Why did the US decide to help Japan after bombing them?

Which statement best explains how the invention of corporations contributed to the economy in the 1800's

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

Which of the following elements is not typical of an advanced society? a. cities b. science c. industries d. and nomadic lifestyle