Solve
12x + 5 = 4x + 37
Optional working
X =
Ansi
+

The degrees of freedom for an independent t-test when n1 = 16 and n2 = 12 are 26.

Given,

n1 = 16

n2 = 12

Here,

An independent t-test, often known as a two-sample t-test, compares the means of two unrelated groups to see whether they are significantly different from each other. The t-test is an essential method that can help you determine whether or not a certain hypothesis is true, regardless of whether or not it is accurate.

Degree of freedom for independent t test: DF = (n1 + n2) - 2

DF = (16 + 12) - 2

DF = 26

Therefore, the degrees of freedom for an independent t-test when n1 = 16 and n2 = 12 are 26.

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Rounded to the nearest tenth, the missing length b is approximately 27.6.

To find the missing length b in a right triangle with a = 12.0 and c = 30.1, we can use the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the legs (a and b).

Using the Pythagorean theorem, we have:

[tex]c^2 = a^2 + b^2[/tex]

Substituting the given values, we get:

[tex](30.1)^2 = (12.0)^2 + b^2[/tex]

Simplifying the equation, we have:

[tex]906.01 = 144 + b^2[/tex]

Subtracting 144 from both sides, we get:

[tex]b^2 = 906.01 - 144\\b^2 = 762.01[/tex]

To find b, we take the square root of both sides:

[tex]b = \sqrt{762.01[/tex]

Calculating the square root, we find:

[tex]b \approx 27.6[/tex]

Rounded to the nearest tenth, the missing length b is approximately 27.6.

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Melissa has 14 video games and the correct option is option D.

We are given that Joey has 4 more video games than Solana and half as many as Melissa. Let us assume that the number of video games Joey has is x.

Joey = x

Now, as Joey has 4 more video games than Solana, it means Solana will have (x - 4) video games. Therefore;

Solana = x - 4

Joey has half as many as Melissa. It means Melissa has double the video games that Joey has. Therefore;

Melissa = 2x

Now, they together have 24 video games. So;

x + (x - 4) + 2x = 24

x + x - 4 + 2x = 24

4x - 4 = 24

4x = 28

x = 7

Melissa = 2x

= 2 * 7

= 14

Therefore, Melissa has 14 video games and the correct option is

option D.

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The complete question is "Joey has 4 more video games than Solana and half as many as Melissa. If together they have 24 video games, how many does Melissa have?

A 7

B 9

C 12

D 14 "

The 14.9% increase in Sylvia's lead lathe tech's hourly wage of $18.50 results in a $2.75 per hour increase. Assuming the lead lathe tech works 2,080 hours per year, the additional cost to Sylvia's annual wages budget would be approximately $5,720, excluding benefits or taxes.

First, we need to find the percentage increase in the lead lathe tech's hourly wage. The increase requested is $2.75, which is 14.9% of the current wage rate ($18.50). To calculate the percentage increase, we divide the increase by the current wage rate and multiply by 100: ($2.75 / $18.50) * 100 ≈ 14.9%.

To determine the additional cost to Sylvia's annual wages budget, we need to know the total number of hours worked by the lead lathe tech in a year. Let's assume the lead lathe tech works 40 hours per week and there are 52 weeks in a year, resulting in a total of 2,080 hours.

To calculate the annual cost of the wage increase, we multiply the hourly increase ($2.75) by the total number of hours worked (2,080): $2.75 * 2,080 ≈ $5,720.

Therefore, the 14.9% increase in the lead lathe tech's hourly wage will cost Sylvia an additional $5,720 in her annual wages budget, excluding benefits or taxes.

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To estimate the cost of a new 3000-ft² heat exchange system for a plant retrofit, we can use the price index and the information about the cost of a previous heat exchanger. Given that the price index 7 years ago was 1360 and is now 1478, and assuming a power-sizing exponent of 0.55, rough estimate for the cost of the new heat exchanger system is $77,700.

To estimate the cost, we need to account for the change in the price index over the years. The price index ratio is calculated as (new price index)/(old price index), which in this case is 1478/1360 = 1.085. Since the power-sizing exponent is 0.55, we raise the price index ratio to the power of 0.55, resulting in [tex]1.085^{0.55 {[/tex]≈ 1.036.

Next, we multiply the cost of the previous heat exchanger by this factor to estimate the cost of the new system. The cost of the previous heat exchanger was $75,000, so the rough estimate for the cost of the new heat exchanger system is approximately $75,000 × 1.036 ≈ $77,700.

It's important to note that this estimate is a rough approximation and does not account for other factors such as inflation or changes in technology. It serves as a starting point for estimating the cost of the new heat exchanger system based on the given information and assumptions.

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The distance between the parallel lines obtained using the formula for the distance between parallel lines is; 2·√(10) units

Parallel lines are lines that have the same slope and which maintain the same distance between them.

The equation of the parallel lines can be presented as follows;

3·x + y = 3...(1)

y + 17 = -3·x...(2)

The distance between parallel lines can be found using the formula for finding the distance, d, between parallel lines, A·x + B·y + C₁, and A·x + B·y + C₂ as follows;

d = |C₁ - C₂|/(√(A² + B²))

The above equation of the parallel lines can be presented form A·x + B·y + C as follows;

3·x + y - 3 = 0

3·x  + y + 17 = 0

Therefore; A = 3, B = 1, and C₁ = -3, C₂ = 17

Therefore; d = |-3 - 17|/(√(3² + 1²)) = 20/√(10) = 20/√(10) × √(10)/√(10)

20/√(10) × √(10)/√(10) = 20·√(10)/(10) = 2·√(10)

The distance between the parallel lines is; 2·√(10)

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To identify the coldest city in the United States, three different ways of selecting the coldest city could include looking at average annual temperature, average winter temperature, and record low temperatures.

When determining the coldest city based on average annual temperature, the city with the lowest average temperature throughout the year would be considered the coldest. This approach takes into account the overall temperature patterns and variations experienced by a city across all seasons.

Another method is to analyze the average winter temperature of different cities. Since winter is typically the coldest season, comparing the average temperatures during this time can help identify the coldest city. Cities with consistently low winter temperatures are more likely to be considered the coldest.

Lastly, examining the record low temperatures recorded in various cities can also provide insights into the coldest city. By considering the lowest temperatures ever recorded, we can identify the city that has experienced the most extreme cold conditions.

It's important to note that the coldest city in the United States may vary depending on the specific statistical measure used. While some cities may have the lowest average annual temperature, others might experience colder winters or have more extreme record low temperatures. Therefore, it's necessary to consider multiple factors and statistical measures when determining the coldest city.

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The identity 2 cos 2θ = 4cos²θ-2 can be verified using the following steps:

Use the trigonometric identity cos 2θ = 2cos²θ - 1.

Simplify the right-hand side of the equation.

Simplify the left-hand side of the equation.

Compare the two sides of the equation to verify that they are equal.

The first step is to use the trigonometric identity cos 2θ = 2cos²θ - 1. This identity states that the cosine of twice an angle is equal to two times the cosine squared of the angle minus one.

The second step is to simplify the right-hand side of the equation. This can be done by using the distributive property and combining like terms.

The third step is to simplify the left-hand side of the equation. This can be done by using the double angle formula for cosine, which states that cos 2θ = 1 - 2sin²θ.

The fourth step is to compare the two sides of the equation to verify that they are equal. After simplifying both sides, we get the following equation:

2cos²θ - 1 = 1 - 2sin²θ

This equation is true because both sides are equal to 1 - 2sin²θ. Therefore, the identity 2 cos 2θ = 4cos²θ-2 is verified.

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To estimate the life span of a cat with a heart rate of 126 beats/min, we need to use the given data and the equation form r s = k, where r represents the heart rate, s represents the life span, and k is a constant.

From the table, we can identify pairs of heart rate and life span values. By observing the relationship between heart rate and life span, we can estimate the value of k. Once we have the value of k, we can substitute the given heart rate of 126 beats/min into the equation r s = k and solve for the life span, s.

However, without the specific data from the table or the value of k, I'm unable to provide a precise estimate or the exact expression to find the life span of a cat with a heart rate of 126 beats/min. If you could provide the necessary data or additional information, I would be able to assist you further in estimating the life span.

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The percentage increase in points for Lois is approximately 155.6%.

To find the percentage increase in points, we need to calculate the difference between the new score and the initial score, and then divide that difference by the initial score. Finally, we multiply the result by 100 to express it as a percentage.

Initial score: 18 points

New score: 46 points

Difference in points: 46 - 18 = 28

Percentage increase = (Difference / Initial score) * 100

Percentage increase = (28 / 18) * 100

Percentage increase = 1.5556 * 100

Percentage increase ≈ 155.6%

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Answer:

x² + y² = 10

Step-by-step explanation:

the equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

here (h, k ) = (0, 0 ) and r = [tex]\sqrt{10}[/tex] , then

(x - 0)² + (y - 0)² = ([tex]\sqrt{10}[/tex] )² , that is

x² + y² = 10

(a) The net change between the given values of the variable is (4/a) – 4. (b) The average rate of change between the given values of the variable is ((4/a) – 4)/(a – 1).



(a) To determine the net change between the given values of the variable, we need to find the difference in the function values at those points.
Given function: g(x) = 4/x
Let’s evaluate the function at x = 1 and x = a:
At x = 1:
G(1) = 4/1 = 4
At x = a:
G(a) = 4/a
The net change is the difference between g(a) and g(1):
Net change = g(a) – g(1) = (4/a) – 4

(b) The average rate of change between the given values of the variable is determined by finding the slope of the line connecting the two points on the graph of the function.
Let’s calculate the average rate of change using the formula:
Average rate of change = (g(a) – g(1))/(a – 1)
Substituting the values we found earlier:
Average rate of change = ((4/a) – 4)/(a – 1)

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It is the property of circle that points are equidistant from point A .

Given,

Relationship between set of points and A .

Here,

A circle is the set of all points in a plane that are equidistant from a given point called the center of the circle.

Radius is the length from center of circle to any point on the surface . Diameter is double of radius touching to points of a circle and passing through center .

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Answer:

x²-4x+5

Step-by-step explanation:

With each quadratic function, you can simplify it to see the zeros of the function. Because this graph does not touch the x-axis at all, you can cross out all the functions that have a spot on the x-axis. This includes x²-6x+5, -x²-2x+3, x²+4x-5. Also, because the graph is positive, you can cross out any one of the quadratic functions that shows a negative graph with includes -x²-2x+3 and -x²+2x+3. Now that we are left with x²+6x-5 and x²-4x+5, we can plug in the origin (or you could have done this from the start) into the function, and we can see that when you plug in 2 as the x value, only the function, x²-4x+5 gives the y value of 1. Therefore, this is the answer.

Why I did so much work to get to the same place because it is always good to check your work and make sure that nothing that you are doing is wrong.

The equation of the curve that satisfies the condition is [tex]y = 4e^{4x^{14}}[/tex]

From the question, we have the following parameters that can be used in our computation:

dy/dx = 56yx¹³

Rewrite as

dy/y = 56x¹³ dx

Integrate both sides of the equation

So, we have

ln(y) = 56x¹⁴/14 + c

Evaluate the quotient

ln(y) = 4x¹⁴ + c

Take the exponent of both sides

[tex]y = e^{4x^{14} + c[/tex]

Expand

[tex]y = e^{4x^{14}} * e^c[/tex]

This gives

[tex]y = ke^{4x^{14}}[/tex]

The y-intercept is 4

So, we have

[tex]ke^{4 * 0^{14}} = 4[/tex]

k = 4

So, we have

[tex]y = 4e^{4x^{14}}[/tex]

Hence, the equation of the curve is [tex]y = 4e^{4x^{14}}[/tex]

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A. If f is a factor of g, and g is a factor of h, then f is a factor of h.

B. In order to understand why the statement is true, let's consider the definitions of factors and divisibility.

If f is a factor of g, it means that g can be divided evenly by f without leaving a remainder.

Similarly, if g is a factor of h, it means that h can be divided evenly by g without leaving a remainder.

Now, if f is a factor of g and g is a factor of h, it implies that g can be divided evenly by f and h can be divided evenly by g.

Combining these two statements, we can conclude that h can also be divided evenly by f. Therefore, f is a factor of h.

This can be understood by considering the transitive property of divisibility. If a number x is divisible by another number y, and y is divisible by z, then x is also divisible by z.

In this case, f is divisible by g, and g is divisible by h, so f must also be divisible by h.

Therefore, the statement "f is a factor of h" must be true in this scenario.

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In this simulation, we will represent correct answers as "C" and incorrect answers as "I." The quiz will consist of five true-or-false questions. To find the experimental probability of getting at least three correct answers,

we will repeat the quiz multiple times and keep track of the number of times we obtain three or more correct answers. The experimental probability is then calculated by dividing the number of successful outcomes by the total number of trials.

Running the simulation for a large number of trials, let's say 10,000, we will randomly guess the answers for each question. For each trial, we count the number of correct answers. If the count is three or greater, we consider it a successful outcome.

After running the simulation with 10,000 trials, we record the number of successful outcomes and divide it by the total number of trials. This provides us with the experimental probability of getting at least three correct answers on the quiz when guessing randomly.

By calculating the experimental probability through simulation, we can estimate the likelihood of obtaining three or more correct answers on a five-question true-or-false quiz when guessing randomly.

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The measure of the angle GEH in a rectangle EFGH, with vertices marked in order, is 33°.

By applying the basic properties of rectangles, we can easily figure out the solution to this problem.

Firstly, whenever a rectangle is mentioned in a question with its vertices, it should always be used in the order given. So, the rectangle EFGH means, the vertices go in the same order, in a clockwise direction. A random order of vertices would affect all measurements which are given or are to be taken later.

So, in the given rectangle, we see that EG AND FH are the diagonals, which can also be marked for the convenience of marking angles.

(The diagram has been given below for reference)

Since we have m∠FEG = 57° (read as 'the measure of angle FEG is 57 degrees'), we need to find the other angle associated with the same diagonal EG and vertex E.

We know that the angle at any vertex of a rectangle with its sides is a right angle, which is part of its basic property.

So, m∠FEH = 90°

But since ∠GEH and ∠GEF are co-joint,

m∠GEH + m∠GEF = m∠FEH

m∠GEH + 57° = 90°

m∠GEH = 90 - 57

m∠GEH = 33°

Thus, the measure of the angle ∠GEH is 33° in the rectangle.

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Permutations and combinations are two fundamental concepts in combinatorial mathematics used to count and arrange objects in different ways.

While they share similarities, they have distinct characteristics and applications. Permutations refer to the arrangement of objects in a specific order. They are concerned with the order in which objects are selected or arranged. In a permutation, the order matters, and each arrangement is considered distinct. For example, arranging a group of people in a line or selecting a committee with specific positions would involve permutations.

The number of permutations is calculated using the factorial function and is denoted by nPr, where n represents the total number of objects and r represents the number of objects to be selected or arranged. On the other hand, combinations focus on the selection of objects without considering the order. Combinations are concerned with choosing objects from a set without regard to their arrangement. In a combination, the order does not matter, and different arrangements that have the same objects are considered equivalent.

For example, selecting a group of students to form a study group or choosing a committee without specific positions would involve combinations. The number of combinations is calculated using the combination formula and is denoted by nCr, where n represents the total number of objects and r represents the number of objects to be selected.

Permutations involve arranging objects in a specific order, considering the order of selection or arrangement, while combinations involve selecting objects without considering the order, focusing solely on the selection itself. Permutations emphasize the distinct arrangements, while combinations focus on the number of ways to select objects from a set.

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To find the diameter of a circle given its area, we can use the following formula:

Area = π * (radius)^2

However, since we are given the area of the circle and not the radius, we need to rearrange the formula to solve for the radius first:

radius = √(Area / π)

Substituting the given area of 256 square inches into the formula:

radius = √(256 / π)

Now, to find the diameter, we simply double the radius:

diameter = 2 * radius

Let's calculate it:

radius = √(256 / π) ≈ 9.06 inches (rounded to two decimal places)

diameter = 2 * radius ≈ 2 * 9.06 ≈ 18.12 inches (rounded to two decimal places)

Therefore, the diameter of the circle with an area of 256 square inches is approximately 18.12 inches.

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The simplified expression (3i)² - 3(1 + 5i) simplifies to -12 - 15i.

To simplify the expression (3i)² - 3(1 + 5i), we can start by expanding and simplifying each term:

(3i)² = (3i)(3i) = 9i²

Now, recall that i² is defined as -1, so we can substitute this value:

9i² = 9(-1) = -9

Next, let's simplify the second term:

3(1 + 5i) = 3 + 15i

Now we can combine the simplified terms:

(-9) - 3 - 15i = -12 - 15i

Therefore, the simplified expression is -12 - 15i.

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The minimum and maximum possible body temperatures that are within 2 standard deviations of the mean is given as

Minimum temperature = 97.04˚F

Maximum temperature = 99.28˚F

At least 75% of healthy adults have temperatures within 2 standard deviations of 98.16˚F(it's mean).

We have,

According to a random sample taken at 12 A.M., body temperatures of healthy adults have a bell-shaped distribution with a mean of 98.16˚F and a standard deviation of 0.56˚F.

Let the random variable be X which tracks the body temperature.

Then we have:

E(X) = expected value of X  = 98.16˚F

The standard deviation of X   = 0.56˚F

The minimum temperature and maximum temperature within  2 standard deviations of the mean is,

The maximum value of that range would be simply μ + 2s, where μ is the mean and s the standard deviation. In the same way, the minimum value would be μ - 2s:

maximum = μ + 2s = 98.16˚F + 2*0.56˚F = 99.28˚F

minimum = μ - 2s = 98.16˚F - 2*0.56˚F  = 97.04˚F

And, Chebyshev’s Theorem establishes that at least 1 - 1/k²  of the population lies among k standard deviations from the mean.

This means that for k = 2,  

1 - 1/4 = 0.75.

In other words, 75% of the total population would be the percentage of healthy adults with body temperatures that are within 2 standard deviations of the mean.

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Complete question is,

According to a random sample taken at 12 A.M., body temperatures of healthy adults have a bell-shaped distribution with a mean of 98.16˚F and a standard deviation of 0.56˚F. Using Chebyshev's theorem, what do we know about the percentage of healthy adults with body temperatures that are within 2standard deviations of the mean? What are the minimum and maximum possible body temperatures that are within 2standard deviations of the mean?At least _______%of healthy adults have body temperatures within 2standard deviations of 98.16˚F.

The pattern we see is that as we go from one place value to the next (ones to tens, tens to hundreds, hundreds to thousands), there is a consistent grouping and bundling of the smaller units to form the larger unit. Each time we move one place value to the left, the quantity represented increases by a factor of 10.

When using place-value blocks to model numbers, we can observe patterns in the arrangement and grouping of the blocks.

1 and 10:

For the number 1, we represent it using a single unit block (also called a "ones" block).

For the number 10, we represent it using a group of ten unit blocks bundled together as a "ten" block.

Pattern: The pattern we see is that 10 ones blocks make up a single ten block.

10 and 100:

To represent the number 10, we use a single ten block.

To represent the number 100, we use a group of ten ten blocks bundled together as a "hundred" block.

Pattern: The pattern we observe here is that 10 ten blocks make up a single hundred block. In other words, 10 tens make a hundred.

100 and 1000:

To represent the number 100, we use a single hundred block.

To represent the number 1000, we use a group of ten hundred blocks bundled together as a "thousand" block.

Pattern: The pattern we observe is that 10 hundred blocks make up a single thousand block. In other words, 10 hundreds make a thousand.

Overall, the pattern we see is that as we go from one place value to the next (ones to tens, tens to hundreds, hundreds to thousands), there is a consistent grouping and bundling of the smaller units to form the larger unit. Each time we move one place value to the left, the quantity represented increases by a factor of 10.

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The compound inequality that describes the range of the given function is 0 ≤ y ≤ 3. This means that y is greater than or equal to 0 and less than or equal to 3. Option (H) correctly represents the range of the function.

To determine the range of the function, we need to analyze the given options (F), (H), and (I). Let's examine each option in detail.

Option (F) -3: This option represents the range as a single value, -3. However, the given function may have a broader range, so this option is not suitable.

Option (H) 0 ≤ y ≤ 3: This compound inequality represents the range of the function. It states that y is greater than or equal to 0 and less than or equal to 3. This means that all possible values of y for the given function fall within this range.

Option (I) 5 ≤ y ≤ 6: This compound inequality does not accurately describe the range of the function. It suggests that y is greater than or equal to 5 and less than or equal to 6, which may not include all possible values of y for the given function.

Therefore, the correct compound inequality that describes the range of the function is 0 ≤ y ≤ 3. It encompasses all possible values of y that the function can take.

In conclusion, the range of the given function is represented by the compound inequality 0 ≤ y ≤ 3. It states that y is greater than or equal to 0 and less than or equal to 3. Any value of y within this range satisfies the given function.

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√7x³ can be expressed in the exponential form as [tex](7x)^{3/2}[/tex].

Exponential form is a form of expressing a number in the base raised to an exponent form. The example for this will be [tex]a^{b}[/tex] where 'a' is the base and 'b' is the exponent. It simply means how many times the base is multiplied by itself.

Some of the examples of Exponential form are:

[tex]\sqrt{2}[/tex] = [tex]2^{1/2}[/tex]

So,  √7x³ can be expressed in the exponential form as:

[tex](\sqrt{7x} )^3[/tex]

[tex]((7x)^{1/2})^3[/tex]

[tex](7x)^{3/2}[/tex]

Therefore, the exponential form of √7x³ is  [tex](7x)^{3/2}[/tex].

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A system that could be used to find the two numbers include the following:

C. x - 3y = 0

   x - y = 6

In order to write a system of linear equations to describe this situation, we would assign variables to the smaller number and larger number, and then translate the word problem into an algebraic equation as follows:

Since the sum of two positive integers is twice their difference, a linear equation to describe this situation can be written as follows;

x + y = 2(x - y)

x + y = 2x - 2y

2x - x = y + 2y

x = 3y

x - 3y = 0

Since the larger number is 6 more than the smaller number, we have:

x = y + 6

x - y = 6

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

Statistical experiments are done on the basis of the real data for the analysis it is done for the purpose of decision making and to draw samples. It is collection of data that usually is used for the purpose of the index.

The process of collecting the data to analysis of the information is called the statistical experiment that involves various steps. The first step is to find the introduction of the topic and then to find the random variables from the stationary, ergodic and deterministic process that are required for the process. For any type of study the first step is to collect the data. Here there two types of data that is primary and secondary data.

After the data is collected the next step is to classify the data according to the group. The next step after classifying or grouping the data is analyzing the data and summarizing the data collected they the major steps that helps the reviewer to understand the data easily and take the decisions about the analysis. The data must be collected according to the principles of experiments that to control, selections done randomly and also random assignments must be followed by the statistician.

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The row numbers along the left side of the worksheet are 1, 2, 4, 5, 6. We can observe that there is a missing number in the sequence, specifically the number 3. Therefore, based on the pattern, we can deduce that row 3 is missing from the worksheet.

Based on the given information, the row numbers along the left side of the worksheet are 1, 2, 4, 5, 6, with a missing number in the sequence, which is the number 3.

The presence of the numbers 1, 2, 4, 5, and 6 indicates that rows corresponding to those numbers exist in the worksheet. However, there is no row with the number 3 mentioned in the sequence. Thus, we can conclude that row 3 is missing from the worksheet.

It is important to note that the missing row could be intentional or accidental, but based on the given information, we can deduce that there is a discontinuity in the row numbering, specifically the absence of row 3.

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The perimeter of the regular hexagon is approximately 48.5 feet.

A regular hexagon is simply "a closed shape polygon which has six equal sides and six equal angles."

The area of the hexagon formula is expressed as:

Area = 1/2 × perimeter × apothem

Given that:

Area of the regular hexagon = 169.74 ft²

Apothem = 7ft

Perimeter =?

Plug the given values into the above formula and solve for the perimeter.

Area = 1/2 × perimeter × apothem

169.74 = 1/2 × perimeter × 7

2 × 169.74 = 2 × 1/2 × perimeter × 7

339.48 = perimeter × 7

Perimeter = 339.48 / 7

Perimeter = 48.5 ft

Therefore, the perimeter is 48.5 feet.

Learn more about regular hexagons here: https://brainly.com/question/28017892

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Answer:

[tex] - \frac{1}{3} \geqslant - \frac{2}{5} y[/tex]

[tex] \frac{5}{3} \leqslant 2y[/tex]

[tex]y \geqslant \frac{5}{6} [/tex]