Bob measured the density of a sample of Beryllium three times 1.69g/cm3, 1.88g/cm3, and 1.87g/cm3 the accepted value is 1.85g/cm3 the percent error of Bob’s average measurement is

6(2x+y)+2(x+4y) how can i solve this

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.

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.