Given: abcd is a trapezoid with median ef. prove: ef∥ab and ef∥dc and ef=0.5(ab+dc)

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

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.