Sarah donated $920 for a new park. Sarah's brother donated $850. How much more money did Sarah donate?

Answer:

0.2857 is not a rational number.

Step-by-step explanation:

Because rational numbers have to be greater than 1. Decimals are not over 1 so it is not a rational number. Your welcome!

The auction rule you mentioned is known as the "Vickrey-Clarke-Groves" (VCG) auction. In the VCG auction, the highest bidder wins the object but pays the externality they impose on others.

The payment made by the highest bidder is equal to the difference between the social cost with them participating and the social cost without them participating.

In the case of a single object auction with n potential buyers, the VCG auction proceeds as follows:

This payment rule ensures that the winner pays the externality they impose on others, which incentivizes truthful bidding. In other words, it encourages buyers to bid their true valuations because bidding higher or lower than their true valuation would not affect the outcome of the auction but could impact their payment.

The VCG auction is a theoretical construct and may not be practically implemented in all scenarios due to various complexities and practical considerations. However, it serves as a benchmark for understanding desirable properties of auction mechanisms, such as efficiency and truthfulness.

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Answer:

standard

Step-by-step explanation:

Answer:

5/8

Step-by-step explanation:

I have the same problem and this answer was correct.

The table shows the number of games a team won and lost last season with a ratio of win to loss as 3:2. Therefore the tool most appropriate for use is a 5-section spinner with congruent sections, 3 representing a win and 2 representing a loss.

Ratio, in math, is a term that is used to compare two or more numbers. It is used to indicate how big or small a quantity is when compared to another. In a ratio, two quantities are compared using division.

here, we have,

To calculate a win-to-loss ratio, divide the number of wins by the number of losses.

According to the given data:

Greg is creating a simulation, using previous year’s wins and losses, to foretell the team's conclusion.

Wins in the last season = 24

losses in the last season = 16

Ratio of wins and losses = 24:16 = 3:2

Chances of the team winning out of 5 matches is 3 and losing is 2.

The device which is most suitable for application in a simulation that implements the data is a 5-section spinner with congruent sections, 3 representing a win and 2 representing a loss.

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complete question:

the table shaws the number of games a team won and lost last season. Wins and losses last season number of games wins 24 losses 16 greg has tickets to six of the team’s games this season. He is designing a simulation, using last year’s wins and losses, to predict whether the team will win or lose each of the games he attends. Which tool is most appropriate for use in a simulation that fits the data?

1 a coin with one side representing a win and the other representing a loss

2 a 6-section spinner with congruent sections, 4 representing a win and 2 representing a loss

3 a 5-section spinner with congruent sections, 3 representing a win and 2 4representing a loss an 8-sided die with 5 sides representing a win and 3 sides representing a loss

Answer:

1 shirt costs $11.2 1 hat costs $10.

Step-by-step explanation:

35 divided by 3

20 divided by 2

Answer:

a

Step-by-step explanation:

Answer:

It converges

Step-by-step explanation:

dx/dy = x∧4 + 9x∧21

f(x) = ∫(x∧4 + 9x∧21)dy        0  > f(x) > ∞

= x∧5/5 + 9x∧22/22 + c  

    x = ∞ and x = 0

∴ c = 1 /5 +  9/22 = 27/22

Answer:

I've put the red dot where location is.

Step-by-step explanation:

The probability that a randomly selected American plans to stay home or travel by car over the next holiday weekend given the information that 9.35% of Americans plan to travel by car and 88.6% plan to stay home. The probability of staying home or traveling by car over the next holiday weekend is given by the addition of probabilities of these events.

P(stay home or travel by car) = P(stay home) + P(travel by car)P(stay home or travel by car) = 0.886 + 0.0935P(stay home or travel by car) = 0.9795Therefore, the probability that a randomly selected American plans to stay home or travel by car over the next holiday weekend is 0.9795.

The value of probability does not equal 1 because some Americans traveled by other means.

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The equation y = 150 - 0.01x^2 represents the height of the kite above the ground as a function of its horizontal position x. The kite travels a distance of 80 ft.

The equation y = 150 - 0.01x^2 represents the height of the kite above the ground as a function of its horizontal position x. This is a downward-opening parabola, with the vertex at (0, 150) and the axis of symmetry along the y-axis.

To find the distance traveled by the kite, we need to determine the range of x over which the kite is flying. In this case, the range is from x = 0 to x = 80 ft.

The distance traveled by the kite is the difference between the initial and final positions of x. In this case, it is 80 - 0 = 80 ft.

Therefore, the kite travels a distance of 80 ft.

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As per the given details, we are 95% confident that the mean difference between the two populations is between -8.86 and 9.86.

Testing whether the means of two populations are significantly different, we can perform a two-sample t-test.

Given that:

Sample data for Population 1: 19, 17, 3.9

Sample data for Population 2: 19, 13.8, 4.6

Using a significance level of α = 0.05, we can conduct the two-sample t-test.

Calculating the sample means:

X1 = (19 + 17 + 3.9) / 3 = 13.3

X2 = (19 + 13.8 + 4.6) / 3 = 12.8

Calculating standard deviations (s₁ and s₂):

s₁ = sqrt(((19 - 13.3)² + (17 - 13.3)² + (3.9 - 13.3)²) / 2) ≈ 8.16

s₂ = sqrt(((19 - 12.8)² + (13.8 - 12.8)² + (4.6 - 12.8)²) / 2) ≈ 5.44

Calculating the test statistic:

t = (X1 - X2) / sqrt((s₁² / n₁) + (s₂² / n₂))

 = (13.3 - 12.8) / sqrt((8.16² / 3) + (5.44² / 3))

 ≈ 0.489

Degrees of freedom (df) = n₁ + n₂ - 2 = 3 + 3 - 2 = 4

Since |t| = 0.489 < 2.776, we fail to reject the null hypothesis.

Constructing a 95% confidence interval for the mean difference, we can use the formula:

Confidence Interval = (X1 - X2) ± t * sqrt((s₁² / n₁) + (s₂² / n₂))

Using the given values and a confidence level of 95%:

X1 - X2 = 13.3 - 12.8 = 0.5

t (with df = 4, α/2 = 0.025) ≈ 2.776

The standard error:

SE = sqrt((s₁² / n₁) + (s₂² / n₂)) = sqrt((8.16² / 3) + (5.44² / 3)) ≈ 3.37

Confidence Interval = 0.5 ± 2.776 * 3.37

                  = 0.5 ± 9.36

                  ≈ (-8.86, 9.86)

Thus, we are 95% confident that the mean difference between the two populations is between -8.86 and 9.86.

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Answer:

77 degrees

Step-by-step explanation:

All triangle add up to 180 degrees and right triangle all have one angle that is 90 degrees so 90 + 14 is 104 and 180 - 104 is 77.

Answer:

76 degrees

Step-by-step explanation:

What we know:

1. the triangle is a right triangle, meaning on angle has to be 90 degrees

2. One angle is 14 degrees

3. A triangle's angles add up to 180 degrees.

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

90+14+x=180

104+x=180

x=76

Answer:

y = -1/3x + 4

Step-by-step explanation:

(-9, 7) and (3, 3)

Slope:

m=(y2-y1)/(x2-x1)

m=(3-7)/(3+9)

m=(-4)/12

m= -1/3

Slope-intercept:

y - y1 = m(x - x1)

y - 7 = -1/3(x + 9)

y - 7 = -1/3x - 3

y = -1/3x + 4

Step-by-step explanation:

[tex]soln \\ \frac{3 - 7 }{3 - - 9} \\ = \frac{ - 4}{ - 12} \\ = \frac{1}{3 } \\ \frac{y - 7}{x - 3} = \frac{1}{3} \\ then \: you \: cross \: multiplication. \\ 3(y - 7) = 1(x - 3) \\ 3y - 7 = x - 3 \\ 3y = x - 3 + 7 \\ 3y = x + 4 \\ \frac{3y}{3} = \frac{x}{3} + \frac{4}{3} \\ y = \frac{x}{3} + \frac{4}{3} [/tex]

Answer:

y intercept is (0, 2/3)

Step-by-step explanation:

the y-inetercept is 0

i don’t know the exponential

growth or exponential decay but you can use math.way to help you answer the question

Answer:

The volume of the cube is 46.87 in^3

Step-by-step explanation:

V=6A3/2

36=6·783/2

36≈46.87217in³

Answer:

126 yds will be your answer.

Step-by-step explanation:

30+(24+24)+4+2+(3+3)+(4+30+2)=126

just add all of the sides up.

Answer:

9 servings

There should be an answer to that. Answer: There are 9 servings. step- by- step Explanation: We would first divide 22.5/2.5. This will give us the amount of time 2.5 will go into 22.5, providing us with the amount of servings

Step-by-step explanation:

Answer:she added another 3000 to the answer

Step-by-step explanation:she was supposed to add the same amount as the first time so the amount should be $7591.92. hope this helps and I want brainliest.

Regression analysis is a statistical technique used to examine the relationship between a dependent variable (Y) and one or more independent variables (X). This analysis is used to establish whether the dependent variable is affected by changes in the independent variables.

When performing regression analysis, we use various terms such as deterministic, stochastic, and least squares. Let us examine these terms and their implications in regression analysis:

Deterministic regression

Deterministic regression is a type of regression that assumes a perfect relationship between the dependent and independent variables. This type of regression analysis assumes that the independent variables have a direct linear relationship with the dependent variable. The regression equation in deterministic regression is of the form: Y=a + bX. The term a is the Y-intercept of the regression line, while b represents the slope of the regression line. A change in the value of X by one unit will result in a change in Y by b units.

Stochastic regression

Stochastic regression is a type of regression that assumes a probabilistic relationship between the dependent and independent variables. In this type of regression, the independent variable is considered to be random. The relationship between the dependent and independent variables is not perfect, but it is characterized by some random error. The regression equation in stochastic regression is of the form: Y=a + bX + ε. The term ε represents the error term in the regression equation. The error term is a random variable that represents the difference between the predicted value and the actual value.

Least squares regression

Least squares regression is a statistical method that is used to estimate the parameters of a linear regression model. This method aims to find the line of best fit for the given data set. The line of best fit is the line that minimizes the sum of the squared residuals. The residuals are the differences between the observed values and the predicted values. The least squares regression method is used in both deterministic and stochastic regressions. This method ensures that the regression line passes as close as possible to all the data points. This method can be used to estimate the values of the parameters a and b in the regression equation Y=a + bX. In conclusion, the terms deterministic, stochastic, and least squares are used in regression analysis to explain the relationship between the dependent and independent variables. These terms are crucial in regression analysis because they help us to understand the nature of the relationship between the variables.

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GIS can assist in location decision-making by combining geography with demographic analysis, automating center-of-gravity problems, providing spatial data for transportation planning, enhancing factor-rating analysis with spatial considerations, and indirectly informing Internet placement for virtual storefronts.

Geographic Information Systems (GIS) can assist in location decision-making by combining geography with demographic analysis (D). GIS technology enables the integration and analysis of various spatial data, including demographic information such as population density, income levels, and consumer behavior.

By overlaying geographic data with demographic data, decision-makers can gain valuable insights into the characteristics and preferences of target markets, helping them identify suitable locations for their businesses.

GIS can automate center-of-gravity problems (C) by applying spatial analysis techniques to determine optimal locations based on factors such as customer demand, transportation networks, and supply chain considerations.

By utilizing GIS, businesses can identify central points or distribution hubs that minimize transportation costs and maximize accessibility to target markets.

While GIS doesn't directly update transportation method solutions (A), it can provide valuable spatial data and analysis that inform transportation planning. This includes mapping and visualizing existing transportation infrastructure, identifying traffic patterns, and optimizing routes for efficient logistics.

Although GIS doesn't computerize factor-rating analysis (B) per se, it can enhance this process by providing a spatial dimension. Factor-rating analysis involves evaluating potential locations based on multiple factors such as cost, labor availability, and market proximity. GIS can incorporate spatial data, such as the proximity of suppliers or competitors, into the factor-rating analysis, enabling more informed decision-making.

GIS may indirectly contribute to providing good Internet placement for virtual storefronts (E). By analyzing factors such as population density, internet infrastructure, and connectivity patterns, GIS can help businesses identify areas with a high potential for online customer engagement. However, the direct responsibility of Internet placement lies more within the realm of network infrastructure and internet service providers.

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The correct answer is:

D. 0.981.

To calculate the probability that the sample mean IQ is greater than 115, we need to use the concept of sampling distribution and the central limit theorem.

Given:

Population mean (μ) = 112

Population standard deviation (σ) = 25

Sample size (n) = 300

The mean of the sampling distribution of the sample means (μx) will be the same as the population mean (μ) which is 112.

The standard deviation of the sampling distribution (σx) can be calculated using the formula:

σx = σ / √(n)

Plugging in the values:

σx = 25 / √(300)

≈ 1.443

Now, we can use the z-score formula to standardize the sample mean:

z = (x - μx) / σx

where x is the sample mean.

Plugging in the values:

z = (115 - 112) / 1.443

≈ 2.08

Next, we need to find the probability that the standardized sample mean (z) is greater than 2.08.

This can be done by looking up the z-score in the standard normal distribution table or by using a calculator or statistical software.

Using a standard normal distribution table or calculator, we find that the probability associated with a z-score of 2.08 is approximately 0.981.

Therefore, the correct answer is:

D. 0.981.

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Answer:

C = (5F - 160)/9

Step-by-step explanation:

Given:

F = 9/5C + 32

Solve the formula for C in terms of F

F = 9/5C + 32

F - 32 = 9/5C

C = (F - 32) ÷ 9/5

C = (F - 32) × 5/9

= (5F - 160)/9

C = (5F - 160)/9

Answer:

60 delivery vans

Step-by-step explanation:

Smaller company:

Pickup truck : delivery van = 3 : 4

If the larger company has 45 pickup trucks

Let x = number of delivery vans

Larger company:

Pickup truck : delivery van = 45 : x

Equate both ratios

3 : 4 = 45 : x

3/4 = 45/x

Cross product

3 * x = 4 * 45

3x = 180

x = 180/3

x = 60

x = number of delivery vans = 60

The statements with symbolic notation using the given predicates logic are:

1. Nothing strictly physical has consciousness. ∀x(Px → ¬Cx)

2. Minds exist. ∃x(Mx)

3. All minds have consciousness and subjectivity. ∀x(Mx → (Cx ∧ Sx))

4. No minds are strictly physical things. ∀x(Mx → ¬Px)

Predicate logic is a formal system of symbolic logic that extends propositional logic by introducing variables, predicates, quantifiers, and quantified statements. It allows for the representation and manipulation of relationships between objects, properties, and relations.

In predicate logic, symbols are used to represent various components:

1. Variables: Variables are used to represent individual elements or objects in a domain of discourse. They are typically denoted by lowercase letters such as x, y, z, and so on.

2. Predicates: Predicates are used to express properties or relations between objects. They are represented by uppercase letters followed by parentheses, such as P(x), Q(x, y), R(x, y, z), where x, y, z are variables.

3. Quantifiers: Quantifiers are used to express the scope of variables in a logical statement. The two main quantifiers are:

- Universal quantifier (∀): It is used to express that a statement holds for all elements in the domain. For example, ∀x P(x) means "For all x, P(x)."

- Existential quantifier (∃): It is used to express that there exists at least one element in the domain for which a statement holds. For example, ∃x P(x) means "There exists an x such that P(x)."

4. Logical symbols: Predicate logic uses logical symbols to represent logical connectives, negation, implication, and equivalence. The main logical symbols are:

- Conjunction (∧): Represents logical "and."

- Disjunction (∨): Represents logical "or."

- Negation (¬): Represents logical "not."

- Implication (→): Represents logical "if-then."

- Equivalence (↔): Represents logical "if and only if."

These symbols are used to construct complex logical statements by combining predicates, variables, and quantifiers. The goal is to provide a precise and formal language for reasoning about relationships and properties within a domain of discourse.

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Answer: True

Explanation:

1 centimeter = 10 millimeters

Buster = 75 millimeters long

Bubbles = 60 millimeters long