The length of a rectangle is 7 feet longer than it is wide. if each side is increased 7 feet, then the area is multiplied by 2. what was the size of the original rectangle?

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