Train a leaves westtown and travels at 50 mph toward smithville, 330 miles away. at the same time, train b leaves smithville and travels at 60 mph toward westtown. after how many hours do the two trains meet

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample