B. How can radiometric dating and relative dating be used together to date the age of a rock strata or an organism?

C. How can radiometric dating and relative dating be used together to date the age of the Earth?​

Answers

Answer 1

Answer:

B. To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.

C. Radiometric dating, which relies on the predictable decay of radioactive isotopes of carbon, uranium, potassium, and other elements, provides accurate age estimates for events back to the formation of Earth more than 4.5 billion years ago.

Explanation:

Sorry this is all could find, sorry if this doesn't help.

Answer 2

The primary distinction between relative dating and radiometric dating is that relative dating is a method for determining the age of rock layers based on their relative depth.

Radiometric dating, on the other hand, is a way of determining the absolute age by using the decaying products of natural radioactive decay.

How do geologists use Radiometric Dating?

To calculate the age of a rock or fossil, researchers use a clock to determine when it was formed. To date ancient events, geologists usually employ radiometric dating methods, which are based on the natural radioactive decay of particular elements such as potassium and carbon, as trustworthy clocks.

Radiometric dating, which is based on the predictable decay of radioactive isotopes of carbon, uranium, potassium, and other elements, provides precise age estimates for events stretching back to the Earth's origin more than 4.5 billion years ago.

For more information about Radiometric dating refer to the link:

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Related Questions

Please Help, if your answer is correct I can make you Brainliest
Significant dates of observations, studies, and exploration go back to the 1600s and continue until today.


•1609 Thomas Harriot observes the Moon, makes drawings, and makes the first maps of the Moon.


•1609 Galileo Galilei publishes his scientific observations of the Moon.


•1959–1976 Russia completes 17 robotic missions on the Moon; Russia is the first to see the far side of the Moon and gather three samples.


•1961–1968 The United States completes three robotic missions and leads the way for future Apollo missions to the Moon.


•1969 Neil Armstrong is the first man to walk on the Moon.


•1994–1999 Lunar missions collect evidence of water ice at the lunar poles.


•2007–2008 Japan and China start one year missions to orbit the Moon.


•2008 NASA forms the Lunar Science Institute to lead research and lunar exploration.


•2009 The United States returns to lunar exploration with the Reconnaissance Orbiter and the LCROSS being launched.


•2011 NASA launches a spacecraft to study the surface and interior composition of the Moon.


•2013 NASA launches a spacecraft to study the atmosphere of the Moon.


•2013 China lands a robotic spacecraft on the Moon.


Look at the list of Moon explorations. Choose one you find interesting. Why do you think it was important?

Answers

One exploration that I find interesting is the Apollo 11 mission in 1969, where Neil Armstrong became the first man to walk on the Moon. This mission was important for several reasons:

1. It marked the first time humans had set foot on another celestial body and marked a major achievement in space exploration.

2. It was a major achievement for the United States during the Cold War, showing that the US was technologically advanced and capable of achieving ambitious goals.

3. It brought the world together, as people of all nations watched the event unfold on television.

4. It inspired future generations to pursue careers in science, technology, engineering, and mathematics, and also sparked interest in space exploration and research.

5. It also led to a better understanding of the Moon's surface, geology, and environment, which in turn led to further scientific discoveries and technological advancements.

This mission was a major milestone in human history, and it continues to inspire and motivate future generations to explore and understand the universe.

Answer:

One exploration that I find interesting is the Apollo 11 mission in 1969, where Neil Armstrong became the first man to walk on the Moon. This mission was important for several reasons:

1. It marked the first time humans had set foot on another celestial body and marked a major achievement in space exploration.

2. It was a major achievement for the United States during the Cold War, showing that the US was technologically advanced and capable of achieving ambitious goals.

3. It brought the world together, as people of all nations watched the event unfold on television.

4. It inspired future generations to pursue careers in science, technology, engineering, and mathematics, and also sparked interest in space exploration and research.

5. It also led to a better understanding of the Moon's surface, geology, and environment, which in turn led to further scientific discoveries and technological advancements.

This mission was a major milestone in human history, and it continues to inspire and motivate future generations to explore and understand the universe.

Georgia’s natives primarily used what material to make arrow heads?

Answers

Answer:

Stones and obsidian

Explanation:

Georgia’s natives primarily used stones and obsidian to make arrow heads.

stones and obsidian

Which of the following refers to the number and variety of species found on earth?
o Genetic Diversity
O Genetic Variation
O Species Diversity
O Species Variation

Answers

Answer:

Hey!

Your answer is  Species Diversity!

Explanation:

The meaning of Species diversity is the population of species and abundance of each species which have a habitat in a particular location. (the location here is EARTH)

Hope this helps!

*if its wrong you can let me know!*

Answer:

Species diversity. Have a great day! :)

Which is a result of seafloor spreading?

A magma piles up on top of the plates involvedmagma piles up on top of the plates involved


B earthquakes occur along the edge of the larger plate earthquakes occur along the edge of the larger plate


C the plates involved grow in size as the ocean floor extendsthe plates involved grow in size as the ocean floor extends


D the plates involved are cracked on the surface

Answers

Seafloor spreading creates new crust. Subduction destroys old crust. The two forces roughly balance each other, so the shape and diameter of the Earth remain constant.

Which is a result of seafloor spreading?A magma piles up on top of the plates involvedmagma piles up
Answer: C

I know it’s not A nor B and I don’t think it’s D so C because the ocean floor is extending.

PLEASE ANSWER CORRECTLY The picture shows a landform that broke apart and the rock fell into the valley below. The rock was in high mountains, often subjected to harsh weather. The rock was made of solid granite and there were few plants growing on the cliff.



Based on the evidence, what most likely caused the rock to fall?

Choose the correct answer.


1.Acid rain dissolving a fragile portion of the rock


2.Freeze-thaw forming cracks in the rock and spreading the cracks over time

3.Tree roots growing between cracks in the rock and pushing the rock away from the cliff
OR
4.Oxidation by oxygen and water creating rust that slowly wore the rock away from the cliff

PLEASE ANSWER CORRECTLY The picture shows a landform that broke apart and the rock fell into the valley

Answers

Answer: Freeze-thaw forming cracks in the rock and spreading the cracks over time

Explanation: it looks like it was cut clean off unlike options 2 and 3 which would dissolve the entire cliff not just the rock also acid rain doesn't seem close to a possibility

Answer:

ima go with 2

Explanation:

none of the other ones make senens

What color is the sky, grass, and the sun?
Thx

Answers

Answer:

☆<《HOPE IT WILL HELP YOU >

Explanation:

The colour of :-

sky is white but it appears Blue

grass is green

sun is orangies yellow dut it appears white

please mark my ans as BRAIN LIST

Sky- blue or gray

Grass - green if cared for

Sun - yellow :)

How do physical characteristics determine the classification of vertebrates as mammals, amphibians, fish or birds.

Answers

vertebrates are animals or organisms that are considered to have a back bone and full bone structure. with that being said animals like dogs, cats, and other mammals are good examples of vertebrates

U-shaped valleys provide evidence of which process?(1 point)
Responses

coastal erosion
coastal erosion

deposition
deposition

wind erosion
wind erosion

glacial erosion

Answers

Answer:

process of deposition is evidenced through u shaped

Glacier erosion.
Because U-shaped valley is caused by glaciers

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

Answers

Answer:

lol

Explanation:

Answer:

Explanation:

No my answer is the best

Earth’s Structure

outer core upper mantle crust

lower mantle continents


Choose words from above to complete the paragraph below.

Around Earth’s inner core is the (1)____________. This layer is liquid metal. Above the outer core is Earth’s mantle. The (2)_________________ is hotter and softer than the (3)___________. The land on Earth’s surface is called the (4)____________________. Above water, the crust forms our (5)_____________, and below water it is the floor of the oceans.

Answers

Answer:

i all ready learned that not doing it twice sry it is essay

Explanation:

1 outer core

2 lower mantle

3 upper mantle

4 crust

5 continents

Tell me if I’m wrong.

Hope this helps!

Leaving Main Street Quick Write

Answers

this is not a question
?? What’s the actual question???

how do physical systems affect human systems

Answers

Answer:

Human system and development is shaped by geographic features like mountains, deserts, and water. ... Physical systems and human systems shape a place as the earth's physical landscapes are wide-ranging and very diverse. Climates vary,soil types vary, vegetation varies, and topography varies across the planet.

How physical systems affect human systems…. Physical systems and environmental characteristics do not, by themselves, determine the patterns of human activity; however, THEY DO INFLUENCE AND CONSTRAIN THE CHOICES PEOPLE MAKE.

Your _________ is simply your weight-to-height ratio which can be calculated using certain body measurements.

A.
health

B.
size

C.
weight loss

D.
BMI

Answers

Answer:

BMI

this is too easy man cmon

Answer:

D

Explanation:

Help!
Sedimentary rocks form when sand, mud, and pebbles create layers on top of each other. The pressure builds as each layer is added and eventually the layers turn to rock.

What role does energy play in the formation of sedimentary rock?
A.
Rain provides the energy needed to bring sand, mud, and pebbles to one location where energy from the Sun changes them to rock.
B.
Rain cools sand, mud, and pebbles into hard layers that solidify using energy from the Sun.
C.
The heat from the Sun melts sand, mud, and pebbles which then cool and solidify into rock that can be broken down again through erosion.
D.
Energy from the Sun creates the cycle of rain and wind that causes erosion to produce sedimentation.

Answers

Answer:

A.

Explanation:

Rain provides the energy needed to bring sand, mud, and pebbles to one location where energy from the Sun changes them to rock.

Answer:

Explanation:

The correct option to the question is option D- Energy from the Sun creates the cycle of rain and wind that causes erosion to produce sedimentation.

Sedimentation is the process in which the heavy particles in suspension lie down in the bottom due to effect of gravity. The sedimentation is phase wise process in which first there is weathering of rocks in which the rocks reduce into smaller particles. The smaller particles are then transported and then they are deposited in a place. Over a period of time, the materials aggregate and then they harden to form sedimentary rocks.

To know more about sedimentary rocks:

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Describe the distribution of deserts in Africa

Answers

Answer:  Along the Tropic of Cancer, between 15 and 30 degrees north of the Equator, or along the Tropic of Capricorn, between 15 and 30 degrees south of the Equator.

Explanation:

Hope this helps

Long answer: Africa is a continent known for its diverse and extensive desert landscapes. The distribution of deserts in Africa is primarily influenced by various factors, including climate patterns, geological features, and atmospheric circulation systems. Here is an overview of the major deserts found in Africa:

   Sahara Desert: The Sahara Desert is the largest desert in Africa and the world. It spans across several countries, including Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Sudan, and Tunisia. The Sahara covers an enormous area of approximately 9.2 million square kilometers (3.6 million square miles) and is characterized by vast stretches of arid land, rocky plateaus, sand dunes, and occasional mountain ranges.

   Kalahari Desert: Located in southern Africa, the Kalahari Desert spans across Botswana, Namibia, and South Africa. It covers an area of around 900,000 square kilometers (350,000 square miles). The Kalahari is a semi-arid sandy savannah, with sparse vegetation, grasslands, and intermittent rivers.

   Namib Desert: The Namib Desert is situated along the southwestern coast of Africa, spanning across Namibia, Angola, and South Africa. It is considered one of the oldest deserts globally, characterized by extensive sand dunes, gravel plains, and rocky outcrops. The Namib Desert stretches over approximately 2,000 kilometers (1,200 miles).

   Libyan Desert: Also known as the Western Desert, the Libyan Desert is located in western Egypt, eastern Libya, and northwestern Sudan. It is part of the larger Sahara Desert and features vast sand seas, rocky plateaus, and occasional oases. The Libyan Desert is known for its extreme aridity and harsh conditions.

   Nubian Desert: Situated in northeastern Sudan and extending into southern Egypt, the Nubian Desert is a relatively small desert region compared to others in Africa. It is characterized by rocky terrain, sand dunes, and scattered vegetation.

   Danakil Desert: Located in the northeastern part of Ethiopia and extending into Eritrea and Djibouti, the Danakil Desert is a volcanic desert known for its extreme temperatures, geothermal activity, and salt flats. It is one of the hottest places on Earth.

   Chalbi Desert: Situated in northern Kenya, the Chalbi Desert is a semi-desert region characterized by a mixture of sandy and rocky terrain. It is part of the larger East African Rift Valley and experiences occasional seasonal floods.

   Sahara el Beyda: Translated as the "White Desert," Sahara el Beyda is a desert region in eastern Libya known for its unique white chalk rock formations and sand dunes. It is part of the larger Libyan Desert.

It's important to note that the boundaries between these deserts are not always well-defined and may overlap in certain areas. Additionally, smaller desert regions and arid landscapes can be found throughout various parts of the continent, contributing to the overall desertification of Africa.

Short answer: Africa is home to several major deserts, with the Sahara Desert being the largest and most well-known. Other significant deserts in Africa include the Kalahari Desert, Namib Desert, Libyan Desert, Nubian Desert, Danakil Desert, Chalbi Desert, and Sahara el Beyda. These deserts are spread across different regions of the continent, each characterized by unique landscapes and climatic conditions.

Why do YOU THINK that China and Japan are nicknamed the "Far East?"

Answers

europeans traveled far to the east to reach cathay ,japan and indies, so they gave them the name “far east”
when the europeans traveled far to the east to reach the cathay the japan & indies gave the more distant regions the name far east .

I will give brainiliest to whoever is correct!

I will give brainiliest to whoever is correct!

Answers

i think it would be C

Answer:

Definitely C

Explanation:

Match the section of Europe with its climate.


1. warm, with dry summers

2. hot summers, cold winters

3. cold climate

4. dry

5. heaviest rain

-eastern Spain
-high latitudes
-Mediterranean
-great plain

Answers

Answer:

hot summers cold winters

Great plain hot summers, cold winters

High latitudes are cold climate

Mediterranean is heaviest rain

Eastern spain is warm with dry summers

Which statement describes a feature of a conic projection?

Pilots use this projection type.
The equator usually serves as the central point.
Latitude lines connect at a central point.
Conic projections are the most distorted type.

Answers

I think it is c

Explanation:

don't really use this answer because I'm not sure

Answer:

c

Explanation:

An important religious, historical, or cultural site that should be visited while in Morocco.

Answers

Essaouira.

Explanation: The mellah in Essaouira has become a popular pilgrimage site for thousands of descendants of Moroccan Jews.

Answer:Mellah é um antigo bairro judeu que pode visitar em Marraquexe. Tem uma praça e uma das mais antigas sinagogas da cidade marroquina, datada do século XVI. O Mellah tinha uma porta fortificada e era rodeado por uma muralha. Era uma zona de protecção. . Ao caminhar pelas ruas do bairro é possível conhecer bem de perto o modo de vida e a cultura judaica

Mellah é o nome usado em Marrocos para designar um bairro de judeus amuralhado de uma cidade. É um conceito similar ao das judiarias ibéricas e aos guetos da generalidade da Europa. Nas zonas rurais, onde é comum uma certa dispersão nos povoados, que frequentemente eram tradicionalmente um conjunto de ksars, cada um de seu clã ou tribo, os mellahs eram autênticas aldeias separadas habitadas exclusivamente por judeus.

Explanation:

A marine food web is provided below. Describe
the relationship between the squid and the tuna.

A marine food web is provided below. Describethe relationship between the squid and the tuna.

Answers

Answer:

The squid eats the tuna

Explanation:

Squid eats the tuna

I rlly need to know on this one bc I don’t get it.

How do the mountains in Eastern Europe keep countries isolated?

I rlly need to know on this one bc I dont get it. How do the mountains in Eastern Europe keep countries

Answers

Answer:the mountains act as a natural barrier keeping the other human settlements out

Explanation:

Mountains serve as the physical barriers between modern nations states, but also their languages, traditions, and values.

Match the science with the best description
1. astronomy
the study of weather and climate
2. geology
the study of the stars, planets, and
galaxies
3. oceanography
the study of water, mainly oceans
4. meteorology
the study of minerals and rocks

Answers

Answer:

3. Oceanography is the study of water, mainly oceans

Explanation:

Answer:

astronomy- the study of the stars, planets, and galaxies

geology- the study of minerals and rocks

oceanography- the study of water, mainly oceans

meteorology- the study of weather and climate

Please give brainliest i need it!!!

Which option is the main form of energy involved in photosynthesis?

mechanical energy
heat energy
light energy
sound energy

Answers

The answer is light energy my friend
Light energy, photosynthesis uses the light energy from the sun to function.

Millions of years ago, the Sierra Nevada region began to be uplifted along a crack in Earth's crust. The region on the other side of the crack moved downwards. Which physical feature most likely resulted from such a motion?

Fault block mountain with rough edges and steep cliffs
Fault block mountain with waves, twists, and turns
Folded mountain with rough edges and steep cliffs
Folded mountain that appeared wavy

Answers

Fault block mountain with rough edges and steep cliffs resulted from the Sierra Nevada region being uplifted in Earth's crust and the region on the other side of the crack moving downwards. So. option (a) is relevant.

What are Fault blocks ?

The Earth's crust experiences tectonic and localized forces that result in very huge chunks of rock called fault blocks, some of which can span hundreds of kilometers. Faults separate large regions of bedrock into separate blocks. Blocks are distinguished by reasonably consistent lithology. The largest of these fault blocks are crustal blocks.. Terranes are big crustal pieces that break off from tectonic plates. Microplates are terranes that span the entire lithosphere's thickness. Continent-sized blocks are referred to by a variety of names, including extensional allochthons, H-blocks, continental ribbons, and outer highs.

The effects of moving blocks vertically, however, are much more striking. Sometimes, landforms (such as mountains, hills, ridges, lakes, valleys, etc.) are created when faults have a significant vertical displacement. High escarpments can be created by nearby down-dropped (grabens) and raised (horsts) blocks. Due to compaction or stretching of the crust at that location, the movement of these blocks is frequently accompanied by tilting.

To know more about, fault blocks, visit :

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#SPJ1

Answer:

A

Explanation:

Just trust me. =)

1. Describe the geography of New England, including the land, rivers, and climate.

3. Describe the geography of Virginia, including the land, rivers, and climate.

(There is also giving a paragraph of economic activities most likely to succeed in Virgina and New England but you don't have to do that, I might be able to figure it out myself)

Answers

Answers could include the following:

 • The land in New England is rocky.

• There is almost no coastal plain.

 • Summers are short and winters are long.

• Most of the rivers flow south.

 • Waterfalls near the ocean make inland transportation difficult.

Answer:The land in New England is rocky.

There is almost no coastal plain.

Summers are short and winters are long.

Most of the rivers flow south.

Waterfalls near the ocean make inland transportation difficult

Explanation:

Please Help, I want this immediately
Choose the correct answer.
1. Fault lines and earthquakes happen at which type of boundary?
-convergent boundary
-transform boundary
-divergent boundary
2. Which type of boundary created the feature "Ring of Fire"
-convergent boundary
-transform boundary
-divergent boundary

Answers

1. Divergent boundary
2. Transform boundary
Divergent
Transform

Pls Help and explain how to solve and do this problem.
Question: What are the groups to which you belong? Indicate whether they are primary or secondary groups.
(Ps: How to write a paragraph or at least 7 sentence)

Pls Help and explain how to solve and do this problem.Question: What are the groups to which you belong?

Answers

Explanation:

Primary Groups

Primary groups are those that are close-knit. They are typically small scale, include intimate relationships, and are usually long lasting. The members of primary groups feel a strong personal identity with the group

Secondary Groups

are another type of social group. They have the opposite characteristics of primary groups. They can be small or large and are mostly impersonal and usually short term. These groups are typically found at work and school. An example of a secondary group is a committee organized to plan a holiday party at work. Members of the committee meet infrequently and for only a short period of time.

Answer:Primary GroupsPrimary Groups are those that are close-knit.They are typically small scale, include intimate relationships, and are usually long lasting.The members of primary groups feel a strong personal identity with the group.A Primary group is typically a small social group whose members share close, personal, enduring relationships.Families and close friends are examples of primary groups.People in a secondary group interact on a less personal level than in a primary group.The distinction between primary and secondary groups was originally proposed by Charles Horton Cooley.This family from the 1970s would be an example of a primary group.Primary groups are marked by concern for one another, shared activities and culture, and long periods of time spent together.They are psychologically comforting and quite influential in developing personal identity.Families and close friends are examples of primary groups.The goal of primary groups is actually the relationships themselves rather than achieving some other purpose.A primary group is a group in which one exchanges implicit items, such as love, caring, concern, support, etc.Examples of these would be family groups, love relationships, crisis support groups, and church groups. Relationships formed in primary groups are often long lasting and goals in themselves.They also are often psychologically comforting to the individuals involved and provide a source of support and encouragement.

Example of Primary Group - Nuclear Family


Secondary GroupsIn the field of sociology, professionals use the concept of social groups to describe interactions and expectations between defined collectives of people.Specifically, a social group is any group of two or more people who interact with each other regularly for a well-defined reason or purpose, share similar characteristics, and maintain a common identify as a community.A further breakdown of social groups can be made to include both secondary groups and primary groups, each interacting in different ways and grouped for different reasons.A secondary group is defined in sociology as a group of people with the same shared purpose, most often that of completing a task. Secondary groups are typically large in size and impersonal, meaning they share no intimate bonds, are goal-focused, and in some cases are time-limited rather than focused on supporting needs of each group member individually.Furthermore, they are often highly structured, with formal rules and supervision from a designated authority figure. Most people are involved in many more secondary groups than primary groups.For example, a person might be a student in a classroom or a or worker or supervisor in an office; both the student body and the office staff act as secondary groups.Such groups may only function for a short duration, most often until a goal has been met or outcome achieved.

Example of Secondary Group - Sports Team


Hope my answer helps you.

:)

Please mark my answer as the BRAINLIEST. Plssssssssssssssssssss

Forgive me if I wrote the same points again and again.

Please don’t delete my answer.

Which pair of regions are both part of the Central American cultural regions?

Guatemala and California
Panama and Costa Rica
Yucatan Peninsula and Northern Mexico
Belize and Yukon Territory

Answers

Answer
Panama and Costa Rica
Im pretty sure !

Answer: Panama and Costa Rica

Evidence:

Those countries are located in Central America.

Help meeeeee
plsssss

Help meeeeee plsssss

Answers

D- volcanic eruptions hope this helps!!
It’s d…… hope it is
Other Questions
DNA code is TAC ACA CGA GGA GGG TCT AAA ATT what is the sequence of amino acids?bio John works at a one story steakhouse. On the busiest day, he disappeared. The boss called the police. The police three suspects. The trainee server said: "I last saw john parking his bike outside." The chef said: "I last saw John in the kitchen getting orange juice. The cook said: "I last saw john go upstairs." Who is it? Tides are always_____forced waves free waves standing waves seiches Do you agree or disagree with the statement: "A rise of -7C" means "a fall of 7C"? Explain. The pulley shown in the attached diagram has a diameter of 30 centimeters and a mass of 19 kilograms. The pulley is a solid disk with an axle through its center.(a.) What is the moment of inertia of the pulley? (b.) What is the magnitude of the net torque on the pulley about its axis(c.) What is the direction of the net torque on the pulley? (d.) What is the magnitude of the angular acceleration of the pulley?(e.) What is direction of the angular acceleration? Can CSR make a significant contribution to addressingthe global challenge of climate change? If so,how? If not, why not? Please class can you help me to simplify in the lowest terms 4x/7-x/21 What is the decimal multiplier to decrease by 39% find the volume of the solid obtained by rotating the region Rabout the y-axis, where R is bounded by y=5x-x^2 and the liney=xa. 27pi/2b. 64pi/3c. 32pi/3d. 128pi/3e. no correct choices Nutted now Im shaking Braque was inspired by _____________________________. a. fauvist artists and picassos le demoiselles davignon b. picassos still life with chair caining and primitivism c. primitivism and matisses work d. the thought of creating completely original work Please help me thank you. 2y/(z-y)x=4y solve for x Example: Yo como chocolate. (comer - to eat)Ellatamales. (cocinar - to cook)len Mxico. (vivir - to live)Nosotroslas pizzas. (cortar - to cut)t salsa picante? (comer - to eat)usted caf? (beber - to drink) Which of the following components of the cell membrane is responsible for active transport?APhospholipidBProteinLipidDPhosphateECholesterol What characteristic feature of Fauvism reveals the influence of Post-Impressionist painters such as Paul Gauguin?an emotionally expressive impactambiguous spatial relationshipsemotional intensity Testing the effects of radiation on the growth of tardigrades there were 3 levels, 1, 2, and 3.Sample size-2 per level Mean Variance Level 3 (highest radiation) 83.74 14Level 2 (medium level) 65.83 16Level 1(Lowest radiation) 56.76 23 Assume all variances the same a. If the means are the same, each mean has the same mean, and a variance of sigma2/2, so we can build 2 estimates of variance, we can i. Calculate Meantot=(mean1+mean2+mean3)/3, and var1-2* (sum(meani- meantot)A2)/2 ii. Calculate Var2=generalize the pooled estimate of variance from the outside the book, class notes (lecture 18), Calculate it. iii. Calculate Var1/Var2"F with 2 and 3 degrees of freedom (why 3 df)b. Test if the 2 estimates of variance are the same c. If Var1>>Var2, what does that mean about the means of the data which process demonstrates no massive effects of messages from opinion leaders, but a reinforcement of people's attitudes and opinions? find the area of the credit card width 3 1/3in length 2 1/4in When alcohol or other depres-sants slow down the work of this organ,all other body parts are slowed also.