8. In a hospital, 30% of the staff are female, and 50% of the staff walk to hospital. If 20% of the staff is female and walk to hospital, what is the probability that a randomly chosen staff is female or walks to hospital?

9. A card is drawn randomly from a standard deck of cards. What is the probability that the card drawn is a 2 or a Spade? Details and Assumptions: A standard deck of cards consists of 52 cards, formed by 13 ranks (Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen and King) of 4 suits (clubs, diamonds, hearts and spades).

Work & Rest is an all inclusive hotel operating as a monopoly in a mid-sized community. The manager estimates that the hotel's total costs are described by the equation C = 0.05Q² + 10Q + 15000, where Q is the number or persons serviced and P is the price paid per person. Although it is located in a mid-sized community, it is close to a major highway that runs along the east coast. Often times, travelers would use the services of Work & Rest as a stop in their commute between two major citys. As such, the market demand for its service is described by the equation P = 160 - 0.2Q.

1. Given the current market conditions, Work & Rest's profit-maximizing quantity is Blank 1 and the price charged per person is Blank 2 ( 4 points)

Consider that after a series of reports from special interest groups, the local government decides to regulate Work & Rest by using the optimal pricing policy.

2. Given the successful implementation of the government's policy, Work & Rest's profit-maximizing quantity is Blank 3 (2 points)

3. Given the successful implementation of the government's policy, what is Work & Rest's profit at its profit maximizing quantity? Blank 4 (4 points)I

4. If the policy remains in place, and there are no further external shocks to the market, is it likely that West & Rest will continue to operate and provide service? (In the space provided enter will or will not)

In the long run, West & Rest Blank 5 continue to provide service in this mid-sized community. (2 points)

Really Cheap Used Computers, Inc. is an online seller of old school computers. The organization’s e-commerce Web

site runs on a Linux server. The server is located at the organization’s local office in Boston, Massachusetts. The

company has experienced tremendous growth and has hired you as the new security analyst. You access the server

and find that there are no layers of security other than the passwords set for user accounts.

Discuss at least three layers of access control that can be put in place on this server to create a more secure

environment. Rationalize whether the given scenario represents discretionary access control (DAC) or mandatoryaccess control (MAC).

Participate in this discussion by engaging in a meaningful debate regarding your choices of the three layers of

access control in Linux. You must defend your choices with a valid rationale. Summarize your thoughts in a Word

document and submit it to your instructor

Should be 1-2 pages

Self-Assessment Checklist



I identified at least three layers of access controls that can be used to create a secure Linux server

environment.



I determined whether the given scenario represented DAC or MAC.



I engaged in a discussion of the assigned topic with at least two of my peers.



I supported my arguments with data and factual information.



I compared and contrasted my position with the perspectives offered by peers.



I raised questions and solicited peer and instructor input on the topics discussed.



I articulated my position clearly and logically.



I followed the submission requireme

In a maze running study, a rat is run in a T maze and the result of each run recorded. A reward in the form of food is always placed at the right exit. If learning is taking place, the rat will choose the right exit more often than the left. If no learning is taking place, the rat should randomly choose either exit. Suppose that the rat is given n = 100 runs in the maze and that he chooses the right exit x = 63 times. Would you conclude that learning is taking place? (Use α = 0.01.)

State the null and alternative hypotheses.

H₀: p ≠ 0.63 versus H_a: p = 0.63H₀: p = 0.63 versus H_a: p ≠ 0.63    H₀: p = 0.5 versus H_a: p > 0.5H₀: p = 0.5 versus H_a: p ≠ 0.5H₀: p < 0.5 versus H_a: p > 0.5

Find the test statistic and the p-value. (Round your test statistic to two decimal places and your p-value to four decimal places.)

State your conclusion.

The p-value is less than alpha, so H₀ is rejected. There is insufficient evidence to indicate that learning is taking place.The p-value is greater than alpha, so H₀ is not rejected. There is sufficient evidence to indicate that learning is taking place.    The p-value is less than alpha, so H₀ is rejected. There is sufficient evidence to indicate that learning is taking place.The p-value is greater than alpha, so H₀ is not rejected. There is insufficient evidence to indicate that learning is taking place.

please answer step by step

**C++**

Output each floating-point value with two digits after the decimal point, which can be achieved by executing
cout << fixed << setprecision(2); once before all other cout statements.

(1) Prompt the user to input a wall's height and width. Calculate and output the wall's area. (2 pts)

Note: This zyLab outputs a newline after each user-input prompt. For convenience in the examples below, the user's input value is shown on the next line, but such values don't actually appear as output when the program runs.

Enter wall height (feet):
12.0
Enter wall width (feet):
15.0
Wall area: 180.00 square feet

(2) Extend to also calculate and output the amount of paint in gallons needed to paint the wall. Assume a gallon of paint covers 350 square feet. Store this value using a const double variable. (2 pts)

Enter wall height (feet):
12.0
Enter wall width (feet):
15.0
Wall area: 180.00 square feet
Paint needed: 0.51 gallons

(3) Extend to also calculate and output the number of 1 gallon cans needed to paint the wall. Hint: Use a math function to round up to the nearest gallon. (2 pts)

Enter wall height (feet):
12.0
Enter wall width (feet):
15.0
Wall area: 180.00 square feet
Paint needed: 0.51 gallons
Cans needed: 1 can(s)

You want to come up with a plan to save for retirement. You will contribute to your retirement account monthly for 40 years. One month after your last contribution you will begin monthly withdrawals of $7,500 from that retirement account. You earn 6.6% APR while you’re contributing to your retirement savings and 3.6% APR while you are withdrawing. You want to have enough money to finance 35 years in retirement. (Assume compounding frequencies match the payment frequencies.)

What kind of cash flow pattern are the retirement withdrawals?

a.Lump sum b.Annuity c. Perpetuity d. Growing perpetuity

What variable would you solve for to find the value of all the retirement withdrawals at the beginning of retirement?

a. Present value b. Payment c.Interest rate d. Time e. Future Value

What is the value of the retirement withdrawals at the beginning of retirement?

What kind of cash flow pattern is the savings contributions?

a. Lump sum b. Annuity c. Perpetuity b. Growing perpetuity

What variable would you solve for to find the monthly savings contribution?

a. Present value b. Payment c. Interest rate d. Time e. Future Value

What is the monthly savings contribution you must make to fully fund your retirement?

a) Use the Histogram tool to develop a frequency distribution for the number of days and the browser used as a customer of this online store. Use your judgement for determining the number of bins to use.

b) Construct complete histogram graphs and numerical descriptions (that is, histograms and measures of location and dispersion) for the length of time the shopper spends on the website and the amount spent per transaction.

c) The company would like to investigate the effect that the day of the week have on sales. Summarize the total dollars spent and the mean amount spent per transaction for each day of the week. Briefly discuss your findings.

Find the NPV -company considering new car that will cost 1m -it will save 275,000 a year in costs -car will last for 5 yrs, depreciated at a CCA rate of 20%. -car salvage value is 50,000 at the end of yr 5 -no impact on net working capital -margin tax rate is 40%. -required return is 8%

use formula or finance calculator to show work