In interval estimation, the t distribution is applicable only when a. the variance of the population is known b. the sample standard deviation is used to estimate the population standard deviation c. the standard deviation of the population is known d. the population has a mean of less than 30

Answer:

The IQR is calculated as the difference between the third quartile (Q3) and the first quartile (Q1). In this case, the box extends from 17 to 20, so Q1 is 17 and Q3 is 20. Thus, the IQR is 20 - 17 = 3.

Therefore, the appropriate measure of variability for the data is the IQR, and its value is 3.

Option A ("The IQR is the best measure of variability, and it equals 3") is the correct answer

Step-by-step explanation:

i am seeking friends , add me on sn ap = m_oonlight781 and we can do school stuffs together

The statement "The functional dependency noted as A->B means that the value of A can be determined from the value of B" is false. In the context of databases and relational schema, functional dependencies are used to express constraints between attributes in a relation.  

False. The functional dependency noted as A->B means that the value of B can be determined from the value of A. In other words, A determines the value of B, and B is functionally dependent on A. This concept is important in database design as it helps to ensure that the data is organized in a logical and efficient manner.

By identifying functional dependencies, we can minimize data redundancy and ensure that the data is consistent and accurate. It also helps in the normalization process, which is a technique used to reduce data redundancy and ensure data integrity. Overall, understanding functional dependencies is essential for effective database design and management.

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Answer: 79,364 Jaguars

Step-by-step explanation:

70000

00004

09000

00060

00300

Add them all together for the answer

The standard deviation of a standard normal distribution (b) is always equal to one. The correct answer is (b) is always equal to one.

The standard deviation of a standard normal distribution is always equal to one. A standard normal distribution is a normal distribution with a mean of zero and a standard deviation of one. This distribution is commonly used in statistical analysis and is characterized by a bell-shaped curve. The curve is symmetric, with the highest point at the mean, and the spread of the distribution is determined by the standard deviation.

The standard deviation is a measure of the variability or spread of the data. In a normal distribution, about 68% of the data falls within one standard deviation of the mean, and about 95% falls within two standard deviations. Therefore, the standard deviation is an important parameter that helps describe the distribution of the data.

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The Taylor series for In (1+7%) at x = 0.To use substitution to find the Taylor series at x = 0 of the function In (1+7x), we first need to find the derivatives of the function at x = 0. We have:

f(x) = In (1+7x)
f'(x) = 7/(1+7x)
f''(x) = -49/(1+7x)^2
f'''(x) = 343/(1+7x)^3

Using the Taylor series formula, we can write:

In (1+7x) = f(0) + f'(0)x + (f''(0)/2!)x^2 + (f'''(0)/3!)x^3 + ...

Plugging in the derivatives we found, we get:

In (1+7x) = 0 + 7x - 49/2 x^2 + 343/6 x^3 + ...

This is the Taylor series at x = 0 for In (1+7x).

The general expression for the rith term in the Taylor series at x = 0 for In (1+7x) is:

f^(r)(0)/r! * x^r

Where f^(r)(0) denotes the r-th derivative of f(x) evaluated at x = 0.

The Taylor series for In (1+7%) is the same as the Taylor series for In (1+7x), with x replaced by 0.01x. So we have:

In (1+7%) = In (1+0.07x)

Using the Taylor series we found earlier, we can write:

In (1+0.07x) = 0 + 0.07x - 0.001225 x^2 + 0.00016807 x^3 + ...

This is the Taylor series for In (1+7%) at x = 0.

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The value of x in the parallelogram is: 18

Length of XY = 45 units

Length of WX = 51 units

A parallogram can simply be described as a quadrilateral that has two pairs of parallel sides which are also equal to each other in length.

Thus, sides WX and YZ will be parallel and equal sides in parallogram WXYZ, therefore:

WX = YZ

Substitute:

2x + 15 = 4x - 21

Combine like terms:

2x - 4x = -15 - 21

-2x = -36

-2x/-2 = -36/-2

x = 18

Length of XY = x + 27 = 18 + 27 = 45 units

Length of WX = 2x + 15 = 2(18) + 15 = 51 units

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Answer:

The second graph (the graph of the sinusoid) represents a function.

Answer:

The first one.

Step-by-step explanation:

The first one is the function x = -6. The rest of the graphs were too inconsistent.

There are 11 tests taken during the semester ratio.

If the ratio of quizzes to tests is 6:1, then the total number of parts in the ratio is 6+1 = 7.

Let x be the number of parts that represent quizzes, and y be the number of parts that represent tests. Then we have:

x + y = 7 (because there are 7 total parts in the ratio)

x/y = 6/1 (because the ratio of quizzes to tests is 6:1)

Simplifying the second equation, we get:

x = 6y

Substituting this into the first equation, we get:

6y + y = 7

7y = 7

y = 1

So the number of parts that represent tests is 1, and the number of parts that represent quizzes is 6. Therefore, if there are 77 grades taken during the semester, then there is 1/7 of the grades taken for each part of the ratio.

The number of grades for tests is:

1/7 × 77 = 11

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The number that was coded is 45.

First, note that if you raise any integer between 1 and 76 to the power 17, the result will be an integer with many digits.

However, since we are reducing the result modulo 77, we only need to consider remainders when dividing this large number by 77.

To compute the remainder when raising a number to a power modulo 77, you can use the repeated squaring algorithm. Here's how it works:

Start with the base number, which is the secret digit you want to code (let's call it x).

Compute [tex]x^2[/tex] modulo 77.

Compute[tex](x^2)^2[/tex] modulo 77.

Repeat step 3 a total of 15 times. At this point, you have computed x^16 modulo 77.

Multiply [tex]x^{16}[/tex] by x modulo 77 to get [tex]x^{17}[/tex] modulo 77.

Alternatively, you can use a built-in function in most programming languages to compute modular exponentiation.

For example, in Python, you can use the pow() function with three arguments: the base, the exponent, and the modulus. Here's how you can use it:

x = 25  

for i in range(1, 77):

   if pow(i, 17, 77) == x:

       print(i)

       break

This code will print the secret digit that corresponds to the remainder of 25 when raised to the power of 17 and reduced modulo 77, which is 45.

Therefore, the number you coded is 45.

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Answer:

112cm square/sec

Step-by-step explanation:

Area of a square is expressed as A = L² where L is the length of one side of the square.

The rate of change of area will be expressed  using chain rule as;

dA/dt = dA/dL * dL/dt where;

dL/dt is the rate at which the side length of the square is decreasing.

Given L = 7cm, dL/dt = 8cm/sec and dA/dL = 2L

dA/dL = 2(7)

dA/dL = 14cm

Substituting the given value into the chain rule expression above to get the rate of change of the area of the square, we will have;

dA/dt = dA/dL * dL/dt

dA/dt = 14cm * 8cm/sec

dA/dt = 112cm²/sec

Hence, the rate of change of the area of the square when the side length is 7 cm is 112cm²/sec

A researcher's results should be considered fraudulent if data were changed in order to support the hypothesis. This is a serious ethical violation and goes against the scientific method. Overall, it is important for researchers to adhere to ethical standards and maintain the integrity of their research.

Explanation:

A researcher's results should be considered fraudulent if data were changed in order to support the hypothesis. This is a serious ethical violation and goes against the scientific method. Additionally, if animals were used while conducting experiments, the researcher should have followed ethical guidelines and obtained proper approval and care for the animals. If a survey was used to collect data, the researcher should have ensured the survey was properly designed and administered to avoid any biases or errors. Finally, if participants were not debriefed after completion of the study, this could be seen as unethical and potentially harmful to their well-being. Overall, it is important for researchers to adhere to ethical standards and maintain the integrity of their research.

The scientific method requires researchers to conduct experiments in a transparent and objective manner. This means that the researcher should design experiments to test hypotheses, collect data systematically, and analyze data objectively. Any manipulation of data to support a hypothesis undermines the scientific method and is considered unethical. Researchers who intentionally manipulate data can be considered fraudulent and may face disciplinary action.

If animals were used in the experiment, the researcher should have followed ethical guidelines and obtained proper approval and care for the animals. Ethical guidelines ensure that animals are treated humanely, minimize their pain and discomfort, and maximize their welfare. Researchers who violate these guidelines can be considered fraudulent and may face disciplinary action.

If a survey was used to collect data, the researcher should have ensured that the survey was properly designed and administered to avoid any biases or errors. Surveys can be susceptible to various sources of error, including sampling errors, measurement errors, and non-response bias. Researchers who fail to address these sources of error can produce biased or invalid results, which can be considered fraudulent.

Finally, if participants were not debriefed after completion of the study, this could be seen as unethical and potentially harmful to their well-being. Debriefing allows participants to understand the purpose of the study, ask questions, and voice any concerns they may have. Participants who are not debriefed may feel deceived or harmed by the study, which can damage their trust in research and researchers.

In summary, researchers must adhere to ethical standards and maintain the integrity of their research. This includes avoiding data manipulation, following ethical guidelines for animal welfare, ensuring that surveys are properly designed and administered, and debriefing participants after completion of the study. Failure to do so can result in fraudulent research and harm to participants, animals, and the scientific community as a whole.

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In a standard 52-card deck, there are 20,358 ways to pick an (unordered) subset of 6 cards that contains at least one Ace, at least one King, at least one Queen, and at least one Jack.

When selecting a subset of 6 cards from a standard 52-card deck, the main objective is to ensure that the subset contains at least one Ace, one King, one Queen, and one Jack. To calculate the number of ways this can be achieved, we can break it down into steps.

Step 1: Select one Ace, King, Queen, and Jack

There are 4 ways to choose one Ace, 4 ways to choose one King, 4 ways to choose one Queen, and 4 ways to choose one Jack.

Step 2: Select two additional cards from the remaining 48 cards

After selecting one Ace, one King, one Queen, and one Jack, we are left with 48 cards. To complete the subset of 6 cards, we need to choose two more cards from this remaining set. The number of ways to select two cards from 48 is calculated using combinations, denoted as "48 choose 2," which is equal to 1,128.

Step 3: Multiply the results

To determine the total number of ways, we multiply the results of each step. Therefore, the total number of ways to pick an (unordered) subset of 6 cards that contains at least one Ace, one King, one Queen, and one Jack is 4 * 4 * 4 * 4 * 1,128 = 20,358.

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the P-value ranges suggest that the specific P-value depends on the outcome of the chi-square test. The independence of occupations and personality preferences at the 0.01 level of significance.

To determine if the listed occupations and personality preferences are independent at the 0.01 level of significance using the chi-square test, follow these steps:

1. Create a contingency table with the observed frequencies of each occupation and personality preference combination.

2. Calculate the expected frequencies for each combination by multiplying the row total and column total, and then dividing by the grand total.

3. Compute the chi-square test statistic (χ²) using the formula: χ² = Σ[(observed - expected)² / expected]. Sum this value for all combinations in the table.

4. Determine the degrees of freedom (df) by multiplying the number of rows minus one by the number of columns minus one: df = (rows - 1)(columns - 1).

5. Find the critical value for the chi-square test statistic at the 0.01 level of significance using a chi-square distribution table or an online calculator.

6. Compare the calculated χ² value to the critical value. If the χ² value is greater than the critical value, reject the null hypothesis and conclude that the occupations and personality preferences are not independent. Otherwise, fail to reject the null hypothesis and accept that they may be independent.

7. Estimate the P-value of the sample test statistic by finding the probability of obtaining a χ² value as extreme as or more extreme than the calculated value from the chi-square distribution table or an online calculator.

Based on the given group of answer choices, the P-value ranges suggest that the specific P-value depends on the outcome of the chi-square test. Conduct the test as described above to determine the P-value and make a conclusion regarding the independence of occupations and personality preferences at the 0.01 level of significance.

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A mathematical operation that is easily performed but highly unlikely to reverse in a reasonable amount of time is known as a "one-way function." One-way functions are fundamental to cryptography, particularly in areas like secure hashing and public-key encryption. These functions are designed to be simple and efficient to compute in one direction but extremely difficult and time-consuming to reverse.

A prime example of a one-way function is the multiplication of two large prime numbers. Multiplying them is a straightforward task, but attempting to factorize the product back into its original primes, known as the "prime factorization problem," is considered computationally infeasible for large numbers. This asymmetry in complexity is utilized in cryptographic systems, such as the RSA encryption algorithm, to ensure the security of sensitive information.

In summary, one-way functions are mathematical operations that can be easily performed but are highly challenging to reverse. Their properties make them invaluable in the realm of cryptography, where they provide the foundation for secure communication and data protection.

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If the inflation rate is positive, purchasing power decreases. This situation is reflected in the rate of return on an investment, which will be the real rate of return.

When inflation is present, the purchasing power of money decreases which means that the same amount of money can buy fewer goods and services than before.

Nominal rate of return on an investment is the actual percentage increase in the value of the investment but the real rate of return takes into account the effects of inflation.

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Answer:

hope it helps you

Step-by-step explanation:

......

Accountants are not strictly required to understand data mining, but it is becoming increasingly important and beneficial for them to do so. Data mining allows accountants to analyze large sets of data and identify patterns, trends, and relationships within the data. Regression analyses, as a part of data mining, help in understanding the relationships between variables and making predictions.

Having knowledge of data mining and regression analyses can help accountants:
1. Improve decision-making processes by providing data-driven insights.
2. Enhance fraud detection and prevention by identifying unusual patterns and anomalies.
3. Optimize financial planning and forecasting by using historical data to make accurate predictions.
4. Increase efficiency and save time by automating routine tasks and data analysis.

In conclusion, while accountants are not necessarily required to understand data mining, doing so can greatly enhance their skills and the value they provide in their profession. Learning about data mining techniques, such as regression analyses, can help accountants make more informed decisions, detect fraud, and improve financial planning.

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The missing vertex of the rectangle is equal to D(x, y) = (- 13, 18). (Correct choice: B)

In this problem we find the case of rectangle with three vertices at following points: A(x, y) = (- 25, 18), B(x, y) = (- 13, - 9) and C(x, y) = (- 25, 9). The four vertices of the rectangle can be found by following expression:

A(x, y) = (a, b), B(x, y) = (c, d), C(x, y) = (a, d), D(x, y) = (c, b)

If we know that a = - 25, b = 18, c = - 13 and d = - 9, then the location of the missing point is:

D(x, y) = (- 13, 18)

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Answer:

D) 408

E) 684

F) 377

Step-by-step explanation:

In these problems, we can simplify the multiplication using these steps:

1. split each number into a tens and ones place

2. multiply each place of the bottom number by both places of the top number (but remember that a digit in the tens place has a zero after it)

3. add the resulting values

D) First, we can split each number into a tens and ones place:

17 = 10 and 7

24 = 20 and 4

Next, we can multiply each digit of the bottom number by both digits of the top number:

(4 × 7)

(4 × 10)

(20 × 7)

(20 × 10)

Finally, we can add all of these values:

(4 × 7) + (4 × 10) + (20 × 7) + (20 × 10)

= 28   +     40    +     140    +     200

= 408

E)

36 = 30 and 6

19 = 10 and 9

Multiplying the places:

(9 × 6)

(9 × 30)

(10 × 6)

(10 × 30)

Adding these values:

(9 × 6) + (9 × 30) + (10 × 6) + (10 × 30)

= 54    +    270    +    60     +    300

= 684

F)

29 = 20 and 9

13 = 10 and 3

Multiplying the places:

(3 × 9)

(3 × 20)

(10 × 9)

(10 × 20)

Adding these values:

(3 × 9) + (3 × 20) + (10 × 9) + (10 × 20)

= 27    +    60      +     90    +    200

= 377

The probabilities of the given events involving red marbles, blue marbles, odd-numbered marbles, and even-numbered marbles.

(a) The probability that the marble is red is [tex]\frac{3}{8}[/tex]. To find this, you need to divide the number of red marbles (6) by the total number of marbles (16). So, [tex]\frac{6}{16}=\frac{3}{8}[/tex].

(b) The probability that the marble is odd-numbered is [tex]\frac{1}{2}[/tex]. To find this, count the odd-numbered marbles: 3 red (1, 3, 5) and 5 blue (1, 3, 5, 7, 9). So, there are 8 odd-numbered marbles. Divide this by the total number of marbles (16), giving [tex]\frac{8}{16}=\frac{1}{2}[/tex].

(c) The probability that the marble is red or odd-numbered is [tex]\frac{11}{16}[/tex]. First, find the number of marbles that are red or odd-numbered: all 6 red marbles plus the 5 odd-numbered blue marbles (subtract 1 as blue marble number 1 was counted twice). This results in 10 unique marbles. So, the probability is [tex]\frac{5}{8}[/tex] .

(d) The probability that the marble is blue or even-numbered is [tex]\frac{1}{2}[/tex]. This is complementary to the probability found in (c). Since the marble can only be red or odd-numbered, or blue or even-numbered, the probabilities must sum to 1. So, [tex]1 - \frac{5}{8}  = \frac{1}{2}[/tex].

Your corrected answers are: (a) [tex]\frac{3}{8}[/tex], (b) [tex]\frac{1}{2}[/tex], (c) [tex]\frac{5}{8}[/tex], and (d) [tex]\frac{1}{2}[/tex].

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Answer:

0.12 grams of Vitamin C.

Step-by-step explanation:

tell me if i am right

The average daily earning for the electrician is $303.10.

To find the average daily earning, we first need to find the total earnings for the week.

The electrician worked a total of 35 hours during the week (8 + 7 + 5.5 + 10 + 4.5 = 35).

Multiplying the total hours worked by the hourly rate gives us the total earnings for the week:

35 hours x $43.30/hour = $1,515.50

To find the average daily earning, we divide the total earnings by the number of days worked.

The electrician worked 5 days during the week, so:

$1,515.50 / 5 days = $303.10

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The standard error of the mean represents a measure of the precision of the sample mean as an estimate of the population mean.

It is the standard deviation of the sampling distribution of the means, and it decreases as the sample size increases. In other words, it reflects how much the sample mean is likely to deviate from the true population mean due to chance variation. On the other hand, the standard deviation represents a measure of the variability or dispersion of the data points around the mean. It is the square root of the variance, and it indicates how much the observations deviate from the mean on average. Thus, while the standard error of the mean focuses on the accuracy of the estimate, the standard deviation describes the spread of the data.

The standard error of the mean represents a measure of the variability of the mean estimates across different samples, while the standard deviation represents a measure of the variability of individual data points within a single sample. The standard error helps to determine the precision of the mean estimate and is influenced by both the standard deviation and the sample size. In contrast, the standard deviation provides insight into the dispersion of data points around the mean within a given sample, and is useful for understanding the spread of the data. Both metrics are important in statistical analysis and hypothesis testing.

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Answer:6/l per min??

Step-by-step explanation:

If the heart rate is 72 beats per minute and the stroke volume 81 mL per beat, then the cardiac output is 5.8 liters per minute, rounded to the tenths place.

Explanation:

Cardiac output (CO) is the volume of blood pumped by the heart per minute. It is the product of the heart rate (HR) and the stroke volume (SV).

HR (heart rate) is the number of heart beats per minute, and SV (Stroke volume) is the volume of blood pumped out by the heart with each beat. To calculate CO, we simply multiply HR by SV.

In this case, the given heart rate is 72 beats per minute, and the stroke volume is 81 mL per beat. To calculate the cardiac output, we need to convert the stroke volume from mL per beat to L per beat by dividing it by 1000 (since there are 1000 mL in a liter):

Stroke volume (SV) = 81 mL/beat ÷ 1000 mL/L = 0.081 L/beat

The cardiac output can be calculated by multiplying the heart rate by the stroke volume. Therefore, the cardiac output in this case would be:

Cardiac output (CO) = Heart rate (HR) x Stroke volume (SV)

= 72 beats/min x 0.081 L/beat

= 5.832 L/min

Therefore, the cardiac output is 5.8 liters per minute, rounded to the tenths place.

To summarize, we can calculate the cardiac output by multiplying the heart rate (HR) and the stroke volume (SV), where SV is the volume of blood pumped out by the heart with each beat, and HR is the number of heart beats per minute. In this case, the given HR is 72 beats per minute, and the stroke volume is 81 mL per beat, so we first convert the SV to L per beat and then multiply HR and SV to get the cardiac output, which is 5.8 liters per minute.

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Answer:

After 5 years Victoria will have $339.68125

Step-by-step explanation:

As per the question,

The principal amount is $300

The rate of Interest is 2.5%

Interest compounded per year = 2
Time = 5 years

Now, as per the compound interest formula,

Total money after 5 years = 300 {(1+2.5/100)/2) power 2.5 = 399.68125

Therefore Victoria after 5 years will be having $ 399.68125

To simulate the weight of a random pet from the store, we can use the composition method.We can use a random number generator to generate a PRN between 0 and 1. If the PRN is less than or equal to 0.6, then we know the pet is a cat, and if it is greater than 0.6, then the pet is a dog.

Once we know the type of the pet, we can use the corresponding normal distribution to simulate its weight. If the pet is a cat, we can use the normal distribution Nor(12,4) to generate a PRN that represents the weight of the cat. If the pet is a dog, we can use the normal distribution Nor(30,25) to generate a PRN that represents the weight of the dog.

To generate a PRN from a normal distribution with mean μ and standard deviation σ, we can use the inverse transform method. First, we generate a PRN u from the standard normal distribution using the standard normal c.d.f. denoted by Φ. Then, we can compute the desired PRN x by using the formula x = μ + σΦ⁻¹(u).

Therefore, to simulate the weight of a random pet from the store using composition, we can follow these steps:

1. Generate a PRN u between 0 and 1 using a random number generator.
2. If u ≤ 0.6, then the pet is a cat. Generate a PRN x from the normal distribution Nor(12,4) using the inverse transform method.
3. If u > 0.6, then the pet is a dog. Generate a PRN x from the normal distribution Nor(30,25) using the inverse transform method.
4. The value of x represents the weight of the random pet from the store.

To simulate the weight of a random pet from "It's Raining Cats and Dogs" pet store using composition, follow these steps:

1. Generate a random number (PRN) between 0 and 1. Let's call this PRN1.

2. If PRN1 <= 0.6 (which represents the 60% probability of selecting a cat), we'll simulate the weight of a cat. If PRN1 > 0.6 (which represents the 40% probability of selecting a dog), we'll simulate the weight of a dog.

3. To simulate the weight of a cat or a dog, we'll generate another random number (PRN) between 0 and 1. Let's call this PRN2.

4. For a cat (if PRN1 <= 0.6), apply the inverse standard normal c.d.f. to PRN2 to obtain a standard normal random variable, Z. Then, calculate the cat's weight using the formula: Cat's weight = 12 + 4 * Z, where 12 is the mean weight of cats (μ) and 4 is the standard deviation (σ).

5. For a dog (if PRN1 > 0.6), apply the inverse standard normal c.d.f. to PRN2 to obtain a standard normal random variable, Z. Then, calculate the dog's weight using the formula: Dog's weight = 30 + 25 * Z, where 30 is the mean weight of dogs (μ) and 25 is the standard deviation (σ).

By following these steps, you can simulate the weight of a random pet from "It's Raining Cats and Dogs" pet store using composition.

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The missing side length of the triangle is 5.5 units.

The law of cosines signifies the relation between the lengths of sides of a triangle with respect to the cosine of its angle.

It is expressed as:

c² = a² + b² - ( 2ab × cosC )

From the given triangle:

side a = 9

side b = 6

Angle C = 37 degrees

side c = ?

Plug these values into the above formula and solve for c.

c² = a² + b² - ( 2ab × cosC )

c² = 9² + 6² - ( 2×9×6 × cos(37°) )

c = √( 9² + 6² - ( 2×9×6 × cos(37°) ) )

c = √( 81 + 36 - ( 108 × cos(37°) ) )

c = √( 117 - 86.25)

c = √30.25

c = 5.5

Therefore, the value of side c is 5.5.

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The scale of measurement used for the type of college, i.e., community colleges, 4-year colleges, and universities, is a nominal scale.

A nominal scale is used for variables that can be classified into distinct categories, but there is no inherent order or numerical value associated with them. In this case, the three types of colleges are discrete categories, and there is no inherent order or numerical value assigned to them.

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Two inequalities to compare each set of numbers are x > -14 and x > -90

Set 1

Here, we have

13 and -12

In the above set of numbers, we can see that the numbers are less than 14

So, an inequality is x < 14

Also, the numbers are greater than -14

So, we have

x > -14

Set 2

Here, we have

-83 and -85

In the above set of numbers, we can see that the numbers are less than 0

So, an inequality is x < 0

Also, the numbers are greater than -90

So, we have

x > -90

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