From February 1, 1917, until the end of the war, a period of about 21 months, German U-boats sank almost 3000 Allied and neutral ships. This was an average of ships a month. (Round your answer.)

143 ships a month

Explanation:

3000 / 21 = 142.857

This then rounds to 143

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)

b. the passage of the equal rights amendment  

explanation:

this mean that anything that someone else could do they could do