P is the principal; that's the amount you start with. The r is the interest rate. This is a decimal; in other words, if the interest rate is 9%, we use .09 in the equation. The n is the number of times the interest compounds each year. Finally, t is the time in years of the deposit or borrowed money.
Juan needs to create a questionnaire that adequately measures secondary traumatic stress so that his research study is valid. Secondary traumatic stress is the content domain in Juan's study. Content domain is the body of knowledge, skills or abilities being measured or examined by a test, experiment or research study.
Content-Based Regulation: A regulation of speech or expression that is based on the substance of the message being communicated, rather than just the manner or method in which the message being expressed. Content-Neutral Restriction: A restriction on the manner in which an expression can be communicated or conveyed.