△abc is a right triangle with right angle at ∠b .

ab=42 cm
bc=34 cm

what is the measure of ∠a , to the nearest degree?
enter your answer in the box.

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.

Which of the following is an example of conditional probability

Which rule describes the composition of transformations that maps △abc to △a”b”c