Explain how two floods that each having a recurrence interval of 100 years ( probability of .01 of occurring in one given year) can occur in the same river basin three years apart?

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.

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)

What factors britain to become an industrial and commercial power?