Reason why the crow blood is black

Answers

Answer 1

The reason why the crow is black can be traced to the presence of melanin pigments poduced by cells known as melanocytes.

Why is the crow's back black in color?

The reason that explains why the corw's back is black is the presence of melanin pigments produed by the cells in their skin, hair, and feather. In humans, these pigments are also responsible for the balck color of individuals.

The amount of melanin produced by the body can determine how dark a peron or animal appears. So, melanin os the causative factor for blackness.

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Related Questions

Select the features commonly present in a formal French garden.

topiaries

rock gardens

parterres

massed perennials

follies

bosquets

statues

torii

fountains

allees

Answers

Answer:

parteeres

Explanation:

rectangular reflecting pools or circular beds that play a geometrical counterpoint to the gardens right angled parteeres

What is the relationship between segments and septa?

Answers

Segments and septa are related anatomical structures found in various organisms, particularly in arthropods and annelids.

Segments: Segments are the division of the body into distinct repetitive units, often externally visible as repeated body parts. Examples include earthworms, millipedes, centipedes, and insects.

Septa: Septa are partitions or walls that separate individual segments or compartments within an organism's body, providing structural support and creating distinct compartments. They can be found internally or externally, dividing the body surface into discrete units.

Organisation, structure, and coordination are provided by segments and septa within the bodies of segmented organisms, enabling specialised functions within each segment while preserving the integrity of the entire body. Depending on the organism and the purpose they serve, septa may be membranous or more rigid in structure. Septa in segmented animals provide support and stop internal structures from moving or being displaced, preserving the integrity and functionality of each segment.

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Which of the following best describes the economic threshold in pest management?



the point at which treatment of the pest costs more than the pest damage

the point at which pest damage costs more than the potential value of the harvest

the point at which pest-management techniques increase profit

the point at which pest-management techniques are first employed

Answers

The point at which treatment of the pest costs more than the pest damage. Option A

What is the pest damage?

In pest management, the term "economic threshold" refers to the pest population level at which the expense of implementing pest control measures outweighs any potential economic losses brought on by the pest. It is the point at which using pest management methods or treatments is financially viable.

Below this point, treatment might not be required because it would be more expensive to control the pest than any potential harm it might cause.

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write the phenotype and genotype

Answers

Explanation:

The concepts of phenotype and genotype are related to genetics.

The phenotype is generally called the external appearance of the living thing, which is formed by the genetic information and environmental effects.

Genotype is the genetic information that an organism carries in its DNA.

For example; Character A is the favorite black color. a is the blue color character.

While the Aa display shows the individual with black eyes in the phenotype, the genotype is expressed as heterozygous dominant black eyes.

do the usage of synthetic plant hormones for the modification of plant growth have any environmental implications

Answers

The usage of synthetic plant hormones for the modification of plant growth can have environmental implications.

Understanding the Effect of Synthetic Plant Hormones

Factors to consider

1. Ecotoxicity: Synthetic plant hormones, if not properly regulated or used in excessive amounts, can pose risks to non-target organisms and ecosystems. They may affect the growth and development of other plants, beneficial insects, and microorganisms, potentially disrupting ecological balance.

2. Soil and Water Contamination: Improper application or disposal of synthetic plant hormones can lead to soil and water contamination. Runoff from treated fields or improper disposal of unused hormones may introduce these compounds into water bodies, potentially affecting aquatic organisms and overall water quality.

3. Resistance and Persistence: Repeated and excessive use of synthetic plant hormones can contribute to the development of resistance in target plant species. This can lead to the evolution of herbicide-resistant weed populations, requiring higher doses or different chemicals to achieve the desired effect. Moreover, some synthetic hormones may persist in the environment for extended periods, potentially impacting subsequent crops or natural vegetation.

4. Non-target Effects: Synthetic plant hormones may influence the growth and development of unintended plant species, leading to unintended consequences such as changes in biodiversity, alteration of natural plant communities, or interference with the natural ecological succession.

5. Human Health Concerns: The potential impacts of synthetic plant hormones on human health are an area of ongoing research. While these hormones are generally considered safe for use in agriculture when used according to regulations, there may be concerns related to exposure, residues, or indirect effects on food quality and safety.

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Describe the role of various human activities that place stress upon the environment. Demonstrate an understanding of the interrelationship between humans and the physical environment. Identify several major environmental problems and assess how this affects our ability to live in a sustainable way

Answers

Human activities such as agriculture are impacting upon the natural ecosystems.

What role does human activities play?

Environmental issues can result from considerable environmental stress caused by human activity. Natural resource exploitation and consumption, pollutant production, habitat destruction, and ecosystem modification are all frequent components of these activities.

Intensive farming methods, such as cutting down trees to make way for farms and using chemical pesticides and fertilizers, can deteriorate soil quality, cause deforestation, and cause runoff to pollute water. Ecosystems are disturbed, biodiversity is decreased, and deforestation causes climate change by releasing carbon dioxide that was previously held in trees.

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Human activities, such as deforestation, contamination, overfishing, and nursery gas outflows, disturb the environment, jeopardizing supportability by undermining biodiversity and biological system wellbeing.

Role of various human activities that place stress upon the environment

Human activities play a critical part in setting stress upon the environment, disturbing the fragile interrelationship between people and the physical environment.

Activities such as deforestation, mechanical contamination, overfishing, and nursery gas emanations contribute to major natural issues.

Deforestation leads to territory misfortune and expanded carbon dioxide levels, whereas mechanical contamination sullies discuss, water, and soil.

Overfishing disturbs marine environments and depletes angle populaces, and nursery gas emanations contribute to climate alteration.

These natural issues, in case, cleared out unaddressed, debilitate our capacity to live reasonably, jeopardizing biodiversity, clean discuss and water, and in general environmental well-being.

Accomplishing supportability requires adjusting human needs with natural preservation and advancing dependable asset administration.

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Complete the following sentence.
The average failure rate of start-up greenhouse businesses is _____
percent, a figure in keeping with other start-up businesses in the United States.

Answers

The average failure rate of start-up greenhouse businesses is 60 percent, a figure in keeping with other start-up businesses in the United States.

What are greenhouse businesses?

A horticultural enterprise pertains to a business engaged in cultivating plants within a greenhouse. Greenhouses are edifices enveloped in glass or plastic, affording growers the ability to regulate the internal environment. This grants them the opportunity to cultivate plants throughout the year, irrespective of external weather conditions.

Greenhouse businesses have the capacity to offer a diverse range of plants, encompassing blossoms, vegetables, herbs, and arboreal specimens. Additionally, they can supply plant-related merchandise, including seeds, fertilizers, and pesticides.

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Refraction occurs when the amplitude of a wave changes as it goes from one medium to another. yes or no?

Answers

Yes, it is true that when Refraction occurs the amplitude of the wave changes as it travels from one medium to the other.

Refraction is generally termed as bending of light ray when light travels from one medium to the other medium. Bending highly depends on whether the Medium may be dense or light.

Refraction may also be defined as the redirection or change of the direction of the wave that is passing from one medium to the other. It can be most commonly observed, for example, refraction in glasses, lenses etc.

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Which of the following best validates why growers make use of greenhouses?

Responses

they reduce infection risk

they provide superior control of the growth environment

they reduce production costs

they provide crop production at a lower labor investment

Answers

Answer:

B They provide superior control of growth


what would happen if the hydrogen ion pumps in the tigers mitochondiar stopped functioning

Answers

If the hydrogen ion pumps in the tiger's mitochondria stopped functioning, it would have severe consequences on the process of oxidative phosphorylation and the overall production of ATP (adenosine triphosphate), which is the energy currency of cells.

The hydrogen ion pumps, also known as the electron transport chain complexes, play a crucial role in oxidative phosphorylation. They are responsible for creating a proton gradient across the inner mitochondrial membrane by pumping hydrogen ions (protons) from the mitochondrial matrix to the intermembrane space. This proton gradient is essential for the functioning of ATP synthase, an enzyme that synthesizes ATP.

Without functioning hydrogen ion pumps, the proton gradient would not be established. As a result, ATP synthase would not be able to generate ATP efficiently. This would lead to a significant reduction in ATP production, which is essential for various cellular processes, including muscle contraction, biosynthesis of molecules, active transport, and maintenance of cellular homeostasis.

The lack of ATP production would cause a rapid depletion of cellular energy reserves. Cells would struggle to carry out their normal functions, and the tiger would experience a loss of energy and overall decline in physical performance. Vital processes such as muscle movement, digestion, and even basic metabolic functions would be compromised.

Additionally, the accumulation of hydrogen ions within the mitochondrial matrix would disrupt the pH balance, affecting the efficiency of other metabolic pathways and potentially leading to cellular damage or dysfunction.

In summary, the dysfunction of hydrogen ion pumps in the tiger's mitochondria would severely impair ATP production, resulting in a decline in energy levels and overall cellular function. It would have significant implications for the tiger's survival and well-being.

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The use of Zoysia is likely to produce which of the following benefits?

controlling weeds in a children’s playground

providing green growth when Bermuda grass is dormant

improving soil quality by adding nutrients to soil

reducing erosion on embankments

Answers

The use of Zoysia grass is likely to produce the benefit of reducing erosion on embankments. Option 4.

What is Zoysia grass?

Zoysia grass is a plant with dense growth habits with an extensive root system, which makes it effective in preventing soil erosion.

When planted on embankments or slopes, Zoysia grass helps stabilize the soil by binding it together with its roots, thereby reducing the risk of erosion caused by water runoff.

The dense growth of Zoysia grass also helps to trap sediment and slow down the movement of water, further reducing erosion.

While Zoysia grass can offer other advantages such as weed control and providing green growth when Bermuda grass is dormant, its ability to reduce erosion on embankments is one of its notable benefits.

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Week
1
Week
2
Week
3
Plant given fertilizer (height of
plant in centimeters)
6 cm
10 cm
12 cm
Plant not given fertilizer (height
of plant in centimeters)
3 cm
17 cm
5 cm
8 cm
Week
4
What conclusion can be drawn from this data?
10 cm
OA. Fertilizer does help plants grow faster.
B. Fertilizer only helps plants grow faster for one week.
C. No conclusions can be drawn from this data.
O D. Fertilizer does not help plants grow faster

Answers

The conclusion can be drawn from this data is C. No conclusions can be drawn from this data.

What does the data show?

The data shows that the plant given fertilizer grew faster than the plant not given fertilizer in weeks 1 and 3, but the plant not given fertilizer grew faster in weeks 2 and 4. This suggests that there is no clear relationship between fertilizer and plant growth.

There are a number of possible explanations for this. One possibility is that the fertilizer is not effective. Another possibility is that the plants are not responding to the fertilizer in the same way. It is also possible that other factors, such as the amount of water or sunlight the plants receive, are affecting their growth.

To draw a conclusion about the effect of fertilizer on plant growth, it would be necessary to conduct a more controlled experiment. This experiment would need to include a larger sample size and control for other factors that could affect plant growth.

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Which of the following best expresses the consequences of a failure at any stage of a hydroponic system?

they are limited mostly to problems of overwatering

they are limited mostly to one plant needing isolation from other plants

they can cause domino effects cascading through the entire system

they can easily be prevented and are of little consequence

Answers

One of the likely consequences of a failure at any stage of a hydroponic system is that it can cause domino effects cascading through the entire system. Option 3.

Consequences of failures in a hydroponic system

In a hydroponic system, each stage and component are interconnected and rely on one another for proper functioning. If there is a failure or issue at any stage of the system, it can disrupt the balance and functionality of the entire system.

For example, if there is a problem with nutrient delivery or imbalances in pH levels, it can affect the health and growth of plants throughout the system.

These issues can quickly spread and impact other plants, leading to a cascade of negative effects.

It is crucial to address and resolve any failures promptly to prevent further damage and maintain the overall health and productivity of the hydroponic system.

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Explain why tate of diffusion of carbon dioxide increases during exercise

Answers

Answer:

Hi

Please mark brainliest ❣️

Explanation:

When the body undergoes exercise, your body needs more energy, which means your tissues consume more oxygen than they do at rest.

Consuming more oxygen means you will also produce more carbon dioxide because your metabolic rate is elevated.

Answer:

During exercise, blood spends up to half the normal time (one second at rest) in the pulmonary capillaries due to the increase in cardiac output moving blood around the body more quickly.

Explanation:

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In which biome do animals have a thick layer of fat to keep them warm?

Answers

Answer:

tundra

Explanation:

Helppppppppppppp
......................................

Answers

Answer:

A triangleeeeeeeeeeeeeeeeeeeeeeeee

Explain why greenhouse systems are preferred for leafy greens, seedlings, and flowers but are less often used for other crops.??

Answers

Greenhouse vegetables include tomatoes, capsicum, cucumbers, eggplants, etc. Pest control is best done with healthy seedlings and proper maintenance in greenhouses.

A greenhouse is a building made of a transparent material that allows natural light to enter. The main elements of a greenhouse, such as the structure, cover/glazing, and temperature control system, need to be designed correctly for the growth of plants.

The greenhouse effect is the name given to a number of crops that thrive in a greenhouse environment. These include salad greens, peppers, cucumbers, spinach, and tomatoes.

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I need the answers this makes no sense ngl

Answers

Answer:

For A - answer is organism 2

For B- answer is glucose(C6H12O6) and oxygen(O2)

For C- Chloroplast

Complete the following sentence.
A grower who wishes to enhance plant growth by adjusting the carbon dioxide levels in the greenhouse will use a(n) _____ gas analyzer to evaluate CO2 levels.

Answers

A grower who wishes to enhance plant growth by adjusting the carbon dioxide levels in the greenhouse can use a carbon dioxide (CO2) gas analyzer to evaluate CO2 levels.

The amount of carbon dioxide, methane, and nitrous oxide in the atmosphere of Earth may be measured using a glasshouse gas analyzer.

Studies of the air quality in the field, leak identification, and natural gas monitoring may all be done using a glasshouse gas analyzer that analyses CH4, CO2, and H2O.

TIGER OPTICS, A. With extreme precision and accuracy, the T-I Max AIR CO2 glasshouse gas analyzer can test CO2 levels in the air.

Nova Analytical Systems provides CO2 analyzers that detect carbon dioxide levels in parts-per-million (ppm) or as a percentage using infrared technology.

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A mass extinction event is when over ____ of species die out in a relatively short
period of time.
A. 100%
B. 25%
C. 50%
D. 75%

Answers

A mass extinction event is when over 75% of species die out in a relatively short period of time. Therefore, the correct answer is: D. 75%

Earth's biodiversity declines rapidly and widely during an extinction event. A significant shift in the variety and abundance of multicellular organisms indicates such an event. It occurs when both the rate of speciation and the rate of extinction outpace the background rate.

A short period of geological time known as a mass extinction occurs when a significant portion of biodiversity, or distinct species—such as bacteria, fungi, plants, mammals, birds, reptiles, amphibians, fish, and invertebrates—die.

Impacts from comets and asteroid, widespread volcanism, climatic changes, rapid shifts in geography and ocean currents, or a combination of these can all lead to mass extinctions. The extinction of a single species is a characteristic of the flora and fauna of Earth.

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Which phase are most cells currently in ?

Answers

cells are most currently in :

interphase

Which of the following systems draws heat from the ceiling to specific areas in a green house?


forced air heat

convection tubes

radiant heat

fan ventilation

Answers

Convection tubes systems draws heat from the ceiling to specific areas in a green house.

What is a green house?

A greenhouse is a structure that grants individuals the ability to control climatic factors, including temperature and humidity. Various architectural styles of greenhouses exist, but typically, these structures incorporate expansive surfaces composed of translucent materials to harness the radiance and warmth of the sun.

Among the prevalent transparent materials employed in the roofs and walls of contemporary greenhouses, one finds sturdy plastics crafted from polycarbonate, pliable films manufactured from polyethylene, or even glass panels. When sunlight permeates the interior of a greenhouse, the internal temperature ascends, providing a protective haven for plants against inclement cold.

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how many amino acids can be coded for 288 bases?​

Answers

Answer:

76 amino acids can be coded for 288 bases.

Which of the following styles makes use of follies as a design element of the garden?

Japanese garden

French formal garden

English landscape garden

English cottage garden

Answers

The English landscape garden is the style that uses follies as a design element of the garden.  Option 3.

Follies and English landscape garden

Follies are architectural structures that serve primarily decorative purposes and are often whimsical or fantastical in nature.

They can take the form of ruins, temples, grottos, or other ornamental structures.

In English landscape gardens, follies are strategically placed within the landscape to create visual interest, focal points, or to evoke a sense of romanticism or nostalgia.

These gardens aim to mimic the natural landscape and often incorporate elements such as rolling hills, meandering paths, lakes, and woodlands. Follies are a key feature in this style, adding a touch of whimsy and intrigue to the overall design.

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The English landscape garden makes use of follies as a design element of the garden.

What are follies?

Follies, whimsical architectural embellishments, serve as captivating elements employed to infuse charm and diversity into a garden. Ranging from petite gazebos to imposing ruins, they bestow a touch of enchantment.

The English landscape garden, an artistic movement that blossomed during the 18th century, arose as a response to the rigid structure of the French formal garden. English landscape gardens, characterized by their inclination towards a more organic and relaxed aesthetic, frequently incorporate follies as captivating focal points, enriching the overall allure and diversity of the setting.

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Order the life cycle of very high-mass stars Nebula , protostar, red supergiant, supernova, average star and black hole ?

Answers

Supernova, high mass, nebula and protostar and red supergiant and then last black hole

5. Differentiate between:
a. Scientific study and general study

Answers

Scientific research is a investigating and acquiring or expanding our understanding whereas nonscientific research is acquiring knowledge and truths about the world using techniques that do not follow the scientific method.

there are different ___ of genes that code for all the differnt traits organisms can express

Answers

There are different alleles of genes that code for all the different traits organisms can express.

Even though there are 50,000 genes in every cell, only about 10% of them are expressed or switched on in any specific cell type.

Only a small fraction of a cell’s genes are transcribed at any given time. The variation in gene expression profiles among different cell types is due to the presence or absence of different sets of transcription regulatory factors. Some regulatory factors are designed to facilitate transcription, while others are designed to inhibit or inhibit transcription.

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Nature overcomes some natural disasters such as when a flooded mangrove forest or a Burnt forest are reborn study the photos on the right and give examples of how an old ecosystem might be destroyed and make way for a different ecosystem

Answers

One example of how an old ecosystem might be destroyed and make way for a different ecosystem is through a volcanic eruption. Volcanic eruptions can release large amounts of ash and lava that can bury or burn existing vegetation and wildlife. The ash can also alter the soil pH and nutrient levels, making it difficult for existing vegetation to survive. However, over time, new plant species can colonize the area, taking advantage of the newly available nutrients and space. These new plant species can then attract new wildlife, leading to the formation of a different ecosystem.

Another example is a wildfire. Wildfires can burn through forests and grasslands, destroying existing vegetation and wildlife. However, some plant species are adapted to survive wildfires, and their seeds may remain in the soil or be released after the fire. These plants can quickly grow back and start to rebuild the ecosystem. The burned areas can also become home to new plant species that thrive in the nutrient-rich soil that results from the fire.

A third example is a flood. Floods can inundate an area and destroy existing vegetation and wildlife. However, in areas like wetlands and mangrove forests, floods can also bring in new nutrients and sediment, creating new habitat for different plant and animal species. The flooded areas can also become breeding grounds for fish and other aquatic species, leading to the formation of a different ecosystem.

Which of the following substances used in soil-free mixes has a high silica count, offers good drainage, little water-retention, little if any nutritional value, and is comparatively heavy?

vermiculite
peat
sand
perlite

Answers

The substance used in soil-free mixes that has a high silica count, offers good drainage, little water retention, little if any nutritional value, and is comparatively heavy is sand.

The correct option is C.

What is the silica content of sand?

Sand has a high silica content, which provides good drainage in soil-free mixes. It has little water-retention capacity, meaning it allows water to pass through quickly.

Sand generally has minimal nutritional value for plants. It is also relatively heavy compared to the other substances listed.

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Which of the following best describes scaffolding branches?


new growth branches carrying the majority of blossom and fruit

secondary branches pruned away in second year of shaping

central branches preserved in central leader pruning

structural branches preserved to carry new growth in later prunin

Answers

Scaffolding branches are the central branches that are preserved in central leader pruning.  Option 3.

What are scaffolding branches?

Scaffolding branches refer to central branches that are preserved in central leader pruning.

These branches serve as the main structural framework of a tree and are selected to support future growth and development. Scaffolding branches are strategically chosen and maintained to provide a strong and balanced framework for the tree.

They act as the primary branches from which new growth will emerge in subsequent pruning and play a crucial role in shaping the overall structure of the tree.

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Question 25 of 75. All of the following taxpayers received a periodic annuity payment in 2021. In all cases, the annuity start date was in 2018. Which of the following taxpayers must calculate the taxable amount of their distribution using the general rule? a. Alexa (75) received her required minimum distribution from her traditional IRA. She made nondeductible contributions to the IRA several years ago b. Gregg (71) received a distribution from a 403(b) plan. c. Harmony (73) received a distribution from a nonqualified annuity plan that she purchased through a life insurance company. d. Sienna (69) received a distribution from a 401(k) plan. 1.2 (3 points) Let A be a square matrix such that A3 = A. Find all eigenvalues of A.Answer1.5 (3 points) Let p = a + a1x + a2x2 and q = b + b1x + b2x2 be any two vectors in P2 and defines an inner product on P2:(p,q) = aobo + a1b1 + a2b2Find the cosine of the angle between p = -2x + 3x2 and q = 1 + x x2.Answer Suppose that farmers can grow produce either coffee beans and cocoa beans with their resources (these are substitutes in production), and that there is an increase in demand for coffee. What would we expect to happen in the market for cocoa beans, everything else remaining the same? ( Select all applicable ones)A-price of cocoa beans will fall and quantity demanded will increaseB-supply curve for cocoa beans shifts downwardsC-supply curve for cocoa beans shifts upwardsD-price of cocoa beans will rise and quantity demanded will fallE-demand curve for cocoa beans shifts to the leftF-demand curve for cocoa beans shifts to the right Consider the following independent scenarios. 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Explain what this number means What is the appropriate measure of central tendency for parametric test: Mean Median Mode Range 0.25 points Save Claim: The second half of the decade in the 2000s included a significant economic expansion.What evidence in Source A supports this claim? aGDP decreased by about 2% from 2007 to 2008 bGDP decreased by about 1% from 2006 to 2007 cGDP increased by over 5% from 2009-2010 dGDP decreased by about 5% from 2008 to 2009 If there are outliers in a sample, which of the following is always true?a. Mean > Medianb. Standard deviation is smaller than expected (smaller than if there were no outliers)c. Mean < Mediand. Standard deviation is larger than expected (larger than if there were no outliers) Convert the complex number, z = 8 (cos(/4)+sin(/4)) from polar to rectangular form.Enter your answer as a + bi. !!!HELP ASAPP!!!Busca. Find the words that complete the following sentences.1. Mara est _____ una carta.2. Nosotros ______ tomando fotos.3. 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