The ability to speak write and read english
The correct answer to this open question is the following.
Unfortunately, you forgot to include teh quote. Without the quote, we do not know its content. Just you.
You do not provide any context, excerpt, article, or references.
The only thing we can do to help you is to comment on the following.
Although you forgot to attach the quote, we are going to assume that you refer to a piece of advertisement found in newspapers in the times of the California Golden Rush. If that is teh case, then the impact I think these advertisements had on people living in the East was that it made people from the East Coast of the United States decide to move to the Pacific West, California, in specific, to go there and try to get rich.
Let's have in mind that in the 1840s, the territory of California was a faraway place from the East Coast. When John Marshall discovered gold in Sutter's Mill, California, the news spread fast and many people wanted to get rich. The so-called "gold fever" had begun. This represented the beginning of the vast migration identified as the California gold rush migration. Historians believe that approximately 250,000 or more arrived in California in search of the "gold dream."
Could be historical interpretation! Sounds like that is the most likely answer!
The number of terms n is 7.
<u>Explanation:</u>
Given that:
First term a=21
nth term 
=39
Sum up to n terms 
=210
To Find:
The number of terms n in the arithmetic progression.
Formula to be used:
Sum up to n terms Sn is given by the expression
Solution:
Number of terms n in the given series is n=7
