The Rectangle class is provided in the template. First run the program to see what it does. You will need two numbers for input. (1) Add a calculatePerimeter() method to the class (Rectangle. java). calculatePerimeter() has no parameters and returns the perimeter of the rectangle.
(2) In main() in RectangleDemo. java, call the new method and display the results:
Ex:
Enter a length: 7
Enter a width: 5
The area of a 7 by 5 rectangle is 35
The perimeter is 24

Our primary purpouse as electricians is to do wich of the following core concepts? a: install electrical components in a way they can be upgraded b: install electrical equiptment in a way that reduces heat c: install electrical systems in a safe manner d: only b and c

Avariable of the data type arrays is storing 10 quantities. what is true about these quantities? a. the quantities all have different characteristics. b. the quantities all have the same characteristics. c. five quantities have the same and five have different characteristics. d. it is necessary for all quantities to be integers. e. it is necessary for all quantities to be characters.

When early motion pictures played in movie theaters, they were often accompanied by live organ or piano music. which of the following are the most likely reasons that this happened? (select all that apply). the music was provided to distract audience members from the loud sounds made when filmstrips were changed. the music accompanied the movies because the movies were silent and audiences were used to hearing music during plays in theaters. the music usually was played before, and sometimes after the movie, as an alternative form of entertainment. the music viewers to interpret the dramatic action in the films.