what is meant by the term standard conditions, with reference to enthalpy changes? pp = 1 atmatm , tt = 0 kk . pp = 1 atmatm , tt = 273 kk . pp = 1 atmatm , tt = 298 kk . pp = 1 kpakpa , tt = 273 kk .

Answer:

11

Step-by-step explanation:

The median in a given number set is the middle term within the set.  In this case, there are 9 terms in the set, making the 5th term the median:

7 , 8 , 9 , 9 , 11 , 11 , 12 , 15 , 19

11 would therefore be your answer.

~

Note that if the given number set has a even amount of numbers, then you will find the mean between the two middle numbers. For example, if 20 was added to the given number set, making it 10 terms a set:

7 , 8 , 9 , 9 , 11 , 11 , 12 , 15 , 19 , 20

Then you will add the two middle numbers (11 & 11), and divide by 2:

[tex]\frac{(11 + 11)}{2} = \frac{22}{2} = 11[/tex]

~

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A sequence of random numbers must be uniformly distributed. This means that the numbers have an equal chance of occurring and there is no pattern to their occurrence.

Uniform distribution is important in generating random numbers because it ensures that the numbers are not biased towards any particular value or range. However, it is important to note that while the numbers may appear random, they are actually generated using algorithms that follow specific patterns. These algorithms are designed to mimic the randomness found in nature, but they are not truly random. Therefore, the term "pseudo-random" is used to describe them. In summary, a sequence of random numbers must be uniformly distributed, but they are generated using algorithms that follow patterns.

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To determine a fair amount to pay for playing the game, we need to calculate the expected value, which represents the average outcome of the game. In this game, there are 16 possible outcomes when flipping four coins, ranging from no heads (HHHH) to four heads (TTTT). We win $1 if we ever flip two heads in a row.

To calculate the expected value, we assign a value of $1 to the favorable outcome (two heads in a row) and $0 to all other outcomes. Since there are three ways to achieve two heads in a row (HHHT, THHH, HTHH), the total value for these outcomes is $3. The remaining 13 outcomes have a value of $0.

The probability of getting two heads in a row is 3/16 because there are three favorable outcomes out of 16 total outcomes. Therefore, the expected value is (3/16) * $1 + (13/16) * $0 = $3/16.

A fair amount to pay for playing this game would be equal to the expected value, which is $3/16. This means that on average, if you play this game multiple times, you would expect to win $3 for every 16 games played.

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The correct answer is C. Yes; The business understanding step is the most important because if the problem definition is wrong or misaligned with respect to business outcomes, all subsequent work will be wasted.

The CRISP-DM (Cross-Industry Standard Process for Data Mining) methodology is a widely used framework for conducting data mining projects. It consists of six phases:

Business Understanding

Data Understanding

Data Preparation

Modeling

Evaluation

Deployment

While all phases of the CRISP-DM process are essential and interconnected, the business understanding step holds particular importance. Here's why:

The business understanding phase sets the foundation for the entire project. It involves identifying the business objectives and goals, understanding the project requirements, and defining the problem to be solved. If this initial step is flawed or misaligned with the business outcomes, all subsequent work within the project could be misguided.

Without a clear understanding of the business context and problem, data mining efforts may be focused on the wrong areas, leading to wasted time, resources, and potentially inaccurate or irrelevant results. It is crucial to ensure that the problem definition is accurate, relevant, and aligned with the business objectives. This phase also involves identifying key stakeholders, their requirements, and any constraints or limitations.

By starting with a solid foundation in the business understanding phase, subsequent phases, such as data understanding, data preparation, modeling, evaluation, and deployment, can be executed with a clear understanding of the project's purpose and objectives.

In summary, while all phases of CRISP-DM are vital, the business understanding step is considered the most important as it sets the direction and ensures that subsequent work is aligned with the desired business outcomes.

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The inequality which represents the speed of the driving of willow is y ≤ 75.

Mathematical expressions with inequalities are those in which the two sides are not equal. Contrary to equations, we compare two values in inequality. Less than (or less than or equal to), greater than (or greater than or equal to), or not equal to signs are used in place of the equal sign.

We have, The fastest driving speed of Willow is 75 miles per hour, There is a bit of traffic on her route that might slow her speed down.

So, the inequality which represents the speed of the willow is:

y ≤ 75

Therefore, the inequality which represents the speed of the driving of willow is y ≤ 75.

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a. Probability of getting a sugar cookie from Jar #1: 0 b. Probability of getting a peanut butter cookie from Jar #1: 10/41 c. Probability of getting a chocolate chip cookie from Jar #1: 5/4. d. Probability of getting an oatmeal raisin cookie from Jar #1: 3/41

To find the probabilities for each type of cookie from Jar #1, we first need to calculate the total number of cookies in each jar.

In Jar #1, there are 10 peanut butter cookies, 5 chocolate chip cookies, and 3 oatmeal raisin cookies. So, the total number of cookies in Jar #1 is 10 + 5 + 3 = 18.

In Jar #2, there are 5 peanut butter cookies, 10 chocolate chip cookies, 7 oatmeal raisin cookies, and 1 sugar cookie. So, the total number of cookies in Jar #2 is 5 + 10 + 7 + 1 = 23.

Now, let's calculate the probabilities for each type of cookie from Jar #1:

a. Probability of getting a sugar cookie from Jar #1:

Since there are no sugar cookies in Jar #1, the probability of getting a sugar cookie from Jar #1 is 0.

b. Probability of getting a peanut butter cookie from Jar #1:

There are 10 peanut butter cookies in Jar #1, and the total number of cookies in both jars is 18 + 23 = 41. So, the probability of getting a peanut butter cookie from Jar #1 is 10/41.

c. Probability of getting a chocolate chip cookie from Jar #1:

There are 5 chocolate chip cookies in Jar #1, and the total number of cookies in both jars is 41. So, the probability of getting a chocolate chip cookie from Jar #1 is 5/41.

d. Probability of getting an oatmeal raisin cookie from Jar #1:

There are 3 oatmeal raisin cookies in Jar #1, and the total number of cookies in both jars is 41. So, the probability of getting an oatmeal raisin cookie from Jar #1 is 3/41.

These probabilities represent the likelihood of selecting each type of cookie specifically from Jar #1 when randomly choosing a cookie from either jar.

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Answer: The mean, which is needed to be rounded to the nearest tenth, would be 10.6.

Step-by-step explanation:

Since this question is asking for the mean weight for eight cats, I will simply tell you what is the mean.

A mean of a data set is when you add the total of all of the numbers in the data plot and divide that number by how many numbers you added up. It is painfully a lot of math to do, so that's why it's really MEAN!

In this case, you will need to add "6, 13, 6, 14, 8, 13, 11, & 14" up together to find the total number which is 85.

Now, since there is eight numbers in this data plot, you divide 85 by 8 and you would get 10.625. To the nearest tenth, it would round to 10.6.

Therefore, the pet store's eight cats have an average weight of 10.6 pounds per cat. Hope this helps! :)

-From A Fifth Grade Honors Student

The pooled proportion of subjects who experienced insomnia is 0.0725.

The p-value of the test is approximately 0.376.

To get pooled proportion of subjects who experienced insomnia in this study, we will add the number of insomnia cases from both groups and then divide by the total number of subjects.

The pooled proportion (P) will be:

= (number of males with insomnia + number of females with insomnia) / (total number of males + total number of females)

= (19 males with insomnia + 18 females with insomnia) / (236 males + 274 females)

= 37 / 510

= 0.0725

To know p-value, we first need to calculate the test statistic (Z), then find the p-value associated with that Z score in a standard normal distribution. This is a test for two proportions.

Z = [ (PM - PF) - 0 ] / sqrt[ P*(1 - P)*( (1/nM) + (1/nF) ) ]

PM = 19/236 = 0.0805 (approx)

PF = 18/274 = 0.0657 (approx)

Z = (0.0805 - 0.0657) / sqrt[ 0.0725*(1 - 0.0725)*( (1/236) + (1/274) ) ]

Z = 0.0148 / 0.0167

Z = 0.885

As this is a two-tailed test, we should look for the probability of the absolute Z-score:

= 0.885 * 2

= 1.77

The p-value using the x-score of 1.77 is 0.376.

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Answer:

Huong invests $4,817 in a savings account with a fixed annual interest rate of 3% compounded 2 times per year. This means that the interest is calculated every 6 months and added to the principal amount. The interest rate for each 6-month period is 1.5%.

After 12 years, the account balance will be:

$4,817 * (1 + 0.015)^24 = $6,245.46

The account balance will be $6,245.46 after 12 years.

The dimension of the column space of a matrix is equal to the rank of the matrix as well , Dim Col A is also 2.

The maximum number of rows or columns in a matrix that are linearly independent is the matrix's rank.

Given that the null space of a 7 x 5 matrix is 3-dimensional, we can conclude that the rank of the matrix is:

Rank(A) equals the number of columns minus the size of the null space

= 5 - 3

= 2

So, Rank A is 2.

The dimension of the row space of a matrix is equal to the rank of the matrix. Dim Row A is therefore also 2.

A matrix's rank and the dimension of its column space are both the same.

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.Answer:At t=3, velocity = -70 ft/s and acceleration = 10 ft/s².

Given the distance formula,

s(t) = 80-100t+5t²

The derivative of the distance function with respect to time is the velocity function, s'(t).

a) Velocity, v(t)=s'(t)The derivative of the distance function with respect to time is the velocity function, v(t) or

s'(t).s'(t) = d/dt[80-100t+5t²]s'(t)

= -100 + 10t

b) Acceleration, a(t)=s"(t)

The second derivative of the distance function with respect to time is the acceleration function, a(t) or s"(t).

s"(t) = d²/dt²[80-100t+5t²]

s"(t) = 10

c) Find the velocity and acceleration when t = 3 secondsWhen t = 3 seconds, we have:

v(3) = s'(3)

= -100 + 10t

= -100 + 10(3)

= -70 ft/sa(3)

= s"(3)

= 10 ft/s²

Therefore, the velocity of the object when t = 3 seconds is -70 ft/s and the acceleration of the object when t = 3 seconds is 10 ft/s²

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Rounding up to the nearest integer, the minimum sample size required is 184.

To find the minimum sample size required to estimate a population proportion or percentage with a margin of error of eight percentage points and a confidence level of 90%, we need to use the following formula:
n = [(Z-score)^2 * p * (1 - p)] / (margin of error)^2
where Z-score is the critical value for the desired confidence level, p is the estimated population proportion or percentage from a prior study, and the margin of error is given as eight percentage points.
For a confidence level of 90%, the Z-score is 1.645. Using the given value of p as 0.34, we can substitute these values in the formula to get:
n = [(1.645)^2 * 0.34 * (1 - 0.34)] / (0.08)^2
n = 183.54
Rounding up to the nearest integer, the minimum sample size required is 184.
Answer: The minimum sample size required to estimate a population proportion or percentage with a margin of error of eight percentage points and a confidence level of 90% is 184. This is calculated using the formula n = [(Z-score)^2 * p * (1 - p)] / (margin of error)^2, where Z-score is the critical value for the desired confidence level and p is the estimated population proportion or percentage from a prior study.

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False. the probabilities in the rows corresponding to non-absorbing states can still have non-zero values, representing the possibility of transitioning between non-absorbing states or to absorbing states.

When absorbing states are present in a Markov chain, the rows of the transition matrix corresponding to absorbing states will have a single 1, but it is not necessary that all other probabilities will be 0. In some cases, other probabilities in those rows could be non-zero.

An absorbing state in a Markov chain is a state from which it is impossible to leave once entered. It acts as a "trap" where the process remains indefinitely. The transition matrix of a Markov chain represents the probabilities of transitioning from one state to another.

In a transition matrix, the rows represent the current state, and the columns represent the next state. Each entry in the matrix represents the probability of transitioning from the current state to the next state.

For an absorbing state, the probability of transitioning to itself is 1, as it is impossible to leave that state. Therefore, the corresponding row in the transition matrix will have a single 1 in the column corresponding to the absorbing state and 0 in all other columns.

However, the probabilities in other rows of the transition matrix, corresponding to non-absorbing states, can still be non-zero. These non-zero probabilities represent the possibility of transitioning from a non-absorbing state to other non-absorbing or absorbing states.

In a Markov chain with absorbing states, the transition matrix generally has a specific structure called a canonical form. In this form, the matrix is partitioned into submatrices. The submatrix corresponding to the absorbing states will have the identity matrix since the probability of transitioning from an absorbing state to itself is 1.

The remaining submatrix corresponds to the non-absorbing states and may have non-zero probabilities. These probabilities represent the chance of transitioning between non-absorbing states or from non-absorbing states to absorbing states.

In summary, when absorbing states are present in a Markov chain, the rows of the transition matrix corresponding to absorbing states will indeed have a single 1 and all other entries will be 0. However, the probabilities in the rows corresponding to non-absorbing states can still have non-zero values, representing the possibility of transitioning between non-absorbing states or to absorbing states.

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To find the correct graph that represents the linear relationship between the number of roses blooming and the number of days that pass, we need to determine the slope-intercept form of the equation of the line.

Let x be the number of days that pass and y be the number of roses blooming. We can use the two given points to find the slope:

slope = (y2 - y1)/(x2 - x1) = (18 - 30)/(6 - 2) = -3

The slope of the line is -3. To find the y-intercept, we can use one of the points and substitute the slope and x-value:

y = mx + b

30 = (-3)(2) + b

b = 36

The y-intercept of the line is 36. Therefore, the equation of the line is:

y = -3x + 36

Now we can look at the given graphs and choose the one that fits the equation. We can see that the correct graph is:

a coordinate plane with the x-axis labeled time in days and the y-axis labeled number of roses blooming, with a line segment that passes through the points 0 comma 36 and 8 comma 12.

This is because the line segment passes through the two points (0, 36) and (8, 12), which corresponds to the y-intercept and another point on the line.

The correct statement based on the conclusion that the effect of social media use on anxiety depends on gender is c. The research study uncovered an interaction between social media use and gender, but no main effects.

This means that the effect of social media use on anxiety is different for males and females, and that the relationship between social media use and anxiety is not consistent across genders. There may be other factors that influence anxiety levels in addition to social media use and gender.

It is important to note that an interaction effect does not imply that there are no main effects, but rather that the main effects are not the same across groups. Therefore, there may be main effects of social media use and gender separately, but the interaction effect suggests that their combined influence on anxiety is more complex.

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The probability that Austin rolls a 2 or a 7, P is 1/6

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

Rolling a 12-sided number cube

The sample space of a 12-sided number cube is

S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}

From the above, we have

Outcomes of a 2 or 7 = 2

Sample size = 12

Using the above as a guide, we have the following:

The probability that Austin rolls a 2 or a 7, P = 2/12

Simplify

The probability that Austin rolls a 2 or a 7, P = 1/6

Hence, the probability that Austin rolls a 2 or a 7, P is 1/6

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the margin of error for this 95% confidence interval is 4.1%. This means that if we were to repeat the sampling process many times, 95%

The margin of error for a 95% confidence interval can be calculated using the formula:

Margin of error = (Upper limit - Lower limit) / 2

Substituting the given limits, we get:

Margin of error = (70.3% - 62.1%) / 2

Margin of error = 4.1%

Therefore, the margin of error for this 95% confidence interval is 4.1%. This means that if we were to repeat the sampling process many times, 95% of the intervals obtained would contain the true population proportion, within plus or minus 4.1% of the sample proportion.    

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The correlation between the two numbers written down cannot be determined with the given information. The answer is F.

Let's assume the sum of all the minute hands on the clocks at the first observation is X, and the sum at the second observation is Y. Since there are 12 clocks, each with a minute hand, the sum of all the minute hands on the clocks is 720 (12 x 60). Therefore, we have:

X + Y = 720×2 = 1440

Now, we know that 4 of the minute hands changed between the two observations. This means that the difference between the two sums is equal to the sum of the minute hand lengths of the 4 changed clocks. Since there are 60 minutes on a clock face, each minute hand is 1/60 of the circumference of the clock face. Therefore, the sum of the minute hand lengths of the 4 changed clocks is:

4 x (1/60) x circumference of a clock face = 4/60 x circumference of a clock face

Since the circumference of a clock face is constant for all the clocks, this sum is also constant. Let's call it K. Therefore, we have:

Y - X = K

Combining this with the previous equation, we get:

Y = 1440 - X

Y - X = K

Substituting the first equation into the second equation, we get:

1440 - Y = K

Therefore, the difference between the two numbers is constant and equal to K. However, we don't know what K is, so we cannot determine the correlation between the two numbers. Therefore, the answer is F.

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The limit as x approaches 0 of ((√x + 81) − 9)/x is approximately 810.00

To do this, we can plug in values of x that are close to 0 and see what happens to the expression.
Let's start by plugging in x = 0.1:
((√0.1) + 81) − 9)/0.1 = 820.96
Next, let's try x = 0.01:
((√(0.01) + 81) − 9)/0.01 = 809.96
As we can see, the expression seems to be getting closer and closer to a certain value as x gets closer to 0.
To confirm our result graphically, we can use a graphing calculator or online graphing tool to graph the function (√x + 81) − 9)/x and see what happens as x approaches 0.
After plotting the graph, we can see that the function does indeed approach a certain value as x gets closer and closer to 0.

Therefore, the summary is that the limit as x approaches 0 of ((√x + 81) − 9)/x is approximately 810.00 (rounded to two decimal places).

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The results of the vector operations are u · v = 6, v · v = 25, u^2 = (9, 4), (u · v)v = (24, -18), u · (5v) = 30

Let's calculate the given vector operations using the provided vectors u = (3, 2) and v = (4, -3):

u · v (dot product of u and v):

The dot product of two vectors is calculated by multiplying the corresponding components and summing them.

u · v = (3 * 4) + (2 * -3) = 12 - 6 = 6.

v · v (dot product of v with itself):

The dot product of a vector with itself gives the square of its magnitude.

v · v = (4 * 4) + (-3 * -3) = 16 + 9 = 25.

u^2 (square of u):

To square a vector, we square each component.

u^2 = (3^2, 2^2) = (9, 4).

(u · v)v (scalar projection of u onto v):

To find the scalar projection of u onto v, we first calculate the dot product of u and v, and then multiply the result by v.

(u · v)v = 6 * (4, -3) = (24, -18).

u · (5v) (vector projection of 5v onto u):

To find the vector projection of 5v onto u, we multiply 5v by the scalar projection of 5v onto u.

u · (5v) = (3, 2) · (5 * 4, 5 * -3) = (3, 2) · (20, -15) = (3 * 20) + (2 * -15) = 60 - 30 = 30.

Therefore, the results of the vector operations are as follows:

u · v = 6

v · v = 25

u^2 = (9, 4)

(u · v)v = (24, -18)

u · (5v) = 30

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To determine the exact sample size, we need to specify the desired margin of error (E).

To determine the required sample size to estimate the mean age of female statistics students, we need to use the formula for sample size calculation:

n = (Z x σ / E)²,

where n is the sample size, Z is the desired confidence level (in terms of standard deviations), σ is the standard deviation of the population, and E is the desired margin of error.

In this case, we want to estimate the mean age of female statistics students, assuming that their ages have a standard deviation of 17.1 years. However, we are given that the sample standard deviation for the calculation is 17.1 years. This implies that we already have an estimate of the standard deviation from a previous sample.

Since we don't have the specific value for the desired margin of error (E), we cannot determine the exact sample size. The margin of error depends on the level of confidence we want for our estimate. A common level of confidence is 95% or 1.96 standard deviations.

If we assume a 95% confidence level (Z = 1.96), we can calculate the sample size as follows:

n = (1.96 x 17.1 / E)².

To determine the exact sample size, we need to specify the desired margin of error (E).

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The inverse of the linear function f(x) = 6x + 12 is:

f⁻¹(x) = (x - 12)/6

Here we have the linear function:

f(x) = 6x + 12

We want to find the inverse function, this will be a function f⁻¹(x), such that when we evaluate the function in the inverse, we should get the identity, then we will get:

f(f⁻¹(x)) = x

Then we will get:

6*f⁻¹(x) + 12 = x

Solving for the inverse we will get:

6*f⁻¹(x) = x - 12

f⁻¹(x) = (x - 12)/6

That is the inverse function.

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Answer:

1. Two polygons can be formed using the set of points (0,1) and (2,3). One polygon is a line segment connecting these two points, and the other polygon is a right triangle with legs of length 1 and 2, and hypotenuse of length √5.

2. A triangle can be formed using the set of points (4,5), (6,7), and (8,9).

3. One polygon can be formed using the set of points (3,5) and the x-axis. This polygon is a right triangle with legs of length 3 and 5, and hypotenuse of length √34, where the point (3,5) is the vertex opposite the hypotenuse.

The number of polygons that can be formed are,

(0, 1) and (2, 3): Zero polygon

(4, 5), (6, 7), and (8, 9): One polygon (triangle)

(3, 5) and the x-axis: One polygon (triangle)

Determine the number of polygons :-

1) Points (0, 1) and (2, 3) -

The set of points (0, 1) and (2, 3) cannot form a polygon as they are collinear (i.e., lie on the same straight line) and do not enclose an area.

2) Points (4, 5), (6, 7), and (8, 9) -

These are three different points.

Because a triangle has three sides, one triangle can be formed by the set of points (4,5), (6,7), and (8,9). i.e. only one polygon.

3) Points (3, 5) and the x-axis -

One polygon can be formed by the set of points (3,5) and the x-axis: a triangle with vertices at (3,5), (0,0), and (6,0).

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Using mathematical operations, the quantity of YumYum cupcakes required by my siblings and 1, with each wanting 7 halves of it, is 14 cupcakes.

The total quantity of cupcakes required by the 4 siblings can be determined using the mathematical operations of division and multiplication.

Division operation consists of the dividend, the divisor, and the quotient while multiplication involves the multiplier, the multiplicand, and the product.

The number of siblings = 4

The quantity of YumYum cupcakes required by each = 7 halves

7 halves = 3.5 (7 ÷ 2)

Thus, since each sibling requires 3.5 cupcakes, using mathematical operations, the total quantity = 14 cupcakes (3.5 x 4)

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What is the total quantity of YumYum cupcakes required?

The rate of change in the function y = x-6 is less than the rate of change of the function represented in the table.

In Mathematics and Geometry, the rate of change (slope) of any straight line can be determined by using this mathematical equation;

Rate of change = (Change in y-axis, Δy)/(Change in x-axis, Δx)

Rate of change = rise/run

Rate of change = (y₂ - y₁)/(x₂ - x₁)

For the function represented by the table, the rate of change can be calculated as follows:

Rate of change = (1 + 5)/(2 - 0)

Rate of change = 6/2

Rate of change = 3.

For the function represented by y = x - 6, we can logically deduce that its rate of change is equal to 1.

In conclusion, the rate of change of the function represented by the table is greater because 3 is greater than 1.

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Answer:

(-4,-3)=-4-3=-7 (-4,-6)=-10,,(-1-6)=-7(-1-3)=4

The median number of faculty in departments in the college of arts and science is 12.

The median is a measure of central tendency that represents the middle value of a dataset when the values are sorted in ascending or descending order. Its purpose is to give a single representative value for the dataset, offering a way to understand the center of the data distribution. Unlike the mean, which can be affected by extreme values, the median is resistant to outliers and gives us a better understanding of what a typical value in the data set might be.

To find the median number of faculty in the College of Arts and Science at Delta University, first, arrange the department faculty numbers in ascending order:

7, 8, 9, 11, 12, 13, 14, 15, 17.

Since there are nine departments, which is an odd number, the median will be the middle value in the sorted list. So the middle number is the fifth number, which is 12

The median number of faculty in departments in the College of Arts and Science at Delta University is 12, as it is the middle value in the sorted list.

Note: The question is incomplete. The complete question probably is: The college of arts and science at delta university has nine departments. The number of faculty in each department is shown below. What is the median number of faculty in departments in the college of arts and science? 8, 12, 9, 15, 17, 11, 13, 14, 7.

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According to the question we have The angle at which the athlete should throw the javelin so that it travels 115 feet is 2.136°.

The range of a projectile fired at an angle with the horizontal and with an initial velocity of v₀ feet per second is given by r = 32v₀² sin(θ) where r is the horizontal distance the projectile travels.

An athlete throws a javelin at 75 feet per second.  

We need to calculate the angle of projection θ from the given data.

For this, we can use the formula of the range of a projectile. r = 32v₀² sin(θ) .

Now, put the values of r and v₀, given as 115 and 75 respectively.

115 = 32(75)² sin(θ)sin(θ) = 115 / (32 × 75²)sin(θ) = 0.03713θ = sin⁻¹ (0.03713)θ = 2.136° .

The angle at which the athlete should throw the javelin so that it travels 115 feet is 2.136°.

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Equation 6: x = (11y + 3z - 303) / 16

Equation 9: 811y + 387z = 2,745

What is Elimination?

The method of elimination is where you actually eliminate one of the variables by adding two equations. In this way, you remove one variable in order to solve for the other variable. In a system of two equations, since you have two variables, eliminating one greatly simplifies the process of solving for the other.

To solve the system of equations using elimination, we'll eliminate one variable at a time until we find the values of x, y, and z.

Multiply the second equation by 2 and the third equation by -3 to make the coefficients of z the same in both equations:

Equation 2: 2x - 12y - 12z = 6

Equation 3: 12x - 9y - 6z = -42

Add the first equation to the modified second equation and the modified third equation:

Equation 1 + Equation 2: -6x - 5y - 3z + 2x - 12y - 12z = 393 + 6

=> -4x - 17y - 15z = 399 (Call this Equation 4)

Equation 1 + Equation 3: -6x - 5y - 3z + 12x - 9y - 6z = 393 - 42

=> 6x - 14y - 9z = 351 (Call this Equation 5)

Multiply Equation 5 by 2 and subtract Equation 4 from it:

2 * Equation 5 - Equation 4: 12x - 28y - 18z - (-4x - 17y - 15z) = 702 - 399

=> 16x - 11y - 3z = 303 (Call this Equation 6)

Multiply Equation 4 by 16 and add it to Equation 6:

16 * Equation 4 + Equation 6: -64x - 272y - 240z + 16x - 11y - 3z = 16 * 399 + 303

=> -48x - 283y - 243z = 6,399 (Call this Equation 7)

Divide Equation 7 by -1 to simplify the coefficients:

Equation 7: 48x + 283y + 243z = -6,399

Now we have the following system of equations:

Equation 6: 16x - 11y - 3z = 303

Equation 7: 48x + 283y + 243z = -6,399

We can solve this system using further elimination or substitution. Let's solve it using substitution.

From Equation 6, solve for x:

16x = 11y + 3z - 303

x = (11y + 3z - 303) / 16

Substitute this value of x into Equation 7:

48[(11y + 3z - 303) / 16] + 283y + 243z = -6,399

Simplify the equation:

528y + 144z - 9,144 + 283y + 243z = -6,399

Combine like terms:

811y + 387z = 2,745 (Call this Equation 8)

Now we have the following system of equations:

Equation 6: x = (11y + 3z - 303) / 16

Equation 8: 811y + 387z = 2,745

We can solve this system by further substitution or using a numerical method. Let's solve it using substitution.

From Equation 6, solve for x:

x = (11y + 3z - 303) / 16

Substitute this value of x into Equation 8:

811y + 387z = 2,745

Simplify the equation:

811y + 387z = 2,745 (Call this Equation 9)

Now we have the following system of equations:

Equation 6: x = (11y + 3z - 303) / 16

Equation 9: 811y + 387z = 2,745

We can solve this system by further substitution or using a numerical method. Let's solve it using a numerical method such as Gaussian elimination or matrix inversion.

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