scale 1:100
If the length of the whale on the picture is 250 cm find the actual length of the whale in meters.​

Suppose we are testing the null hypothesis H0: µ = 62 against the alternative hypothesis H1: µ ≠ 62, where σ is unknown and n = 14.

We are given that the data comes from a normal population and that our test statistic value is -2.483.

To find the p-value, we need to determine the probability of obtaining a test statistic value as extreme or more extreme than our observed value of -2.483, assuming that the null hypothesis is true. Since the population standard deviation is unknown, we must use the t-distribution to find the p-value.

The t-distribution is similar to the standard normal distribution, but accounts for the uncertainty in the population standard deviation by using the sample standard deviation instead.

Using a t-distribution table or calculator with df = n - 1 = 13, we find that the two-tailed p-value for our test statistic is approximately 0.027. This means that the probability of obtaining a test statistic as extreme or more extreme than -2.483, assuming that the null hypothesis is true, is 0.027.

The smallest level of significance at which we would reject H0 is any value less than 0.027. This means that if we choose a significance level α less than 0.027, we would reject the null hypothesis and conclude that there is evidence to support the alternative hypothesis.

However, if we choose a significance level greater than or equal to 0.027, we would fail to reject the null hypothesis and conclude that there is not enough evidence to support the alternative hypothesis.

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The predicted value of y is 436.6 when x1 equals 15 and x2 equals 33 in this multiple regression model.

To predict y using the given sample regression equation, you need to plug in the given values of x1 and x2 into the equation and then solve for y.

1. Write down the sample regression equation: yˆ = 157 + 12.7x1 - 2.7x2
To predict y when x1 equals 15 and x2 equals 33, we plug those values into the sample regression equation:
yˆ = 157 + 12.7(15) + 2.7(33)
yˆ = 157 + 190.5 + 89.1
yˆ = 436.6
2. Substitute the given values of x1 (15) and x2 (33) into the equation:

yˆ = 157 + 12.7(15) - 2.7(33)

3. Calculate the values within the parentheses:

yˆ = 157 + 190.5 - 89.1

4. Perform the addition and subtraction:

yˆ = 436.6

So, when x1 equals 15 and x2 equals 33, the predicted value of y (rounded to one decimal place) is 258.4.

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The trigonometric identity:

sin(x/2) = -√(1/12) , cos(x/2) = √(11/12), and tan(x/2) = -36/55.

Since sec(x) = 6/5 and x is in the fourth quadrant (270° < x < 360°), we can draw a reference triangle in the fourth quadrant, where the adjacent side is positive and the hypotenuse is 5 and the opposite side is -6.

Then we can use the half-angle formulas to find sin(x/2), cos(x/2), and tan(x/2):

sin(x/2) = ±√((1 - cos(x))/2)

cos(x/2) = ±√((1 + cos(x))/2)

tan(x/2) = sin(x)/(1 + cos(x))

Since x is in the fourth quadrant, sin(x) is negative and cos(x) is positive, so we take the negative square roots in both of the half-angle formulas to get the appropriate signs for sine and cosine:

sin(x/2) = -√((1 - cos(x))/2)

cos(x/2) = √((1 + cos(x))/2)

First, we need to find cos(x) from the given information. Since sec(x) = 6/5, we know that cos(x) = 5/6.

Then, we can substitute this value into the half-angle formulas to get:

sin(x/2) = -√((1 - 5/6)/2) = -√(1/12)

cos(x/2) = √((1 + 5/6)/2) = √(11/12)

Finally, we can use the half-angle formula for tangent to get:

tan(x/2) = sin(x)/(1 + cos(x)) = (-6/5)/(1 + 5/6) = -36/55.

Therefore, sin(x/2) = -√(1/12) , cos(x/2) = √(11/12), and tan(x/2) = -36/55.

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The median is the middle value of a set of numbers. To find the median of the sample values provided, we need to first arrange the numbers in order from least to greatest: 3, 7, 11, 18, 24, 27, 32, 35, 41, 46.

Next, we need to determine the middle value or the average of the two middle values, if there is an even number of values in the set.

In this case, we have 10 values in the set, so we need to find the average of the fifth and sixth values: (24 + 27) / 2 = 25.5. Therefore, the median of the sample values is 25.5.

The median is an important measure of central tendency in statistics because it is less sensitive to outliers or extreme values than the mean. It is often used in conjunction with the mean to provide a more complete understanding of a dataset. The sample values provided are relatively close together, so the difference between the median and the mean (if calculated) would likely be small.

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Answer:

When the input is 1, the output is 2.

When the input is 6, the output is 12.

When the input is 7, the output is 14.

Answer:

If the input is 8, the output will be 16. If it is 9, the output will be 18.

Step-by-step explanation:

The output is the input multiplied by 2

The input of 1 is multiplied by 2 to get the output of 2.

The input of 6 is multiplied by 2 to get the output of 12.

The input of 7 is multiplied by 2 to get the output of 14.

This will continue with every input, whatever the number is (or n), it will be multiplied by 2 in order to get the output.

The perimeter of triangle ABC is approximately 24.53 units.

To find the perimeter of triangle ABC, we need to know the lengths of all three sides. We can use the given information about the angles and side lengths to solve for the missing side lengths using trigonometry.

Let's start with the side opposite the 29-degree angle, which we'll call side AB. We can use the sine function to find the length of AB:

sin(29) = opposite/hypotenuse

opposite = sin(29) x 10

opposite ≈ 4.83

So, side AB has a length of approximately 4.83 units.

Next, let's move on to the side opposite the 61-degree angle, which we'll call side AC. We can use the same process:

sin(61) = opposite/hypotenuse

opposite = sin(61) x 10

opposite ≈ 8.66

So, side AC has a length of approximately 8.66 units.

Finally, we know that one of the angles in the triangle is 90 degrees, so the third angle must be:

180 - 90 - 29 = 61 degrees

This means that side BC is the hypotenuse of a right triangle with one leg of length 4.83 and the other leg of length 8.66. We can use the Pythagorean theorem to find the length of BC:

BC² = AB² + AC²

BC² = 4.83² + 8.66²

BC² ≈ 94.08

BC ≈ 9.7

So, side BC has a length of approximately 9.7 units.

Now that we have the lengths of all three sides, we can find the perimeter of triangle ABC:

Perimeter = AB + BC + AC

Perimeter = 4.83 + 9.7 + 10

Perimeter ≈ 24.53

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Answer:

Step-by-step explanation:

[tex]4(x^{2} +10x + 16)\\4(x+2)(x+8)[/tex]

The value of α that would generate the most stable forecast is 0.10.

Exponential smoothing is a forecasting method that uses a weighted average of past observations to predict future values. The weight of each past observation decreases exponentially as it gets older. The value of the smoothing constant, α, determines how quickly the weights decay and thus how much emphasis is placed on recent observations versus past observations. A larger value of α means more weight is given to recent observations, resulting in a forecast that is more responsive to changes in the data but also more volatile. Conversely, a smaller value of α means less weight is given to recent observations, resulting in a forecast that is more stable but less responsive to changes in the data.

Therefore, in order to generate the most stable forecast, we would want to choose a smaller value of α. Among the options given, the value of α that would generate the most stable forecast is 0.10. This would give relatively less weight to recent observations and result in a smoother, less volatile forecast. However, it is important to note that the optimal value of α depends on the specific time series being forecasted and must be chosen based on empirical evaluation of the forecast accuracy.

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True. When performing econometric analysis on time-series data, it is a best practice to sort the data in chronological order. Econometric analysis involves using statistical methods to study and understand economic relationships, trends, and patterns.

Time-series data refers to a set of observations collected at regular intervals over time, such as stock prices, GDP growth, or unemployment rates.

Sorting the data in chronological order is essential because it allows for a proper understanding of the temporal relationship between different data points. This ordering helps researchers identify patterns, trends, and potential causal relationships within the data. Additionally, many econometric models, such as autoregressive or moving average models, rely on the assumption that the data points are arranged sequentially in time.

In summary, when conducting econometric analysis on time-series data, it is crucial to sort the data in chronological order to accurately analyze patterns, trends, and relationships. This practice enables researchers to develop robust models that can be used for forecasting and understanding the underlying economic processes.

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The first partial derivative of f(x,y) with respect to x is:

∂f/∂x = a(bx - ad) + c(cx + dy)

The first partial derivative of f(x,y) with respect to y is:

∂f/∂y = b(cx + dy) + c(cx + dy)

The probability of drawing a red marble followed by a blue marble from a bag containing 4 red, 3 yellow, and 7 blue marbles can be calculated using the formula for conditional probability. Finally, we multiply these two probabilities together to get the joint probability of drawing a red marble followed by a blue marble, which is 14/91 or approximately 0.1538.

The probability of drawing a red marble on the first draw is 4/14 (or simplifying, 2/7) since there are 4 red marbles out of 14 total marbles in the bag. After the first marble is drawn, there are now 13 marbles left in the bag, with 7 of them being blue. Therefore, the probability of drawing a blue marble on the second draw given that a red marble was drawn on the first draw is 7/13. Multiplying these probabilities together gives us the joint probability of drawing a red marble followed by a blue marble: (2/7) * (7/13) = 14/91 or approximately 0.1538.

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Answer:

a

Step-by-step explanation:

The correct interpretation of a 95% confidence interval for the proportion of young adults who skip breakfast being .20 to .27 is that there is a 95% chance that the true proportion of young adults who skip breakfast lies between .20 and .27.

A confidence interval is a range of values that is likely to contain the true population parameter with a certain degree of confidence. In this case, we are 95% confident that the true proportion of young adults who skip breakfast lies between .20 and .27. This means that if we were to repeat this study many times, 95% of the resulting confidence intervals would contain the true proportion of young adults who skip breakfast. It is important to note that this does not mean that there is a 95% chance that the true proportion of young adults who skip breakfast is between .20 and .27, but rather that we are 95% confident that it is.

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The area of the remaining poster board is given as follows:

240 square inches.

To obtain the area of a rectangle, you need to multiply its length by its width. The formula for the area of a rectangle is:

Area = Length x Width

The dimensions for the entire board are of 29 inches and 10 inches, hence:

A = 29 x 10

A = 290 square inches.

The removed part is of four right triangles of sides of 5 inches, hence:

Ar = 4 x 1/2 x 5 x 5

Ar = 50 square inches.

Hence the remaining area is given as follows:

290 - 50 = 240 square inches.

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The parametric equations for the tangent line to the curve at the point (5/3, 5, 4) are x(t) = -6.708t + 14.036, y(t) = 3.536t + 1.932, and z(t) = -8.986t + 12.97.

To find the tangent line to the curve at the given point, we first need to find the value of t that corresponds to the point.

We can do this by setting the x, y, and z equations equal to the given coordinates and solving for t:

10 cos(t) = 5/3

10 sin(t) = 5

8 cos(2t) = 4

Solving the first equation for cos(t) and the second equation for sin(t), we get:

cos(t) = 1/6

sin(t) = 1/2

Using the identity cos^2(t) + sin^2(t) = 1, we can find the value of cos(2t):

cos^2(t) + sin^2(t) = 1

cos^2(t) + (1-cos^2(t)) = 1

2cos^2(t) = 1

cos(2t) = 2cos^2(t) - 1 = -11/18

So the value of t that corresponds to the point (5/3, 5, 4) is t = arctan(2) ≈ 1.107.

Now, to find the parametric equations for the tangent line, we need to find the derivative of each component function with respect to t. We have:

x'(t) = -10 sin(t)

y'(t) = 10 cos(t)

z'(t) = -16 sin(2t)

Evaluating these at t = arctan(2), we get:

x'(arctan(2)) = -10 sin(arctan(2)) ≈ -6.708

y'(arctan(2)) = 10 cos(arctan(2)) ≈ 3.536

z'(arctan(2)) = -16 sin(2arctan(2)) ≈ -8.986

So the parametric equations for the tangent line are:

x(t) = 5/3 - 6.708(t - arctan(2))

y(t) = 5 + 3.536(t - arctan(2))

z(t) = 4 - 8.986(t - arctan(2))

Simplifying, we get:

x(t) = -6.708t + 14.036

y(t) = 3.536t + 1.932

z(t) = -8.986t + 12.97

Therefore, the parametric equations for the tangent line to the curve at the point (5/3, 5, 4) are x(t) = -6.708t + 14.036, y(t) = 3.536t + 1.932, and z(t) = -8.986t + 12.97.

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Answer:The revenue in 2001 was $24,000, and the revenue in 2019 was $96,000. Using these two data points, write the equation for a line of fit for the data.

Step-by-step explanation:

The closest range of volumes of the three sample is 30 (1st option)

To know which value is closest to the volume of the sample, we shall determine the volume of the sample. Details below:

From the question given above, we obtained the following:

We shall assume the sample to be at standard temperature and pressure (STP). Thus, we have:

1 mole of gas sample = 22.4 Liters

Therefore,

1.4 mole of gas sample = (1.4 mole × 22.4 Liters) / 1 mole

1.4 mole of gas sample = 31.36 liters

Thus, the volume of the sample is 31.36 liters. Considering the options given from the question, the closest to the volume is 30 (1st option)

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The required manager has 12 fifty-dollar bills as of the given condition.

Let's denote the number of twenty-dollar bills as "x" and the number of fifty-dollar bills as "y".

We know that the convention manager has a total of 48 bills, so:
x + y = 48

We also know that the total amount of money she has is $1320, which can be expressed as:
20x + 50y = 1320

To solve for "y", we can rearrange the first equation to get:
y = 48 - x

Then substitute this expression for "y" in the second equation:

20x + 50(48 - x) = 1320

Expanding the expression and simplifying:
20x + 2400 - 50x = 1320
-30x = -1080
x = 36

So the manager has 36 twenty-dollar bills. To find the number of fifty-dollar bills, we can use the first equation:

x + y = 48

36 + y = 48

y = 12

Therefore, the manager has 12 fifty-dollar bills.

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The steps involved are;

The steps involved in constructing 30 degrees include;

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Complete question:

What are the steps involved in construction of 30 degrees

We reject the null hypothesis and conclude that there is a significant association between the type of crime and the district. Further investigation is necessary to determine the underlying factors contributing to the observed patterns of crime in different areas of city.

To determine if the occurrence of crime is dependent on the city district, we can perform a chi-square test of independence. The null hypothesis states that there is no association between the type of crime and the district. The alternative hypothesis is that there is a significant association between the two.

Using the given data, we can calculate the expected values for each cell under the assumption of independence. We then use these values to calculate the chi-square statistic and the corresponding p-value.

After performing the calculations, we find that the chi-square statistic is 149.47 with 9 degrees of freedom, and the p-value is less than 0.01. This means that we reject the null hypothesis and conclude that there is a significant association between the type of crime and the district.

Therefore, we can conclude that the occurrence of certain types of crime is dependent on the city district. However, it is important to note that correlation does not imply causation and further investigation is necessary to determine the underlying factors contributing to the observed patterns of crime in different areas of the city.

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Rectangle TUVY is dilated by a scale factor of 1/2 to form rectangle T’U’V’Y’.  The measure of side W’T’ is 15 units.

If rectangle TUVY is dilated by a scale factor of 1/2 to form rectangle T’U’V’Y’, the lengths of the corresponding sides are also scaled down by the same factor.

Given that side WT measures 30 units, we need to find the measure of side W’T’.

Since the scale factor is 1/2, we can calculate the length of W’T’ as follows:

W’T’ = (1/2) * WT

Substituting the given value:

W’T’ = (1/2) * 30

W’T’ = 15

Therefore, the measure of side W’T’ is 15 units.

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Answer:

5

Step-by-step explanation:

you see here you go to red and green and their you see it.. I might be right

The true statement about the box plot is the one in option C;

The interquartile range is 3 and the range is 8.

Here we have a box plot, we can see that the graph goes from 1 to 9 (in the horizontal axis).

Such that:

The range is the difference between the larger and the smaller value, so here we have:

Range = 9 - 1 = 8

The interquartile range is the same, but now we only look at the values in the rectangles, the largest value is 6 and the smallest is 3:

interquartile range = 6 - 3 = 3

Then the correctoption is C.

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The equation that shows the given relationship is:

105*0.3 = x

We want to write an equation that shows the relationship.

30% of 105 is x.

First, remember that if we take a percentage X of a number N, the expression is:

N*(X/100%).

In this case we are taking the 30% of 105, then the expression is:

105*(30%/100%)

105*0.3

And that must be equal to x, then the equation that we want is:

105*0.3 = x

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To shift the summation index so that the general term of the given power series involves x^k, we can substitute k = n - 3 in the second series.

Let's first consider the first series:

sum_n=1^infinity nC_nx^n+3

We can write the general term of this series as:

a_n = nC_n * x^(n+3)

Now, let's look at the second series:

sum_k=4^infinity x^k

We can write the general term of this series as:

b_k = x^k

We want to shift the index of the second series so that the general term involves x^k. We can do this by substituting k = n - 3. This gives us:

sum_n=1^infinity b_n = sum_n=1^infinity x^(n-3)

Now, we can substitute this into the first series to get the desired result:

sum_n=1^infinity nC_nx^n+3 = sum_n=1^infinity nC_n * b_n = sum_n=1^infinity nC_n * x^(n-3)

Therefore, we have successfully shifted the summation index so that the general term of the given power series involves x^k.

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To apply the divergence theorem, we need to compute the divergence of the vector field (x,y,z)=〈x,y,3z〉. The flux of out the top of S is 0.

We have:

div = ∂∂x(x) + ∂∂y(y) + ∂∂z(3z) = 1 + 1 + 3 = 5.

Now, let's apply the divergence theorem to compute the flux of ⃗ through the closed surface S that bounds the solid W:

∫∫S · dS = ∭W div(⃗) dV

Since the solid W is bounded by the paraboloid z=x^2+y^2 and the plane z=4, we can set up the limits of integration as follows:

0 ≤ z ≤ 4

0 ≤ r ≤ √(4-z)

0 ≤ θ ≤ 2π

where r and θ are the cylindrical coordinates in the xy-plane.

Then, we have:

∭W div(⃗) dV = ∫₀⁴ ∫₀^(√(4-z)) ∫₀^(2π) 5r dz dr dθ

= 2π ∫₀⁴ ∫₀^(√(4-z)) 5r dz dr

= 2π ∫₀⁴ 5(4-z) dz

= 2π [5(4z - z^2/2)]|₀⁴

= 40π.

Therefore, the flux of through the closed surface S is 40π.

To find the flux of out the bottom of S (the truncated paraboloid), we can use the same limits of integration, but set z = 0:

∫∫S_bottom · dS = ∭W_bottom div dV

= ∫₀² ∫₀^(√(4-z)) ∫₀^(2π) 5r dz dr dθ

= 2π ∫₀² 5(4-z) dz

= 30π.

Therefore, the flux of ⃗ out the bottom of S is 30π.

To find the flux of  out the top of S (the disk), we can set z = 4:

∫∫S_top · dS = ∭W_top div dV

= ∫₀^(2π) ∫₀^√4 ∫₄^4 5z r dz dr dθ

= 0.

Since the vector field is perpendicular to the top of S (the disk), the flux through it is zero.

Therefore, the flux of out the top of S is 0.

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We can compute the power of a hypothesis test for different sample sizes by calculating b(0.21) for the alternative value p = 0.21.

For the alternative value p = 0.21, we can compute the power of a hypothesis test by calculating the probability of rejecting the null hypothesis when the true population proportion is actually 0.21. Here, we are interested in computing b(0.21) for different sample sizes, specifically n = 100, 2500, 10,000, 40,000, and 90,000.

The power of a hypothesis test increases as the sample size increases. For a fixed level of significance, a larger sample size allows us to detect smaller differences between the null hypothesis and the true population parameter. When the sample size is small, it may be difficult to detect a difference between the null and alternative hypotheses. However, as the sample size increases, the power of the test increases, and we become more confident in our ability to detect a significant result.

In summary, we can compute the power of a hypothesis test for different sample sizes by calculating b(0.21) for the alternative value p = 0.21. As the sample size increases, the power of the test also increases, allowing us to detect smaller differences between the null and alternative hypotheses. This highlights the importance of having a sufficiently large sample size to ensure the power of the test is high enough to detect meaningful differences.

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The only possibility is that both sides have lengths less than 13cm. In other words, a and b can be any two positive numbers such that a + b > 13.

However, the exact values of a and b cannot be determined without additional information or constraints.

To determine the possible lengths of the other two sides of the triangle, we can use the triangle inequality theorem.

According to the theorem, in a triangle, the sum of the lengths of any two sides must be greater than the length of the remaining side.

Let's denote the known side length as 13cm and the lengths of the other two sides as a and b.

We can analyze the possibilities:

If the lengths of the other two sides are both less than 13cm, then a + b < 13.

However, since a and b must be greater than 0, it is not possible for their sum to be less than 13.

If one side is greater than or equal to 13cm, then a + b > 13.

In this case, the sum of the other two sides would be greater than the known side, violating the triangle inequality theorem.

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The 99% confidence interval for the average resting heart rate of the population is between 71.61 bpm and 81.99 bpm.

To construct the 99% confidence interval, we can use the formula:

CI = x (bar) ± z*(σ/√n)

where  x (bar) is the sample mean, σ is the population standard deviation, n is the sample size, and z is the critical value of the standard normal distribution corresponding to a 99% confidence level (which is 2.576).

Substituting the given values, we get:

CI = 76.3 ± 2.576*(12.5/√40) = [71.61, 81.99]

Therefore, we can be 99% confident that the true population mean resting heart rate falls within this interval.

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