Emily parked on level -4 and she got on the elevator went up 15 floors and got off. What solve and write the integer??

Which one is true about the hexagons ?

Is the square root of 4 plus the square root of 16 rational?

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.