Flying against the wind, a jet travels 3400 miles in 4 hours. Flying with the wind, the same jet travels 5650 miles in 5 hours. What is the rate of the jet in still air and what is the rate of the wind?

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