2 tens 3 tenths 1 thousandth 20.31

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

Amayoral candidate would like to know her residents’ views on a tax on sugar drinks before the mayoral debates. she asks one thousand registered voters from both parties. these voters are an example of a census population convenience sample simple random sample

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )