Hi can someone help me with the first one? I need a clear explanation on what to put in the number lines, and what 20 percent is converted into!

In a nonexperimental method, relationships between variables are studied by making observations or measures of the variables of interest.

Research without either the manipulation of an independent variable, the random assignment of individuals to conditions or orders of conditions, or both, is referred to as non-experimental research.

The non-experimental study is entirely dependent on variables that the researcher has no control over. By whatever means, they cannot manipulate, control, or change the subjects. Thus, all they can do is continue their research while monitoring and interpreting their subjects.

It is safe to assume that a non-experimental research design is used when there is no specific cause-effect study problem and the researcher simply wants to grasp a topic in depth without constraining it with variables. They examine the natural phenomena as they take place.

Therefore, in a nonexperimental method, relationships between variables are studied by observing or measuring the variables of interest.

To learn more about non-experimental research, visit: https://brainly.com/question/28039772?referrer=searchResults

#SPJ4

Answer:

Step-by-step explanation:

Let the number be x then:.

According to the question:

6 * (x + 25) = 30

therefore,

x + 25 = 30 / 6

x + 25 = 5

x = 5 - 25 = -20

Answer:

5

Step-by-step explanation:

4

The volume of a sphere with a radius of 7 cm (or diameter of 12 cm) is 904.32 cubic centimeters.

To find the volume of a sphere with a radius of 7 cm, we can use the formula:

V = (4/3) * π * r^3

where V represents the volume and r represents the radius. However, you mentioned that the diameter of the sphere is 12 cm, so we need to adjust the radius accordingly.

The diameter of a sphere is twice the radius, so the radius of this sphere is 12 cm / 2 = 6 cm. Now we can calculate the volume using the formula:

V = (4/3) * π * (6 cm)^3

V = (4/3) * 3.14 * (6 cm)^3

V = (4/3) * 3.14 * 216 cm^3

V = 904.32 cm^3

For more such questions on volume

https://brainly.com/question/463363

#SPJ8

In mutually exclusive data, you cannot find any overlap or intersection between the categories or events being analyzed.

This means that the occurrence of one event or category precludes the occurrence of the other. On the other hand, in dependent data, the occurrence of one event or category may have an effect on the occurrence of the other, and thus, they are not completely independent or separate. Therefore, in both cases, you cannot find any shared or common outcomes or occurrences between the categories or events being analyzed.

You cannot find a direct correlation or causal relationship between mutually exclusive or dependent data. In mutually exclusive events, the occurrence of one event prevents the occurrence of the other, meaning they cannot happen at the same time. In dependent events, the probability of one event happening is influenced by the outcome of a previous event. Due to these characteristics, it is not possible to establish a direct correlation or causal relationship between such events.

Learn more about mutually exclusive here:

https://brainly.com/question/24812166

#SPJ11

The function in this problem fails to exist for x = 7, hence option C is the correct option in the context of the problem.

The function in this problem is defined as follows:

f(x) = 6/(x - 7).

For a fraction, we have that the denominator must assume a value different of zero, hence the value of x at which the function is not defined is given as follows:

x - 7 = 0

x = 7.

Hence option C is the correct option for this problem.

More can be learned about functions at https://brainly.com/question/1415456

#SPJ1

Londell needs to deliver newspapers for 24 weeks to have enough money to buy the bicycle.

Londell currently has $40 saved, and he needs a total of $400 to buy the bicycle. Each week, he earns $15 delivering newspapers.

To calculate the number of weeks Londell needs to work, we can set up an equation:

$40 (current savings) + $15 (weekly earnings) × (number of weeks) = $400 (total cost of the bicycle)

Simplifying the equation:

$40 + $15 = $400

Subtracting $40 from both sides of the equation:

$15 = $400 - $40

$15 = $360

Dividing both sides of the equation by $15:

= $360 / $15

≈ 24

Therefore, Londell will have to deliver newspapers for approximately 24 weeks to have enough money to buy the bicycle.

To know more about the solving equations, refer here:

https://brainly.com/question/14410653#

#SPJ11

Answer:

x=4

Step-by-step explanation: take (possative)3x and add it to -5x. -2x+9=1. subtract 9 from 1. -2x=-8. devide bolth sides by -2. a negative devided by  a negative makes a possative soit equallls x=4

Answer:

i would go with B

Step-by-step explanation:

I'm not too sure I'm so sorry but thats my closest guess

Answer:

4 lawns

Step-by-step explanation:

$145=$65+N*$20

where N= no. of lawns he needs to now

$80=$20N

N=4

Answer:

NO

Step-by-step explanation:

First, we should simplify both fractions to the most simple form.

4/14=2/7

12/40=6/20=3/10

A proportion means that it is equal. 2/7 does not equal 3/10, so the answer is no.

Answer:

1. Distribute

2. Combine like terms

3. Get all variable on one side and everything else on the other (Inverse operations: Add / subtract)

4. Solve for one of your variables (inverse operation: Multiple / Division

5. Simplify

Answer:

10,000

Step-by-step explanation:

I think it is the right answer

Answer:

60,000

Step-by-step explanation:

Answer:

3 - x/12

Step-by-step explanation:

follow the steps in the sentence

a) The metallographic microscope is an optical microscope specifically designed for the examination of metallic materials. It works by utilizing a combination of bright field and dark field illumination techniques to observe the microstructure of a metal sample.

To begin, a thin slice of the metal sample is prepared and mounted on a glass slide. The sample is then polished to remove any surface irregularities and to create a smooth, flat surface. Next, the sample is etched with a suitable chemical reagent to reveal the microstructure.

When observing the sample under the metallographic microscope, a beam of light is directed through the objective lens, which focuses the light onto the sample. The light interacts with the various microstructural features of the metal, such as grain boundaries, phases, and inclusions.

The bright field illumination technique is commonly used, where the light is directly transmitted through the sample and collected by the objective lens. This provides a clear, detailed image of the microstructure.


b) The transmission electron microscope (TEM) is a powerful tool used to study the internal structure of materials at the atomic and subatomic level. Unlike conventional optical microscopes, the TEM uses a beam of electrons instead of light to illuminate the sample.

The working principle of a TEM involves several key components. First, an electron gun generates a beam of electrons, which is accelerated towards the sample by an electric field. The electrons pass through a series of electromagnetic lenses that focus and shape the beam.

Next, the sample is prepared as a thin section, typically around 100 nanometers thick, to allow the electrons to pass through. The thin section is mounted on a grid and placed in the TEM chamber.

When the electron beam interacts with the sample, various phenomena occur. Some electrons are transmitted through the sample, forming an image on a fluorescent screen or a digital detector. These transmitted electrons provide information about the atomic structure and composition of the sample.


c) Micrographs of different types of iron and steel alloys can reveal important information about their microstructures. Here are brief explanations of the micrographs you mentioned:

- Hypoeutectoid steel: Micrograph of hypoeutectoid steel would show a matrix of ferrite with dispersed regions of pearlite. Ferrite is a soft phase, while pearlite is a eutectoid mixture of ferrite and cementite.

- Hypereutectoid steel: In the micrograph of hypereutectoid steel, the primary microstructure would consist of a matrix of cementite with dispersed regions of pearlite. Cementite is a hard and brittle phase.

- White iron: Micrograph of white iron would reveal a predominantly cementite matrix with little to no ferrite or pearlite present. White iron is a hard and brittle material commonly used in applications requiring high wear resistance.

- Gray iron: In the micrograph of gray iron, the matrix would consist of graphite flakes embedded in a ferrite or pearlite matrix. The presence of graphite gives gray iron its unique gray appearance and improved machinability.


d) Etching reagents for copper alloys are chemical solutions used to selectively reveal the microstructure of copper-based materials. Different etching reagents can highlight different microstructural features. Here are a few commonly used etching reagents for copper alloys:

- Ferric chloride: Ferric chloride is a widely used etching reagent for copper alloys. It selectively etches the matrix phase, such as alpha-phase copper, while leaving other phases relatively unaffected. This allows for the clear visualization of grain boundaries and other microstructural features.

- Ammonium persulfate: Ammonium persulfate is another commonly used etchant for copper alloys. It preferentially attacks the alpha-phase copper, revealing the distribution and morphology of other phases, such as precipitates or second phases.

- Nitric acid: Nitric acid can be used as an etching reagent for copper alloys to selectively dissolve certain phases or constituents. It is often used to highlight grain boundaries and other features by attacking the surrounding matrix.

- Cupric chloride: Cupric chloride is used as an etchant for copper alloys to reveal specific microstructural features, such as intermetallic compounds or grain boundaries. It provides good contrast and enables detailed examination of the microstructure.

Know more about   microscope here:

https://brainly.com/question/29726640

#SPJ11

Answer:

Continuous

Step-by-step explanation:

Degrees don't always have to be integers. It can be 32.3 degrees, 32.31 degrees, etc.

Answer:

-23

Step-by-step explanation:

Substitute the value of the variable into the expression and simplify.

Answer:

Four-tenths

Step-by-step explanation:

Four-tenths

Hope it helps you in your learning process.

Answer:

66r+77   |    -14k+9

Step-by-step explanation:

i gotchu big daddy

Answer:

6:6=x

7:16=y

8:20=z

Step-by-step explanation:

For 6, since BD is a perpendicuar bisector, that means 15x=90. Divide 90 by 15 and you get 6

for 7, if bd is a angle bisector, you can set 3y=48. divide 48 by 3 and you get 16

for 8, since Bd is a median, you can set 2z-3=z+17. Isolate the variable and you will get 2z-z=17+3. Add like terms together and you get z=20

Just so you know, a perpendicular bisector will make both angles equal to 90, an angle bisector make both angles equal to each other, and medians make it so that it hit a line in the center therefor you can set both sides of the line to be equal

Answer:

259.5

Step-by-step explanation:

8.1*12=97.2
Area of trapiezium = 1/2(b+a)h
(2.8+8.1)=10.9
10.9*3/2=16.35
16.35*2=32.7
2.8*12=33.6
33.6+32.7+97.2=163.5
4*12*2=96
163.5+96=259.5

The correct option is none of the above.

The rational expression given is t⁴/32.

The rational expression simplifies to t⁴/2⁵ or t⁴/32. The restriction on the variable t is t ≠ 0.

Therefore, the correct option is none of the above, since none of the given options include the valid simplified expression or the proper restriction on the variable.

To know more about rational expression visit:

https://brainly.in/question/55118844

#SPJ11

We should multiply the expression by (9+√14) fraction.

Multiplication is the mathematical operation that is used to determine the product of two or more numbers.

To rationalize the terms, we multiply both the denominator and denominator by the conjugate of the denominator.

The denominator is 9-√14 and its conjugate is; (9+√14).

(5-√7)/(9-√14) = (5-√7)(9+√14)/(9-√14)(9+√14)

                       =  (5-√7)(9+√14)/(9²-14)

                      = (45 + 5√14 - 9√7 - √98)/(81-14)

                       =  (45 + 5√14 - 9√7 - √98)/67

                       = (45 + 5√14 - 9√7 - 7√2)67

This is the rationalized expression.  

The denominator is (9-√14) and its conjugate is (9+√14).

Learn more about multiplications;

https://brainly.com/question/14059007

#SPJ7

False. if you are given a graph with two shif table lines, the correct answer will always require you to move both lines.

In a graph with two shiftable lines, the correct answer may or may not require moving both lines. It depends on the specific scenario and the desired outcome or conditions that need to be met.

When working with shiftable lines, shifting refers to changing the position of the lines on the graph by adjusting their slope or intercept. The purpose of shifting the lines is often to satisfy certain criteria or align them with specific points or patterns on the graph.

In some cases, achieving the desired outcome may only require shifting one of the lines. This can happen when one line already aligns with the desired points or pattern, and the other line can remain fixed. Moving both lines may not be necessary or could result in an undesired configuration.

However, there are also situations where both lines need to be shifted to achieve the desired result. This can occur when the relationship between the lines or the positioning of the lines relative to the graph requires adjustments to both lines.

Ultimately, the key is to carefully analyze the graph, understand the relationship between the lines, and identify the specific criteria or conditions that need to be met. This analysis will guide the decision of whether one or both lines should be shifted to obtain the correct answer.

Learn more about graph from

https://brainly.com/question/19040584

#SPJ11

Notice that 110 students out of the total number of students is the same as the number of degrees we are looking for out of 360 degrees.

Now, the total number of students is:

Then, if x is the number of degrees that we are looking for, we can set the following equation:

Multiplying the above equation by 360 we get:

Answer: 92 degrees.

Please find attached the drawing of two triangles which are drawn with MS Word, based on the possible difference of two triangles having a ASA and a SAA configuration.

Unique triangles are triangles that are different based on their configuration, which derives from the positioning of the given parameters to correspond with different congruency requirement.

The conditions for the congruency of two triangles are;

SSS: The Side-Side-Side rule; two triangles are congruent if all three sides of one triangle are congruent to the three sides of the other triangle

SAS: The Side-Angle-Side rule; two triangles are congruent if two sides and the included angle of one are congruent to two sides and an included angle in the other triangle

ASA: The Angle-Side-Angle rule; two triangles are congruent if two angles and the included side of one triangle are congruent to two angles and an included side of the other triangle

SAA: The Side-Angle-Angle rule; Two triangles are congruent if two angles and an a non included side of one triangle are congruent to two angles and the non included side of the other triangle.

RHS: Right angle Hypotenuse Side: Two right triangles are congruent if the hypotenuse side and one leg of one triangle are congruent to the hypotenuse side and one leg of the other right triangle.

The configuration of the unique triangles can therefore, be ASA and SAA, which gives the triangles;

Please see attached drawings of the two unique triangles

Learn more about the congruency of triangles here:

https://brainly.com/question/2938476

#SPJ1

A. Characteristics of Nigerian and Japanese Population Pyramids:

B. Challenges and Opportunities for Nigeria and Japan:

A. Characteristics of Nigerian and Japanese Population Pyramids:

Nigerian Population Pyramid:

Nigeria is a country in West Africa with a rapidly growing population. According to the 2017 estimate you provided, Nigeria had a population of approximately 201 million people.

The Nigerian population pyramid is likely to exhibit a broad base, indicating a high proportion of young individuals in the population.

There may be a relatively larger proportion of dependents, both young and old, compared to the working-age cohorts.

Gender disparities may exist within specific cohorts, potentially reflecting cultural or socioeconomic factors.

It is important to note that specific observations regarding the Nigerian population pyramid would require visual reference to the actual data and age cohorts.

Japanese Population Pyramid:

Japan, on the other hand, is a developed country in East Asia with a more mature population structure.

The Japanese population pyramid may exhibit a narrower base and a larger proportion of older individuals, indicating a declining birth rate and an aging population.

The working-age cohorts may be relatively smaller in comparison to the dependent cohorts, both young and old.

Gender disparities within specific cohorts may be less prominent compared to Nigeria.

Again, visual reference to the actual data is necessary for more accurate observations.

B. Challenges and Opportunities for Nigeria and Japan:

Nigeria:

Challenges: Nigeria's rapid population growth poses challenges in providing essential services such as healthcare, education, and infrastructure to meet the needs of a growing population. Additionally, high youth unemployment rates and income inequality can lead to social and economic challenges.

Opportunities: Nigeria's large and youthful population can be a potential demographic dividend if properly harnessed. Investing in education, skills training, and job creation can lead to increased productivity, innovation, and economic growth.

Japan:

Challenges: Japan's aging population presents challenges such as increased healthcare and pension costs, labor force shortages, and a decline in economic productivity. The shrinking working-age population may strain social welfare systems.

Opportunities: Japan can focus on technological advancements, automation, and attracting skilled foreign workers to address labor shortages. They can also encourage policies to enhance productivity and promote active aging to tap into the potential of older workers.

Please note that the challenges and opportunities described above are general observations and should be supplemented with specific data and research on the respective countries.

C. Rate of Natural Increase (RNI) and Ecological Impact:

Unfortunately, I don't have access to the specific table in the Bjelland textbook or the appendix you mentioned. However, I can provide some general information about the regions you mentioned:

South Asia: South Asia is one of the world's most densely populated regions. It includes countries like India, Pakistan, Bangladesh, and others. The RNI in South Asia is relatively high, indicating significant population growth. The ecological impact of the region depends on various factors such as resource consumption, industrial development, urbanization, and environmental policies.

East Asia: East Asia is home to densely populated countries like China, Japan, and South Korea. While China's population growth has slowed down due to its one-child policy, other countries in the region also face challenges related to aging populations. The ecological impact of East Asia depends on factors such as industrialization, urbanization, energy consumption, and environmental regulations.

Europe: Europe has a relatively low RNI and, in some countries, faces population decline or stagnation. The ecological impact of Europe depends on factors such as energy consumption, waste management, transportation systems, agricultural practices, and environmental policies.

Africa: Africa has the highest RNI among the regions mentioned. It is experiencing rapid population growth, which can have significant ecological impacts in terms of resource consumption, land use, urbanization, deforestation, and biodiversity loss. However, it's important to note that the ecological impact of a region is not solely determined by population size or growth rate but also by consumption patterns, technological advancements, and sustainable practices.

Read more about Population Pyramids here:

brainly.com/question/1437549

#SPJ4

Answer:

2070 people.

Step-by-step explanation:

We can set up the following proportion:

\(\frac{46}{100}=\frac{x}{4500}\)

Then, cross multiply, and you'll get your answer: 2070 people.

Hope this helped!

Answer:

2,070 people

Step-by-step explanation:

46% of 4,500 is 2,070

you can also solve this by doing 4,500 x .46 which will also give you 2,070

hope this helps :)