Are any numbers between 5.2 and 5.5 irrational

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

Is it greater than or less than7*3_9*2

What function has a range {yly< 5}? question on picture above^