Homework Answers

Write an application for a lawn-mowing service. The lawn-mowing season lasts 20 weeks. The weekly fee for mowing a lot under 4,000 square feet is R25. The fee for a lot that is 4,000 square feet or more, but under 6,000 square feet, is R35 per week. The fee for a lot that is 6,000 square feet or over is R50 per week. Prompt the user for the length and width of a lawn USING JOPTIONPANE, and then display the weekly mowing fee USING JOPTIONPANE , as well as the 20-week seasonal fee. Save the file as Lawn.java

1. The use of class and object

2. The use of JOption for input

3. The use of JOption for output

4. correct out

Write an application for a furniture company; the program determines the price of a table. Ask the user to choose 1 for pine, 2 for oak, or 3 for mahogany. The output is the name of the wood chosen as well as the price of the table. Pine tables cost R 100, oak tables cost R 225, and mahogany tables cost R 310. If the user enters an invalid wood code, set the price to 0 and allow the user to select an option up to 3 times . Save the file as Furniture.java.

Marks allocation 

1. Presentation of a menu

_{Select an option} 

_{1. for pine} 

_{2. for oak}

_{3. for mahogany}

2. use of a loop

3. Use of an if statement/ switch

4. correct output

Add two polynomials
Given two polynomials A and B, write a program that adds the given two polynomials A and B.
Input

The first line contains a single integer M. 
Next M lines contain two integers Pi, Ci separated with space, where Pi denotes power and Ci denotes co-efficient of Pi for polynomial A.
After that next line contains a single integer N.
Next N lines contain two integers Pj, Cj separated with space, where Pj denotes power and Cj denotes co-efficient of Pj for polynomial B.
Output

Explanation

If M = 4 and for polynomial A
For power 0, co-efficient is 5
For power 1, co-efficient is 0
For power 2, co-efficient is 10
For power 3, co-efficient is 6.

If N = 3 and for polynomial B
For power 0, co-efficient is 1
For power 1, co-efficient is 2
For power 2, co-efficient is 4.
Then polynomial A represents "6x^3 + 10x^2 + 5", the polynomial B represents "4x^2 + 2x + 1" and the addition of A and B is "6x^3 + 14x^2 + 2x + 6"

print 0 if degree of polynomial is 0