Suppose that you are in charge of organizing the music for a school dance. You survey five of your friends about the kinds of music they like. a) Did you use a census or a sample? b) Will your decisions based on this survey be biased? Why or why not? Answer both a) and b) in the space below

Answer this question only if you know the answer! 30 points and

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet