In an american history essay can i write dates in numbers or do i have to write in in words

Which amendment prohibits federal and state courts and federal administrative agencies from hearing cases in which a private party names a state as a defendant without the state's consent?

Concerns of the spanish treatment of what nation lead to the spanish american war

Monopolies were legal in the united states until a)the 1860s. b)the 1870s. c)the 1880s. d)the 1890s.