Amauri Tapia

Our professor wants us to write some shell scripts for 2 problems that he assigned, but I have a little problem, I have no idea how to do it. So if someone can help me and explain how it works, that would be very helpful.

In the first problem, he wants us to write a script that shows the current directory you're in and to add up all the sizes of the files. In the end, the output should give the total size. I tried using the pwd command and adding extensions to it, but I got nothing.

The second problem, it asks to write a script that creates files in the directory above, one for each day of the week with the following format: YYMMDD.dat. Then the second part of this is to write another script that renames it by given it the day of the week. So for example if you have 150307.dat that would become SATURDAY.dat.

When I try to write the complete algorithm for this program, there are come couple of lines that I don't have right, and I don't know why.

Write a program that accepts user input from the console. The program should take a number and then test for the following age ranges: 0 to 10, 11 to 20, 21 to 30, 30 and over. Display a message in the Output window in the following format:

user_age + " is between 21 and 30"

If the user is 30 or over, you can just display the following message:

"You are 30 or over"

Exercise C:

Scanner user_input = new Scanner(System.in);

System.out.print("Enter your age: ");

int age = user_input.nextInt();

switch ( age ) {

case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8: case 9: case 10:

System.out.println( ____ + " is between 0 and 10");

break;

_____________________________________________________________________

System.out.println(age + " is between _____________");

break;

case 21: case 22: case 23: case 24: case 25: case 26: case 27: case 28: case 29: case 30:

System.out.println(age + "_________________");

break;

default:

System.out.println("_____________");

How is the algorithm for this program suppose to be?

Use a for loop to print out the odd numbers from 1 to 10. (For the easy way to do this exercise, think about the increment value of the loop, which is the third item between the round brackets.)

One of the hard ways to do the exercise above is by using an operator you haven't yet met - the modulus operator. Modulus is when you divide by a number and keep the remainder. So 10 Mod 3 is 1, because 10 divide by 3 is 3. The remainder is 1, and that's what you keep. The Modulus operator in Java is the percentage sign, rather confusingly. It's used like this:

int remainder;

int total = 10

remainder = total %3

So the number (or variable) you want to divide up goes first. You then type a percentage sign, followed by your divider number. The answer is the remainder.

int loopVal;

int end_value = ________;

int oddNum = 0;

for (loopVal = 1; loopVal < end_value; loopVal____) {

oddNum = ________;

if (oddNum __ ____) {

System.out.println("odd number = " + loopVal);

}

}

So my professor wants us to write a program for this...

Write a complete Java program that uses a for loop to compute the sum of the even numbers and the sum of the odd numbers between 1 and 25.

public class sumEvenOdd

{

public static void main(String[] args)

{

(1)……………… = 0;

int oddSum = 0;

//loop through the numbers

for(int i=1; i <= 25; i++)

{

if(i % 2 == 0)

{

//even number

evenSum += i;

}

else

{

(2)…………………………………..;

}

}

//Output the results

(3)…………………………………………;

System.out.println("Odd sum = " + oddSum);

}

}

for 1) I think that its "int evenSum =0)

2) " // oddnumber

oddSum +=i"

and for 3, I don't have a clue.

The question is...

An atom of beryllium (m = 8 units) splits into two helium (m=4 units) with the release of energy of 92.2 electron volts of energy. If the original beryllium atom is at rest, find the kinetic energies and speeds of the tow helium atoms.

I tried using the Law of Conservation of Momentum, but I don't know if that's what I should do.

I have to make an auto loan calculator, I created the basic code, but my professor want us to change the interest rate depending on the credit score of the buyer. I am not sure how to do it.

Here's what our professor asked us to do:

1. Amount of the loan (vehicle coast)

2. Down Payment

3. Number of months

4. New or Used Car

5. Annual interest rate, the interest rate is a function of the credit score of the buyer

a. credit score of 700-699 interest rate is 2%

b. credit score of 600-699 interest rate is 3%

c. credit score of 500-599 interest rate is 4%

d. credit score of 400-499 interest rate is 5%

e. credit score less than 400 interest rate is 10%

6. If the car is a new car than 0.5% will be added to the interest rate

And here is my code.

Thanks for the help.

Public Class Form1

'Class Level Constants

Const dblMONTHS_YEAR As Double = 12 'Months Per Year

Const dblNEW_RATE As Double = 0.05 'IR, New Car

Const dblUSED_RATE As Double = 0.08 'IR, Used Car

'Class Varible to hol the annual interest rate

Dim dblAnnualRate As Double = dblNEW_RATE

Private Sub btnCalculate_Click(sender As Object, e As EventArgs) Handles btnCalculate.Click

Dim dblVehicleCost As Double 'Cost

Dim dblDownPayment As Double 'Down Payment

Dim intMonths As Integer '# of months for the loan

Dim dblLoan As Double 'Amount of loan

Dim dblMonthlyPayment As Double 'Monthly Payment

Dim dblInterest As Double 'Interest Paid for the period

Dim dblPrincipal As Double 'Principle paid for the period

Dim intCount As Integer 'Counter for the loop

Dim strOut As String ' Used to hold a line of output

Dim blnInputOk As Boolean = True

'Get the vehicle cost, validating at the same time.-

If Not Double.TryParse(txtCost.Text, dblDownPayment) Then

lblMessage.Text = "Vehicle cost must be a number."

blnInputOk = False

End If

'Get the down payment, validating the same time.

If Not Integer.TryParse(txtMonths.Text, intMonths) Then

lblMessage.Text = "Months must be an integer."

blnInputOk = False

End If

If blnInputOk = True Then

'Calculate the loan amount and monthly payment

dblLoan = dblVehicleCost - dblDownPayment

dblMonthlyPayment = Pmt(dblAnnualRate / dblMONTHS_YEAR, intMonths, -dblLoan)

End If

'Clear the list box and message label.

ListBox1.Items.Clear()

lblMessage.Text = String.Empty

For intCount = 1 To intMonths

'Calculate the interes rate for this period.

dblInterest = IPmt(dblAnnualRate / dblMONTHS_YEAR, intCount, intMonths, -dblLoan)

'Calculate the principal for this Period.

dblPrincipal = PPmt(dblAnnualRate / dblMONTHS_YEAR, intCount, intMonths, -dblLoan)

'Start Building the output string with the month.

strOut = "Month" & intCount.ToString("d2")

'Add the payment amount to the output string.

strOut &= ":payment =" & dblMonthlyPayment.ToString("n2")

'Add the interest amount to the output string.

strOut &= ", interest =" & dblInterest.ToString("n2")

'Add the principal for the period.

strOut &= ", principal =" & dblPrincipal.ToString("n2")

'Add the output string to the list box

ListBox1.Items.Add(strOut)

Next

End Sub

Private Sub btnClear_Click(sender As Object, e As EventArgs) Handles btnClear.Click

radNew.Checked = True

dblAnnualRate = dblNEW_RATE

lblAnnualRate.Text = dblNEW_RATE.ToString("p")

txtCost.Clear()

txtDownPayment.Clear()

txtMonths.Clear()

ListBox1.Items.Clear()

lblMessage.Text = String.Empty

txtCost.Focus()

End Sub

Private Sub btnExit_Click(sender As Object, e As EventArgs) Handles btnExit.Click

Me.Close()

End Sub

Private Sub radNew_CheckedChanged(sender As Object, e As EventArgs) Handles radNew.CheckedChanged

If radNew.Checked = True Then

dblAnnualRate = dblNEW_RATE

lblAnnualRate.Text = dblNEW_RATE.ToString("p")

ListBox1.Items.Clear()

End If

End Sub

Private Sub radUsed_CheckedChanged(sender As Object, e As EventArgs) Handles radUsed.CheckedChanged

If radUsed.Checked = True Then

dblAnnualRate = dblNEW_RATE

lblAnnualRate.Text = dblUSED_RATE.ToString("p")

ListBox1.Items.Clear()

End If

End Sub

End Class

Our professor for my programming class wants us to do a project, but I am stuck. The project is a wage calculator that calculates Federal Tax, State Tax, Net Pay and Gross Pay. The following is what he wants.

Modify Tutorial 4-8 pages 254 to do the following calculations

1. Hourly paycheck calculation per week

i) Pay rate#1 $10 per Hour M-F Up to 40 Hours

ii) Pay rate#2 $14 per Hour M-F for each additional hour (over the 40 and up to 50 Hours)

iii) Pay rate#3 $16 per Hour M-F for each additional hour (over the 50 Hours)

iv) Pay rate#4 $20 per Hour Saturday and Sunday only and number of total hours cannot exceed 10 hours.

For the paycheck calculation per week you need to add/modify the following labels

Hours worked M-F this will cover i+ii+iii

Hours worked S-SU this will cover iv

2. Tax Calculations

i. Federal Tax – 12% up to $300 gross pay and any amount more than $300 the Federal will be at 10%.

ii. State Tax – 20% up to $320 gross pay and any amount more than $320 the State will be at 15%.

You need to display the gross pay and the net pay

And this my code:

Public Class Form1

Private Sub btnCalculate_Click() Handles btnCalculate.Click

' Declare variables

Dim decPayRate As Decimal ' Hourly Pay Rate

Dim decGrossPay As Decimal ' Total Gross Pay

Dim decFederalTax As Decimal 'Federal Tax

Dim intWeekdays As Integer 'Hours worked on Weekdays

Dim intWeekendHours As Integer 'Hours Worked On Weekend

Dim decNetPay As Decimal 'Net Pay

Dim decStateTax As Decimal 'State Tax

Dim decGrossPay2 As Decimal 'Gross Pay for Weekdays

Dim decGrossPay3 As Decimal 'Gross pay for weekends

lblStatus.Text = String.Empty

If intWeekdays >= 1 And intWeekdays <= 40 Then

decPayRate = 10

decGrossPay2 = intWeekdays * decPayRate

ElseIf intWeekdays <= 41 And intWeekdays > 50 Then

decPayRate = 14

decGrossPay2 = (intWeekdays - 40) * decPayRate

End If

If intWeekdays >= 41 And intWeekdays >= 50 Then

decPayRate = 14

decGrossPay2 = intWeekdays * decPayRate

ElseIf intWeekdays <= 50 Then

decPayRate = 16

decGrossPay2 = (intWeekdays - 40) * decPayRate

End If

If decGrossPay >= 300 Then

decFederalTax = CDec(0.12)

ElseIf decGrossPay <= 300 Then

decFederalTax = CDec(0.1)

End If

If intWeekendHours <= 10 Then

decPayRate = 20

decGrossPay3 = (intWeekendHours - 10) * decPayRate

End If

'Calculate gross pay

decGrossPay = decGrossPay2 + decGrossPay3

'Display gross pay

If Integer.TryParse(txtWeekdays.Text, intWeekdays) Then

lblGrossPay.Text = decGrossPay.ToString("c")

End If

'Calculate Net Pay

decNetPay = (decGrossPay) - (decFederalTax + decStateTax)

'Display Net Pay

lblNetPay.Text = decNetPay.ToString("c")

'Calculate Federal Tax

decFederalTax = decGrossPay * decFederalTax

'Display Federal Tax

lblFederalTax.Text = decFederalTax.ToString("c")

'Calculate State Tax

decStateTax = decGrossPay * decStateTax

'Display State Tax

lblStateTax.Text = decStateTax.ToString("c")

'Calculate Gross Pay 2

decGrossPay2 = decPayRate * intWeekdays

'Calculate Gross Pay 3

decGrossPay3 = decPayRate * intWeekendHours

End Sub

With that code, the calculator gives me the same result for different hours worked.

If would be great if someone could help me.

I forgot how to get the domain and how use interval notation.

The function is:

F(x)= (x-1)/ (x^3-x+1)

(x + x^-1) ^ 3

Suppose that the function p=-(1/3)+60 relates the selling price p of an item to the number of x units that are sold. Assume p is in dollars. For which value of x will be the corresponding revenue be maximum? What is the maximum revenue and at what price?

How do you find all the real zeros of x^4-4x^2-21?

I have a 2000 BMW 328i. And well it has the stock 16 in rims, but I want to buy new ones because I don't like them. I can't find answer to what's the largest size I put on it. So does any one know what's the largest size that would fit?

Well this has been my childhood dream since the second grade. Now that I'm going to college, I want to pursue it. I plan to get a B.S in aerospace engineering after I get one in physics/astronomy and mathematics which are my greatest passions along with being an astronaut. So what are the requirements both physical and academic to become one?

So my math teacher went over the most famous numbers in the world.

0

1

Pi

e

i

He later showed us an equation where all those numbers equal zero, but I can't remember it, does some know it? I think it's e^(pi+i)+1=0.

So I'm looking into buying a telescope, I'm an amateur when it comes to choosing one as I have never bought one, but I have always been interested in astronomy ans since I am going to college, I would like a recommendation of a good telescope mostly as for a hobby, but also just in case I may need it for a project.

I got 2 copies of the Winged Dragon of Ra and I made up a deck with a lot of extra cards that I had, but I don't think it's that efficient and want some advice.

Monsters: (21)

Morphtronic Staplen

Old Vindictive Magician

Sangan

Ancient Crimson Ape

Majestic Mech- Goryu

Mei-Kou, Master of Barriers

The Rock Spirit

Skull Kraken x2

Gogogo Golem x2

Marshmallon x2

Battle Fader x2

Goblindbergh x2

Spirit Reaper x2

Winged Dragon of Ra x2

Spells: (10)

Dark Hole

Heavy Storm

Monster Reborn

Soul Exchange x3

Mystical Space Typhoon x2

Magical Mallet x2

Traps: (11)

Mirror Force

Metal Reflect Slime

Scrap-Iron Scarecrow

Sakuretsu Armor

Bottomless Trap Hole x2

Dark Bribe x2

Aegis of Gaia x3