What is 9 + 10 ( I swear to god)

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

W-16=-12 solve each one step equation plz

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