If a=2, b=(√6), c=(√3)+1 find cosC​

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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.

Can someone answer this question for me