What is one of the major roles of the supreme court plays in a federal judiciary

Which of the following statements is true about germany's use of u-boats?

Political rights for women grew most rapidly on the western frontier primarily because (1) the settlers were influenced by native american indian societies (2) women greatly outnumbered men in the west (3) pioneer life often required men and women to share responsibilities equally (4) immigrants settling in the west brought ideals of gender equality from europe

What was the overall impact of eli whitneys introduction of interchangeable parts?