itsnafeesahmad1997

Let f : A → B, g : B → C be functions on non-empty sets A, B, C. Let g ◦ f be bijective. Prove that g is injective if and only if f is surjective.

A motorboat traveled 60 miles downstream in 3 hours. It requires5 hours to mke the return trip against the current. Find the rateof the boat in still water and the rate of the current.

A boater drove a motorboat upstream a distance of 46 miles and then immediately drove back to the starting point.  The total time of the trip was 3.5 hours.  If the rate of the current was 4 mph, how fast would the boat have traveled in still water?

Working together, two roommates can paint their apartment in 6 hours.  Working alone, one person can complete the job in 2 hours LESS time than the other person working alone.  How long would each person take working alone?

a

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technology is the most important factor that strongly drives the deal activity

why you think technology is the most critical economic driver????????

The basic economic ideology concerning market activity in Feudal times arose from the Church via Canon Law and enforced by religious beliefs and the guilds.

Name, describe, and explain two important factors that helped undermine the feudal economic structure and open the door for the emergence of the mercantile society. Be sure to in - clude an explanation of why these factors were important. These elements may have an ideolo-gical, political, or economic connection.

Does the Crusades and the Black Death are a good two key factors that helped erode the Feudal economic structure and pave the way for the emerging mercantile society???

What happens to the width of the interval if the confidence level goes from 95% to 99%?

No, as it does not contain the conference Interval.

What would happen to the width of the interval if the sample size was n=9?

As the margin of error decreases when sample size increases. Hence, the confidence interval becomes wider.

What would happen to the width of the interval if the sample size was n=100?

If n = 100 then, the 95% confidence interval is given by; = xbar - + tc*(sigma/sqrt(n))

= 12.6 -+ 1.96*(1.96/sqrt(100)) C.I (12.09,13.10). As the margin of error decreases when sample size increases. Hence, the confidence interval becomes narrower.

Please answer in more detail?

Please help asap read the Social Media summary and then answer the questions:

It seemed that Essena O'Neill had the perfect life. In 2015, the eighteen-year-old Australian model and vegan advocate had over a half million followers on the social media platform Instagram. O'Neill found that she was able to make an income by marketing products to her social media followers, sometimes earning as much as $2,000 for a single post. O'Neill was young and beautiful, and many of her Instagram posts featured images of her smiling

In October 2015, O'Neill publicly disavowed her Instagram persona. She explained that she had spent her teenage years addicted to social media and seeking social approval: "I spent hours watching perfect girls online, wishing I was them. Then I was 'one of them.' I still wasn't happy, content or at peace with myself." O'Neill revealed the lengths to which she would go in order to get the right pose for her next Instagram photo, sometimes sucking in her stomach to appear extremely thin. She would obsessively check the number of "likes" she got on her photos. O'Neill described the insecurity behind her Instagram persona, saying that "I just want young girls to know this isn't candid life, or cool or inspirational. It's contrived perfection made to get attention." There is a growing body of research looking at whether social media is making us unhappy. A recent study found that the more you use Facebook over time, "the more likely you are to expe-nience negative physical health, negative mental health and negative life satisfaction." A 2017 study of eighteen- to twenty-two-year-olds found an association between time spent on social media and "anxiety symptoms and the greater likelihood of an anxiety disorder." Some people believe that quitting social media might also improve your mood

Questions

Does social media give us a distorted view of what constitutes a good life, or what it looks like for someone's life to go well?

Would a hedonist think there is anything wrong with extensively using social media? Why or why not?

3. According to the desire satisfaction theory, is there anything wrong with extensively using social media? Why or why not?

what signs are seen in Nike?

Subject-civics

Name and describe with some detail (at least three sentences each) the functions of each branch of the American government..

A distillation column is separating n-hexane from n-heptane using 1-inch ceramic Berl saddles. The allowable flooding in the column is 50%. Average column pressure is 1 atm. Separation in the column is essentially complete, so the distillate is almost pure hexane and the bottoms is almost pure heptane. Feed is a 50-50 mixture and is a saturated liquid. In the top, L/V = 0.8. If F = 1000 lbmol/h and D = 500 lbmol/h, estimate the column diameter required at the top. Properties: n-Hexane: MW 86.17, bp 69°C = 342 K, sp grav = 0.659, viscosity (at 69°) = 0.22 cP n-Heptane: MW 100.2, bp 98.4°C = 371.4 K, sp grav = 0.684, viscosity (at 98.4°) = 0.205 cP You may assume ideal gas for vapor densities and Water density at 69°C = 0.9783 g/ml.

Explain structure of eye

A mixture of 45 mole % n-hexane and 55 mole % n-heptane is subjected to continuous fraction in a tray column at 1 atm total pressure. The distillate contains 90% n-hexane and the residue contains 10% n-hexane. The feed is saturated vapour. The relative volatility of n-hexane in mixture is 2.56. Determine the minimum reflux ratio for this separation.

Describe two ways in which otitis media can impair hearing permanently

The number of visits to a website is known to have a Poisson distribution with a mean of 10 visits per minute.

(a) What is the probability distribution for x, the number of visits per minute? p(x) =       

(b) What is the probability that the number of visits per minute is less than or equal to 11? (Round your answer to three decimal places.)

(c) What is the probability that the number of visits per minute is greater than 15? (Round your answer to three decimal places.)

(d) Within what limits does Tchebysheff's Theorem suggest you would expect the number of visits to this website to lie at least 89% of the time? (Round your answer up to the nearest whole number.) 0 to  visits

According to a study conducted by a university, children who are injured seven or more times tend to sustain these injuries during a relatively limited time, usually 1 year or less. Let the average number of injuries per year for school-age children be seven.

(a) Calculate the mean and standard deviation for x, the number of injuries per year sustained by a school-age child. (Round your answers to three decimal places.) 𝜇=  injuries 𝜎=  injuries

(b) According to Tchebysheff's Theorem, within what limits would you expect the number of injuries per year to fall at least three-quarters of the time? (Round your answer up to the nearest whole number.) 1  injury to   injuries

The increased number of small commuter planes in major airports has heightened concern over air safety. An eastern airport has recorded a monthly average of nine near misses on landings and takeoffs in the past 5 years. (Round your answers to three decimal places.)

(a) Find the probability that during a given month there are no near misses on landings and takeoffs at the airport . 

(b) Find the probability that during a given month there are three near misses.

(c) Find the probability that there are at least three near misses during a particular month.

For the past several years, Emily Page has operated a part-time consulting business from her home. As of June 1, 2010, Emily decided to move to rented quarters and tooperate the business, which was to be known as Bottom Line Consulting, on a full-timebasis. Bottom Line Consulting entered into the following transactions during June:
June 1. The following assets were received from Emily Page: cash, $20,000; accounts receivable, $4,500; supplies, $2,000; and office equipment, $11,500. There were no liabilities received.
1. Paid three months’ rent on a lease rental contract, $6,000.
2. Paid the premiums on property and casualty insurance policies, $2,400.
4. Received cash from clients as an advance payment for services to be provided and recorded it as 
unearned fees, $2,700.
5. Purchased additional office equipment on account from Office Depot Co., $3,500.
6. Received cash from clients on account, $3,000.
10. Paid cash for a newspaper advertisement, $200.
12. Paid Office Depot Co. for part of the debt incurred on June 5, $750.
12. Recorded services provided on account for the period June 1–12, $5,100.
14. Paid part-time receptionist for two weeks’ salary, $1,100.
17. Recorded cash from cash clients for fees earned during the period June 1–16, $6,500.
18. Paid cash for supplies, $750.
20. Recorded services provided on account for the period June 13–20, $3,100.
24. Recorded cash from cash clients for fees earned for the period June 17–24, $5,150.
26. Received cash from clients on account, $6,900.
27. Paid part-time receptionist for two weeks’ salary, $1,100.
29. Paid telephone bill for June, $150.
30. Paid electricity bill for June, $400.
30. Recorded cash from cash clients for fees earned for the period June 25–30, $2,500.
30. Recorded services provided on account for the remainder of June, $1,000.
30. Emily withdrew $5,000 for personal use.



Instructions
1. Journalize each transaction in a two-column journal, referring to the following chartof accounts in selecting the accounts to be debited and credited. (Do not insert theaccount numbers in the journal at this time.)
11 Cash    31 Emily Page, Capital
12 Accounts Receivable   32 Emily Page, Drawing
14 Supplies     41 Fees Earned
15 Prepaid Rent    51 Salary Expense
16 Prepaid Insurance    52 Rent Expense
18 Office Equipment    53 Supplies Expense
19 Accumulated Depreciation   54 Depreciation Expense
21 Accounts Payable    55 Insurance Expense
22 Salaries Payable    59 Miscellaneous Expense
23 Unearned Fees

2. Post the journal to a ledger of four-column accounts.
3. Prepare an unadjusted trial balance.
4. At the end of June, the following adjustment data were assembled. Analyze and use these data to 
complete parts (5) and (6).
a. Insurance expired during June is $200.
b. Supplies on hand on June 30 are $650.
c. Depreciation of office equipment for June is $250.
d. Accrued receptionist salary on June 30 is $220.
e. Rent expired during June is $2,000.
f. Unearned fees on June 30 are $1,875.
5. Journalize and post the adjusting entries.
6. Prepare an adjusted trial balance.
7. Prepare an income statement, a statement of owner’s equity, and a balance sheet.
8. Prepare and post the closing entries. (Income Summary is account #33 in the chart of accounts.) 
Indicate closed accounts by inserting a line in both the Balance columns opposite the closing entry.
9. Prepare a post-closing trial balance.

What type of molecule is gluten?

Does every cell in a living organism contain every gene? (excluding reproductive cells)

Yes
No

Does every gene get expressed (produce the corresponding protein) in every cell in living organisms? (excluding reproductive cells)

Yes
No

What functions do carbohydrates perform in living organisms?

What is fashion designing?

Pseudmonas bacteria

The increasing number of cybersecurity attacks by hackers with many different objectives requires companies of all sizes to implement a cybersecurity defense program. Such a program may include objectives to identify, protect, detect, respond and recover from threats. Assume that you are advising an organization that is implementing a cybersecurity defense program. What processes/systems/controls would you recommend for each of the objectives noted?

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In chapter 4 of The Great Transformation, Karl Polanyi shows how markets have largely been incidental to human economic organization until the end of feudalism and the recent advent of capitalism. Using the concepts of reciprocity, distribution, and householding (you should define and explain these three concepts), explain how until markets became important, the economy of a society was largely embedded within its social institutions.

Subject-civics

Writing Activity 14: "Square Peg" A Unicameral House

You'll have to do a little research for this assignment. Nebraska has a unicameral, or one-house, legislature. It is the only state of the union whose state government is non-bicameral. Write a 1 to 2 page report describing the history or development of the Nebraska unicameral government. Make sure you answer the question, "Why did Nebraska decide to have a unicameral government instead of a bicameral government?" Site all resources you use in your paper.  

diamonds germs and Stell 
Can someone tell me why using tradition to solve the distribution aspect of the economic problem (like reciprocity) faces limitations when society reaches a certain size and hence needs to be supplemented with other solutions.

A 297 kg sled travels at a speed of 8.2 m/s, how much kinetic energy does it have?

A boy pushes a box with a force of 75N. How far will the box travel if he does 400J of work

How to make money from notemaker