Answer:
<em>The focus is the place inside Earth's crust where an earthquake originates. The point on the Earth's surface directly above the focus is the epicenter.</em>
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<span>Using the formula 1/2*b*h for the area of a triangle, we get 7.8 cm^2 as the area of the base. Now let us assume that the three faces of the pyramid are of the same dimensions. So by subtracting 7.8 from the total surface area and dividing by 3, we get a face area of 29.6 cm^2. We get a height of 19.73 cm (using a "base" of 3 cm). Using half of the face of the pyramid (a right triangle) and applying some trigonometry (19.73 cm/sin 60) we get 22.78 cm as the slant height of the pyramid.</span>
<u>Answer:</u>
<em>C) Population Density Equation </em>
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<u>Explanation:</u>
Population density is the total population that has been divided by the total area of the land. "Demography" is the "statistical study" of populations. It includes the study of size, structure, and distribution of the population. There are both direct and indirect methods for the data collection. Direct data is vital that tracks all the births and deaths and also include the changes in the legal status such as marriage, divorce, and migration. On the other hand the "indirect method" is vastly dependent on the historical demography.
<h2>Explanation:</h2><h3>C. The Rocky Mountains</h3>
