i really need some help on this question

Answer:

15 inches

Step-by-step explanation:

Here, we have a scale of 5 inches to 3 miles

We have 9 miles here, we now want to get the amount of corresponding inches

Let the corresponding inches be x

5 inches to 3 miles

x inches to 9 miles

That means ;

x * 3 = 5.* 9

x = 45/3

x = 15 inches

Answer: y=37.5degrees and x=110degrees

Step-by-step explanation: sum of angle in a quadrilateral =360 and opposite angles=180. 115+2y=180,2y=180-115=75. 2y/2=75/2. therefore y=37.5. while x=70+x=180,x=180-70=110. x=110

The scalar projection is 42/13, and the vector projection is 42/169⟨-5,12⟩.

The scalar projection of b onto a can be calculated using the formula \(\frac{a.b}{|a|}\), and the vector projection of b onto a can be calculated using the formula \(\frac{a.b}{|a|^{2} } .a\). The formula for finding the magnitude of a is |a| = √c²+d² if a = ⟨c,d⟩.

a = ⟨−5, 12⟩, b = ⟨4, 6⟩

a⋅b = ⟨−5, 12⟩⟨4, 6⟩

= -20 + 72

= 42

|a| = √[(-5)² + (12)²]

= √25 + 144

= √169

= 13

The scalar projection is

\(\frac{a.b}{|a|}\) = [⟨−5, 12⟩⟨4, 6⟩]/√[(-5)² + (12)²]

= [-20 + 72]/√25 + 144

= 42/√169

= 42/13

The vector projection is

\(\frac{a.b}{|a|^{2} } .a\) = [42/(13)²] ⟨−5, 12⟩

= 42/169⟨−5, 12⟩

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Answer:

Commutative Property of Addition

Step-by-step explanation:

When you double the size of the problem, the runtime of the algorithm increases by a constant factor. Specifically, it increases by a factor of log(2) = 1. Since the algorithm's time complexity is logarithmic, it means that the runtime increases slowly as the problem size grows.

To understand this, let's consider an example. Suppose you have an algorithm that can find an element in a sorted list of n elements in O(log n) time. If the list contains 100 elements, the algorithm will take at most log(100) = 2 steps to find the element. If you double the size of the list to 200 elements, the algorithm will take at most log(200) = 2.3 steps to find the element. This is only a small increase in runtime, and the algorithm is still very efficient. This property of logarithmic time complexity makes algorithms that use it very valuable in many fields, especially in large-scale data processing and search applications, where the data size can be very large. Because of their efficiency, these algorithms can handle very large datasets in a reasonable amount of time, making them highly sought after in many industries. Since the algorithm's time complexity is logarithmic, it means that the runtime increases slowly as the problem size grows.

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Total revenue is calculated by multiplying the price per unit by the quantity produced and sold. This calculation provides valuable insights into a firm's sales performance and helps in assessing the financial health of the business.

A firm's total revenue is calculated by multiplying the quantity produced by the price at which each unit is sold. To calculate the total revenue, you can use the following equation:

Total Revenue = Price × Quantity Produced

where Price represents the price per unit and Quantity Produced represents the total number of units produced and sold.

For example, let's say a company sells a product at a price of $10 per unit and produces 100 units. The total revenue can be calculated as:

Total Revenue = $10 × 100 units

Total Revenue = $1,000

So, the firm's total revenue in this case would be $1,000.

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Total revenue is an important metric for businesses as it indicates the overall sales generated from the production and sale of goods or services. By calculating the total revenue, companies can evaluate the effectiveness of their pricing strategies and determine the impact of changes in quantity produced or price per unit on their overall revenue.

It is essential for businesses to monitor and analyze their total revenue to make informed decisions about production levels, pricing, and sales strategies.

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Yes, its true that the questionnaire is very carefully constructed by an individual to provide the measurement instrument.  

A questionnaire is a studies device which includes a sequence of questions for the motive of amassing facts from respondents. Questionnaires may be concept of as a form of written interview. A questionnaire is a listing of questions or gadgets used to collect facts from respondents approximately their attitudes, experiences, or opinions.

Questionnaires may be used to acquire quantitative and/or qualitative facts. Questionnaires are generally utilized in marketplace studies in addition to withinside the social and fitness sciences. Questionnaires are typically taken into consideration to be excessive in reliability. This is due to the fact it's miles feasible to invite a uniform set of questions. Any troubles withinside the layout of the survey may be ironed out after a pilot study. The greater closed questions used, the greater dependable the studies.

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314

Yes Yes Pog Pog Pog Pog Pog Pog

it displays the computed sum and product of the diagonal elements.

Here's a MATLAB code to find the sum and product of the diagonal elements of a given matrix `A`, as well as an example execution for `A = ones(5)`:

```matlab

% Define the matrix A

A = ones(5);

% Get the size of the matrix

[n, ~] = size(A);

% Initialize variables for sum and product

diagonal_sum = 0;

diagonal_product = 1;

% Calculate the sum and product of diagonal elements

for i = 1:n

   diagonal_sum = diagonal_sum + A(i, i);

   diagonal_product = diagonal_product * A(i, i);

end

% Display the results

disp("Sum of diagonal elements: " + diagonal_sum);

disp("Product of diagonal elements: " + diagonal_product);

```

Example execution for `A = ones(5)`:

```

Sum of diagonal elements: 5

Product of diagonal elements: 1

```

In this example, `A = ones(5)` creates a 5x5 matrix filled with ones. The code then iterates over the diagonal elements (i.e., elements where the row index equals the column index) and accumulates the sum and product. Finally, it displays the computed sum and product of the diagonal elements.

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Answer:

The correct option is the second option.

How to make a Box-and-whisker plot:

Solution explanation:

if you apply the rules of the boxplot above with both choices, the second lines up perfectly.

Answer:

\( Area = 112.1 m^2 \)

Step-by-step Explanation:

Given:

∆WXY

m < X = 130°

WY = x = 31 mm

m < Y = 26°

Required:

Area of ∆WXY

Solution:

Find the length of XY using Law of Sines

\( \frac{w}{sin(W)} = \frac{x}{sin(X)} \)

X = 130°

x = WY = 31 mm

W = 180 - (130 + 26) = 24°

w = XY = ?

\( \frac{w}{sin(24)} = \frac{31}{sin(130)} \)

Multiply both sides by sin(24) to solve for x

\( \frac{w}{sin(24)}*sin(24) = \frac{31}{sin(130)}*sin(24) \)

\( w = \frac{31*sin(24)}{sin(130)} \)

\( w = 16.5 mm \) (approximated)

\( XY = w = 16.5 mm \)

Find the area of ∆WXY

\( area = \frac{1}{2}*w*x*sin(Y) \)

\( = \frac{1}{2}*16.5*31*sin(26) \)

\( = \frac{16.5*31*sin(26)}{2} \)

\( Area = 112.1 m^2 \) (to nearest tenth).

Answer: 10+12x=58

Step-by-step explanation:

The equation would be 10+12x=58, where x is the amount of additional hours babysitting besides the first hour.

To solve: move terms to one side (subtract 10) so you'd get 12x=48

The answer to this equation would be x=4 (you divide by 12)

To check if correct: plug in 4, to get 10+12(4)=58 which is 10+48=58 which gets 58=58

So the time worked was a total of 5 hours since you have to add on the first hour, but the solution to your equation represents just the amount of additional hours worked besides the first hour.

The maximum value of Δz for the flow to remain laminar and the pressure to remain constant, we can use the Hagen-Poiseuille equation and the pressure gradient equation for a vertical pipe.

Given:

Diameter of the pipe (D) = 2.28 in.

Horizontal distance (L) = 1 mile

= 5280 ft

We need to find the maximum value of Δz.

The Hagen-Poiseuille equation for laminar flow through a circular pipe is:

Q = (π * D^4 * ΔP) / (128 * μ * L),

where Q is the volumetric flow rate, ΔP is the pressure drop along the pipe, μ is the dynamic viscosity of the fluid, and L is the length of the pipe.

Since the pressure is constant along the pipe, ΔP = 0, and the equation simplifies to:

Q = (π * D^4 * 0) / (128 * μ * L),

Q = 0.

For laminar flow, the flow rate (Q) must be non-zero, so we can conclude that the flow must stop.

In other words, for the flow to remain laminar and the pressure to remain constant, the change in elevation (Δz) should not exceed the point where the flow stops. Therefore, there is no maximum value of Δz that satisfies the given conditions.

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Answer:

3/8

Step-by-step explanation:

There are 4 black sections, 3 gray sections, and 1 white section.

This means that there are 8 in total.

3/8 of the squares are gray so that would be the answer.

Answer:

2x+3y+5=0

a = 2  b = 3  c=5

Step-by-step explanation:

We are asked to express 2x+3y=-5 in the form ax+by+c=0

Add 5 to both sides

2x+3y+5=0

We can now find the values of a, b and c now that the equation is in standard form.

Answer:

64

Step-by-step explanation:

40/8 = 8

8*8

Answer:

$64

Step-by-step explanation:

form a ratio:

5:40

simplify:

1:8

so now desimplify

8:64

Answer:

y=-2x+5

Step-by-step explanation:

Answer:

y=-2x+5

Step-by-step explanation:

First, subtract 4x from both sides. You will get 2y=-4x+10. Then divide both sides by 2 to isolate the y. You will get y=-2x+5.

Answer:

Five: 40

Six 8000 - (-50)

Step-by-step explanation:

Five

22 - (-18)

22 + 18

40

Six

She has to look down below sea level. Getting to sea level is 8000 feet. That usually is taken to be the positive direction.

It's the 50 feet that's the problem. The whale isn't floating above her. It is 50 feet below sea level. Worse yet, it is a negative number. Though it goes entirely, against your intuition, it has to be written as

8000 - (-50)

8000 + 50

8050

Answer:

A

Step-by-step explanation:

The measure of the pre-image, line segment GH according to the task content is; 14.

According to the task content as described;

It follows that the pre-image in discuss is segment GH and the image is line segment; G'H'.

On this note, since it follows that the image is as a result of the dilation of the pre-image by a scale factor of 4, we can conclude that the image is 4 times greater than the pre-image.

Hence, the measure of line segment; GH according to the task content is; 56/4 = 14.

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At each iteration of a 10-fold cross-validation with a data set of 80 observations, 72 observations are used for training.

In a k-fold cross-validation, the data set is divided into k subsets or folds. Each fold is used as a validation set, and the remaining folds are used for training. The process is repeated k times, with each fold serving as the validation set once.

Given:

Number of observations in the data set = 80

Number of folds in cross-validation (k) = 10

To determine the number of observations used for training at each iteration, we need to calculate the size of each fold.

Number of observations in each fold = Total number of observations / Number of folds

Number of observations in each fold = 80 / 10

Number of observations in each fold = 8

Therefore, at each iteration of the 10-fold cross-validation, 8 observations are used for training.

However, we want to know the total number of observations used for training, so we need to multiply the number of observations in each fold by the number of folds minus one.

Total number of observations used for training = Number of observations in each fold * (Number of folds - 1)

Total number of observations used for training = 8 * (10 - 1)

Total number of observations used for training = 8 * 9

Total number of observations used for training = 72

In a 10-fold cross-validation with a data set of 80 observations, 72 observations are used for training at each iteration.

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Answer:

C

Step-by-step explanation:

Got it right

Answer: the answer to this is true

Answer:

I'm guessing you mean fraction decimal and percentage

The final answer is:

3/4

0.75

75%

Step-by-step explanation:

You have to add 400 + 250 + 100 and then you will get 750. Then you make 750 into a fraction, decimal, and percentage

Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!

The probability that the student will pick a ball that is either red, orange, or green is 0.75

The probability that an event will occur is measured by the ratio of favorable examples to the total number of situations possible

Probability = number of desirable outcomes / total number of possible outcomes

The value of probability lies between 0 and 1

Given data ,

Let the probability that the student will pick a ball that is either red, orange, or green be P

Now , the total number of balls in the container = 1000 balls

And , probability that the student will pick a ball that is either red, orange, or green can be calculated as the sum of the probabilities of picking a red ball, an orange ball, or a green ball. That is,

P(Red or Orange or Green) = P(Red) + P(Orange) + P(Green)

The probability of picking a red ball is 400/1000 = 0.4

The probability of picking an orange ball is 250/1000 = 0.25

And the probability of picking a green ball is 100/1000 = 0.1.

Therefore , P (Red or Orange or Green) = 0.4 + 0.25 + 0.1 = 0.75

Hence , the probability is 0.75

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The probability of the sample proportion being between 0.25 and 0.4 is approximately 0.2496

To calculate the probability that the sample proportion is between 0.25 and 0.4, we can use the sampling distribution of the sample proportion. Given that the manager believes 44% of orders come from first-time customers, we can assume this to be the true population proportion.

The sampling distribution of the sample proportion follows a normal distribution when the sample size is large enough. We can use the formula for the standard deviation of the sample proportion, which is sqrt((p*(1-p))/n), where p is the population proportion and n is the sample size.

In this case, p = 0.44 (proportion of first-time customers according to the manager) and n = 137 (sample size).

Using the standard deviation formula, we get sqrt((0.44*(1-0.44))/137) ≈ 0.0455.

Next, we can standardize the values 0.25 and 0.4 using the formula z = (x - p) / sqrt((p*(1-p))/n), where x is the sample proportion.

For 0.25:

z1 = (0.25 - 0.44) / 0.0455 ≈ -4.1758

For 0.4:

z2 = (0.4 - 0.44) / 0.0455 ≈ -0.8791

Now, we can find the probability that the sample proportion is between 0.25 and 0.4 by calculating the area under the normal curve between the corresponding z-scores.

Using a standard normal distribution table or a calculator, we can find the probabilities associated with the z-scores. The probability of the sample proportion being between 0.25 and 0.4 is approximately 0.2496.


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if you could show us the picture then maybe i can help you

Answer: The probability that of two students randomly chosen, at least one prefers lifting weights is 0.3949.

Explanation :Let A be the event that the first student prefers lifting weights and B be the event that the second student prefers lifting weights. We need to find P(A ∪ B).P(A) = probability that the first student prefers lifting weights = 0.21P(B) = probability that the second student prefers lifting weights = 0.21P(A ∩ B) = probability that both students prefer lifting weights P(A ∪ B) = P(A) + P(B) - P(A ∩ B)We have :P(A ∩ B) = P(A) × P(B) = 0.21 × 0.21 = 0.0441P(A ∪ B) = 0.21 + 0.21 - 0.0441 = 0.3659The probability that neither student prefers lifting weights is 1 - P(A ∪ B) = 1 - 0.3659 = 0.6341So, the probability that of two students randomly chosen, at least one prefers lifting weights is 0.3949.

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Answer:

5

Step-by-step explanation:

To calculate a 95% confidence interval for the mean weight of all Utah County Fair pigs, we use the formula:

Confidence Interval = Sample Mean ± Margin of Error

Given:

Sample Mean (x) = 195

Standard Deviation (σ) = 18

Sample Size (n) = 100

The margin of error can be calculated using the formula:

Margin of Error = (Z * σ) / √n

For a 95% confidence level, the Z-value for a two-tailed test is approximately 1.96.

Margin of Error = (1.96 * 18) / √100

= 3.528

Therefore, the confidence interval is:

(195 - 3.528, 195 + 3.528)

(191.472, 198.528)

The correct answer is (191, 199).

Question 4: If the sample size is increased from 100 to 200, the margin of error will decrease in size. The margin of error is inversely proportional to the square root of the sample size. As the sample size increases, the margin of error becomes smaller, resulting in a more precise estimate.

Question 5: To find out how many pigs must be sampled to have 90% confidence in the results with a margin of error of 6.8, we can use the formula:

Sample Size (n) = (Z^2 * σ^2) / E^2

Given:

Confidence Level (1 - α) = 90% (or 0.9)

Margin of Error (E) = 6.8

Standard Deviation (σ) = 18

For a 90% confidence level, the Z-value for a two-tailed test is approximately 1.645.

Sample Size (n) = (1.645^2 * 18^2) / 6.8^2

= 3.379

Therefore, the minimum number of pigs that must be sampled is approximately 4 (rounded up to the nearest whole number).

The correct answer is 5.