What produced a lot of wealth for Spain in the mid 1800s?

In 4/4 time, two eighth notes are equal to: a.one half of one beat. b.one beat. c.one sixteenth of one beat. d.two beats.

In a publicly held corporation, - o stockholders rarely trade their stocks o stocks are not usually traded at stock exchanges o a large number of stockholders can buy and sell stock o family members are excluded from holding stock

According to the aztec history, how did the aztecs know where to build their new city of tenochtitlan? why was this a good location?