# Chapter 7

### Exercises

1. Expanding on problem 1 from chapter 6, implement your algorithm. The problem description is restated below.
Write a script called “quadroots” to solve the real roots of a quadratic equation: Your algorithm should ask the user for the coefficients. To calculate the roots of the equation, your algorithm should calculate the discriminant D given by: If D > 0, the algorithm displays a message: “The equation has two roots” and then displays the roots.
If D = 0, the algorithm displays a message: “The equation has one root”, and then displays the root.
If D < 0, the algorithm displays a message: “The equation has no real roots”.
2. Expanding on problem 2 from chapter 6, implement your algorithm. The problem description is restated below.
Write a program that calculates the cost of a car rental according to the following price schedule:

Type of Car    Class B Rental Period 1-6 days 7-27 days 28-60 days \$27 per day \$162 for 7 days,+\$25 for each additional day \$662 for 28 days,+\$23 for each additional day \$34 per day \$204 for 7 days,+\$31 for each additional day \$810 for 28 days,+\$28 for each additional day Class D cannot be rented for less than 7 days \$276 for 7 days,+\$43 for each additional dayx \$1,136 for 28 days+\$38 for each additional day

The program asks the user to enter the rental period and type of car. The program then displays the appropriate cost. If a period longer than 60 days is entered, a message “Rental is not available for more than 60 days” is displayed. If a rental period of less than 6 days is entered for Class D, a message “Class D cars cannot be rented for less than 6 days” is displayed.

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