M is directly proportional to R cubed R = 4, M = 160 find M when R = 2

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

What is the the greatest common factor ?

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