Which one is greatest to least going all the way down

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5