What property is shown in 3a x 9c = 27ac

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

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

This question is hard for me to answer can you me. the question is find the value of x.