Olivia wants to know the proportion of students at her school who use a

certain social media app. She interviews a random sample of students at

her school. She finds that 30% of the students in the sample use the app.

What conclusion can she draw from the sample?

А

It is likely that about 30% of the students at her school use the app.

B Exactly 30% of the students at her school use the app.

Every random sample would find that 30% of the students use

the app

It is likely that 30% of the students at her school were selected for

the sample.

Therefore, Bruce considered his full speed to be 20 mph if Maria's speed was 16 mph.

If Bruce and Maria both headed north at full speed and after 4 hours Bruce was 16 miles ahead of Maria, we can calculate Bruce's speed.

Bruce's speed can be represented by the variable "B," and Maria's speed is given as 16 mph. Since distance equals speed multiplied by time, we can set up the following equation:

Distance traveled by Bruce = Distance traveled by Maria + 16 miles

B * 4 = 16 * 4 + 16

4B = 64 + 16

4B = 80

Dividing both sides of the equation by 4:

B = 20

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Answer: n = -2

Step-by-step explanation:

3n +2(n + 2) = 9n + 12

(simplify 2(n + 2)) =

3n + 2n + 4 = 9n + 12

(subtract 9n from both sides)

3n + 2n - 9n + 4 = 12

-4n + 4 = 12

(subtract 4 from both sides)

-4n = 8

(divide -4 from both sides)

n = -2

In ridge regression, the penalty strength parameter, represented by \lambda», controls the trade-off between fitting the training data well and keeping the model coefficients small.

When a very large penalty strength is chosen, it results in a higher degree of shrinkage of the regression coefficients towards zero. This means that the model becomes less complex and less likely to overfit the training data. However, it also means that the model may become too biased towards the null hypothesis, leading to underfitting and decreased predictive power. Therefore, choosing the right value of \lambdaλ is crucial for achieving optimal performance in ridge regression.
In ridge regression, choosing a very large λ (lambda) penalty strength results in a higher regularization effect, which helps to reduce overfitting by shrinking the coefficients of the independent variables towards zero. This helps to create a more generalized model by controlling the complexity of the model. However, choosing a λ value that is too large can also result in underfitting, as the model may become too simple to capture the underlying relationships in the data effectively.

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Answer:

3(2p²v¹²)

−(2p⁸v−15m+4)

Step-by-step explanation:

Cant some of the special chars wont show theres no point

Contact me:

Need help? add me on discord reseller#0001

Also feed back is a good thing so let me know how I did

If I helped please give a brainliest!

Answer:

Greatest- 2 × 4/9

Then- 1  2/3 × 4/9

Then- 7/7 × 4/9

Lest- 3/4 × 4/9

Step-by-step explanation:

The right hand fraction you are timing by is the same whilst on the left they grow so you order them and dont focus on the times aspect of the question

9514 1404 393

Answer:

  (b)  27

Step-by-step explanation:

It appears as though we're to assume that KM is a diameter, through circle center point N. That makes triangle KLM a right triangle, so angle K is the complement of angle M.

  ∠K = 180° -63° = 27°

If each T-shirt costs Rs. 120 and Temoso receives a 15% commission, he needs to sell 20 of them in order to make Rs. 360.

Let's first find out how much commission Temoso earns on each T-shirt he sells. The cost of each T-shirt is Rs. 120, and Temoso earns a 15% commission on each T-shirt. This means that he earns 0.15 × 120 = Rs. 18 on each T-shirt he sells.

Now, let's find out how many T-shirts Temoso must sell to earn Rs. 360.

We can set up the following equation:

18x = 360

where x is the number of T-shirts that Temoso needs to sell.

Dividing both sides by 18, we get:

x = 20

Therefore, Temoso needs to sell 20 T-shirts to earn Rs. 360, assuming the cost of each T-shirt is Rs. 120 and he earns a 15% commission on each T-shirt he sells.

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(a) Option A, if its value is a large positive number, statistic A x2 provides strong evidence for the alternative hypothesis.

(b) Option B, the null hypothesis that gender is not related to personal goals and the alternative hypothesis that gender is related to personal goals.

(c) Option B, the variables considered in the chi-square test for the evaluation of contingency table B are categorical variables.

(a) If the x2 statistic is a large positive number, it provides strong evidence for the alternative hypothesis. The x2 statistic is used in hypothesis testing to determine if there is a significant difference between observed and expected frequencies. Large positive values ​​indicate that the observed frequency is significantly different from the expected frequency, supporting the alternative hypothesis.

(b) The hypotheses tested in the chi-square test for the contingency table are the null hypothesis that gender is not related to personal goals and the alternative hypothesis that gender is related to personal goals. personal goals. This test determines whether there is a significant relationship between two categorical variables.

(c) The variables considered in the chi-square test used to evaluate the contingency table are categorical variables. These variables cannot be assumed to be mean or normally distributed. The chi-square test is used to analyze the relationship between two or more categorical variables, where each variable has a discrete set of categories.

Complete Question:

For each problem, select the best response (a) A x2 statistic provides strong evidence in favor of the alternative hypothesis if its value is A. a large positive number. OB. exactly 1.96 c. a large negative number. D. close to o E. close to 1. (b) A study was performed to examine the personal goals of children in elementary school. A random sample of students was selected and the sample was given a questionnaire regarding achieving personal goals. They were asked what they would most like to do at school: make good grades, be good at sports, or be popular. Each student's sex (boy or girl) was also recorded. If a contingency table for the data is evaluated with a chi-squared test, what are the hypotheses being tested? A. The null hypothesis that boys are more likely than girls to desire good grades vs. the alternative that girls are more likely than boys to desire good grades. OB. The null hypothesis that sex and personal goals are not related vs. the alternative hypothesis that sex and personal goals are related. C. The null hypothesis that there is no relationship between personal goals and sex vs. the alternative hypothesis that there is a positive, linear relationship. OD. The null hypothesis that the mean personal goal is the same for boys and girls vs. the alternative hypothesis is that the means differ. O E. None of the above. (C) The variables considered in a chi-squared test used to evaluate a contingency table A. are normally distributed. B. are categorical. C. can be averaged. OD. have small standard deviations. E. have rounding errors.

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The inverse function (or reciprocal function) is \(f(x) = \dfrac{1}{x}\).

The x-values you can use are everything except for 0, since 1/0 is undefined.

If you look at the graph, you'll also notice that the graph never touches the x-axis, meaning a y-value of 0 is never used.  So the range is also all real numbers, except for 0.  

So the domain is \(\{ \ x \ | \ x\in\mathscr{R}, \ x\neq0 \ \}\) and

the range is \(\{ \ y \ | \ y\in\mathscr{R}, \ y\neq0 \ \}\).

Steve spent 2/3 of $15, to find how much this 2/3 of $15 is, we have to multiply $15 by 2/3, as follows:

Therefore, we have found that Steve already spent $10 .

Answer:

Step-by-step explanation:

Area of the rectangle length x width

7.5x5.3 =39.75 sq.m

so, B is the correct answer.

Answer:

19

Step-by-step explanation:

2x + x = 57

3x = 57

x = 19

Check:

2 times 19 = 38

38 + 19 = 57

Explanation:

The blue rectangle has area of 4a^2*6a^2 = 24a^4

The red rectangle has area 4a^2*9a = 36a^3

The green rectangle has area 4a^2*3 = 12a^2

The total area is 24a^4 + 36a^3 + 12a^2

After adding (-7) to each value in the given data set, the mean is 38.25, the median is 38, the mode does not exist, the range is 24, and the standard deviation is approximately 8.85.

To find the mean of the data set, add all the values together (49, 30, 34, 43, 31, 37, 25, 47) and divide the sum by the total number of values (8). The mean is the average value of the data set.

To determine the median, arrange the values in ascending order (25, 30, 31, 34, 37, 43, 47, 49) and find the middle value. In this case, the median is the average of the two middle values (34 and 37).

The mode refers to the value(s) that appear most frequently in the data set. In this case, there is no mode since no value appears more than once.

The range is calculated by subtracting the smallest value (25) from the largest value (49). Thus, the range is 24.

To calculate the standard deviation, subtract the mean from each value, square the differences, calculate the mean of those squared differences, and finally take the square root of the resulting value. This provides a measure of the dispersion or spread of the data around the mean.

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Answer: The x-intercept of the line below would be (1,0).  

Step-by-step explanation: The reason this would be the x-intercept is because the dot that is on the x-axis is on the number 1 and the number that this dot leads to on the y-axis is 0. Hope this helps!

The probability that Hannah's number is an even palindrome is 1/45.

There are 45 even palindrome numbers between 1000 and 9999, out of a total of 4500 possible 4-digit numbers.

So, the probability of Hannah writing an even palindrome number is 1/45.

A palindrome number is the same when read from left to right or right to left. There are 90 possible 2-digit palindrome numbers (11, 22, 33, etc.), and 9 possible 1-digit palindrome numbers (1, 2, 3, etc.), making a total of 99 palindrome numbers from 1 to 999. In a 4-digit number, the first and last digits must be the same for it to be a palindrome.

Therefore, the first digit has 9 choices (1-9), and the last digit also has 9 choices. The second digit can be any of the 10 digits (0-9), and the third digit can be any of the 5 remaining even digits (0, 2, 4, 6, 8).

Thus, there are 45 even palindrome numbers between 1000 and 9999.

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the exact formula for X(n) is given by the sum of i from 1 to 4n + 1. The closed-form formula for X(n) is (4n + 1)(4n + 2)/2, expressed as a polynomial function. The asymptotic value of X(n) is approximately 4n^2, representing the growth rate as n approaches infinity.

(i) The exact formula for X(n) can be determined by analyzing the procedure PrintXs(n) and counting the number of times the letter "X" is printed. In this case, the outer loop runs for 4n + 1 iterations, and for each iteration, the inner loop runs i times. Thus, the total number of "X" letters printed is given by the sum of i from 1 to 4n + 1.

(ii) To express X(n) as a closed-form polynomial function, we can simplify the sum mentioned above. By using the formula for the sum of an arithmetic series, the closed-form formula for X(n) can be written as X(n) = (4n + 1)(4n + 2)/2.

(iii) The asymptotic value of X(n) can be expressed using the e-notation, which represents an estimate of the growth rate. In this case, as n approaches infinity, the dominant term in the expression (4n + 1)(4n + 2)/2 is 4n^2. Therefore, we can express the asymptotic value of X(n) as X(n) ~ 4n^2.

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The spring constant k is 810,000 N/m.

To solve this problem, we need to use the equation for the force exerted by a spring, which is F = -kx, where F is the force, x is the displacement, and k is the spring constant. We also need to use the equation for the momentum of an object, which is p = mv, where p is the momentum, m is the mass, and v is the velocity.
When the rail car hits the bumper, it experiences a force from the spring, which causes it to decelerate. This deceleration is given by the equation a = F/m, where a is the acceleration. We can substitute F = -kx into this equation to get a = -kx/m. We can also use the equation \(v^2 = u^2 + 2as,\)where u is the initial velocity (which is 1.8 m/s), s is the displacement of the spring (which is 0.06 m), and a is the deceleration that we just found. Rearranging this equation, we get \(a = (v^2 - u^2)/(2s).\)
Equating these two expressions for a, we get \(-kx/m = (v^2 - u^2)/(2s).\)Solving for k, we get \(k = (mv^2)/(2xs).\) Substituting in the given values, we get\(k = (6000 kg * (1.8 m/s)^2)/(2 * 0.06 m)\) = 810,000 N/m.
Therefore, the spring constant k is 810,000 N/m.

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Out of a whole population, a sample is a small part which is considered for any survey.  

The population in this case would be all the one-bedroom apartments available for rent near the college.

The sample would be the listings that Greg is looking at in the local newspaper and on the internet site.

Sample: listings in a local newspaper and on an Internet site              

Population: all available apartments near the college          

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Answer:

y=3, x=15

Step-by-step explanation: hope this helps

The volume of the composite figure is 145.68 cubic meters

Composite figures are figures that is made up of more than one shape. The volume of the figure is expressed as:

Volume = volume of cylinder + volume of prism

Volume = πr²h + lwh

where

r is the radius of cylinder

h is the height

l, w and h are the length, width and height respectively

Substitute the dimensions

Volume = 3.14(2)² * 3 + (2.4*5*9)

Volume = 37.68 + 108

Volume = 145.68 cubic meters

Hence the volume of the composite figure is 145.68 cubic meters

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The solution to the given differential equation, x²y'' + xy' - y = ln(x), using variation of parameters is: y(x) = C₁x + C₂x ln(x) + x ln²(x)/2,

where C₁ and C₂ are constants.

To solve the differential equation using variation of parameters, we first find the solutions to the homogeneous equation x²y'' + xy' - y = 0. Let's denote these solutions as y₁(x) and y₂(x).

Next, we find the Wronskian W(x) = y₁(x)y₂'(x) - y₁'(x)y₂(x) and calculate the integrating factors u₁(x) = -∫(y₂(x)ln(x))/W(x) dx and u₂(x) = ∫(y₁(x)ln(x))/W(x) dx.

Using these integrating factors, we can determine the particular solution yₚ(x) = -y₁(x)∫(y₂(x)ln(x))/W(x) dx + y₂(x)∫(y₁(x)ln(x))/W(x) dx.

Finally, the general solution is given by y(x) = yₕ(x) + yₚ(x), where yₕ(x) is the general solution to the homogeneous equation.

Solving the homogeneous equation x²y'' + xy' - y = 0 gives the solutions y₁(x) = x and y₂(x) = x ln(x).

After calculating the Wronskian W(x) = x² ln(x), we obtain the integrating factors u₁(x) = -ln(x)/2 and u₂(x) = -x/2.

Plugging these values into the particular solution formula, we find yₚ(x) = C₁x + C₂x ln(x) + x ln²(x)/2.

Hence, the general solution is y(x) = C₁x + C₂x ln(x) + x ln²(x)/2, where C₁ and C₂ are arbitrary constants.

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Answer:

The domain is {x : -7 ≤ x ≤ 6} ⇒ [-7, 6]

The range is {y: -5 ≤ y ≤ 4} ⇒ [-5, 4]

Step-by-step explanation:

The domain is all values of x belong to the graph

The range is the values of y that corresponding to the domain

Let us study the graph to find the domain and the range

∵ The graph starts from the point (-7, 4) ⇒ the highest point

∵ The graph ends at the point (6, -5) ⇒ the lowest point

→ That means the most left point has x-coordinate -7 and the most

   right point has x-coordinate 6

∴ The domain is {x : -7 ≤ x ≤ 6} ⇒ [-7, 6]

∵ The highest point on the graph has y-coordinate 4

∵ The lowest point on the graph has a y-coordinate -5

→ The range is the values of y from these values

∴ The range is {y: -5 ≤ y ≤ 4} ⇒ [-5, 4]

Step-by-step explanation:

2.1. find the sum of the following

869345.03

+ 45.236

--------------------

869390.266

2.2 find the difference

145.5

- 81.6

-----------

63.9

2.3. find the quotiention

__2.81__

_2.3_| 64.63

- 46

-------------

186

-184

-------------

23

- 23

-------------

0

2.4. find the product

13.5

× 9.2

-------------

270

+ 12150

----------------

124.2

Answer:

how do we find this out

Step-by-step explanation:

The correct formula for the revenue generated by the item is Revenue = 200p - 5p^2.

The revenue generated by the item can be calculated by multiplying the price (p) by the unit sales (200 - 5p). Therefore, the correct formula for the revenue generated by the item is:

Revenue = Price x Unit Sales
Revenue = p(200 - 5p)
Revenue = 200p - 5p^2

The revenue generated by the item is a quadratic function of the price (p). To find the maximum revenue, we need to differentiate the function with respect to p and set it equal to zero:

dRevenue/dp = 200 - 10p = 0
10p = 200
p = 20

Therefore, the maximum revenue is generated when the price of the item is $20. Substituting p = 20 in the revenue formula, we get:

Revenue = 200(20) - 5(20^2) = $2000

Hence, the correct formula for the revenue generated by the item is Revenue = 200p - 5p^2, and the maximum revenue is achieved when the price of the item is $20, generating a revenue of $2000.

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The area of the continuous uniform probability distribution is rectangular. The correct option is c.

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Answer:

I believe it would be the first option