Maria is working on a database that stores client invoice data. She needs to design a query that will display the average balance of all invoices. She should use the ________ function in Expression Builder on the column containing invoice amounts

Gesture recognition allows users with touch screens to control the computer with gestures instead of mouse clicks

Indicate whether the statement is true or false

A class that has at least one abstract method is called an:

(a) concrete class (b) encapsulated class (c) abstract class (d) private class