Please help please help

Answer:

The three main types of coral reefs are fringing, barrier, and atoll. Schools of colorful pennantfish, pyramid, and milletseed butterflyfish live on an atoll reef in the Northwestern Hawaiian Islands. The most common type of reef is the fringing reef. This type of reef grows seaward directly from the shore.

Step-by-step explanation:

hopes this help

Answer:Hidden beneath the ocean waters, coral reefs teem with life. Fish, corals, lobsters, clams, seahorses, sponges, and sea turtles are only a few of the thousands of creatures that rely on reefs for their survival.

Coral reefs are also living museums and reflect thousands of years of history. Many U.S. coral reefs were alive and thriving centuries before the European colonization of the nearby shores. Some reefs are even older than our old-growth redwood forests. They are an integral part of many cultures and our natural heritage.

Today, these important habitats are threatened by a range of human activities. Many of the world’s reefs have already been destroyed or severely damaged by water pollution, overfishing and destructive fishing practices, disease, global climate change, and ship groundings. However, we can still protect and preserve our remaining reefs by acting now.

Step-by-step explanation: What i found

Answer:

1. college

2, salary

3. true experiment

4. 2

Step-by-step explanation:

1. in this scenario the independent variable is the college. that is  either walton college or non walton.

2. the dependent variable is the variable of interest. And this is salary. Students want to know what to major in that can give them a lot of salary when they start working.

3. This is a true experiment due to the random sample assigned.

4.  2 conditions to infer causation have been met.

Answer:

a) t = 2.2010

b) t = 1.7291

c) t = 3.4995.

Step-by-step explanation:

a. The sample size is 12 and the level of confidence is 95%.

12 - 1 = 11 degrees of freedom, either two-tailed test at [tex]\alpha = 0.975[/tex] or one-tailed test at [tex]\alpha = 0.95[/tex], so t = 2.2010.

b. The sample size is 20 and the level of confidence is 90%.

20 - 1 = 19 degrees of freedom, either two-tailed test at [tex]\alpha = 0.95[/tex] or one-tailed test at [tex]\alpha = 0.9[/tex], so t = 1.7291.

c. The sample size is 8 and the level of confidence is 99%.

8 - 1 = 7 degrees of freedom, either two-tailed test at [tex]\alpha = 0.995[/tex] or one-tailed test at [tex]\alpha = 0.99[/tex], so t = 3.4995.

Answer:

1. Yolanda's error is that the sample does not consist of all of Tichenor Middle School's students.

2. The sample size is 40 students. This is the sample size, because if you add up the amounts of students which voted for each animal, it adds up to 40.

Step-by-step explanation:

Answer:

5/51 or 9.8

Step-by-step explanation:

Since she does not put the marble back it's dependent.

1/3 chances the first marble is red and 5/17 the second is too.

Multiply and you get 5/51 odds, or approximately 9.8% chance

Answer:

1/9.

Step-by-step explanation:

Prob(First marble is red) = 6/18 = 1/3

Prob(Second marble is red) = 1/3

Required probability = 1/3 * 1/3 = 1/9.

Answer:

8,25

Step-by-step explanation:

Answer:

6 boxes

Step-by-step explanation:

HCF of 42 and 49 gives us 7.

So, 7 is the greatest number of boxes used if all cookies were packed.

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Answer:

The slope of the line that is perpendicular is 3/8

Step-by-step explanation:

The slope of the line through

(-6,4) (10,-2)

m = ( y2-y1)/(x2-x1)

    = ( 10 - -6)/( -2 -4)

    = (10+6)/(-2-4)

     = 16/-6

    =-8/3

A line perpendicular has a slope that is the negative reciprocal

- 1/( -8/3)

+ 3/8

The slope of the line that is perpendicular is 3/8

Answer:

the answer is 62.8cm^2

Step-by-step explanation:

4•3.14•5

By using the formula for the surface area of the sphere [tex]S.A = 4 \pi r^2[/tex], the surface area of this sphere would be, [tex]S.A = 314[/tex] cm²

Used the formula of the surface area of the sphere,

[tex]S.A = 4 \pi r^2[/tex]

Where 'r' is the radius of the sphere.

Given that,

Diameter of a sphere = 10 cm

We know that the radius of the sphere is half of the diameter of the sphere.

Hence, the radius of the sphere is,

[tex]r = \dfrac{10}{2}[/tex]

[tex]r = 5[/tex] cm

Substitute r = 5 cm in the above formula,

[tex]S.A = 4 \pi r^2[/tex]

[tex]S.A = 4 \times 3.14 \times 5^2[/tex]

Therefore, the surface area of a sphere is,

[tex]S.A = 314[/tex] cm²

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Answer:

D) 13 1/8

Step-by-step explanation:

105/8=13 1/8 cups

Hope this helped! :)

Answer:

..............=7(2)+3(4)

=14+12=26.................

Answer: y = 12x + 5

Step-by-step explanation:

Since the going rate is $12/hr, that will be the x coefficient. Since the starting fee is $5, that will be the y-intercept.

Answer: 640-720

Step-by-step explanation:

Answer:

1) c. 10

2) a. 1 and 18

3) d. 17

4) I think it's actually 12 but I don't know

Answer:

huh?

Step-by-step explanation:

Answer: C and the last choice.

Hope that helped! :)

Step-by-step explanation:

A- is not the answer because that is the formula for triangles.

B-Is not the answer because it's the formula for area

C-Is the formula for Volume so that an answer

D- Is the wrong answer when you solve the answer

E-Is the other answer because it is correct

Answer:

the answer is 55% are satisfied with the car

Answer:

I would go with third one down     3 1/2

Step-by-step explanation:

2 1/3 × 1 1/2

7/3 × 3/2   =  (7×3)/(3×2)

                 = 21/6

                 = 3 3/6

                 = 3 1/2

Answer:

a)x₁  = 24  business owners plan to provide a gift this year

b)  p-value = 0,0017

c)p-value < α   we have to eject H₀   And support the claim that the proportion of business owners providing gifts has decrease

Step-by-step explanation:

a) Sample size 80

proportion  p₁  = 30 %   p₁ = 0,3

Then   x₁ = 80*0,3

x₁  = 24  business owners plan to provide a gift this year

b) Hypothesis Test

Null Hypothesis                    H₀          p₁  =  0,45

Alternative Hypothesis        Hₐ          p₁  <  0,45

p₁  =  0,3   then  q₁  =  1  -  0,3    q₁ =  0,7

z(s)  = ( p₁  -  0,45 )/ √p₁* q₁ / n

z(s)  =  -  0,15 / √0,002625

z(s) = - 0,15 / 0,05123

z(s) = - 2,9279

b)From z-table we find  p-value = 0,0017

c) If  α = 0,05   ( significance level )  as

p-value < α   we have to eject H₀   And support the claim that the proportion of business owners providing gifts has decrease

Answer:

The answer is 0.25

Step-by-step explanation:

Answer:

The answer is c

Step-by-step explanation:

The missing term is YZ/BC = 6/3.

The correct option is A.

Those triangles look the same but are different in size.

And in similar triangles,

the corresponding sides are in proportion to each other and the corresponding angles are equal to each other.

Given:

The triangles ABC and XYZ are similar triangles by the SSS criterion.

And AB/XY = 4/2

AC/XZ = √52/√13

The missing ratio is YZ/BC = 6/3

It will complete the SSS criterion.

Therefore, YZ/BC = 6/3 is the missing term.

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The least common multiple is divisible by both a and b and it is the smallest positive integer divisible by both. The same food last for 4 girls will last 12 days.

The least common multiple that is divisible by both a and b is the smallest positive integer, lowest common multiple, or smallest common multiple of two numbers a and b, generally indicated by LCM.

The relationship between work and time is given by,

W = R × M × T

where W is the work, R is the rate of work, T is the time taken to do the work, and M is the number of people doing the work.

Given that 8 girls have enough food for 6 days. Therefore, the amount of food that a girl needs for a day is,

Amount of food that the girls need for a day = 1/(8×6) = 1/48

Now, if the same food is available then the time for which the food will last is,

[tex]\rm Time = \dfrac1{(4 \times \frac1{48})}[/tex]

         = 12 days

Hence, the same food last for 4 girls will last 12 days.

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Answer:

If x=0 then the answer is 20.

Step-by-step explanation:

Answer:

20

Step-by-step explanation:

6x0 = 0 so 20 plus 0 = 20 when x = 0 because x cancels out

Answer:

{13.7756,18.2244}

Step-by-step explanation:

Given the sample size, the margin of error can be calculated with the formula [tex]M=Z*\frac{\sigma}{\sqrt{n}}[/tex] where Z is the critical value for the desired confidence level, σ is the population standard deviation, and n is the sample size. Therefore, our margin of error for a 90% confidence level is:

[tex]M=Z*\frac{\sigma}{\sqrt{n}}=1.645*(\frac{8}{\sqrt{35}})=2.2244[/tex]

The formula for a confidence interval is [tex]CI=\bar{x}+M[/tex] where x-bar is the sample mean. Therefore, the 90% confidence interval for the mean amount of sushi pieces a person can eat is:

[tex]CI=\bar{x}\pm[M]=16\pm2.2244={13.7756,18.2244}[/tex]

Therefore, we are 90% confident that the true mean amount of sushi pieces a person can eat is contained within the interval {13.7756,18.2244}