At school 220 of the 380 students attend d the school dance which statement shows the values that are all equivalent to the fraction of students that attended the dance

The radius that can be traced with that opening will be 10.14cm

Given that arms of a compass, measure 12 cm, form an angle of 50 degrees, we need to find the radius of the circumference that can be drawn with that opening,

using the cosine theorem:

Assume that the compass forms a triangle, where sides c and b measure 12cm, we want to find outside a (which would be the radius sought), we have an angle that would be angle A.

Then the cosine theorem says:

a² = b² + c² - 2·b·c·cosA

a² = 12² + 12² - 2·12·12·cos50

a² = 102.88 (approximately)

a = 10.14cm (approximately)

Hence, the radius that can be traced with that opening will be 10.14cm

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The complete question :-

los brazos de un compas, miden 12 cm, forman un angulo de 50 grados ¿ cual es el radio de la circunferencia que puede trazarse con esa abertura?

The translation :-

The arms of a compass, measure 12 cm, form an angle of 50 degrees What is the radius of the circumference that can be drawn with that opening?

So the order from left to right would be: Mode, Median, Mean.

In a positively skewed distribution, the mean is typically larger than the median, and the median is larger than the mode.

This can be illustrated in the following way:

Mean: The mean is affected by extreme values in the tail of the distribution, and will be pulled in the direction of the skew. Therefore, in a positively skewed distribution, the mean will be to the right of the median.

Median: The median is the value that separates the lower 50% of the data from the upper 50% of the data. In a positively skewed distribution, the tail of the distribution is on the right-hand side, which means that the median will be closer to the left-hand side than the mean.

Mode: The mode is the most frequent value in the distribution. In a positively skewed distribution, the mode will be the smallest value, located at the left-hand side of the distribution, while the mean and median will be to the right of it.

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Answer:

woman,man,woman,man,woman,man,woman,man,woman,man,man,man,man

Step-by-step explanation:

too easy

In the classical or direct approach, we compare the t-statistic from our experiment to the critical value from the t-distribution table. If the t-statistic is greater than the critical value, we reject the null hypothesis.

We cannot infer our results from the general population unless we have a representative sample. Even with a representative sample, there is always the potential for bias. To avoid bias, we can use random sampling and blind or double-blind experimental designs.

To improve on this experiment, we could increase the sample size to reduce sampling error and increase the power of the experiment. We could also use a control group to compare our results to a group that did not receive the treatment. Additionally, we could use a different statistical test or model to analyze the data or gather more variables to control for potential confounding factors.

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We say that there are n-1 degrees of freedom in this case.

The number of values free to vary after certain restrictions have been placed on the data is the definition of degrees of freedom (df). Degrees of freedom are a key concept in inferential statistics and are often used in hypothesis testing and the calculation of confidence intervals. In essence, degrees of freedom represent the number of values in a data set that are free to vary after the mean has been calculated.

For example, if we have a sample of n observations and we know the mean of the sample, then we can calculate the sum of the n observations. However, we cannot set the value of the last observation, as it is determined by the values of the first n-1 observations and the mean. Therefore, we say that there are n-1 degrees of freedom in this case.

Degrees of freedom are also important in the calculation of standard errors, t-tests, and F-tests. In these cases, the degrees of freedom reflect the amount of information in the sample and are used to calculate the probability of observing a particular test statistic under the null hypothesis.

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Answer:

290 degrees

Step-by-step explanation:

To find the length of the major arc subtracts 360-70.

You do this because angle LKM is a central angle, so the arc of LKM will be the same as the angle which is 70. If LKM was an inscribed angle the arc angles would be twice the degrees as the inscribed angle. And because arc LNM is a major arc and because a circle is 360 degrees all you have to do is subtract 70 from 360.

The image below shows an inscribed angle and a central angle.

The demand function relating unit price, p(x), to the quantity demanded, x, is: P(x) = -7x^2 + 8x + 15

(a) To determine the revenue function, we need to integrate the marginal revenue function R"(x).

R'(x) = -21x^2 + 16x + 15

Integrating R'(x) gives us the revenue function:

R(x) = -7x^3 + 8x^2 + 15x + C

where C is the constant of integration. Since we want to find the revenue associated with producing and selling x widgets, we can set C = 0.

Therefore, the revenue function associated with producing and selling x widgets is:

R(x) = -7x^3 + 8x^2 + 15x

(b) To determine the demand function, we need to use the inverse demand method.

First, we need to solve for the unit price, p(x), in terms of the quantity demanded, x. We know that revenue, R(x), is equal to the product of the unit price, p(x), and the quantity demanded, x:

R(x) = p(x) * x

Substituting the revenue function we found in part (a), we get:

-7x^3 + 8x^2 + 15x = p(x) * x

Solving for p(x), we get:

p(x) = (-7x^2 + 8x + 15)

Therefore, the demand function relating unit price, p(x), to the quantity demanded, x, is:

P(x) = -7x^2 + 8x + 15

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Answer:

I am to lazy for that right now:>

To locate the discontinuities of the function y = ln(tan^2x), we need to find the values of x where the function is not continuous.

First, let's consider the domain of the natural logarithm, ln(x). It is defined only for positive values of x, so tan^2x must be greater than 0 for the function to be defined.

Next, let's consider the domain of tan(x). Tan(x) is undefined when its denominator, cos(x), is equal to 0. This occurs at x = (2n + 1)π/2, where n is an integer.

Since we have tan^2x, the square of tan(x) will always be non-negative. However, we need it to be positive (greater than 0) for ln(tan^2x) to be defined. Tan^2x will be equal to 0 when tan(x) is 0, which occurs at x = nπ, where n is an integer.

Thus, the discontinuities of the function y = ln(tan^2x) occur at two different sets of x values:

1. x = (2n + 1)π/2, where n is an integer, due to the undefined nature of tan(x).
2. x = nπ, where n is an integer, due to tan^2x being 0, which is not in the domain of ln(x).

There are infinitely many discontinuities because of the variable n.

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Other than translation, the other transformation used to create this frieze pattern is:

A 180-degree rotation is a transformation wherein an object or shape obtains a spin of half a full circle, indulging in the metamorphosis of facing the total opposite direction.

To demonstrate this more accurately, each point on the object must transition to a placement that is precisely polar to its primary site; centered by a fixed spot recognized as the axis of revolution.

A close examination of the pattern shows that it is not a reflection, hence making all the options of reflection unsuitable

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Answer:

53.93 cm

Step-by-step explanation:

The given arc is 38.95 and the angle is 260 degrees.

A full angle would be 360 degrees, so we can use a ratio to find what the full circle would be:  

260/360 = 38.95/x

This equation is saying that 38.95 is equal to 260 degrees of the circle, while x is equal to 360 degrees.

Solving for x:

260x = 14022

x = 53.9306792

Round and it is:

53.93 cm

In a standard deck of cards, there are 13 cards of each suit: hearts, spades, clubs, and diamonds. A bridge hand consists of 13 cards selected at random and without replacement. To calculate the probability of being dealt a hand that does not contain a heart, we need to find the total number of possible hands and the number of hands without any hearts.

There are 52 cards in total, but we're only interested in the 39 cards that are not hearts (13 spades, 13 clubs, and 13 diamonds). The number of ways to choose 13 cards from these 39 is calculated using combinations, denoted as C(n, r), where n is the total number of items and r is the number of items to choose. In this case, it's C(39, 13).

C(39, 13) = 39! / (13! * (39-13)!) = 8,122,425

Next, we need to find the total number of possible bridge hands, which is choosing 13 cards from a 52-card deck:

C(52, 13) = 52! / (13! * (52-13)!) = 635,013,559,600

Now, we can find the probability of a hand without any hearts by dividing the number of hands without hearts by the total number of possible hands:

Probability = (number of hands without hearts) / (total number of possible hands)
Probability = 8,122,425 / 635,013,559,600 ≈ 0.0128

Therefore, the probability of being dealt a hand that does not contain a heart is approximately 0.0128 or 1.28%.

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Answer:

Step-by-step explanation:

First get y byitself to oneside

[tex]2x-y\leq 5[/tex]

Subtract -2x to bothside

[tex]-y\leq 5-2x[/tex]

Divide -1 to make y positive. Dividing or Multiplying changes direction.

[tex]y\geq 2x-5[/tex]

y >= any value above the positive of the line.

The following statement "If a regression model has high bias, it is unlikely that collecting more data to train/build the model will increase its performance on a validation or test set" is absolutely true.

If a regression model has high bias, it means that it is oversimplified and unable to capture the complexity of the data. Collecting more data may not necessarily improve the model's performance on a validation or test set because the model is already too simple to effectively model the data. In fact, increasing the amount of data may actually make the bias worse by further emphasizing the oversimplified nature of the model. To improve the performance of a model with high bias, it is usually necessary to use a more complex model or introduce additional features to the model.

If a regression model has high bias, it means the model is oversimplified and does not capture the underlying patterns in the data. Collecting more data to train/build the model is unlikely to increase its performance on a validation or test set in terms of SSE (Sum of Squared Errors), MSE (Mean Squared Error), or R2 (R-squared) because the model's simplicity prevents it from learning the necessary complexity to accurately represent the data. To improve the model's performance, it's important to consider reducing the bias by using more complex models or incorporating additional features.

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The probability of outcomes in the sample space for the different ways cards can be chosen is 625.

To find the total number of outcomes in the sample space, we need to multiply the number of outcomes for the first card selection by the number of outcomes for the second card selection.

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There are 64 boards in the stack.

To find the number of boards in the stack, we need to divide the total height of the stack by the thickness of each board.

Since each board is 3/8 of an inch thick, we can write:

Number of boards = Total height of stack ÷ Thickness of each board

Number of boards = 24 inches ÷ (3/8) inches

Number of boards = 24 inches × (8/3)

Number of boards = 64

Therefore, there are 64 boards in the stack.

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Answer: This problem involves sampling from a binomial distribution, where the probability of success (i.e., being a minority employee) is p = 0.25, and the sample size is n = 7.

a. The probability that the sample contains exactly 4 minorities can be calculated using the binomial probability formula:

P(X = 4) = (7 choose 4) * 0.25^4 * 0.75^3

where (7 choose 4) = 35 is the number of ways to choose 4 employees out of 7.

Evaluating this expression gives:

P(X = 4) = 35 * 0.25^4 * 0.75^3 = 0.1318

Therefore, the probability that the sample contains exactly 4 minorities is approximately 0.1318.

b. The probability that the sample contains fewer than 2 minorities can be calculated as the sum of the probabilities of getting 0 or 1 minority:

P(X < 2) = P(X = 0) + P(X = 1)

Using the binomial probability formula again, we get:

P(X = 0) = 0.75^7 = 0.1335

P(X = 1) = (7 choose 1) * 0.25^1 * 0.75^6 = 0.3232

where (7 choose 1) = 7 is the number of ways to choose 1 employee out of 7.

Therefore,

P(X < 2) = P(X = 0) + P(X = 1) = 0.1335 + 0.3232 = 0.4567

So the probability that the sample contains fewer than 2 minorities is approximately 0.4567.

c. The probability that the sample contains exactly 1 non-minority can be calculated using the complement rule:

P(X = 1) = 1 - P(X = 0) - P(X > 1)

where P(X > 1) is the probability of getting 2 or more minorities, which can be calculated as:

P(X > 1) = 1 - P(X = 0) - P(X = 1) = 1 - 0.1335 - 0.3232 = 0.5433

Therefore,

P(X = 1) = 1 - P(X = 0) - P(X > 1) = 1 - 0.1335 - 0.5433 = 0.3232

So the probability that the sample contains exactly 1 non-minority is approximately 0.3232.

d. The expected number of minorities in the sample can be calculated using the formula:

E(X) = n * p = 7 * 0.25 = 1.75

Therefore, the expected number of minorities in the sample is 1.75.

Based on the calculations:

a. The probability that the sample contains exactly 4 minorities is 0.00015625 or approximately 0.0156.

b. The probability that the sample contains fewer than 2 minorities is 0.01435 or approximately 0.0144.

c. The probability that the sample contains exactly 1 non-minority is 0.322102 or approximately 0.3221.

d. The expected number of minorities in the sample is 1.75.

Therefore, the correct options are:

a. The probability that the sample contains exactly 4 minorities is approximately 0.0156.

b. The probability that the sample contains fewer than 2 minorities is approximately 0.0144.

c. The probability that the sample contains exactly 1 non-minority is approximately 0.3221.

d. The expected number of minorities in the sample is 1.75.

There were 20 mens that classified as supertasters.

We will use the unitary method which is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.

we have been told that the number of women was 3.25 times the number of men. Therefore,

Number of women = 3.25 m

Since there are 65 women, the number of men will be:

3.25 m = 65

Men = 65/ 3.25

Men = 20

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∠DEF ≅ ∠ DGF is the additional information that needed.

To prove that ΔDEF ≅ ΔDGF by SAS, we need to show that:

The included angle ∠EDF is congruent to the included angle ∠GDF (S in SAS).

The sides DE and DG are the same lengths (S in SAS).

Triangle DEF is shown to be mirrored across DF to form triangle EGF, while sides EF and FG are shown to have the same lengths. This reveals to us:

∠DEF ≅ ∠DGF (corresponding angles of congruent triangles are congruent)

EF ≅ FG (given)

However, we do not know whether DE ≅ DG, which is necessary for the second part of the proof. Therefore, the additional information needed to prove that ΔDEF ≅ ΔDGF by SAS is that DE ≅ DG.

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The expression that is equivalent to 4⁴·4⁻⁹ is found to be 4⁻⁵. Hence option D is correct.

When multiplying exponential expressions with the same base, you add their exponents.

So, 4⁴⋅4⁻⁹ can be written as:

4⁴⁻⁹ = 4⁻⁵

Now, we know that a negative exponent means taking the reciprocal of the base raised to the positive exponent. Therefore,

4⁻⁵ = 1/4⁵

So, the expression 4⁴⋅4⁻⁹ is equivalent to the fraction 1 over 4 to the power 5. Therefore, the answer is 4⁻⁵.

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Complete question - Which expression is equivalent to 4⁴·4⁻⁹?

A. 4^13

B. 4^5

C. 4^-13

D. 4^-5

Answer:

[tex]\frac{3x^{2} }{10}[/tex]

Step-by-step explanation:

[tex]\frac{3x}{2}[/tex] x [tex]\frac{x}{5}[/tex] = [tex]\frac{3x^{2} }{10}[/tex]

So, the answer is  [tex]\frac{3x^{2} }{10}[/tex]

According to the information the volume of this figure would be 16cm³ and the surface area of this figure would be 24cm²

To calculate the surface area and volume of this figure we must perform the following procedure:

Volume:

Multiply height, width and length

2cm * 2cm *2cm = 16cm³

Surface area:

Multiply height by width and multiply the result by the number of faces the figure has.

2cm * 2cm = 4cm²

4cm² * 6 = 24cm²

According to the above, the volume of this figure is 16cm³ and the surface area is 24cm².

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The most appropriate graphical representation for the grams of fiber from 1,000 different breakfast cereals sold in the United States is; Histogram, because there is a large set of data.

Since histogram is a graphical representation of the distribution of numerical data. This is consist of a series of adjacent rectangles, or bins, that are used to represent the frequency distribution of the data. The height of each bin corresponds to the number of data points that fall within a particular range or interval.

Hence, we have that each bin will represent the number of observations in an interval of grams of fiber.

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Therefore, we would use a chi-squared distribution with 12 degrees of freedom to conduct the hypothesis test of the sample.

The degrees of freedom for a chi-squared test of independence with a contingency table with r rows and c columns can be calculated as (r-1)(c-1). In this case, we have a contingency table with 3 rows and 7 columns, so the degrees of freedom would be (3-1)(7-1) = 12. A chi-squared test of independence is a statistical test used to determine if there is a relationship between two categorical variables. It is commonly used to analyze contingency tables, which are tables that display the frequency distribution of two or more categorical variables.

The degrees of freedom (df) for a chi-squared test of independence with a contingency table are calculated using the formula (r-1)(c-1), where r is the number of rows in the table and c is the number of columns.

In this case, we have a contingency table with 3 rows and 7 columns. Therefore, r = 3 and c = 7.

Substituting these values into the formula, we get:

df = (r-1)(c-1)

= (3-1)(7-1)

= 2 x 6

= 12

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Answer:

1729.

Step-by-step explanation:

Hope this helped!

The calculations, we get Var[Yn] = 0.162962963. Given that the input to a digital filter is a random sequence with E[Xi] = 3 and auto-covariance function X-1' Xo, X1, with k = 0 Cx(m,k) = Cov( Xm, Xmtk) = 0.9 Ikl =1 otherwise smoothing filter produces the output sequence: Xn + Xn-1 + Xn-2 Yn = 3.

(a) E[YN] = 3, as the filter is a smoothing filter, and the output is a linear combination of the input with constant coefficients, and the expected value of the input is 3, the expected value of the output will also be 3.

(b) Var[Yn] = 0.162962963, we can use the formula for the variance of a linear combination of random variables: Var[aX + bY] = a^2Var[X] + b^2Var[Y] + 2abCov[X,Y]. In this case, a = b = 1/3 and X = Xn, Y = Xn-1 + Xn-2. Using the auto-covariance function, we can compute the covariance between Xn and Yn-1, and Xn and Yn-2, and substitute them into the formula to get the variance of Yn.

After doing the calculations, we get Var[Yn] = 0.162962963.

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To find the surface area of the sphere with a unit cube inscribed, we first need to determine the radius of the sphere. A unit cube has side length 1, and its vertices are at a distance of 1 unit from each other. Since all eight vertices of the cube are on the sphere, we can consider the longest diagonal of the cube to calculate the diameter of the sphere.

The longest diagonal of the cube can be calculated using the Pythagorean theorem in three dimensions: the square of the diagonal (d²) is equal to the sum of the squares of the side lengths (a² + b² + c²), where a, b, and c are the side lengths of the unit cube. In this case, a = b = c = 1. So, d² = 1² + 1² + 1² = 3. Thus, d = √3.

The diameter (d) of the sphere is equal to the longest diagonal of the cube. Therefore, the radius (r) of the sphere is half of the diameter: r = d/2 = √3/2.

Now that we have the radius, we can calculate the surface area (A) of the sphere using the formula: A = 4πr². Plugging in the radius, we get:

A = 4π(√3/2)² = 4π(3/4) = 3π.

So, the surface area of the sphere is 3π square units.

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Based on the definition of vertical angles, the value of x is calculated as: x = 16.

When two lines that are straight intersect each other at a point, they form two pairs of opposite angles which are referred to as vertical angles. These angles called vertical angles are congruent to each other.

We are given:

m∠A = (7x − 24)°

m∠B = (5x + 8)°

Given that angle A and angle B are vertical angles, therefore:

7x - 24 = 5x + 8

Combine like terms:

7x - 5x = 24 + 8

2x = 32

x = 16

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The volume of the sphere given to the nearest tenth is 329,167.37 cubic millimeters.

surface area of the sphere = 23,047 square millimeters

Surface area of a sphere = 4πr²

23,047 = 4 × 3.14 × r²

23,047 = 12.56r²

divide both sides by 12.56

r² = 23,047 / 12.56

r² = 1834.952229299363

Find the square root of both sides

r = √1834.952229299363

r = 42.84 millimeters

Volume of a sphere = 4/3πr³

= 4/3 × 3.14 × 42.84³

= 4/3 × 3.14 × 78,622.778304

= 987,502.09549824 / 3

= 329,167.36516608

Approximately,

Volume = 329,167.37 cubic millimeters

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Using normal distribution, we can expect 26% of Tim Worker's electric bill expenses to fall between $184.00 and $200.00.

Tim Worker's electric bill to calculate the percentage of his expenses in this category that would be expected to fall between $184.00 and $200.00.

Calculate the z-scores for $184.00 and $200.00 using the formula z = (x - μ) / σ, where x is the value we are interested in, μ is the mean, and σ is the standard deviation.

For $184.00: z = ($184.00 - $206.00) / $10.00 = -2.2

For $200.00: z = ($200.00 - $206.00) / $10.00 = -0.6

Look up the percentage of the area associated with each z-score using a standard normal distribution table or a calculator that can calculate normal probabilities.

For z = -2.2: 48.6%

For z = -0.6: 22.6%

Subtract the percentage of the area associated with the lower z-score from the percentage of the area associated with the higher z-score to get the percentage of expenses between $184.00 and $200.00.

Percentage between $184.00 and $200.00 = 48.6% - 22.6% = 26%

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