS CHAPTER 6 PAGE 162 QUESTION 1) using your knowledge of this chapter and the intuition of the members of your team summarize the threats that cloud services present to ISVS

Virtualization technology is fundamental in enabling the development and operation of cloud computing services. It has evolved quite rapidly. These days, we are not only virtualizing desktops and servers but also networks and even entire data centers.

In this discussion, discuss the relative advantages and disadvantages of virtualization, particularly as it relates to enterprise networking and cloud computing. Ideally, you will speak from your own professional experience. If you do not have any professional experience related to virtualization technology, then base your discussion on your own research and be sure to include citations.

Voyager SkyGazer Software The directions for this lab assumes the Voyager SkyGazer Software is installed on your computer for this exercise. It has been done using different software, in particular apps for the iPhone. Question 12 may give you problems as some software won’t allow you to go back in time 2000 years. If your chosen software has this limitation, try a different internet package. If you are using a different software program, explain what “button” you need to push to accomplish the following tasks. We will explore the Voyager software package. It will allow you to see the “sky” change in a matter of minutes, changes that would take many years in the real sky. Our approach will be to present a problem or task that will require you to modify the program settings. You will then need to answer questions and submit them as your report. If you are faxing or mailing the report to me, you must include the coversheet so your work will be routed to me. Part 1: Setting time, direction of viewing and location. On the top menu, locate “Chart”; it is the third option from the left. Click “Chart” and a dropdown menu opens. The first option is “Set Time”; the second option is “Set Location”. Select “Set Location”. A scroll menu of locations appears on the left of the Set Location Box. Find and select San Francisco. Later, you can play with other locations. We want to be able to change the direction we are looking in Voyager’s sky. There are three ways of changing the view direction. First, on the top menu find “Center” to the right of “Chart”. Click “Center” and then chose your direction. Let’s look South. Another way is to use the slide bar at the bottom of the screen. Put the mouse pointer on the slide bar, hold down the left mouse button, and move the slider to the right. You will see a compass appear, indicating your viewing direction. Again, select South. Finally, you can put the mouse pointer on the sky, hold down the left mouse button, and simply drag the sky to where you want to look. Notice the mouse pointer changes to a hand when you move the sky. If you are looking south and see mostly “ground”, you can either move the slider at the right of the screen or, by holding the left mouse button down, drag the display to show more sky. Depending on when you are doing this exercise, you may have a day or a night sky. Let’s change the date and time by clicking the “Chart” option on the top menu and then selecting “Select Time”. Much ado was made about the world ending, according to the Mayan Calendar, on December 21st, 2012 due to a planetary alignment. Let’s see if the planets were aligned on this date. Let’s pick a time of 10:00 p.m. on December 21st, 2012. Enter this time into the Select Time Box. Remember, you need to be looking south.

Close all boxes on the screen except the “Time” box

Question 1: Were the planets aligned on December 21, 2012? If the planet labels are not shown, select “Display” on the top menu, then on the drop down select “labels” and make sure there is a check besides “planets”. If there is not a check, simply click on “planets”. An alignment means the planets appear together as a single object. They are always found on a path going west to east across the sky.

Question 2: In the sky, we can see at most 7 planets – we are standing on one of the planets, Earth, so we don’t see it in the sky! Remember, Pluto is not a planet! Let’s see where the planets are in the night sky. Not all the planets may be in the night sky. Change the viewing time to 5:00 p.m. by using the “Select Time” option. Again, you are looking south. Describe the order of the planets, Sun, and Moon on the ecliptic. The Sun is not visible but deduce where it must be.

Question 3: In the “Time” box open on the screen, change the “Step” to 5 minutes by clicking at the right of the Step row. Now click “Start”. Notice the sky changes as does the clock in the “Time” box. If you click “Stop”, you can stop the change of time. The other options in the same row as the “Start” button control the motion of the sky as well. What do the other four options in the Start row do?

Question 4: Let’s find in which constellations the Sun, Moon, and planets are. Place the mouse pointer near a planet (or Moon or Sun) and left mouse click. Another box should open, listing where the pointer is. For each object, record its constellation. To see all the objects, you will need to click on the Start and Stop buttons several times.

Question 5: During the night of December 21st, 2012, did the planets ever align?

Question 6: What is your explanation for your answer to Question 5?

Question 7: Reset the time back to 5:00 p.m. on December 21st, 2012. Using a step time of 5 minutes (you should not need to change this), click on “Start” in the Time Box. Describe the movement of the stars over the course of the night.

Question 8: It is said the stars rise in the east and set in the west. Discuss this statement using your observations for Question 7. Change the cardinal points (north/south/east/west).

Question 9: Now change your viewing time to 4:00 a.m. and your viewing direction to east. Leaving the step time at 5 minutes, click on “Start” in the Time Box. Click on “Stop” when you see the Sun rise. At what time did the Sun rise?

Question 10: By moving the slider at the bottom of the screen, center the Sun on the screen so it is half way between the left side of the screen and the right side. With the mouse button held down on the slider, note the direction indicated by the compass. Does the Sun always rise in the east? Justify your answer. Make large changes in the date before committing to your answer.

Question 11: Now change the Time Step to “1 day” by clicking at the right side of the Step row in the Time Box. Click the “Start” and observe the Sun for a year (by program time!). Describe the movement of the Sun.

Question 12: Look at these websites – http://www.versebyverse.org/doctrine/birthofchrist.html. http://www.themoorings.org/apologetics/chronology/Chrmas.html http://www.msnbc.msn.com/id/3077385/

By changing the location to Mideast and then Jersalem, you can investigate each of these articles in terms of the astronomy impact on the stories. You will need to make a major time change – over 2000 years! Does your investigation support or contradict the articles? I am not referring to the religious aspect of the articles; stay focused on the astronomy mentioned in the articles. Justify your response.

Question 13: Play with some of the other features (your choice!) of Voyager. Describe what you did with each action and how it changed the display. What did you learn with your selfdirected investigation?

Union Brake Inc.’s comparative balance sheet information at December 31, 2017 and 2016, and its income statement for the year ended December 31, 2017, are as follows: Union Brake Inc. Income Statement For Year Ended December 31, 2017 Sales $ 877,000 Cost of goods sold 572,000 Gross profit $ 305,000 Operating expenses $ 132,680 Depreciation expense 41,240 173,920 Operating Profit 131,080 Loss on sale of equipment 11,580 Investment income 18,520 Profit before taxes 138,020 Income taxes 16,000 Profit 122,020 Union Brake Inc. Balance Sheet Information December 31 2017 2016 Net Change Cash $ 44,000 $ 24,160 $ 19,840 Cash equivalents 24,280 8,800 15,480 Accounts receivable 87,520 33,440 54,080 Inventory 113,440 79,520 33,920 Investment 0 24,280 (24,280) Land 76,000 76,000 0 Building and equipment 423,240 441,760 (18,520) Accumulated depreciation 114,080 92,960 21,120 Accounts payable 12,480 37,000 (24,520) Dividends payable 1,600 1,000 600 Bonds payable 20,000 0 20,000 Preferred shares 80,800 80,800 0 Common shares 405,280 405,280 0 Retained earnings 134,240 70,920 63,320 During 2017, the following transactions occurred: 1. Purchased equipment for $20,600 cash. 2. Sold the long-term investment on January 1, 2017 for $42,800, resulting in investment income of 18,520. 3. Sold equipment for $7,420 cash that had originally cost $39,120 and had $20,120 of accumulated depreciation. 4. Issued $20,000 of bonds payable at face value. Required: 1. How much cash was paid in dividends? 2. Prepare a statement of cash flows for Union Brake for the year ended December 31, 2017, using the indirect method. (List any deduction in cash and cash outflows as negative amounts.)

In formal terms, a monitor is an object which only allows one of its methods to be executed at once.

For Java:

1) How could you implement a class satisfying the monitor’s fundamental mutual exclusion property – that is, a class whose instantiated objects ensured mutual exclusion among their methods? Provide a code fragment as an example.

2) Could you mutually exclude critical sections smaller than an entire method without resorting to mutex locks? If so, how?

3) How would you implement condition variables as we described them in class? Provide a code fragment as an example.

4) Does the implementation differ if you need more than one condition variable? If so, how?

Question 1: William Comanor and Thomas Wilson1 specified the following regression in their study of advertising’s effect on the profit rates of 41 consumer goods firms: PRi = β0 + β1 ×ADVi/SALESi + β2 ×lnCAPi + β3 ×lnESi + β4 ×lnDGi + i where: PRi = the profit margin of the ith firm ADVi = the advertising expenditures in the ith firm (in dollars) SALESi = the total gross sales of the ith firm (in dollars) CAPi = the capital needed to enter the ith firm’s market at an efficient size ESi = the degree to which economies of scale exist in the ith firm’s industry DGi = percent growth in sales (demand) of the ith firm over the last 10 years a) Hypothesize expected signs for each of the slope coefficients. b) Note that there are two different kinds of nonlinear (in the variables) relationships in this equation. For each independent variable, determine the shape that the chosen functional form implies, and state whether you agree or disagree with this shape. Explain your reasoning in each case. c) Comanor and Wilson state that the simple correlation coefficient between ADVi/SALESi and each of the other independent variables is positive. If one of these other variables were omitted, in which direction would ˆ β1 likely be biased? Refer to your hypothesized signs of the coefficients in part (a).

  The heart and circulatory system in vertebrates has changed significantly compared to the two-chambered heart of our fish ancestors. Describe the major changes in the general structure of the vertebrate heart starting with fish to amphibians to mammals and birds. Be sure to explain the evolutionary significance of these changes. For example, explain how changes in the heart have allowed mammals to grow large and both birds and mammals to be more active.