A healthy 26-year-old woman sustained a significant crush injury to her right upper extremity while on the job at a local construction site. She was brought to the emergency department and subsequently underwent pinning and reconstructive surgery and received perioperative broad-spectrum antibiotics. Her blood pressure remained normal throughout her hospital course. On the second hospital day, a medical consultant noted a marked increase in her creatinine, from 0.8 to 1.9 mg/dL. Her urine output dropped to 20 mL/h. Serum creatine kinase was ordered and reported as 3400 units/L.

Questions

What are the primary causes of this patient’s acute kidney injury? How should her kidney injury be categorized (as prerenal, intrarenal, or postrenal)?

How should she be treated?

A bakery must decide how many pies to prepare for the upcoming weekend. The bakery has the option to make 50, 100, or 150 pies. Assume that demand for the pies can be 50, 100, or 150. Each pie costs $5 to make and sells for $7. Unsold pies are donated to a nearby charity center. Assume that there is no opportunity cost for lost sales.

7) Refer to the information above.

a. Which alternative should be chosen based on the maximax criterion?

b. Which alternative should be chosen based on the maximin criterion?

c. Which alternative should be chosen based on the Lapalce criterion?

d. Which alternative should be chosen based on criterion of realism with alpha = 0.8?

e. Which alternative should be chosen based on the minimax regret criterion?

(PLEASE ANSWER IN EXCEL SPREADSHEET)

A mystery planet and its moon are found revolving around a nearby star. The star is a K3 Main Sequence star with a mass of approximately 0.8 M☉ and a radius of 0.78 R☉. The planet is believed to be terrestrial (Earth-like, and therefore of a similar density) and has an observed orbital period of 243 days. The moon orbits the planet every 13.2 hours with an average orbital radius of 19,600 km. Using this information, find:

(a)the orbital radius of the planet,

(b)the distance at which another planet in the system would have an orbital speed of 24,000 m/s,

(c)the point between the star and the planets at which the net force on a spacecraft would be zero, and

(d)the period of a 80-cm long simple pendulum with a mass of 30 grams that is swinging on the planet’s surface

Knarfappaz Co. pays no taxes and is financed entirely by common stock. The stock has a beta of 0.8 and a price-earnings ratio of 12.5 and is priced to offer an 8% expected return. Knarfappaz now decides to repurchase half the common stock and substitute an equal value of debt. If the debt yields a riskfree 5%, calculate: A. The beta of the common stock after the refinancing; B. The required return and risk premium on the stock before the refinancing; C. The required return and risk premium on the stock after the refinancing; D. The required return on the debt; E. The required return on the company (i.e., stock and debt combined) after the refinancing. Assume that the operating profit of the firm is expected to remain constant in perpetuity. Give: F. The percentage increase in expected earnings per share; G. The new price/earnings ratio (P/E).

You are on a research team that is investigating the mean temperature of adult humans. The commonly accepted claim is that the mean temperature is about 98.6 degrees F. You want to show that this claim is false. How would you write the null and alternative hypothesis?

Now assume that you have a sample of 35 adults and their mean temperature is 97.8 and the standard deviation of the temperatures is 0.8 Complete the test with alpha = 0.01

1. What is the p-value and why? How did you calculate that?
2. What is the 95% confidence interval based on this sample?
3. Complete the test with critical values and provide the answer ( reject or not)?
4. Complete the test with p-value (reject or not)?
5. Do you reject or not reject the claim, the null or the alternative and why? Is it always like this?
6. What is your conclusion??? Is your conclusion related to the null, the alternative of the claim and why? Is it always like this?

Q 2?Rafique Inc. makes product A and sells at selling price of SAR 45 per unit. Badr Inc. wants to buy 5,000 units at SAR 27 per unit. Rafique Inc. has a normal capacity of 101,000 units and projected sales to regular customers this year is 92,000 units. Per unit costs traceable to the product (based on normal capacity of 92,000 units) are listed below?

Direct Materials??8.1

Direct Labour?`??6.0

Variable Mfg. Overhead?6.2

Fixed mfg. overhead??4.8

Fixed administrative costs?0.8

Fixed Selling Costs??0.4

Does the quantitative analysis suggest that the company should accept the special order?

k   Q 3 Discuss the qualitative factors in Keep or Drop Decision in details.

A three-phase 60-Hz transmission line is energized with 420 kV at the sending end. This line is lossless and 400 km long with ? = 0.001265 rad/km and ?? = 260 Ω. a) Suppose a three-phase short-circuit occurs at the receiving end. Determine the receiving end current and the sending end current. b) Determine the reactance and MVar of a shunt reactor to be installed at the load bus to limit the no-load receiving-end voltage to 440 kV. c) When the line delivers 800 MVA at 0.8 lagging power factor, a shunt capacitor bank is installed at the receiving end to improve the line performance. Determine the total Mvar and the capacitance of the Δ-connected capacitor bank to keep the receiving-end voltage at 400 kV when the sending-end voltage is 420 kV.

1. Consider two blood vessels that have the same length and resistance. Given these pressure
differentials along their lengths, which one will have the greatest flow? Why?
Vessel 1: P1 = 100 mmHg, P2 = 25 mmHg
Vessel 2: P1 = 500 mmHg, P2 = 400 mmHg

2. A healthy student requires a cardiac output of 4000mL per minute to support resting activity. The interval between beats is 0.8 secs.

In moderate exercise, such as walking, the student’s heart rate climbed to 135BPM, end diastolic volume decreased to 100mL and ejection fraction was 80%.

i. What is cardiac output?

ii. Why would end diastolic volume decline under these circumstances?

iii. What other changes may occur with exercise?

2. Arcarde Ltd issues both ordinary shares and preference shares to raise capital, in which 500,000 ordinary shares have been issued at the price of $10 and 100,000 preference shares with a par value of $100.

a. Company promises to pay an annual dividend rate of 6.5% per share for its preference shares. If similar investment has a rate of return of 10% p.a, what is the fair price of Arcarde’s preference share?

b. Company also plans to pay dividend for its ordinary shares as follow: Y1 (next year): $0.8; Y2: $1; Y3: $1, after year 3, the dividend will growth at the rate of 3% and company’s rate of return is currently 9%, what should be the fair price of each ordinary shares?

1. (13pt) The U.S. Census Bureau computes quarterly vacancy and homeownership rates by state and metropolitan statistical areas. The following data are the rental vacancy rates in percentage (%) grouped by region for the last quarter of 2018 using a sample of 4 statistical metropolitan areas.

                                     Vacancy rates (%)

1. (10pt) You are hired as statistician to test whether there are any differences among the regions regarding vacancy rates and you should allow for 10% error.

2. (3pt) Do you think that the mean vacancy rate is the same for these regions? Why?