Please Complete the following 4 Exercises which account for Chapter 1 Activities
ID: 3843766 • Letter: P
Question
Please Complete the following 4 Exercises which account for Chapter 1 Activities
1.10 (Average speed in miles) Assume a runner runs 14 kilometers in 45 minutes and 30 seconds. Write a program that displays the average speed in miles per hour. (Note that 1 mile is 1.6 kilometers.) "1.11 (Population projection) The U.S. Census Bureau projects population based on the following assumptions: One birth every 7 seconds One death every 13 seconds One new immigrant every 45 seconds write a program to display the population for each of the next five years. Assume the current population is 312,032,486 and one year has 365 days. Hint: In Java, if two integers perform division, the result is an integer. The fractional part is truncated. For example, 5/4 is 1 (not 1.25) and 10/4 is 2 (not 2.5. To get an accurate result with the fractional part, one of the values involved in the division must be a number with a decimal point. For example, 5.0/4 is 1.25 and 10/4.0 is 2.5.Explanation / Answer
Hi, I hvae implemented 2 questions. Please repost other questions in separate post.
1.10)
public class AverageSpeed {
public static void main(String[] args) {
double distance = 14/1.6; // in miles
double time = (45*60)+30; // in seconds
double hour = time/3600.0; // number of hours
double speed = distance/hour; // miles/hours
System.out.println("Average speed : "+speed+" miles/hour");
}
}
/*
Sample run:
Average speed : 11.538461538461538 miles/hour
*/
1.4)
public class Exercise01_04 {
public static void main(String[] args) {
System.out.println("a a^2 a^3");
for(int i=1; i<=4; i++){
System.out.println(i+" "+(i*i)+" "+(i*i*i));
}
}
}
/*
Sample run:
a a^2 a^3
1 1 1
2 4 8
3 9 27
4 16 64
*/