Someone help please I really need this extra credit I will give brainleast

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?