I need help with 2 questions, I don't understand how to do them. Any help would be greatly appreciated!

The length of CE is 3.6 and the radius of the circle is 2

Start by calculating the length of AD using:

AD^2 = AC^2 - CD^2

This gives

AD^2 = 10^2 - 6^2

AD^2 = 64

Take the square roots

AD = 8

Represent CE with x.

So:

AE = 10 - x

Calculate ED using:

ED^2 = CD^2 - CE^2

ED^2 = AD^2 - AE^2

So, we have:

AD^2 - AE^2 = CD^2 - CE^2

This gives

8^2 - (10 - x)^2 = 6^2 - x^2

Expand

64 - 100 + 20x - x^2 = 36 - x^2

Add x^2 to both sides

64 - 100 + 20x  = 36

Evaluate the like terms

20x = 72

Divide by 20

x = 3.6

Hence, the length of CE is 3.6

The equation is given as:

x^2 + y^2 + 6x + 5y = -45/4

Rewrite as:

x^2 + 6x + y^2  + 5y = -45/4

Take the coefficients of x and y

Divide them by 2, square the result and add the result to both sides.

So, we have:

x^2 + 6x + (6/2)^2 + y^2  + 5y + (5/2)^2= -45/4+ (6/2)^2 + (5/2)^2

This gives

x^2 + 6x + (6/2)^2 + y^2  + 5y + (5/2)^2= 4

Express as perfect squares

(x + 3)^2 + (y + 5/2)^2 = 4

The circle equation is represented as:

(x - a)^2 + (y - b)^2 = r^2

Where r represents the radius

By comparison, we have:

r^2 = 4

This gives

r = 2

Hence, the radius of the circle is 2

Read more about circle equation at:

https://brainly.com/question/10618691

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Which statement BEST summarizes how climate change can affect the mass migration of humans on Earth?

A
Climate change can increase the risks of natural hazards in a location, increasing the number of humans that migrate to it.

B
Climate change can increase the amount of natural resources available in areas, attracting humans to migrate to those locations.

C
Climate change can decrease the carrying capacity of areas, forcing humans to migrate to other locations where their needs can be met.

D
Climate change can decrease the rate of natural processes in a location, causing humans to migrate to areas where processes occur quickly.

To turn left from a one-way street onto a one-way street, use:

How many liters each of a 50% acid solution and a 75% acid solution must be used to produce 90 liters of a 60% acid solution? (Round to two decimal places if necessary.)

How does recycling plastic bags into composite lumber MOST LIKELY benefit ecosystems?

A
Recycling reduces the use of plastic bags.

B
Recycling reduces direct harm to organisms.

C
Recycling reduces mining and drilling for fossil fuels.

D
Recycling reduces carbon dioxide in the atmosphere.

A rainstorm in Portland, Oregon, has wiped out the electricity in about 7% of the households in the city. A management team in Portland has a big meeting tomorrow, and all 6 members of the team are hard at work in their separate households, preparing their presentations. What is the probability that none of them has lost electricity in his/her household? Assume that their locations are spread out so that loss of electricity is independent among their households.
Round your response to at least three decimal places.

In Center City, the ratio of people to dogs is 4:1, and the ratio of dogs to cats is 3:2. What is the ratio of people to cats?

Around half of the electricity used in the United States is powered by burning coal. The United States is a developed country with a high level of carbon emissions. Select TWO realistic actions that could help to provide energy for the United States and also help to lower carbon emissions.

A
Create more fossil fuels.

B
Build additional power plants.

C
Reduce the demand for energy.

D
Use renewable sources of energy.

E
Make products that are more efficient.

F
Develop technology to better harvest fossil fuels.

According to the text, which THREE phenomena are a direct result of, or are made worse by, human activities?

A
reduction in seasonal river flooding

B
creation of barrier islands

C
fluctuation of sea levels

D
loss of river sediments

E
deposition of delta sediments

F
filling in of wetlands

Listed below are body temperatures from five different subjects measured at 8 AM and again at 12 AM. Find the values
of d and s. In general, what does μ represent?
Temperature (°F) at 8 AM 98.4
98.7 97.5 97.3 97.1
Temperature (°F) at 12 AM 99.0 99.3 97.9 96.9 97.5
Let the temperature at 8 AM be the first sample, and the temperature at 12 AM be the second sample. Find the values
of d and
Sd.
(Type an integer or a decimal. Do not round.)

According to the text, which THREE phenomena are a direct result of, or are made worse by, human activities?

A
reduction in seasonal river flooding

B
creation of barrier islands

C
fluctuation of sea levels

D
loss of river sediments

E
deposition of delta sediments

F
filling in of wetlands

If warming trends continue, which of the following could happen to the glacial ecosystem? Choose ALL that apply.

A
Glacial runoff will begin earlier in the year, and as a result, streams will also warm earlier. Warmer streams will affect native fish populations.

B
Glacial melt and warmer temperatures will increase humidity levels in the ecosystem. This will decrease fish populations that thrive in colder climates.

C
Glacial loss will cool parts of the ecosystem, but because overall temperatures are warmer, precipitation will increase. Increased rain will raise stream and lake levels and increase fish populations.

D
Glaciers will melt into nearby bodies of water. The water levels will rise and create an overall cooling effect on the ecosystem, resulting in a net zero temperature change. The fish population will be unaffected.

E
Glaciers will melt into nearby oceans, causing the salt levels of the ocean to go down. This will increase the available habitat for fish and cause an increase in the nearby population.

Which BEST describes climate change and least developed countries?

A
Least developed countries are barely affected by climate change because they are surrounded by developed countries.

B
Least developed countries are not affected by climate change because they are not in areas where emissions are high.

C
Least developed countries are the most responsible for climate change because they are the lowest producers of energy.

D
Least developed countries are the most vulnerable to climate change while contributing the least amount of greenhouse gases.

How much principal must be
invested to earn $36 in 1/2 a year
at an interest rate of 8%?

Which statement about energy usage is supported by the passage?

A
Developed and developing countries use less energy and create less emissions than least developed countries.

B
Developed and developing countries use more energy and create more emissions than least developed countries.

C
All countries, regardless of development, use different amounts of energy but create the same amount of emissions.

D
All countries, regardless of development, use the same amount of energy but create different amounts of emissions.

If anyone cares to leave( he or she, they) may do so now.

what state is called the sunshine state​

Choose THREE agricultural activities that humans perform to minimize their impact on climate change.

A
drain wetlands

B
plant cover crops

C
leave land untouched

D
use additional fertilizers

E
breed drought tolerant plants

F
clear additional land for livestock

The following question has two parts. First, answer Part A. Then, answer Part B.

Part A:

Based on the charts in the passage, how has the production of coal and solar energy in California changed between 2005 and 2015?

A
The production of both coal and solar increased.

B
The production of both coal and solar decreased.

C
The production of coal increased, while the production of solar decreased.

D
The production of coal decreased, while the production of solar increased.

Part B:

Which statement BEST explains why the change in coal and solar production most likely occurred?

A
Solar energy technology has improved and increased in capacity, but coal has decreased in capacity because it is a limited resource.

B
Solar energy technology has improved and increased in capacity, while coal has also increased in capacity because new coal forms all the time.

C
Solar energy technology has become too complex and decreased in capacity, but coal has increased in capacity because new coal forms all the time.

D
Solar energy technology has become too complex and decreased in capacity, while coal has also decreased in capacity because it is a limited resource.

Which of the following elements must be present on a fertilizer label?
iron
manganese
copper
potassium

In a​ poll, 1002 adults in a certain country were asked whether they favor or oppose the use of​ "federal tax dollars to fund medical research using stem cells obtained from human​ embryos." Based on the poll​ results, it is estimated that 46​% of adults are in​ favor, with a margin of error of 3 percentage points. Use the given statistic and margin of error to identify the range of values​ (confidence interval) likely to contain the true value of the population parameter

what is two plus two
​