Questions 13, 14 and 15 please help

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

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

Im so bad at fractions they are not my best math thing to work on