Your grandmother tells you a dollar doesn't go as far as it used to. she says the "purchasing power" of a dollar is much less than it used to be. explain what she means. try to use and explain terms like inflation and deflation in your answer.

Identify the example of when situation and time are key to assessing risk of harm in a research study: a study on the efficacy of a behavioral intervention for smoking cessation involves both adults and teenagersasking women if they have had an abortionresearch on the prevalence of hiv-infected individuals in communitiesa survey about sexually transmitted diseases