Could someone please help me with this??

In the surface area formula for cylinders which expressionrepresents the lateral area

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.

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?