A motorboat goes downstream in a river and covers the distance between the coastal towns and 5 hours it covers a distance of stream in 6 hours if the speed of the stream is 2 km per hour find the speed of the boat in still water

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