Please show work for the following questions please. show work for each equation
ID: 3859809 • Letter: P
Question
Please show work for the following questions please. show work for each equation
1)
2)
Subject: Design of Database
Note:Please answer the following question with detailed solution to each problem
a. Find the blocking factor and total number of blocks needed for each of the four relations.Use a. Find the blocking factor and total number of blocks needed for each of the four relations. Use this information for the questions that follow. b. Calculate the following selection sizes, assuming uniform distribution of attribute values s (major-'Art',Student) s (rankProfessor", Faculty) s(grade = ‘A", Enroll) s(room= ‘A205,,Class) s (room A205*,ClasS)Explanation / Answer
/*
Calculate Circle Area using Java Example
This Calculate Circle Area using Java Example shows how to calculate
area of circle using it's radius.
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class CalculateCircleAreaExample {
public static void main(String[] args) {
int radius = 0;
System.out.println("Please enter radius of a circle");
try
{
//get the radius from console
BufferedReader br = newBufferedReader(new InputStreamReader(System.in));
radius =Integer.parseInt(br.readLine());
}
//if invalid value was entered
catch(NumberFormatException ne)
{
System.out.println("Invalid radius value" + ne);
System.exit(0);
}
catch(IOException ioe)
{
System.out.println("IO Error :" + ioe);
System.exit(0);
}
/*
* Area of a circle is
* pi * r * r
* where r is a radius of a circle.
*/
//NOTE : use Math.PI constant to get value of pi
double area = Math.PI * radius * radius;
System.out.println("Area of a circle is " +area);
}
}
/*
Output of Calculate Circle Area using Java Example would be
Please enter radius of a circle
19
Area of a circle is 1134.1149479459152
*/