Using the graph as a reference, how could you describe the U. S. economy in the late 1920s?

Bad, and at an all time low.

Explanation:

Because of the wall street market crashing severely, and stock prices plummeting. The national economy in general was also affected immensely due to the massive amounts of people becoming unemployed, and the GDP crashing.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

the roman empire began to fall