Which of the following are rivers of the central lowlands and great plains?

mississippi

missouri

st. lawrence

columbia

tennessee

hudson

ohio

erie

What type of government does costa rica have?

What is the hottest recorded temperature on earth

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.