$$ n[A] = 7 , n[B] = 4, n[A \cap B] = 2, n[A \cup B] = ? $$
$$ n[A \cup B] = n[A] + n[B] - [A \cap B] $$ $$ n[A \cup B] = 7 + 4 - 2$$ $$ n[A \cup B] = 9 $$
What is a half-life in terms of nuclear chemistry?
The half-life of a compound or element is defined as the length of time it takes for a given amount of that compound to radioactively decay to half of that original amount.
Provide a brief description of the APA Ethics Code.
The APA Ethics Code is a set of principles and regulations that are followed by everyone in psychological professions. The purpose of this code is to ensure ethical treatment of clients, data, and the professionals. Such codes include standards on maintaining confidentiality, properly encrypting and disposing of data, and carefully handling situations in which the professional serves in multiple roles with a given client.