Please write a JAVA program which reads a number n from the user and check whether n is a perfect number or not. For example, when n = 7, the print out should be 7 is not a perfect number. If the input n is 6, then the program prints out 6 = 1 * 2 * 3

Show what is written by the following segment of code, given item1, item2, and item3 are int variable:

item1 = 4;

item3= 0;

item2 = item1 + 1;

stack.Push(item2);

stack.Push(item2 +1);

stack.Push(item1);

item2 = stack.Top();

stack.Pop();

item1 = item2 + 1;

stack.Push(item1);

Stack.Push(item3);

while (!stack.IsEmpty())

{

     item3 = stack.Top():

     cout <<item3<<endl;

     stack.Pop();

}

cout<<item1 <<endl <<item2<<endl<<item3<<endl;

The Monty Hall problem solved on Matlab. Please show code. You are given a choice between three doors. Behind one door is a new car and behind the other two doors is a goat. You first pick one of the doors at random. Then, a door with a goat is opened for you. You are then given the option to switch your door to the other unopened door. Should you do this? What are your odds of winning if you switch vs not switching? Show using matlab with a large number of runs, where you keep your selection 50% of the time and switch 50% of the time.

Given a generic array with ‘n’ items (not only integers). Give a solution for checking whether there are any duplicate elements in the array or not? You just need to return a boolean (true or false). State the complexity of your solution. Can you come up with another solution that has O(n logn) complexity? Explain.

Write a program to simulate an experiment flipping three coins. Each time the three coins are flipped, is called a “trial”. A coin flip can randomly result in either “Heads” (1) or “Tails” (0) Allow the user to enter the number of “trial”s to simulate. Print out each coins’ result after each “trial”. Use seed value 1234. Tally up and determine what percentage of “trial”’s all three coins land on “Heads” in the simulation. C language

In MATLAB write a function secant.m to apply the secant method.

function [x,i] = secant(f, x0, x1, tol, maxiters)

[x,i] = secant(f, x0, x1, tol, maxiters) performs the secant method with f(x), starting at x_0 = x0 and x_1 = x1, and continuing until either |x_i+1 - x_i| <= tol, or maxiters iterations have been taken. The number of iterations, i, is also returned. An error is raised if the first input is not a function handle. A warning is raised if the maximum number of iterations is reached without achieving the tolerance.

Test the function on the problem f(x) = 0.9 cos(x) - sqrt(x) = 0, with starting values x0 = 0 and x1 - 1, and a tolerance of 10^-8 and maxiters of 20.

Write a C function to calculate and return the factorial value of any positive integer as an
argument. Then call this function from main() and print the results for the following input
values:
2, 3,4, 5, 10, 15
What is the maximum value of an integer for which factorial can be calculated correctly on a
machine using your algorithm?

In c++

This question is relevant if you implemented a polynomial that included some calculus-based operations such as derivative and integral. Write a new function that meets the following specification:

double slope(const polynomial& p, double x)

// POSTCONDITION: The return value is equal to the slope of the

// polynomial p, evaluated at the point x.

import java.util.Scanner;

public class Grade {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);

// Reading score from user
System.out.println("Enter the student's score:");
double score = scnr.nextDouble();

System.out.print("Grade:");
// Checking if score is less than 60
if(score<60){
System.out.println("F");
}
// Checking if score is less than 70
else if(score<70){
System.out.println("D");
}
// Checking if score is less than 80
else if(score<80){
System.out.println("C");
}
// Checking if score is less than 90
else if(score<90){
System.out.println("B");
}
// Checking if score is less than 100
else {
System.out.println("A");
}
}
}

I need this codes output to say

Enter the student's score:

A

and mine says

Enter the student's score:

Grade: A

How do I fix that in my code?

Java program

Bounds checking

Make an array {4, 6, 2, 88, 5}, ask the user what number they would like to change. If their pick is out of bounds, tell them. Otherwise ask them what they would like to change the number to. After the change, display all the numbers with a for loop

1. Using SQL, answer the following question referring to the table below
   1. How many twins are there? (Just having the same birthday does not make you twins.)
2. 2. Name the twins.

CREATE TABLE IF NOT EXISTS students (

student_id INT NOT NULL AUTO_INCREMENT,

first_name VARCHAR(16),

last_name VARCHAR(24),

birthday DATE,

street_address VARCHAR(128),

city VARCHAR(32),

PRIMARY KEY (student_id));

INSERT INTO students

(first_name, last_name, birthday, street_address, city) VALUES

('John','Jones','2000-12-17','250 Pines Blvd.','Pembroke Pines'),

('Mark','Bacon','2000-04-12','1270 Walnut St.','Prarie Bluff'),

('Bill','Carlson','1999-07-06','250 Pines Blvd.','Pembroke Pines'),

('Jean','Carlson','1999-07-06','250 Pines Blvd.','Pembroke Pines'),

('Leonard','Cook','2000-09-14','8046 Maple St.','Highland Park'),

('William','Markham','1999-07-06','1600 Sylvan Ln.','Lake Forest'),

('Sam','Cook','1998-10-13','8046 Maple St.','Highland Park'),

('Fred','Williams','1999-07-08','722 Oack Knoll','Arlington'),

('Sally','Fillmore','2000-03-25','1215 Carrington St.','Decatur'),

('Mary','Jones','1999-11-13','1940 Grant St.','Denver'),

('Phyllis','Jones','1999-11-13','1940 Grant St.','Denver');

Create a class Client. Your Client class should include the following attributes:

Company Name (string)

Company id (string)

Billing address (string)

Billing city (string)

Billing state (string)

Write a constructor to initialize the above Employee attributes.

Create another class HourlyClient that inherits from the Client class.   HourClient must use the inherited parent class variables and add in hourlyRate and hoursBilled. Your Hourly Client class should contain a constructor that calls the constructor from the Client class to initialize the common instance variables but also initializes the hourlyRate and hoursBilled. Add a billing method to HourlyClient to calculate the amount due from a service provided. Note that billing amount is hourlyRate * hoursBilled

Create a test class that prompts the user for the information for five hourly clients, creates an arraylist of 5 hourly client objects, display the attributes and billing for each of the five hourly clients. Display the company name and billing amount for each company and the total billing amount for all five companies.

Remember to submit your pseudocode algorithm

can u give me an example of how to removing Double Linked List a node at a given location in java

the method should be like this:

public void removeFromLocation(int location) {

}
      
      
      
      
   }

Problem Statement

Josephus attended a party where they had a rather strange raffle. Everyone was to stand in a circle, and every M^th person was to be eliminated until only one person was remaining, who won the lawnmower.

Write the function Josephus, which takes as parameters a vector<string> representing the N guests at the party in the order they line up for the raffle, and the integer M, giving which person will be eliminated at each turn. Your function should return a string giving the name of the winner of the raffle (the last person standing).

Hint: While there is a mathematical solution, a queue will be much more straightforward.

Constraints

• N, the length of the vector<string> guests, will be greater than 0 and less than 2,000.
• M will be greater than zero and less than 2,000.

Examples

1. guests = {"Josephus", "Titus", "Simon", "Eleazar"}
   M = 3 
   Returns: "Josephus"

   Counting every third person from Josephus (remember, they are in a circle), Simon is eliminated first. Skipping Eleazar and Josephus, Titus goes next. Skipping Eleazar and Josephus, we come back to Eleazar. Josephus, who cleverly suggested M = 3, comes out the winner!

2. guests = {"Bradford", "Rosette", "Ji", "Ashleigh", "Avery", "Lavonna", "Fredericka"} 
   M = 2 
   Returns: "Fredericka"

3. guests = {"Tiffany", "Randy", "Kit", "Sharlene", "Marquerite", "Debra", "Pok", "Tanisha", "Claudio"} 
   M = 17 
   Result: "Debra"

Given Function

string Josephus(vector<string> guests, int M) {
// your code here
}

Use the given function to solve the problem statement. Please follow the given notes and constraints. Please code this problem in C++.

Python Programming, Below included the Skeleton, input and output. Could you also include indents in the solutions.

In this programming laboratory you will create a Python program that evaluates the sum of the following mathematical series:

Sum = x⁰ / 0! + x¹ / 1! + x² / 2! + x³ / 3! + … + xⁿ / n!                 

The variable x is a real (float) number and the variable n is an integer that can assume values greater than or equal to 0. You program is to consist of a main program that allows the user to input values of x and n and then executes a loop with an index going from 1 to n. Your program should also include two functions, factorial and power, that calculate (respectively) factorial values and numbers to a power. The main program should call the factorial and power functions, from within the loop, to evaluate the expression for relevant values and add the value of the current term to the running sum. You may use the factorial function that was introduced in the examples in this week’s module (included in the skeleton of the program). You will need to write your own power function. The power function should compute x to the 0 power or x to positive integer powers. Do not worry about negative powers of x.

# Function to compute x to the k power

def power(x,k):

You will need to complete this function here

If x is 0 then return 0

Otherwise if n is 0 return 1

Otherwise use a loop to multiply x times itself n times and return the product

# The function below is the factorial function used in the Week Six examples

def factorial(num):

      if num < 0:

            print('Number must be >= 0')

            exit()

      else:

            fac = 1

            while num >= 1:

                 fac = fac * num

                 num = num - 1

            return fac

# Main program

sum = 0.0

x = input("Enter x value ")

x = float(x)

n = input("Enter n value ")

n = int(n)

if n < 0:

    print("n must be < 0")

    quit()

…

You will need to complete your main program here. It will
need to include a while loop that goes from 0 to n and calls to the factorial and power functions.

After the loop, you will need to print the sum value

Your program should produce the results shown below when executed. Multiple executions with different x and n values are displayed.

Enter x value 2

Enter n value 0

Sum is 1.0

Enter x value 2

Enter n value 1

Sum is 3.0

Enter x value 2

Enter n value 2

Sum is 5.0

Enter x value 2

Enter n value 3

Sum is 6.333333333333333