I tried to enter the idea of a hairy stem, which the plant has. None of the sites allowed that sort of entry but rather asked for a description of the hair. The hair isn't on the leaves, just the stems.
If it is not ragweed, it is golden rod. There are 100 species of golden rod! No, it is not golden rod, although it could be Canadian golden rod. Most species of golden rod are without hair on their stems.