Background We are going to estimate the population of the United States based on

Question

Background

We are going to estimate the population of the United States based on some information found at a website provided by the US census: http://www.census.gov/popclock/

That website specifies the following information:

How many years:0 New population in 0 years will change by 0 to be 307357870 How many years:1 New population in 1 years will change by 2980324 to be 310338194 How many years:10 New population in 10 years will change by 29803252 to be 337161122 How many years:100 New population in 100 years will change by 298032527 to be 605390397

Explanation / Answer

import java.util.*;

class Population

{

public static void main (String[] args)

{

long p =307357870;

long yearsecs = 60*60*24* 365;

double br= yearsecs/7.0;

double dr= yearsecs/13.0;

double ir= yearsecs/35.0;

double change = br-dr+ir;

Scanner s=new Scanner(System.in);

System.out.print("How many years:");

int y = s.nextInt();

long pnew = (long)(y*change);

System.out.println("Now population in "+y+" years will change by "+pnew+" to be "+(p+pnew));

}

}

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