The Dunn family has moved from the United States to Germany . Which of the following family members is demonstrating cross-cultural communication skills? OA. Saul, who believes that everyone in the world should speak English

OB. Lana , who stays in the house as much as possible because she does not speak German

O C. Aure, who uses hand motions and tries to speak a little German while he plays with the neighborhood children

O D. All of the above .

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Which statement is best described as a atom

Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.