Write a class named gastank containing:
an instance variable named amount of type double, initialized to 0.
a method named addgas that accepts a parameter of type double.
the value of the amount instance variable is increased by the value of the parameter.
a method named usegas that accepts a parameter of type double.
the value of the amount instance variable is decreased by the value of the parameter.
a method named getgaslevel that accepts no parameters.
getgaslevel returns the value of the amount instance variable.

Me with this program in c++ ! computers represent color by combining sub-colors red, green, and blue (rgb). each sub-color's value can range from 0 to 255. thus (255, 0, 0) is bright red. (130, 0, 130) is a medium purple. (0, 0, 0) is black, (255, 255, 255) is white, and (40, 40, 40) is a dark gray. (130, 50, 130) is a faded purple, due to the (50, 50, 50) gray part. (in other word, equal amounts of red, green, blue yield gray).given values for red, green, and blue, remove the gray part. ex: if the input is 130 50 130, the output is: 80 0 80. thus, find the smallest value, and then subtract it from all three values, thus removing the gray.

If you want to import a picture into a dtp application, what must you do first? draw an image frame. import text. open the folder containing the file. select get image… from the windows menu.

Column a of irma’s spreadsheet contains titles for each row, but her document is too big and will be printed three pages across. she wants to be sure that every page will be understood. what can irma do to with this problem?