Two cards are drawn one after the other from a standard deck of 52 cards.

(a) In how many ways can one draw first a spade and then a heart?
(b) In how many ways can one draw first a spade and then a heart or a diamond?
(c) In how many ways can one draw first a spade and then another spade?

(d) Do the previous answers change if the first card is put back in the deck before the second card is drawn?

Identify factors that determine whether performance appraisals develop and motivate staff or discourage and demotivate staff. Identify biases that influence an individuals' ability to do a fair and objective performance appraisal. Identify what conditions should be present, before, during and after the performance appraisal that will increase the likelihood of a positive outcome. What experiences have you had with performance appraisals. Evaluate your personal experience with performance appraisals based on your readings. Were they successful in motivating you, why or why not.

A 74 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 26 m/s. If the player was moving upward with a speed of 4.0 m/s just before impact, what will be the speed of the ball immediately after the collision if the ball rebounds vertically upwards and the collision is elastic?
If the ball is in contact with the player's head for 20 ms, what is the average acceleration of the ball? (Note that the force of gravity may be ignored during the brief collision time.)

Washington Irving, “Rip Van Winkle”

1. How does Rip's "meekness of spirit" gain him popularity?

2. Why do the children follow Rip?

3. Discuss the description of the "amphitheater" before Rip falls asleep. Compare it to the description after he awakens. What is the significance?

4. Discuss the meaning of the changes at the village inn. In what ways does the behavior of the patrons change? What inspired the changes? What does this convey about human nature?

Colter Steel has $5,550,000 in assets. Temporary current assets $ 3,100,000 Permanent current assets 1,605,000 Fixed assets 845,000 Total assets $ 5,550,000 Short-term rates are 9 percent. Long-term rates are 14 percent. Earnings before interest and taxes are $1,170,000. The tax rate is 40 percent. If long-term financing is perfectly matched (synchronized) with long-term asset needs, and the same is true of short-term financing, what will earnings after taxes be?

SGX

1. Why is the initial program loaded into an SGX enclave unencrypted?
2. What does a client program have to verify before passing secrets to an SGX enclave?
3. What state must be encrypted to protect the contents of an SGX enclave from the operating system or virtual machine monitor?
4. Suppose code in an SGX enclave is waiting for data to arrive and calls the read() system call. What conditions must it check after the read() call returns to make sure it executes correctly?

At 700 K acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction is:
CH3CHO(g)→CH4(g)+CO(g)
A sample of CH3CHO is heated to 700 K and the pressure is measured as 0.43 atm before any reaction takes place. The kinetics of the reaction are then followed by measurements of total pressure and these data are obtained:

Question:

Find total pressure after 1.39×10⁴ s .

On April 1 1992, NJ increased its minimum wage to $5.05, at the time the highest minimum wage in the country. David Card and Alan Krueger saw an opportunity to understand how the minimum wage affects employment. They surveyed fast food restaurants in February 1992 (before increase) and November 1992 (after increase) in both NJ and in PA (which did not change its minimum wage in this time period). The survey asked how many employees they had. They then ran the following regression:

Employees = α + β1NJ + β2November + β3(NJ × November) + ϵ

Where NJ = 1 if the restaurant is in NJ and = 0 if in PA; November = 1 if the response is from November (after increase) and = 0 if response is from February (before increase); Employees are the number of full-time employees. They estimated that: βˆ 3 = 2.76 with a standard error of 1.36

a) What is the t-statistic for the estimate of βˆ 3? Given that our sample size is large, how is the t-statistic distributed? How do you know this?

b) Is βˆ 3 significant at the 5% level? How do you know? Why did you make the comparison you did to answer this?

c) How do you interpret β3?

d) Why were (some) economists surprised by this result?

In order to raise revenues, the government has decided to levy taxes (T) on luxury goods purchased by taxpayers with earnings higher than the average income. The demand and supply curves of yacht before taxes are follows: (20 points total) QS=0.5P QD=600-P A. Compute the existing equilibrium price (P*) and quantity (Q*). (2 points) B. i. State the new equation of demand curve. (2 points) ii. Compute new equilibrium quantity (Q’). (2 points) iii. Compute market price received suppliers (PS). (1.5 points) iv. Compute the price paid by consumers (PD) after taxation. (1.5 points) C. Compute consumer surpluses (CS), producer surplus (PS), and total surplus (TS) before tax. (2 points) D. Compute consumer surpluse (CS’), producer surplus (PS’), tax revenues (TR) and total surplus (TS’) after tax. (T=300) (3 points) E. Estimate dead-weight loss (DWL) of a tax (T=300) and state why taxes cause dead- weight loss. (3 points) F. State the function of tax revenues with respect to T. Draw the graph and its implication. Evaluate the tax policy at T=400. (3 points)

1.Matt recently deposited $30,000 in a savings account paying a guaranteed interest rate of 4 percent for the next 10 years. If Matt expects his marginal tax rate to be 22 percent for the next 10 years, how much interest will he earn after-tax after the fourth year of his investment if he withdraws enough cash every year to pay the tax on the interest he earns?  

2. Dana intends to invest $25,000 in either a Treasury bond or a corporate bond. The Treasury bond yields 5 percent before tax and the corporate bond yields 6 percent before tax. Dana’s federal marginal rate is 25 percent and her marginal state rate is 5 percent. What is the amount by which the yield on the corporate bond exceeds the yield on the Treasury bond.  Assume that Dana itemizes her deductions and that any state income tax would be fully deductible.  

3.Hayley recently invested $40,000 in a public utility stock paying a 3 percent annual dividend. If Hayley reinvests the annual dividend she receives net of any taxes owed on the dividend, how much will her investment be worth in four years if the dividends paid are qualified dividends? (Hayley’s marginal income tax rate is 32 percent.)