Help now now the other 2 are Wednesday and Thursday

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.

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0