4. To make telephone numbers easier to remember, some companies

use letters to show their telephone number. For example, using letters,

the telephone number 438-5626 can be shown as GET LOAN. In some

cases, to make a telephone number meaningful, companies might use

more than seven letters. For example, 225-5466 can be displayed as

CALL HOME, which uses eight letters. Write a program that prompts the

user to enter a telephone number expressed in letters and outputs the

corresponding telephone number in digits. If the user enters more than

seven letters, then process only the first seven letters. Also output the

– (hyphen) after the third digit. Allow the user to use both uppercase

and lowercase letters as well as spaces between words. Moreover, your

program should process as many telephone numbers as the user wants.

5

8.

Write a program that uses while loops to perform the following steps:

a. Prompt the user to input two integers: firstNum and secondNum

(firstNum must be less than secondNum).

b. Output all odd numbers between firstNum and secondNum.

c. Output the sum of all even numbers between firstNum and

secondNum.

d. Output the numbers and their squares between 1 and 10.

Copyright 2018 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. WCN 02-200-208

342 Chapter 5: Control Structures || (Repetition)

e. Output the sum of the square of the odd numbers between

firstNum and secondNum.

f. Output all uppercase letters.

The population of town A is less than the population of town B. How-

ever, the population of town A is growing faster than the population

of town B. Write a program that prompts the user to enter the popu-

lation and growth rate of each town. The program outputs after how

many years the population of town A will be greater than or equal to

the population of town B and the populations of both the towns at that

time. (A sample input is: Population of town A = 5,000, growth rate

of town A = 4%, population of town B = 8,000, and growth rate of

town B = 2%.)

20. When you borrow money to buy a house, a car, or for some other pur-

pose, you repay the loan by making periodic payments over a certain

period of time. Of course, the lending company will charge interest on

the loan. Every periodic payment consists of the interest on the loan

and the payment toward the principal amount. To be specific, suppose

that you borrow $1,000 at an interest rate of 7.2% per year and the

payments are monthly. Suppose that your monthly payment is $25.

Now, the interest is 7.2% per year and the payments are monthly, so

the interest rate per month is 7.2/12 = 0.6%. The first month’s interest

on $1,000 is 1000 X 0.006 = 6. Because the payment is $25 and the

interest for the first month is $6, the payment toward the principal

amount is 25 – 6 = 19. This means after making the first payment,

the loan amount is 1,000 – 19 = 981. For the second payment, the

interest is calculated on $981. So the interest for the second month

is 981 X 0.006 = 5.886, that is, approximately $5.89. This implies that

the payment toward the principal is 25 – 5.89 = 19.11 and the remain-

ing balance after the second payment is 981 – 19.11 = 961.89. This

process is repeated until the loan is paid. Write a program that accepts

as input the loan amount, the interest rate per year, and the monthly

payment. (Enter the interest rate as a percentage. For example, if the

interest rate is 7.2% per year, then enter 7.2.) The program then out-

puts the number of months it would take to repay the loan. (Note that

if the monthly payment is less than the first month’s interest, then after

each payment, the loan amount will increase. In this case, the program

must warn the borrower that the monthly payment is too low, and

with this monthly payment, the loan amount could not be repaid.)

(Apartment problem) A real estate office handles, say, 50 apartment

units. When the rent is, say, $600 per month, all the units are occupied.

However, for each, say, $40 increase in rent, one unit becomes vacant.

Moreover, each occupied unit requires an average of $27 per month for

maintenance. How many units should be rented to maximize the profit?

Write a program that prompts the user to enter:

The total number of units.

b. The rent to occupy all the units.

The increase in rent that results in a vacant unit.

d. Amount to maintain a rented unit.

The program then outputs the number of units to be rented to maxi-

mize the profit.

a.

c.

Purchase answer to see full

attachment

#### Why Choose Us

- 100% non-plagiarized Papers
- 24/7 /365 Service Available
- Affordable Prices
- Any Paper, Urgency, and Subject
- Will complete your papers in 6 hours
- On-time Delivery
- Money-back and Privacy guarantees
- Unlimited Amendments upon request
- Satisfaction guarantee

#### How it Works

- Click on the “Place Order” tab at the top menu or “Order Now” icon at the bottom and a new page will appear with an order form to be filled.
- Fill in your paper’s requirements in the "
**PAPER DETAILS**" section. - Fill in your paper’s academic level, deadline, and the required number of pages from the drop-down menus.
- Click “
**CREATE ACCOUNT & SIGN IN**” to enter your registration details and get an account with us for record-keeping and then, click on “PROCEED TO CHECKOUT” at the bottom of the page. - From there, the payment sections will show, follow the guided payment process and your order will be available for our writing team to work on it.