Explain how scientists conclude the ages and distances of stars by observing their electromagnetic energy ?

do you have a list of sources to choose from?

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

explanation:

id do!

19th amendment granted women the right to vote. the 19th amendment guarantees all american women the right to vote.