Please help me answer this question

In the diagram below, tan θ = sqrt 3. what is the value of m?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

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