elizmcdnld

import java.util.Scanner;

public class ex4point2 {
	public static void main(String[] args) {
		
		Scanner userInput = new Scanner(System.in);
		
		System.out.println("Please enter the latitude and longitude (in degrees) of the first point.");
		double x1 = userInput.nextDouble();
		double y1 = userInput.nextDouble();

elizmcdnld

// Write a program that prompts the user to enter the distance to drive, the fuel 
// efficiency of the car in miles per gallon, and the price per gallon, and displays 
// the cost of the trip.

import java.util.Scanner;

public class ex2point23 {
	public static void main(String[] args) {
		
		Scanner userInput = new Scanner(System.in);

elizmcdnld

// If you know the balance and the annual percentage interest rate, you can compute 
// the interest on the next monthly payment using the following formula:
// interest=balance*(annualInterestRate/1200)
// Write a program that reads the balance and the annual percentage interest rate 
// and displays the interest for the next month.

import java.util.Scanner;

public class ex2point20 {
	public static void main(String[] args) {

elizmcdnld

//Write a program that reads the subtotal and the gratuity rate, then computes the 
//gratuity and total. For example, if the user enters 10 for subtotal and 15% for 
//gratuity rate, the program displays $1.5as gratuity and $11.5 as total.

import java.util.Scanner;

public class ex2point5 {
	public static void main(String[] args) {
		
		Scanner userInput = new Scanner(System.in);

elizmcdnld

// (Convert pounds into kilograms) Write a program that converts pounds into kilograms. 
// The program prompts the user to enter a number in pounds, converts it to kilograms, 
// and displays the result. One pound is 0.454 kilograms.

import java.util.Scanner;

public class ex2point4 {
	public static void main(String[] args) {
		
	Scanner userInput = new Scanner(System.in);

elizmcdnld

// Solve the following: 3.4x + 50.2y = 44.5
// 2.1x + 0.55y = 5.9
public class ex1point13 {
	public static void main(String[] args) {
		
		// Below numbers based on Cramer's formula as solved in notebook

		double a = 3.4;
        double b = 50.2;
        double c = 2.1;

elizmcdnld

public class ex1point11 {
	public static void main(String[] args) {
		
		int initialPopulation = 312032486;
		int yearlySeconds = 60 * 60 * 24 * 365;
		int yearlyBirths = yearlySeconds / 7;
		int yearlyDeaths = yearlySeconds / 13;
		int yearlyImmigrants = yearlySeconds / 45;
		int yearlyPopChange = yearlyBirths + yearlyImmigrants - yearlyDeaths;
		int popAfterOneYear = initialPopulation + yearlyPopChange;

elizmcdnld

public class ex1point10 {
	public static void main(String[] args) {
		System.out.println("Assume a runner runs 14 kilometers in 45 minutes and 30 seconds. What is the average speed in miles per hour?");
		System.out.println("1 mile = 1.6 kilometers. Therefore, 14 kilometers equals 8.699 miles.");
		System.out.println("60 minutes are in an hour. Therefore, 45.5 minutes is 0.7583 hours.");
		System.out.println("We can find the average by dividing 8.699 / 0.7583");
		System.out.println(8.699 / 0.7583);
		System.out.println("The runner progresses approximately 11.5 miles per hour.");
	}
}

elizmcdnld

// Write a program that displays the area and perimeter of a circle that has a radius 
//of 5.5

public class ex1point8 {
	public static void main(String[] args) {
		
		double radius;
		double area;
		
		radius = 20;

elizmcdnld

public class ex1point7 {
	public static void main(String[] args){
		System.out.println(4 * (1.0 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1.0/11)));
		System.out.println(4 * (1.0 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1/11) + (1.0/13)));
	}
}