Let X be a non-degenerate ordered set with the order topology. A
non-degenerate set is a set with more than one
element.
Show the following:
(1) every open interval is open, (2) every closed interval is
closed, (3) every open
ray is open, and (4) every closed ray is closed.
Please note: Its a topology question.
In: Advanced Math
You're entering records into a database, and you realize you don't have the information for one of the fields. What do you do?
Use letters in alphabetical order to select options
In the Field Properties section, change the Required field to Blank so users can skip the field during data entry.
Unless a field's set up to require an entry, you can skip the fields for which you don't have any data.
In order for a user to leave a field blank, you'd have to set its data type to Optional so that data entry personnel can skip it.
Access doesn't allow blank fields, so you have to wait until you have all the fields' data before you can enter that record.
2
Which data type would you use for a field that will contain phone numbers?
Use letters in alphabetical order to select options
Number.
Hyperlink.
Short Text.
AutoNumber.
3
On which Ribbon tab will you find tools for starting a new table?
Use letters in alphabetical order to select options
The Database Tools tab contains the Create Table button.
The Create tab contains the Table and Table Design buttons.
The Design tab contains the Design Table button.
The File tab contains the New Table command.
4
What are the benefits of using validation rules?
Use letters in alphabetical order to select options
They reduce typos, create a consistent look for reports, and make searching easier.
They make data entry go faster by inserting a value automatically into the field, and they make it easier to set up reports that must include a lot of information on a single sheet of paper.
They eliminate duplicate entries in records that must remain unique, and they speed up the data entry process.
They prevent duplicate values in more than one field in the table, which makes it easier for Access to sort your records.
5
How do you control the way Access stores and displays a date in a table field?
Use letters in alphabetical order to select options
Type MMDDYYYY into the Validation Rule row under Field Properties.
Use the Format setting under Field Properties, and choose a format from the drop-down menu.
Type Short or Long, the two date format options, into the Format row under Field Properties.
Type Short Date in the Field Size setting under Field Properties.
6
When you're ready to go back to work on a database you used earlier in the day, what's the quickest way to find and reopen it?
Use letters in alphabetical order to select options
Click the File tab, and click the Open command to display your most recently used database files.
Click the Home tab, click the View button's drop-down menu, and choose View Recent Files.
Click the Open button on the Quick Access Toolbar.
Click the File tab and see the file listed in the menu, or click Recent to display a list of recently used databases.
7
Which data types can you apply to the primary key in your Access tables?
Use letters in alphabetical order to select options
Primary key fields can use AutoNumber or Text data types, but they can't use Memo data types.
Any data type other than Memo is acceptable for a primary key.
The default is AutoNumber, but any data type that allows a user to enter unique data into that field is acceptable.
All primary keys use the AutoNumber data type because it's the only one that allows unique data entry.
8
How do you display your tables' fields so you can establish relationships between tables in your database?
Use letters in alphabetical order to select options
On the Database Tools tab, click the Object Dependencies button to display a list of all the table fields in your database.
On the Create tab, click the Relationships button. From there, you can select the tables in your database from the drop menu and view their fields.
On the Database Tools tab, click the Relationships button, and use the resulting Show Table dialog box to display a field list box for each table in your database.
Open all your tables in datasheet view, and use your mouse to drag the field names from one table to another.
9
What's the easiest way to rename a field?
Use letters in alphabetical order to select options
Open the table in design view, click the current name in the Field Name column, and edit it there.
The only field you can rename is the default ID field by adding text in front of the letters "ID" to customize the primary key.
In the Table Tools tab, click the Insert Rows button, enter the desired field name into the new row, and then use the Delete Row button to remove the one with the incorrect name.
You can't rename fields once you've created them. All you can do is delete them and create a new field with the name you wanted to use.
10
When you work with a form, as many as five arrow buttons may appear near the bottom left corner of your form. Which of these buttons can you always use to go to the last record in your table?
Use letters in alphabetical order to select options
The second button, which looks like a left arrow.
The fourth button, which looks like a right arrow pointing to a vertical line.
The first button, which looks like a left arrow pointing at a line.
The third button, which looks like a right arrow.
In: Computer Science
Please assist with the following:
The Philadelphia Phillies defeated the Tampa Bay Rays 4 to 3 to win the 2008 major league baseball World Series (The Philadelphia Inquirer, October 29, 2008). Earlier in the major league baseball playoffs, the Philadelphia Phillies defeated the Los Angeles Dodgers to win the National League Championship, while the Tampa Bay Rays defeated the Boston Red Sox to win the American League Championship. The file MLBSalaries contains the salaries for the 28 players on each of these four teams (USA Today Salary Database, October 2008). The data, shown in thousands of dollars, have been ordered from the highest salary to the lowest salary for each team.
Analyze the salaries for the World Champion Philadelphia Phillies. What is the total payroll for the team? What is the median salary? What is the five-number summary?
Were there salary outliers for the Philadelphia Phillies? If so, how many and what were the salary amounts?
What is the total payroll for each of the other three teams? Develop the five-number summary for each team and identify any outliers.
Show the box plots of the salaries for all four teams. What are your interpretations? Of these four teams, does it appear that the team with the higher salaries won the league championships and the World Series?
MLB Salaries:
| Player | Phillies | Dodgers | Rays | Red Sox |
| 1 | 14250 | 19000 | 6000 | 14000 |
| 2 | 10000 | 15730 | 5375 | 13000 |
| 3 | 8583 | 15217 | 3898 | 12500 |
| 4 | 8000 | 14727 | 3785 | 10442 |
| 5 | 7958 | 10000 | 2875 | 10167 |
| 6 | 7786 | 9517 | 2750 | 9250 |
| 7 | 6350 | 9250 | 2400 | 8333 |
| 8 | 6000 | 9000 | 2300 | 8000 |
| 9 | 5500 | 8000 | 2250 | 6000 |
| 10 | 5000 | 7500 | 1600 | 5083 |
| 11 | 3250 | 7433 | 1275 | 4000 |
| 12 | 3000 | 2000 | 1000 | 3850 |
| 13 | 2400 | 1925 | 800 | 3000 |
| 14 | 1700 | 1115 | 417 | 3000 |
| 15 | 900 | 600 | 413 | 2000 |
| 16 | 900 | 500 | 412 | 1275 |
| 17 | 600 | 454 | 412 | 840 |
| 18 | 500 | 425 | 405 | 835 |
| 19 | 480 | 415 | 401 | 800 |
| 20 | 445 | 411 | 401 | 775 |
| 21 | 440 | 406 | 400 | 457 |
| 22 | 425 | 400 | 398 | 422 |
| 23 | 420 | 393 | 397 | 421 |
| 24 | 415 | 393 | 396 | 406 |
| 25 | 395 | 392 | 396 | 405 |
| 26 | 393 | 390 | 396 | 403 |
| 27 | 390 | 390 | 392 | 400 |
| 28 | 390 | 390 | 390 | 396 |
In: Economics
Read the article "Are Emily and Greg More Employable than Lakisha and Jamal? A field Experiment on Labor Market Discrimination" by M. Bertrand and S. Mullainathan. Write a one page summary of the article stating its main question, empirical strategy used (explain why they chose to use it) and main conclusions. Also add a paragraph with your assessment of the article (for example, do you find weaknesses? what are the main strengths?
In: Economics
A compound containing only C, H and O was subjected to combustion analysis. A sample of 9.550×10-2 g produced 1.825×10-1 g of CO2 and 1.120×10-1 g of H2O. Determine the empirical formula of the compound and enter the appropriate subscript after each element.
If the molar mass of the compound is 184.276 g/mol, determine
the molecular formula of the compound and enter the appropriate
subscript after each element.
In: Chemistry
1. Amylose is a "polysaccharide" that plants use to store energy. It is made of repeating subunits of C6H10O5.
a. A particular amylose molecule has 2113 of these subunits, what is its molecular formula? Express your answer as a chemical formula.
b. What is its molar mass? Express your answer to four significant figures and include the appropriate units.
c. What is the empirical formula for amylose? Express your answer as a chemical formula.
In: Chemistry
An organic compound contains C, H, N, and O. Combustion of 0.3069 g of the compound produces 0.8301 g CO2 and 0.2975 g H2O. A sample of 0.5322 g of the compound was analyzed for nitrogen. At STP, 30.54 mL of dry N2 (g) was obtained. In a third experiment, the density of the compound as a gas was found to be 3.68 g/L at 143 deg C and 244 torr. Calculate the empirical formula and the molecular formula of the compound.
In: Chemistry
An organic compound contains C, H, N, and O. Combustion of 0.3069 g of the compound produces 0.8301 g CO2 and 0.2975 g H2O. A sample of 0.5322 g of the compound was analyzed for nitrogen. At STP, 30.54 mL of dry N2 (g) was obtained. In a third experiment, the density of the compound as a gas was found to be 3.68 g/L at 143 deg C and 244 torr. Calculate the empirical formula and the molecular formula of the compound.
In: Chemistry
The structure of the physicians service market has resulted in the development of the supplier-induced demand hypothesis to explain conduct in the market. In at least a 250 word posting, discuss the theoretical and empirical issues surrounding the supplier-induced demand hypothesis. After reading the postings of other students select the one that you found most interesting to respond to. Your response should be at least 75 words and include why you found this posting interesting.
In: Economics
The Acme Company manufactures widgets. The distribution of widget weights is approximately normal with a mean of 53 ounces and a standard deviation of 10 ounces. Use the Empirical Rule to answer the questions below. Sketch the distribution in order to answer these questions. (a) 99.7% of the widget weights lie between and (b) What percentage of the widget weights lie between 43 and 83 ounces? % (c) What percentage of the widget weights lie below 73 ? %
In: Statistics and Probability