7) A long piece of wire of length 90 cm is bent to form an equilateral triangle. What will be the length of each side of the triangle?​

Answer: The science teacher bought 4 rainforest posters and 2 ocean posters.

Step-by-step explanation: Let x be the number of rainforest posters and y be the number of ocean posters that the science teacher bought.

We know that the teacher bought 6 posters in total, so we have:

x + y = 6 (equation 1)

We also know that the cost of the 6 posters was $30, so we have:

5.5x + 4y = 30 (equation 2)

To solve for x and y, we can use either substitution or elimination method. Let's use the elimination method by multiplying equation 1 by 4 and subtracting it from equation 2:

5.5x + 4y = 30

-4x - 4y = -24

Simplifying, we get:

1.5x = 6

x = 4

Substituting x = 4 into equation 1, we get:

4 + y = 6

y = 2

Therefore, the science teacher bought 4 rainforest posters and 2 ocean posters.

The selling price of the 501 carat diamond rings is approximately $168,750.00, rounded to the nearest cent.

To find the selling price of the 501-carat diamond rings, we need to use the information given about the cost of the purchase and the markup percentage.

Let's assume the markup percentage is m. Then, the selling price S can be calculated as:

S = C * (1 + m/100)

where C is the cost of the purchase ($125,000 in this case).

If the markup percentage is not given, we can use another piece of information to calculate it. For example, if we know that the company wants to earn a profit of P dollars on the sale, we can set the equation:

S - C = P

and solve for the markup percentage:

m = (P/C) * 100

Assuming a markup percentage of 35%, we can calculate the selling price as:

S = 125,000 * (1 + 35/100)

S ≈ $168,750.00

Therefore, the selling price of the 501 carat diamond rings is approximately $168,750.00, rounded to the nearest cent.

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According to the information provided, the state is at point C, Michigan.

Based on the information provided, the state located at point C is Michigan.

Logical reasoning consists of aptitude questions that require logical analysis to arrive at a suitable solution. Most of the questions are conceptual, the rest are unconventional.

Logical thinking follows he is divided into two types.

Oral reasoning:

It is the ability to logically understand concepts expressed in words and solve problems. Oral reasoning tests your ability to extract information and meaning from sentences. Non-verbal thinking:

It is the ability to logically understand concepts represented by numbers, letters, and combinations of numbers and words and solve problems. Nonverbal reasoning tests your ability to reason and guide the logic and implications of information in a problem.

Much of the logic curriculum can be classified into his two types above. 

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The inequalities which the number lines represent are as follows;

x > 3

x <= 2.

A mathematical comparison and expression of the relationship between two expressions is known as an inequality.

It can be seen as a generalization of an equation and is denoted by a symbol like ">", "", "", or "".

In contrast to an equation, which only has one solution, an inequality may have several answers or none at all.

The values that give rise to an inequity are its remedies.

The range of potential values for a variable is one example of how inequality models limits or limitations in the real world.

They can also be used to describe how two variables relate to one another, such as when one is more than or less than the other.

According to our question-

the inequality is; x <= 2

the inequality is; x > 3

x > 3

x <= 2

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(a) The probability of at most 4 customers arriving in any given minute is 0.835.
(b) The probability of at least 3 customers arriving in an interval of 2 minutes is 0.668.

Step by step explanation:
(a) To find the probability of at most 4 customers arriving in any given minute, we need to use the Poisson Distribution formula: P(X ≤ x) = Σ (e-λ λk) / k!
where λ is the mean number of customers arriving in one minute, which is 1.5.
Therefore, P(X ≤ 4) = Σ (e-1.5 (1.5)k) / k! = 0.835.

(b) To find the probability of at least 3 customers arriving in an interval of 2 minutes, we need to use the same Poisson Distribution formula.
This time, λ = 3 (the mean number of customers arriving in two minutes).
Therefore, P(X ≥ 3) = 1 - Σ (e-3 (3)k) / k! (where k ranges from 0 to 2)
= 1 - (0.224 + 0.452 + 0.224) = 0.668.

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Answer:

The volume of a solid hemisphere with radius r is given by the formula:

V = (2/3)πr^3

In this case, the radius of the hemisphere is 2 cm. Substituting this value into the formula, we get:

V = (2/3)π(2 cm)^3

V = (2/3)π(8 cm^3)

V = (16/3)π cm^3

Therefore, the volume of the solid hemisphere is (16/3)π cubic centimeters.

Answer:

(16/3)π cm³ ≈ 16.76 cm³ (nearest hundredth)

Step-by-step explanation:

The volume of a solid hemisphere is given by the formula:

[tex]\boxed{V = \dfrac{2}{3}\pi r^3}[/tex]

where r is the radius of the hemisphere.

Substitute the given radius, r = 2 cm, into the formula, and solve for V:

[tex]\begin{aligned}\implies V &= \dfrac{2}{3}\pi(2)^3\\\\&= \dfrac{2}{3}\pi \cdot 8\\\\&= \dfrac{16}{3}\pi\; \sf cm^3\end{aligned}[/tex]

Therefore, the volume of the solid hemisphere of radius 2 cm is (16/3)π cm³ or approximately 16.76 cm³ (nearest hundredth).

Answer:

Step-by-step explanation: i hope this help if not let me know so i can fix it

The relationship between distance and travel time. It is not excessively strong or weak. In other words, the rate of change in journey time is moderate and constant with respect to distance.

positive negative moderate weak linear nonlinear relationship between distance and travel time can be described as follows:•

           Positive• Linear• Moderate

   Explain as we move from point A to point B, the distance covered and the travel time it takes to get there are positively correlated. As the distance increases, the travel time required to reach the destination also increases, resulting in a positive correlation.

          The relationship between distance and travel time is linear because the rate at which distance is covered remains constant, resulting in a straight-line relationship on a graph. It means that if distance doubles, the travel time will also double, indicating a linear relationship.

Hence, the linear relationship is also referred to as a direct relationship. On a graph, the line that represents the relationship between distance and travel time is moderate. This implies that the slope of the line is neither too steep nor too gentle.

               Thus, it is neither too strong nor too weak. In other words, the rate of change in travel time is consistent as distance changes, making it moderate.

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Therefore , the solution of the given problem of pie chart comes out to be  number of adults who selected math (15) outnumbered the number of minors. (10).

A pie chart, also referred to as a circle diagram, is a graphical representation of each of the values of a particular variable or a method to condense a collection of nominal data. (e.g. percentage distribution). A circle with many parts makes up this kind of chart. Each segment represents a particular group.

Here,

for a two-way table: Party A, Party B, and Party C

Men make up 12 8 % of the population while women make up 16 %.

Total            28        15         19

32 ladies make up the group, to start with.

b) 16 female voters plan to support Party A.

            Math, English, and science are studied by adults aged 15 to twenty-one and by children aged ten to ten.

Total          25         24          31

15 people selected math.

b) Reeshma is mistaken. The number of adults who selected math (15) outnumbered the number of minors. (10).

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The dimensions of the can of greatest volume that can be made with 150 square inches of tin are a radius of approximately 5.78 inches and a height of approximately 3.85 inches.

The dimensions of the soup can of greatest volume that can be made with 150 square inches of tin are given by the formula [tex]V = \pi r^2h[/tex], where V is the volume of the can, r is the radius of the base, and h is the height of the can. We can solve for the radius and height of the can using the given information.

Let the radius of the base be r and the height of the can be h. Then, the surface area of the can is given by the formula [tex]A = 2\pi rh + 2 \pi r^2[/tex]. We are given that the surface area of the can is 150 square inches, so we can write the equation [tex]2 \pi rh + 2 \pi r^2 = 150[/tex]. We need to find the dimensions of the can that maximize its volume, V. To do this, we can use the formula for the derivative of V with respect to r, which is [tex]dV/dr = 2 \pi rh + \pi r^2 dh/dr[/tex].

Setting this equal to zero and solving for h, we get [tex]h = -2r/3[/tex]. Substituting this into the equation for A, we get the equation [tex]2 \pi r(-2r/3) + 2 \pi r^2 = 150[/tex], which simplifies to [tex]-4 \pi r^2/3 + 2 \pi r^2 = 150[/tex]. Solving for r, we get [tex]r = 5.78[/tex] inches. Substituting this into the equation for h, we get [tex]h = -3.85[/tex] inches.

Since we cannot have a negative height, we must discard this value and take the positive value of h, which is approximately 3.85 inches. Therefore, the dimensions of the can of greatest volume that can be made with 150 square inches of tin are a radius of approximately 5.78 inches and a height of approximately 3.85 inches.

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Answer:

There are 5 vowels in the English alphabet: A, E, I, O, and U. Since repetition is allowed, each letter can be any one of the 5 vowels.

The probability of the first letter being a vowel is 5/26, since there are 5 vowels out of 26 letters in total. The probability of the second letter being a vowel is also 5/26, and so on for the third and fourth letters.

Since the events of each letter being a vowel are independent, we can use the multiplication rule to find the probability of all four letters being vowels:

P(all 4 vowels) = (5/26) x (5/26) x (5/26) x (5/26) = (5/26)^4

Using a calculator, we get:

P(all 4 vowels) ≈ 0.0023

To express the answer as a percent, we multiply by 100:

P(all 4 vowels) ≈ 0.23%

Therefore, the probability that all 4 letters typed will be vowels, with repetition allowed, is approximately 0.23%.

Step-by-step explanation:

The sum of the common ratios is 2.

A geometric sequence is a sequence of numbers where each term is obtained by multiplying the previous term by a fixed number called the common ratio.

Let the common ratio of the first sequence be denoted by r₁ and the common ratio of the second sequence be denoted by r₂. Then we have:

a₂ = kr₁, a₃ = kr₁²

b₂ = kr₂, b₃ = kr₂²

Substituting these expressions into the given equation,

(a₃ - b₃) = 2(a₂ - b₂)

we get:

kr₁² - kr₂² = 2(kr₁ - kr₂)

Dividing both sides by k (since k is non-zero), we get:

r₁² - r₂² = 2(r₁ - r₂)

We can factor the left-hand side using the difference of squares formula:

(r₁ - r₂)(r₁ + r₂) = 2(r₁ - r₂)

Dividing both sides by (r₁ - r₂) (since r₁ ≠ r₂), we get:

r₁ + r₂ = 2

Therefore, the sum of the common ratios of the two sequences is 2.

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Answer:

A survey found that 34% of the students spend time with your family eating dinner. Oh the 500 student surveyed, about how many spend time with their family eating dinner?

Step-by-step explanation:

If 34% of the students surveyed spend time with their family eating dinner, we can find the approximate number of students who do so by multiplying the percentage by the total number of students surveyed:

34% of 500 students = 0.34 x 500 = 170 students

Therefore, about 170 of the 500 students surveyed spend time with their family eating dinner.

If you can, give me brainliest please!

We can use the formula:

Work = Rate x Time

Let's assume that the amount of work involved in cleaning the hall is the same regardless of the number of people doing the job. Therefore, the amount of work done by 5 people in 4 hours is the same as the amount of work done by 8 people in t hours, where t is the time taken by 8 people to clean the hall.

We can set up an equation based on this:

5 people x 4 hours = 8 people x t hours

Simplifying this equation, we get:

20 = 8t/5

which implies, t = 25/8

Therefore, it will take 25/8 hours or 3 hours and 7.5 minutes for 8 people to clean the hall at the same rate as 5 people.

I hope it helped you and MARK ME AS THE BRAINLIEST!

1. The volume of water in the tank before the valve is opened is 9362 cubic meters. 2. It takes 151 hours for the tank to fully empty.

Modeling is the process of representing and analyzing real-world events using mathematical ideas and methods. It is a crucial component of mathematics because it enables systematic, quantitative prediction, problem-solving, and understanding of complicated processes.

We may learn about the behavior of systems, test hypotheses, and arrive at wise conclusions by using mathematical models. We may use models to enhance processes, forecast results, and discover key factors.

The equation of the volume is given as V = 62(151 - t).

At t= 0 we have the volume as:

V = 62(151 - 0) = 9362 cubic meters

To empty the tank we take V = 0:

0 = 62(151 - t)

151 - t = 0

t = 151

Hence, the volume of water in the tank before the valve is opened is 9362 cubic meters and it takes 151 hours for the tank to fully empty.

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The vector space of polynomials of degree at most two that satisfies the constraint is given by the span

{1 + x + x², 1 - x + x²}.

To find a basis for the given vector space, we first determine the dimensions of the space.

The vector space of polynomials of degree at most two is of the form:

p(x) = a + bx + cx²

This vector space contains infinitely many vectors because it is a function space.

The constraint p(1) = 1 + 2a + b + c = 0 means that the dimension of the subspace is two rather than three.

Next, we will obtain a basis for the vector space of polynomials of degree at most two that satisfy the constraint:

span{1, x - 1, x(x - 1)} is a basis for the subspace of the vector space that satisfies the constraint.

To find the basis for the subspace, we can use the definition of a basis.

A basis is a set of vectors that spans the subspace, and that are linearly independent.

We must demonstrate that this basis spans the subspace and that it is linearly independent.

If p(x) = a + bx + cx² satisfies the constraint p(1) = 0, then we have

1 + 2a + b + c = 0, which means a = (-b - c + 1)/2.

Then p(x) = (-b - c + 1)/2 + bx + cx².

Now, we find a basis for the subspace that satisfies the constraint by selecting vectors and demonstrating that they are linearly independent.

span{1, x - 1, x(x - 1)} is a basis for the subspace because they are linearly independent and span the subspace.

Span{1, x - 1, x(x - 1)} spans the subspace because any polynomial in the subspace can be expressed as a linear combination of the elements of the basis.

1 = (1/2) (1 + x - x(x - 1) - x + x(x - 1)) = (1/2)(1 - x²)x - 1 = x - 1x(x - 1) = x² - x

Since the coefficients of 1, x - 1, and x² - x are unique, the three polynomials are linearly independent, so they form a basis.

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Answer:

When a point is reflected over the x-axis, the x-coordinate remains the same, but the y-coordinate is multiplied by -1.

So, the coordinates of X' are (9, -5) since the x-coordinate remains the same and the y-coordinate is multiplied by -1.

Similarly, the coordinates of Y' are (-3, -6) and the coordinates of Z' are (-8, -4).

Therefore, X′ is (9,−5), Y′ is (−3,−6), and Z′ is (−8,−4).

Considering the tangent-secant theorem, the value of x is given as follows:

x = 55º.

The secant-tangent theorem states that when a tangent and a secant line intersect at a point outside a circle, the measure of the angle of intersection is given by half the difference between the arc length of the far arc by the arc length of the near arc.

Hence the equation is given as follows:

y = (far arc - near arc)/2.

The parameters for this problem are given as follows:

Then, applying the theorem, the value of x is given as follows:

x = (145 - 35)/2

x = 55º.

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Answer:For the first 40 hours, Mr. Smith earned:

$23.20/hour × 40 hours = $928.00

For the additional 11.5 hours, he earned:

$23.20/hour × 1.5 = $34.80/hour

So, for these hours, he earned:

$34.80/hour × 11.5 hours = $400.20

Adding these amounts together, we get:

$928.00 + $400.20 = $1,328.20

Therefore, Mr. Smith earned $1,328.20 last week.

Step-by-step explanation:

It has been established that the manufacturer is legal.

The test statistic is 13

The p-value is 0.

a. Formulate the hypotheses:

The hypotheses for this test are:

H  0: μ ≤ 50

H  a: μ > 50.

b. test statistic:

The test statistic will be a t-test because we do not know the population standard deviation.

Since this is a one-sided test, we will use a one-sample t-test.

The test statistic can be calculated using the formula below:

Substituting these values into the formula gives:

t = (51.5 - 50) / (4 / √64)

t = 6.5 / 0.5

t = 13

The test statistic is 13.

c. When the p-value associated with the sample results, using a t-distribution table with 63 degrees of freedom (64 - 1), we find that the p-value associated with a t-statistic of 13 is 0.

Therefore, we can reject the null hypothesis and conclude that the manufacturer's advertising is permitted.

The sample provides sufficient evidence to show that the new small cars average more than 50 miles per gallon of gasoline.

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The logarithmic expression given as log(15) -log(3) when simplified is log(5).

Given that

log(15) -log(3)

The form is

log(c)

Using the logarithmic identity that states log(a) - log(b) = log(a/b), we can rewrite the given expression as:

log(15) - log(3) = log(15/3)

And simplifying the expression inside the logarithm, we get:

log(15) - log(3) = log(5)

So the given expression, log(15) - log(3), can be written in the form log(c) as log(5).

This means that the logarithm of 5 is equivalent to the difference between the logarithms of 15 and 3.

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Using the law of indices, the values of the unknown are 1/2, -2/3, -3, 1, 10, 0, 7/12, and -4/17

To solve these problems, we need to apply the laws of indices to the question as required.

11. 10⁻³ˣ * 10ˣ = 1/10

using multiplication law of indices;

x = 1/2

12. 3⁻²ˣ ⁺¹ * 3⁻²ˣ ⁻³ = 3⁻ˣ

x = -2/3

13. 4⁻²ˣ * 4ˣ = 64

x = -3

14. 6⁻²ˣ * 6⁻ˣ = 1/216

x = 1

15. 2ˣ * 1/32 = 32

x = 10

16. 2^(-3p) * 2^(2p) = 2^(2p)

p = 0

17. 64 * 16⁻³ˣ = 16³ˣ⁻²

x = 7/12

18. 81^(3n + 2) / 243^(-n) = 3^4

n = -4/17

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the volume of the solid is [tex]V = π r2 (sqrt(3/4)r) / 3 = π r3 sqrt(3/4) / 3.[/tex]

Plugging in the given values, we get[tex]V = π (3)3 sqrt(3/4) / 3 = 27π/4.[/tex]

The volume of a solid with a circular base and cross sections taken parallel to one of the diameters that are equilateral triangles can be found using the slicing method. The formula for the volume of such a solid is:[tex]V = π r2 h/3,[/tex]where π is the constant pi, r is the radius of the circular base, and h is the height of the solid.

In this case, the radius of the circular base is 3 and the height is equal to the length of the sides of the

equilateral triangles. To find the height, we can use the Pythagorean Theorem. The hypotenuse of the triangle is 2r, so the length of the sides is sqrt(r2 - (r/2)2), which simplifies to sqrt(3/4)r.

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Answer:

[tex]\large\boxed{\mathtt{C=100 \pi \ in.}}[/tex]

[tex]\large\boxed{\mathtt{C \approx314.16 \ in.}}[/tex]

Step-by-step explanation:

[tex]\textsf{We are asked for the circumference of this circle.}[/tex]

[tex]\textsf{Let's review what the Circumference of a circle actually is.}[/tex]

[tex]\large\underline{\textsf{What is the Circumference?}}[/tex]

[tex]\textsf{The Circumference is is the length 'on' the circle.}[/tex]

[tex]\textsf{Circumference is the Perimeter of the Circle; The sum of all the curved edges.}[/tex]

[tex]\large\underline{\textsf{How do we find the Circumference?}}[/tex]

[tex]\textsf{To find the Circumference, we should use a common, and simple formula.}[/tex]

[tex]\mathtt{Circumference=(Diameter) \pi}[/tex]

[tex]\textsf{Pi will be multiplied by the Diameter of the Circle.}[/tex]

[tex]\textsf{Because we are given the Diameter, we can start solving for x.}[/tex]

[tex]\large\underline{\textsf{Substitute;}}[/tex]

[tex]\mathtt{Circumference \ (C)=(100 \ in.) \pi}[/tex]

[tex]\large\boxed{\mathtt{C=100 \pi \ in.}}[/tex]

[tex]\large\boxed{\mathtt{C \approx314.16 \ in.}}[/tex]

Answer: 6(x+2)(x-5)

Step-by-step explanation:

1: Factor by grouping- A 6 can be distributed in all 3 terms, when we do this we get 6(x²-3x-10).

2: This is in the form 6(x²+bx+c). So, to continue factoring, just forget about the six for a while and find two factors of c that add up to b. These two factors are -5 and 2.

3: Fill in the blanks with either factor. (x+?)(x+?) We get (x+2)(x-5).

4: Bring back the 6 to the beginning of the equation to get a final answer of 6(x+2)(x-5).

2+1=3 is the solution to the differentiation equation.

A differential equation is an equation that explains a function's unknown derivative or derivatives. Take the equation, for example. The expression d y d x = x sin expresses the derivative of an unknown function.

Chain rule evaluation of the derivative on the left hand side yields the following results:

[tex]dxd​ {( dxdy​ ) 3 } =0. ⇒3( dxdy​ ) 2 dx 2 d 2 y​ =0[/tex]

Because the highest order derivative that appears in the equation is second order, the order of this differential equation is 2.

Its highest order derivative's power is the degree. Degree in this instance is 1.

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(a) The hypothesis that the mean inside bearing diameter is 8. 25 cm is 6.78.

(b) The  p value is zero because if we observe a sample that is unlikely to fall below zero (if the statistician can detect it, we can get a p-value of exactly zero.

(c) At 95% two-sided confidence interval on the mean bearing diameter is 8.2527 or 8.2543.

Hypothesis:

Hypotheses (plural hypotheses) are proposed explanations for phenomena. For a hypothesis to be a scientific hypothesis, the scientific method requires that it can be tested. Scientists often base scientific hypotheses on past observations that cannot be satisfactorily explained by existing scientific theories. Although the words "hypothesis" and "theory" are often used interchangeably, a scientific hypothesis is not the same as a scientific theory. A working hypothesis is a tentatively accepted hypothesis that is proposed for further research in a process that begins with an educated guess or idea.

(a) The hypothesis that the mean inside bearing diameter is 8. 25 cm. By Using the two sided alternative:

H₀= 8.25

H₁ ≠ 8.25

Z = X - 8.25÷ sd/√π

  = x - 8.25÷ 0.002/3.14

  = 6.78 > 1.96 (CV)

(b) the P-value for this test is:

p( value) = 0

because if we observe a sample that is unlikely to fall below zero (if the statistician can detect it, we can get a p-value of exactly zero.

(c) X ± Zᵃ ÷ sd/√π

  = 8.2527 or 8.2543

At 95% two sided confidence interval on the mean bearing diameter is 8.2527 or 8.2543.

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The index of the middle element is 4.

The list (0, 1, 1, 2, 3, 5, 8, 13, 17), the binary search algorithm calls Binary Search (list, 0, 8, 3). The index of the middle element is 4. The binary search algorithm works by dividing a list into halves and looking at the value in the middle of the list. This is compared with the target value, and based on the comparison, one-half of the list is discarded as the search is continued in the other half. This is continued until the target value is found or it is clear that it is not on the list. In the given case, the list is (0, 1, 1, 2, 3, 5, 8, 13, 17), and the algorithm calls Binary Search(list, 0, 8, 3).

Here, the first parameter of the Binary Search function is the list, the second parameter is the lower index of the part of the list being searched, the third parameter is the upper index, and the fourth parameter is the value being searched. In the given case, the lower index is 0, the upper index is 8, and the value being searched is 3. The index of the middle element in the list is calculated as (0 + 8) / 2 = 4.

Therefore, the index of the middle element is 4.

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The zero vector: The zero vector 0 = [0,0;0,0;0,0] is also a member of W. Thus, the third criterion is satisfied.

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