An atom has 20 neutrons and 19 protons in its nucleus. How many electrons are in its outer (valence) electron shell? How many shells does it have? What is its atomic mass in g/mol? What is the element?

Credit Cards

Credit card numbers follow patterns.

1. Cards must have 13 - 16 digits (inclusive)
2. Card numbers must start with the number(s):
   • 4 for Visa cards
   • 5 for MasterCard cards
   • 37 for American Express cards
   • 6 for Discover cards

Given that a number has satisfied the above criteria A and B the following steps are taken to validate the number:

1. Double every second digit from right to left.  If doubling the digit results in a two-digit number, add the two digits to get a single digit number
2. Add all of the single digit numbers from step 1 above
3. Add all of the digits in the odd places from right to left in the card number
4. Sum the results from steps 2 and 3 above
5. If the result from step 4 is evenly divisible by 10 the card number is valid.

Given the number:

4388576018402626

The steps 1 - 5 above would be (after determining that A an B above have been satisfied):

Step 1:

2 * 2 = 4

2 * 2 = 4

4 * 2 = 8

1 * 2 = 2

6 * 2 = 12 ( 1 + 2 = 3)

5 * 2 = 10 (1 + 0 = 1)

8 * 2 = 16 (1 + 6 = 7)

4 * 2 = 8

Step 2:

4 + 4 + 8 + 2 + 3 + 1 + 7 + 8 = 37

Step 3:

6 + 6 + 0 + 8 + 0 + 7 + 8 + 3 = 38

Step 4:

37 + 38 = 75

Step 5:

75 % 10

You are to write a program that will prompt the user to enter a card number.  You are then to determine if the number entered is valid or not.  You are then to print to the screen if the number entered is a valid credit card number or not.

Your are to complete this program using functions. You are to have a function main in which you will only call the functions you have developed.  The last line of your code is to be a call to main as below:

main()

Here are some valid numbers for testing purposes:

Done in Python Format please

removing neurotransmitters from synaptic cleft?
1.chemical substance
2.diffusion
3.ligand binding site
4.synaptic terminal repuke

what happen to a nerve once it respond to stimulus?
1.Na in the cell
2.Na out of cell
3.K out of her
4.K in the cell

neuron becomes hyperpolarized?
1. K in the cell
2.K out of cell
3.Na in cell
4.Na out if cell

sodium/ potassium exchange pump
1. Na out of cell and K in the cell
2. K and Na out of cell
3. Na into cell and K out of cell

action potential at end of axon result in?
1.release of neurotransmitters from axon
2.release ions from axon
3. generation of new action

establish emotion state?
1. limbic system
2.midbrain
3. pond
4.cerebellum

1) Describe fraud.

2) What are the three categories of fraud and list an example of each.

3) Describe the fraud triangle.

4) List the key requirements of the Sarbanes-Oxley Act (SOX) 5) List the components of the framework commonly used in corporations when analyzing their internal control systems:

1.

2.

3.

4.

5.

6) List the five common principles of Internal Control and give an explanation and example of each

1.

2.

3.

4.

5.

7) Name two reasons why internal control for cash is important.

1.

2.

8) What does the term “cleared the bank” mean?

9) What are the two basic reasons that a company’s cash records do not balance to the bank statement?

1.

2.

10) Define the following:

1. Bank errors

2. EFT

3. Service charges

4. NSF checks

5. Deposits in transit

A recent survey asked students to rate their stress-level during the first week of classes. Students responded on a scale from 1 to 8 wherein 1 was almost no stress and 8 being stressed to the max. Students responses to the survey are illustrated in the table below.  

.

.

Using the table information, answer the following:

How many students were surveyed?  

What is the mean stress rating?    Use 2 decimals in your answer.

What is the median stress rating?     Use 2 decimals in your answer.

What is the mode of this data set?      

What is the range of this data set?      

1. Create the following items in R. Show the R output provided by each object.

b The matrix     1 2 3 4 5 6 7 8 9 10 11 12     stored as object mat1.

c The matrix     1 5 9 2 6 10 3 7 11 4 8 12     stored as object mat2.

d A data frame datfr such that the vector 1 2 3 4 5 6 is in the first column, green green red blue yellow red is in the second column, and 4 7 2 8 2 10 is in the third column.

e A list objs consisting of the objects in parts a, b, c, and d, in that order.

Write a program that acts as a basic calculator

• Assume the starting result is 0
• Ask the user for the operation to be performed
  • 0 – Exit
  • 1 – Add
  • 2 – Subtract
  • 3 – Multiply
  • 4 – Divide (Assume input will not be 0)
• Keep on performing the operation and showing the result until the user inputs the ‘0’ (exit) operation.
• You need to have everything written as functions
  • E.g. - You should only have the options listed once in the code
• You should have 4 different functions for each operation.
  • Any 2 of these functions should not return anything but instead use parameter passing by reference/pointers.
  • The other 2 functions should pass the parameter by value and have return statements (make sure to have a way to restrict the users to not make any changes to the original result variable).
• Your main function should be just the following lines

please use #include studio not ios.stream

int main(int argc, char* argv[])

{

    calculator();

    return 0;

}

/* Sample run of the program - Input and Output */

0 - Exit

1 - Add

2 - Subtract

3 - Multiply

4 - Divide

Please select an option : 1

Please enter the value : 5

Result = 5.000000

0 - Exit

1 - Add

2 - Subtract

3 - Multiply

4 - Divide

Please select an option : 2

Please enter the value : 1

Result = 4.000000

0 - Exit

1 - Add

2 - Subtract

3 - Multiply

4 - Divide

Please select an option : 3

Please enter the value : 3

Result = 12.000000

0 - Exit

1 - Add

2 - Subtract

3 - Multiply

4 - Divide

Please select an option : 4

Please enter the value : 2

Result = 6.000000

0 - Exit

1 - Add

2 - Subtract

3 - Multiply

4 - Divide

Please select an option : 0

1. A researcher is interested in studying the effect that the amount of fat in the diet and amount of exercise has on the mental acuity of middle-aged women. The researcher used three different treatment levels for the diet and two levels for the exercise. The results of the acuity test for the subjects in the different treatment levels are shown below.

Solve the the process scheduling problem using the round robin FCFS algorithm studied in assignment 7. The program will show the order of execution of the processing and will provide the average waiting time for the following scenarios:

a) Time quantum =1

b) Time Quantum=3

Use the table below to draw the Gantt Chart (Spread sheet or by hand).

2. Consider the same computer system used in problem 1. The following trace of accessed page numbers was recorded over time: 1, 0, 2, 2, 1, 7, 6, 7, 0, 1, 2, 0, 3, 0, 4, 5, 1, 5, 2, 4, 5, 6, 7, 6, 7, 2, 4, 2, 7, 3, 3, 2, 3. The first two page references were reads, while the third was a write, and every third reference after that was also a write operation.

c) Assuming that the clock replacement policy is used in combination with a modify bit for write operations, show how the contents of the four memory frames change over the sequence of page references. Compute the hit rate assuming that all frames are initially empty