Answer:
C. 1500 people per event
Explanation:
The probability of the asteroid hitting earth is one in 21,000.
Mathematically, that can be represented as 
.
assuming the impact could cause a death of 30,000,000.
The average death rate for this kind of event if it occurs can be got by multiplying the probability of the event occurring by the death rate.
= × 30,000 = 1,428.57
≈ 1500 people per event.<em> (an approximate answer was required by the question)</em>
This means that, approximately 1500 people will be killed if the event were to occur once.
<span>The optimal incident command structure would be the unified command structure. This structure implements an Incident Command System (ICS) that can be used across the board into different districts and regions. This would be the most efficient way to follow through after a disaster of this type.</span>
Because they were fade of the “black fear“
Answer:
Montezuma II, also spelled Moctezuma, (born 1466—died c. June 30, 1520, Tenochtitlán, within modern Mexico City), ninth Aztec emperor of Mexico, famous for his dramatic confrontation with the Spanish conquistador Hernán Cortés.
Cross sectional studies is the correct answer.
Cross-sectional research is used to examine participants' behaviors of different ages at one point in time. These studies are useful for a variety of reasons: data collection can be proceeded rapidly, the cost is a lot lower than a logitudinal research since there is no need to keep contact and follow-up with participants as time passes, and because of that practice effects are not a problem. On the other hand, the principal limitation of this research is that the results produce information regarding age-related change, instead of development per se.
