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Solve for x i'll try to attach the files bc it's not letting me for some reason

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample