Kaelyn has 14 coins that have a value of $1.20 she only has dimes and nickels how many nickels does kaelyn have ?

Answer:

24%

Step-by-step explanation:

please mark me brainiest hope this helps

The percentage of the shape that is orange is 24%.

To get the percentage of the shape that is orange, we need to find the quotient between the number of orange squares and the total number of squares, and multiply that by 100%.

Then the percentage of the shape that is orange is:

P = (12/50)*100% = 24%

Then we can conclude that 24% of the shape is orange.

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In the question, the independence assumption may have been violated, while the Nearly Normal Condition is likely justified. Therefore, the use of the Student-t model for inference may be unreliable.

a) In order to perform a hypothesis test on the claim made by the diet guide, we need to assess the assumptions and conditions required for reliable inference. The independence assumption states that the observations are independent of each other. In this case, it is not explicitly mentioned whether the yogurt samples were independent or not. If the samples were obtained from the same batch or were not randomly selected, the independence assumption could be violated.

Regarding the Nearly Normal Condition, which assumes that the population of interest follows a nearly normal distribution, it is reasonable to assume that the distribution of calorie counts in vanilla yogurt is approximately normal. However, since we do not have information about the population distribution, we cannot definitively justify this condition.

b) The appropriate hypotheses for testing the claim made by the diet guide would be:

H0: The average calories per serving of vanilla yogurt is 120.

HA: The average calories per serving of vanilla yogurt is not equal to 120.

To test these hypotheses, we can use a t-test for a single sample. The test statistic (t) can be calculated by taking the mean of the sample calorie counts and subtracting the claimed average (120), divided by the standard deviation of the sample mean. The p-value can then be determined using the t-distribution and the degrees of freedom associated with the sample.

Without the actual sample mean and standard deviation, it is not possible to provide the specific test statistic and p-value for this scenario. These values need to be calculated using the given data (calorie counts) in order to draw a conclusion about the claim made by the diet guide.

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To solve this problem, we need to use the formula for the z-score:z = (x - μ) / (σ / sqrt(n)), where x is the sample mean (which is the average score in 16 selected games), μ is the population mean (which is 43.06 points), σ is the population standard deviation (which is 15 points), and n is the sample size (which is 16).

Given the average score in the NFL is 43.06 points with a standard deviation of 15 points. Since we are looking at the average of 16 selected games, we need to calculate the standard error, which is the standard deviation divided by the square root of the sample size (in this case, 16):

Standard error = 15 / √16 = 15 / 4 = 3.75

Now, we will calculate the z-score for 38 points, which represents how many standard errors 38 points is away from the average score:

Z-score = (38 - 43.06) / 3.75 = -1.35

Using a z-score table or calculator, we find the probability of a z-score being less than -1.35 is approximately 0.0885 or 8.85%.

Since we want the probability that the average of 16 selected games scored larger than 38 points, we need to find the complement of this probability:

Probability (average score > 38) = 1 - 0.0885 = 0.9115 or 91.15%

So, the probability that the average of 16 selected games scored larger than 38 points is approximately 91.15%.

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To find the probability of obtaining 12 or more heads in 20 coin tosses using the approximation of binomial distribution to normal distribution, we calculate the mean and standard deviation and use the normal distribution table.

To find the probability of obtaining 12 or more heads in 20 coin tosses using the approximating binomial to normal method, we can use the following steps:

Step 1: Determine the parameters of the binomial distribution.

In this case, the number of trials (n) is 20 (coin tosses) and the probability of success (p) is 0.5 (since the coin is fair).

Step 2: Calculate the mean (μ) and standard deviation (σ) of the binomial distribution.

For a binomial distribution, the mean is given by μ = n * p, and the standard deviation is given by σ = \(\sqrt(n * p * (1 - p))\).

μ = 20 * 0.5 = 10

σ = \(\sqrt(20 * 0.5 * (1 - 0.5))\) = \(\sqrt(5)\) ≈ 2.236

Step 3: Convert the problem into a normal distribution.

To approximate the binomial distribution with a normal distribution, we need to use the continuity correction. Since we want to find the probability of obtaining 12 or more heads, we will consider the interval from 11.5 to 20.5.

Step 4: Standardize the values.

We need to standardize the lower and upper values of the interval using the z-score formula:

z = (x - μ) / σ

For the lower value, z_lower = (11.5 - 10) / 2.236 ≈ 0.536

For the upper value, z_upper = (20.5 - 10) / 2.236 ≈ 4.492

Step 5: Calculate the cumulative probability.

We will use the standard normal distribution table or a calculator to find the cumulative probabilities associated with the z-scores.

P(X ≥ 12) ≈ P(Z ≥ 0.536) ≈ 1 - P(Z < 0.536)

P(X ≥ 12) ≈ 1 - 0.7032 ≈ 0.2968

Therefore, the probability of obtaining 12 or more heads in 20 coin tosses using the approximating binomial to normal method is approximately 0.2968.

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7.702 is the proper decision.

What exactly is a p-value?

Answer:

Step-by-step explanation:

Yes, the cost y in dollars and the amount of yogurt x are proportional the equation is y = 0.08x.

Given:

At the local dairy farm, kareem buys a 32-oz container of yogurt for $2. 56. Jonah buys a 6-oz container of yogurt for $0. 48.

y varies directly as x :

y = kx

k = constant of proportionality

y = 2.56 and x = 32

y = kx

k = y/x

= 2.56/32

k = 0.08

substitute k we get

y = 0.08x.

so x and y are directly proportional.

Therefore Yes, the cost y in dollars and the amount of yogurt x are proportional the equation is y = 0.08x.

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Answer:

36 feet

Step-by-step explanation:

Let us first find the area of the of the flower bed. It is a rectangle, so:

A = 18 * 4.5 = 81 square feet

The square flower bed has the same area, therefore, the length of the sides of the flower bed can be gotten. The area of a square is:

\(A = L^2\)

\(81 = L^2\\\\L = \sqrt{81}\)

L = 9 feet

Next, we need to find the perimeter of the square flower bed:

P = 4L

=> P = 4 * 9 = 36 feet

He needed 36 feet of fence to enclose the entire square flower bed.

The slope of a fairly flat upward-sloping line will be a small positive number. (option c)

This is because a slope measures the change in the y value for a given change in the x value. As the line is fairly flat, the change in y value will be small. Since the line is upward-sloping, the change in the y value will be positive. Therefore, the slope of the line will be a small positive number.

To calculate the slope mathematically, we can use the formula

This formula gives us the slope of the line between two points (x1, y1) and (x2, y2). In our case, since the line is fairly flat, the difference in y values (y2-y1) will be small, resulting in a small positive number for the slope.

We can also visualize this mathematically. If we graphed the line, it would look like a flat line, because the difference in y values is small. Therefore, the slope of the line will be a small positive number.

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Answer:

x =7

Step-by-step explanation:

3x - 9 + 12 - 6x = -18

Combine like terms

-3x +3 = -18

Subtract 3 from each side

-3x +3 -3 = -18 -3

-3x = -21

Divide each side by-3

-3x /-3 = -21 /-3

x =7

Answer:

\(x=7\)

Step-by-step explanation:

\(3x - 9 + 12 - 6x = -18\)

\(3x+ - 9 + 12+ - 6x = -18\)

\(3x+- 6x + - 9 + 12+ = -18\)

\(-3x+ 3= -18\)

\(-3x= -18-3\)

\(-3x= -21\)

\(3x=21\)

\(x=21/3\)

\(x=7\)

The standard deviation of returns is 0.0665 when a person is holding stock and there are three possible outcomes.

To calculate the expected return, we multiply the probability of each state by its corresponding return and sum them up:

Expected return = (20% * 18%) + (55% * 9%) + (25% * -5%)

Expected return = 0.20 * 0.18 + 0.55 * 0.09 + 0.25 * (-0.05)

Expected return = 0.036 + 0.0495 - 0.0125

Expected return = 0.073

The expected return is 7.30%.

To calculate the standard deviation of returns, we need to find the variance first. The variance is calculated as the weighted sum of squared deviations from the expected return:

Variance = (20% * (18% - 7.30%)^2) + (55% * (9% - 7.30%)^2) + (25% * (-5% - 7.30%)^2)

Variance = 0.20 * (0.1077)^2 + 0.55 * (0.0177)^2 + 0.25 * (-0.123)^2

Variance = 0.00232 + 0.000173 + 0.001903

Variance = 0.004423

The standard deviation is the square root of the variance:

Standard deviation = √(0.004423)

Standard deviation = 0.0665

Therefore, the value obtained is 0.0665.

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The graph of the sequence may pass toward the vertical line test.

Functions are defined as a fundamental part of the calculus in mathematics. These are the special types of relations. A function is visualized as a rule, which gives a unique output for every input x.

Given the information that, he gives two away on day 1, four away on day 2, and eight away on day 3. He continues this pattern for 10 days.

Let x be the number of days and f(x) be the number of cards.

So, the pattern is

f(x)=2, when x=1

f(x)=4, when x=2

f(x)=8, when x=3

Then, the function will be f(x)=2ˣ

The equation of the graph is passing through a vertical line.

The vertical line test is a graphical method that determines whether a curve in the plane represents the graph of a function by visually examining the number of intersections of the curve with vertical lines.

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The only kind of data generated by observational research is correlations or patterns in the data that have been observed. By using correlations, one variable's value can be used to predict the value of another.

Explanation:

Accurate predictions using data correlation can be ensured by using a variety of methods. Firstly, it is important to ensure that the data is free from errors and is of high quality. This can be done by cleaning and validating the data to remove any inconsistencies and outliers. Secondly, it is important to analyze the data thoroughly and identify any patterns or trends. Furthermore, it is beneficial to use appropriate statistical tests and algorithms such as linear regression, logistic regression, and decision trees to identify the predictive relationships between the variables. Finally, it is important to evaluate the model’s performance to determine the accuracy of the predictions.

The most effective methods for ensuring accurate predictions using data correlation are:

1. Perform Exploratory Data Analysis: Exploratory data analysis is an essential step in any predictive modeling process. It involves exploring the data to identify patterns, trends, and relationships within the data. This helps to identify any potential issues or biases within the data that could affect the accuracy of predictions.

2. Use Statistical Tests: Statistical tests can be used to measure the strength of the relationship between two variables. These tests can help to identify which variables are most strongly correlated with each other and can help to determine which variables should be used in a predictive model.

3. Use Machine Learning Algorithms: Machine learning algorithms can be used to create predictive models that can identify and learn patterns in the data. These algorithms are particularly effective at identifying complex relationships between variables that may not be identified by statistical tests.

4. Validate Predictions: Predictions should always be validated to ensure that they are accurate and reliable. This can be done by comparing the predictions against known outcomes or by testing the model on a separate data set.

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Answer:

8

Step-by-step explanation:

8 x 3 = 24

24 - 4 = 20

The rank of matrix A = 6, dim row A = 6 and dim col A = 6.

Given a 7 × 9 matrix, if the null space of the matrix is 3-dimensional, then to find the rank of matrix A, dimension of row space and dimension of column space. Let us use rank-nullity theorem which states that the dimension of the null space added to the rank of a matrix equals the number of columns of the matrix.Let N(A) be the null space of matrix A.

ThenNullity (A) + Rank (A) = number of columns of A => Nullity (A) + Rank (A) = 9Nullity (A) = 3Dim N(A) = 3We know that dim Row (A) = Rank (A)Thus, Rank (A) = 9 - Nullity (A) = 9 - 3 = 6Dim Row (A) = Rank (A) = 6To find dimension of column space we know that dim Column (A) = number of non-zero columns in Row Echelon Form of AThus, 3 columns are zero. Therefore, 9 - 3 = 6 columns are non-zeroHence, dim Col (A) = 6Therefore, rank of matrix A = 6, dim row A = 6 and dim col A = 6.

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Answer:

Según los datos brindados, la altura de la pirámide egipcia de Keops sería de:

Step-by-step explanation:

Para resolver el ejercicio, debes conocer la fórmula para calcular el volumen de una pirámide cuadrangular, el cual es el tipo de pirámide al cual pertenece la pirámide de Keops:

Donde:

Como queremos identificar la altura, despejamos esa variable de la ecuación, pero para simplificar un poco, vamos a escribir el volumen de la pirámide con la variable "v":

Y en esta ecuación que despejamos, procedemos a reemplazar los valores de volumen y base que nos dieron en el ejercicio:

Y realizamos las operaciones correspondientes:

Aproximamos el número al entero más cercano, por lo tanto, la altura de dicha pirámide con los datos dados sería de aproximadamente 146 metros.

Yes, these data support the scientist's belief that large islands are more effective at protecting at-risk species than small islands. To provide statistical justification, we can compare the probability of extinction for each island size: For large islands, the probability of extinction is 19/208, or approximately 0.091. For small islands, the probability of extinction is 66/299, or approximately 0.221.

The data provided can support the scientist's belief that large islands are more effective than small islands for protecting at-risk species. We can use the concept of probability to calculate the likelihood of extinction for both large and small islands.

For the large island, the probability of extinction for any given species is 19/208 or approximately 0.091. For the small island, the probability of extinction for any given species is 66/299 or approximately 0.221.

Comparing these probabilities, we see that the probability of extinction is higher for at-risk species on small islands than on large islands. This supports the scientist's belief that large islands are more effective for protecting at-risk species.

Additionally, we can use statistical tests such as a chi-square test or a two-sample t-test to confirm whether the difference in extinction rates between large and small islands is statistically significant.

These tests would require more information such as sample size and variance, but based on the provided data alone, the probability calculations suggest that the scientist's belief is supported.

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With the help of the figure we can say that triangles are congruent by SAS Rule

What is Congruence of Triangle?

Triangle congruence: Two triangles are said to be congruent if all three of their corresponding sides are equal and all three of their corresponding angles are equal in size. These triangles can be moved, rotated, flipped, and turned to look exactly the same.

Solution:

By SAS rule, two triangles are said to be congruent if any two sides and the angle included between the sides of one triangle are comparable to the corresponding two sides and the angle included between the sides of the second triangle.

In given figure, sides AB= PQ, BC=QR and angle between AB and BC equal to angle between PQ and QR i.e. ∠B = ∠Q. Hence, Δ ABC ≅ Δ PQR.

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Answer: 19.6 feet

Step-by-step explanation:

Using the Pythagorean theorem,

\(x^2 +(x+6)^2 =48^2\\\\x^2 +x^2 +12x+36=2304\\\\2x^2 +12x-2268=0\\\\x^2 +6x-1134=0\\\\x=\frac{-6 \pm \sqrt{6^2 -4(1)(-1134)}}{2(1)}\\\\x \approx 30.8 \text{ } (x > 0)\\\\\implies x+(x+6) \approx 67.6\\\\\therefore (x+(x+6))-48 \approx 19.6\)

\(\\ \tt\hookrightarrow y^2=11.6^2-7.5^2\)

\(\\ \tt\hookrightarrow y^2=134.56-56.25\)

\(\\ \tt\hookrightarrow y^2=78.3\)

\(\\ \boxed{\tt\hookrightarrow y\approx 8.3}\)

\(\\ \tt\hookrightarrow w^2=8.3^2+15^2=78.3+225=303.3\implies \boxed{\bf w=17.3}\)

And

\(\\ \tt\hookrightarrow z^2=14^2-2.7^2=196-7.29=188.71\implies \boxed{\bf z=13.4}\)

Now

\(\\ \tt\hookrightarrow u^2=5.8^2-2.7^2=33.64-7.29=26.35\implies \boxed{\bf u=5.1}\)

Describe four common ways in which individuals respond to perceived inequity are -

Equity, also known as shareholders' equity (or shareholders' equity for private companies), is the sum of money which would be handed back to a company ’s creditors if each of its assets have been liquidated and all of its debt was paid off in the event of liquidation.

Some key features regarding the equity are-

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The antiderivative of sin^3(3x)cos(3x) using u-substitution is (1/9) * sin^3(3x) + C.

To find the antiderivative of sin^3(3x)cos(3x) using u-substitution, we can let u = sin(3x), which implies du = 3cos(3x)dx. Rearranging, we have dx = du / (3cos(3x)). Now, we substitute these expressions into the integral: ∫ sin^3(3x)cos(3x) dx = ∫ (sin^2(3x) * sin(3x) * cos(3x)) dx = ∫ (u^2 * du) / 3. Simplifying the integral, we have: ∫ (u^2 * du) / 3 = (1/3) * ∫ u^2 du = (1/3) * (u^3 / 3) + C.

Substituting back u = sin(3x), we get: (1/3) * (sin^3(3x) / 3) + C. Therefore, the antiderivative of sin^3(3x)cos(3x) using u-substitution is (1/9) * sin^3(3x) + C.

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The Area of the figure below is composed of a rectangle and semicircles that will be 56.1 unit sq.

The semicircles can be composed into a circle with a radius 3,

The area of a circle is πr² where r is the radius.

πr²= 3 x 3 /2 π

A ≈ = 99/7

A = 14.1

The area of the rectangle = Length x width

= 7 x 6

= 42

Total area of a figure = 14.1 + 42 = 56.1

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Explanation:

We have the general slope intercept form y = mx+b. All we do is replace m with the given slope 1/4, and replace b with the y intercept -1.

So we have y = mx+b turn into y = (1/4)x+(-1) which simplifies to y = (1/4)x-1.

Answer:

\(y = x \ln 2 +\left(\ln 2 \right)^2-2 \ln 2\)

Step-by-step explanation:

Differentiation is an algebraic process that finds the gradient of a curve.

At a point, the gradient of a curve is the same as the gradient of the tangent line to the curve at that point.

\(\boxed{\begin{minipage}{5.4 cm}\underline{Chain Rule for Differentiation}\\\\If $y=f(u)$ and $u=g(x)$ then:\\\\$\dfrac{\text{d}y}{\text{d}x}=\dfrac{\text{d}y}{\text{d}u}\times\dfrac{\text{d}u}{\text{d}x}$\\\end{minipage}}\)

\(\boxed{\begin{minipage}{4.5 cm}\underline{Differentiating $x^n$}\\\\If $y=x^n$, then $\dfrac{\text{d}y}{\text{d}x}=nx^{n-1}$\\\end{minipage}}\)

\(\boxed{\begin{minipage}{4.5 cm}\underline{Differentiating $\ln x$}\\\\If $y=\ln x$, then $\dfrac{\text{d}y}{\text{d}x}=\dfrac{1}{x}$\\\end{minipage}}\)

Differentiate the given function using the chain rule:

\(\begin{aligned}f(x) & = \left(\ln x\right)^2\\\implies f'(x)& = 2\left(\ln x\right)^{2-1} \cdot \dfrac{\text{d}}{\text{d}x} \ln x\\& = 2\left(\ln x\right)^{1} \cdot \dfrac{1}{x}\\& = \dfrac{2}{x} \ln x \end{aligned}\)

To find the gradient of the function at x = 2, substitute x = 2 into the differentiated function:

\(\implies f'(2) = \dfrac{2}{2} \ln 2 = \ln 2\)

Therefore, the gradient of the function at x = 2 is ln(2).

Substitute x = 2 into the function to find the y-value of the point on the curve when x = 2:

\(\implies f(2)= \left( \ln 2\right)^2\)

Slope-intercept form of a linear equation:

\(y=mx+b\)

where:

Substitute the point (2, (ln 2)²) and the found gradient into the slope-intercept formula and solve for b:

\(\begin{aligned} y & = mx+b\\\implies \left(\ln 2 \right)^2 & = \ln 2 \cdot 2 + b\\\left(\ln 2 \right)^2 & =2\ln 2 +b\\b & = \left(\ln 2 \right)^2-2 \ln 2\end{aligned}\)

Therefore, the tangent has the equation:

\(y = x \ln 2 +\left(\ln 2 \right)^2-2 \ln 2\)

Answer: 5 times

Step-by-step explanation: 11 goes into 50 four times. That means that the first four times the carousel runs, 11 kids will be on it. But since six ungrateful children were left out, the carousel will need to run one extra time so those brats can get a turn.

Answer:2−12+33=0

Step-by-step explanation:

The last sentence of the proof states, "By the Pythagorean theorem, since a squared plus b squared equals c squared, the sum of f and e is equal to c."

The proof establishes the proportions and similarities between the triangles in the diagram. It shows that the ratios of corresponding sides in the similar triangles hold true, leading to the proportions a/c = c/a and b/c = c/e. These proportions can be rearranged to obtain a2 = cf and b2 = ce.

The next step in the proof adds b2 to both sides of the equation a2 = cf, resulting in a2 + b2 = cf + b2. Since b2 = ce, we substitute ce into the equation, giving us a2 + b2 = cf + ce.

The final step applies the converse of the distributive property, which states that if a + b = c, then a(b + d) = ab + ad. In this case, we have a2 + b2 = cf + ce, which can be rewritten as a2 + b2 = c(f + e).

Therefore, the last sentence of the proof concludes that because a2 + b2 = c2 (as derived from the previous steps), it follows that f + e = c. This statement completes the proof and establishes the relationship between the lengths of the sides and the altitude in the right triangle. Option C is correct.

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It would take 4 weeks for the cost of the food delivery service to equal the regular weekly grocery bill. The total cost would amount to $320.

- x represents the number of weeks.

- C represents the cost of the food delivery service.

- G represents the regular weekly grocery bill.

Based on the given information, we can establish the following equations:

- For the food delivery service: C = 80 + 70(x - 1)

- For the regular grocery bill: G = 60

We need to find the number of weeks (x) when the cost of the food delivery service (C) is equal to the regular grocery bill (G).

Setting the equations equal to each other, we have:

80 + 70(x - 1) = 60

Now, let's solve for x:

80 + 70(x - 1) = 60

70(x - 1) = 60 - 80

70(x - 1) = -20

x - 1 = -20/70

x - 1 = -2/7

x = 1 - 2/7

x = 5/7

Since x represents the number of weeks, we round up to the nearest whole number, resulting in x = 1 week.

To find the total cost, we substitute x = 1 into the equation for C:

C = 80 + 70(1 - 1)

C = 80

Therefore, it would take 4 weeks for the cost of the food delivery service to equal the regular weekly grocery bill. The total cost over those 4 weeks would amount to $320.

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