What was Langston Hughes view of America in his poem “I, Too, Sing, America”

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal

Who was the last of the "good empire" a: commodus c: marcus aurelius b: trajan d: julius caesar

Which sentence best compares the employment opportunities between farms and cities in the late 1800s