The Han, Roman and Gupta empires all fell do to invasion. A strong, loyal army is necessary to protect the empire from invasion. All of these empires were first weakened by a succession weak governments. The trust and faith in the government was eroded over time. Internal strife by the people because of declining abilities of the government to govern weaken the state. The government should try to prevent internal rebellions by maintaining good governance over the people.
Salem Massachusetts. (Salem Witch Trials)
I = Prt
I: interest earned
P: principle (initial invested amount)
r: rate (percentage)
t: time in years (duration)
Most often, when letters are side-by-side this means they are all factors of each other. If something is a factor of another, then multiply them. So, 275 times 8% or 8/100 or 0.08 times 16 years is equal to $352. With this total subtract $275 from $352. The interest earned is equal to $77.
$275 * 0.08 * 16 yrs = $352
$352 - $275 = $77
I = $77
This may seem confusing when saying aloud in order of the equation, "Interest equals $352". The total is $352, the interest earned is equal to $77. Conventions and platitudes are often erroneous.
Native Americans had no immunity to European illnesses and their population was devastated by the (sometimes deliberate) introduction of diseases like smallpox. Over time, most surviving tribes were forcibly relocated from their traditional lands to make way for expanding European settlements.
So no