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Tasya [4]
3 years ago
7

A pyramid has a square base that is 160 m on each side. what is the perimeter in kilometers

Mathematics
2 answers:
Otrada [13]3 years ago
7 0

Keywords:

<em>perimeter, square, base, pyramid, kilometers, side </em>

For this case we must find the perimeter of the base of a square pyramid, whose side of the square measures 160m. In addition, the measure obtained must be converted to kilometers. So, we have by definition the perimeter of a square is the sum of its sides, which is equivalent to P = 4l, where "l" is the side of the square.

Ifl = 160m, then:

P = 4 * 160m\\P = 640m

Thus, the perimeter of the base of the pyramid is 640m.

On the other hand, by definition: 1Km = 1000m

By making a rule of three we have:

1Km ---------> 1000m

x --------------> 640m

Where "x" represents the perimeter of the base of the pyramid in Km.

x = \frac {640 * 1} {1000}\\x = 0.64km

Thus, the perimeter of the base of the pyramid is 0.64Km

Answer:

The perimeter in kilometers is 0.64

11Alexandr11 [23.1K]3 years ago
3 0
<span>1km=1000m 160m=0.160x4=0.64

</span>
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Answer:

1. B

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Step-by-step explanation:

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The study claimed that subjects who suffer depression are more likely to have a heart attack than those who are not depressed.

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1.

An observational study is one where the researcher only determines the variables he wants to study without controlling or influencing any factor of the population of interest. Because there is no interference from the researchers, there is a high risk that confounding factors may affect the conclusions of it. These studies are usually precursors to experimental tests, it allows the researcher to have an idea of the association between the two variables but you cannot establish causal relationships from them.

This is an example of an observational study, the researcher merely recorded the variables of interest without interfering with any aspects that may influence them. (For example diet or exercise habits of the subjects)

2. and 3.

The objective of the study is to determine if "depression" causes "disposition to heart attacks"

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4.

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I hope it helps!

4 0
3 years ago
How much is 80% from 250.00
rodikova [14]
If you need further help on how they got the answer, this equation will take more time, but it will also help you understand these types of problems. Part÷Whole=Percent÷100
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