What was the connection between the gadsden purchase and the southern railroad route?

The Gadsden Purchase was a transaction that followed the conquest of much of northern Mexico by the United States. Its relationship to the transcontinental railroad is that  it was purchased because it was the most practical route  for the transcontinental railroad.  The purchase was negotiated by the U.S. minister to Mexico, James Gadsden.

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.

they made rome the dominant power in the mediterranean.