When are the lower and upper quartiles calculated by finding the average of two values

Answer:it would be 1385

Step-by-step explanation:because 850 miles per hour converted into meter per min would be 22799.04 meters per sec and then u would Find the number in the whole number place

4

and look one place to the right for the rounding digit on the right side of the decimal point

7

.Round up if this number is greater than or equal to

5

and round down if it is less than

5

1385

The speed in meters per minute is 22799.

Given that,

Based on the above information, the calculation is as follows:

We know that

1 miles per hour = 26.822 meters per minute

So for 850 it should be 22799.

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The expected value of the estimator over many random samples would be equal to the true population slope.

As per the definition of the unbiased estimator, we know that the estimator is said to be unbiased if the expected value of the estimator is equal to the population parameter. This means the expected value of the estimator over many random samples would be equal to the true population slope.

In probability theory, the expected value (also called expected value, expected value, mathematical expected value, mean, mean, or first moment) is a generalization of weighted average. Informally, the expected value is the arithmetic mean of a large number of independently selected random variables.

To find the expected value E(X) or mean μ of a discrete random variable X, simply multiply each value of the random variable by its probability and add the products. The formula is given as E(X) = μ = ∑ x P(x).

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We need to find the angle (rounded to the nearest whole degree) of a circle that would represent the percent of students taking mathematics.

Since a complete turn around the circle has 360º, we have the following proportion:

Number of students Angle

734 360º

442 x

Then, cross multiplying the above values, we obtain:

Answer: 217º

Answer:

217°

Step-by-step explanation:

The fraction of students taking math is   442/734

 we need this same fraction of the 360 degrees in a circle

442/734 * 360 = 217°

Answer:

2.4cm

Step-by-step explanation:

the area of a triangle is

baseline × height / 2

that means two lengths of the triangle have to be multiplied.

and to have 2 similar triangles means that all lengths inside one triangle are the corresponding lengths inside the other triangle multiplied by the scaling factor f.

multiplying 2 if these lengths with each other means also including the square of the scaling factor (multiplying with the scaling factor twice).

so, if the area of triangle 1 is

"baseline 1" × "height 1" / 2 = 45 cm²

then the area of triangle 2 is

"baseline 2" × "height 2" / 2 =

= "baseline 1"×f × "height 1"×f /2 =

= "baseline 1" × "height 1" × f² / 2 =

= ("baseline 1" × "height 1" / 2) × f² =

= 45 × f² = 20 cm²

f² = 20/45 = 4/9

f = 2/3

so, for a side of ABC being 3.6cm long, that means the corresponding side in DEF is

3.6 × f = 3.6 × 2/3 = 7.2/3 = 2.4cm

The predicted cost for a student attending a arts college with 1,500 students and a rank of 4.5 can be calculated using the given regression model: Tuition = 7 + 4*Rank - 0.20*Size + 8*Private - 0.4*LibArts.

In this case, Rank = 4.5, Size = 1.5 (since it's measured in 1,000s), Private = 1 (since it's a private college), and LibArts = 1 (since it's a liberal arts college). Plugging these values into the model, the predicted tuition cost would be: Tuition = 7 + 4*(4.5) - 0.20*(1.5) + 8*1 - 0.4*1 = $26.1 thousand.

If the student switches from her current private liberal arts college to a public, non-liberal arts college with a rank 0.5 lower and 15,000 more students, we need to adjust the Size and Rank variables accordingly. Assuming the student's current college is still private, the new values would be Rank = 4.5 - 0.5 = 4 and Size = 1.5 + 15 = 16.5 (since it's measured in 1,000s). With the new values, we can calculate the predicted tuition cost for the public college: Tuition = 7 + 4*(4) - 0.20*(16.5) + 8*0 - 0.4*0 = $22.4 thousand.

To determine how much money the student saves in tuition, we calculate the difference between the predicted costs of the two colleges: $26.1 thousand - $22.4 thousand = $3.7 thousand. Therefore, by switching from her current private liberal arts college to a public, non-liberal arts college with a lower rank and larger size, the student saves $3.7 thousand in tuition.

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Answer:

I’m not good at math.

Step-by-step explanation:

I am not good at math I am failing in my math class right now

Answer:

Step-by-step explanation:

The correct answer is decreasing the confidence level, increasing the sample size.

A narrower confidence interval means that the range of possible values for the true population parameter is smaller, indicating greater precision in the estimate.

Increasing the sample size will increase the precision of the estimate of the population parameter, thus resulting in a narrower confidence interval.

On the other hand, decreasing the confidence level will also result in a narrower interval. Since the confidence interval represents a range of values that are likely to contain the true population parameter, a lower confidence level means that there is less uncertainty in the estimate of the population parameter, which leads to a narrower interval.

Increasing the sample size and lowering the confidence level are the correct responses.

A narrower confidence interval denotes more accuracy in the estimate because it reduces the range of potential values for the true population parameter.

A narrower confidence interval will be produced by increasing the sample size because it will improve the estimate of the population parameter's precision.

On the other hand, a narrower interval will be produced by lowering the confidence level. A lower confidence level indicates that there is less uncertainty in the estimate of the population parameter, which results in a narrower interval. The confidence interval reflects a range of values that are likely to contain the true population parameter.

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Answer:

-4 1/2

Step-by-step explanation:

The part of the function over the interval (-2,2) is nonlinear and decreasing.

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The probability that a student scored less than 55% on the exam is 0.134%.

It's the probability curve of a continuous distribution that's most likely symmetric around the mean. On the Z curve, at Z=0, the chance is 50-50. A bell-shaped curve is another name for it.

We have:

Mean of the sample = 70

Standard deviation = 5

= P(X<55%)

Z = (55-70)/5

Z = -3

P(X < -3)

From the Z table:

P(x<-3) = 0.0013499

or

P(x<-3) = 0.134%  

Thus, the probability that a student scored less than 55% on the exam is 0.134%.

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Net present value is a measure of profitability. The NPV of an investment is the net cash inflow received over the project's life, less the initial cash outflow, adjusted for the time value of money.

A higher NPV means the project is more lucrative. The profitability index measures the benefit-cost ratio of a project and is calculated by dividing the present value of future cash flows by the initial cash outflow. A profitability index greater than one indicates that the project will be profitable, whereas a profitability index less than one indicates that the project will not be profitable.

Calculation of Net Present Value (NPV) of Project AInitial Outlay = $454,000Net annual cash flows = $68,000Discount Rate = 9%Use the PV of an annuity of $1 table to determine the PV of net cash flows.Using the formula for NPV,NPV of Project A = PV of net cash flows – Initial OutlayNPV of Project A = 68,000 × 7.63930 – 454,000NPV of Project A = $56,201.85Calculation of Profitability Index of Project AProfitability Index of Project A = Present value of future cash flows / Initial OutlayProfitability Index of Project A = 68,000 × 7.63930 / 454,000Profitability Index of Project A = 1.14

Calculation of Net Present Value (NPV) of Project BInitial Outlay = $300,000Net annual cash flows = $47,000Discount Rate = 9%Use the PV of an annuity of $1 table to determine the PV of net cash flows.Using the formula for NPV,NPV of Project B = PV of net cash flows – Initial OutlayNPV of Project B = 47,000 × 6.10338 – 300,000NPV of Project B = $37,100.86Calculation of Profitability Index of Project BProfitability Index of Project B = Present value of future cash flows / Initial OutlayProfitability Index of Project B = 47,000 × 6.10338 / 300,000Profitability Index of Project B = 0.96

The NPV and profitability index calculations show that project A is the better investment since it has a higher NPV and profitability index than project B.

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Answer: Kylie did better in the second one than she did in the first one

Step-by-step explanation:

If you do 19 divided by 25 you will get 0.76 so she got a 76% on the first test. Then if you do 16 divided by 20 you will get 0.8 so she got a 80% on the second test.

important to know the size of the freshman classes in relation to the population size before using z-procedures in this situation, so the answer will be option C

In statistical inference, when using z-procedures such as hypothesis testing or constructing confidence intervals, one of the assumptions is that the samples are independent. In this scenario, knowing that the university had 6000 or more entering freshmen is important to ensure that the sample size is less than 10% of the population size.

The 10% condition is necessary to maintain the independence of samples. When the sample size is small relative to the population size, each sample observation has a greater impact on the population proportion, potentially violating the assumption of independence.

By ensuring that the sample size is less than 10% of the population size, we can reasonably assume that each sample observation is independent of each other. This allows us to use z-procedures and rely on the properties of the normal distribution for inference.

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Answer:

\( \boxed{ \bold{ \huge{ \boxed{ \sf{30x + 12}}}}}\)

Step-by-step explanation:

\( \sf{6(2x + 1) + 3(6x + 2)}\)

Distribute 6 through the parentheses

Similarly, distribute 3 through the parentheses

\( \dashrightarrow{ \sf{12x + 6 + 18x + 6}}\)

Collect like terms

\( \dashrightarrow{ \sf{12x + 18x + 6 + 6}}\)

\( \dashrightarrow{ \sf{30x + 6 + 6}}\)

Add the numbers : 6 and 6

\( \dashrightarrow{ \sf{30x + 12}}\)

Hope I helped!

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Zeetopia has an absolute advantage in producing coconuts as it produces more coconuts than Freshland. Zeetopia produces 50 tons of coconuts whereas Freshland also produces 50 tons of coconuts.(b) Zeetopia has a comparative advantage in producing coconuts.

It has the lowest opportunity cost of producing coconuts. Freshland has a higher opportunity cost of producing coconuts. Zeetopia has to give up 1.2 mangoes for each ton of coconuts it produces while Freshland has to give up 1.5 mangoes for each ton of coconuts it produces. Yes, specialization and trade under these terms would be beneficial to both Zeetopia and Freshland. They can gain from trade by specializing in the production of the goods for which they have a comparative advantage and then trading with each other. The terms of trade in this case are 1:1, which means one ton of coconuts for one ton of mangoes.

Zeetopia can specialize in producing coconuts and produce 100 tons of coconuts and 25 tons of mangoes. Freshland can specialize in producing mangoes and produce 60 tons of mangoes and 50 tons of coconuts. After trading, Zeetopia would have 25 tons of mangoes and 75 tons of coconuts and Freshland would have 25 tons of coconuts and 60 tons of mangoes. (d) The production possibility frontier (PPF) for Zeetopia and Freshland is shown in the graph below. The horizontal axis shows the production of coconuts, and the vertical axis shows the production of mangoes. The points A and B on the PPF show the production possibilities for Zeetopia and Freshland, respectively.

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Answer:

-7x(16)

Step-by-step explanation:

The only thing you can combine is the 7+9

Answer:

21 or 10

Step-by-step explanation:

I

Need to get myself together, I'm a mess

In Bikini Bottom, I'm with Sandy

Moesha keep on drinkin' all the brandy

Keisha eat the molly like it's candy

First, let's find each length of the city

To do that, find the square root of 900

l² = 900

l= 30 miles

The length of the city is 30 miles

We need to find the length on map

1 inch = 20 miles

x = 30 miles

20 x = 30

x=1.5 miles

The length is 1.5 miles on map

Hence the area on map is ;

Area = l² = 1.5² = 2.25

Hence the city area is 2.25 square inches

Answer: x= 4/k

Step-by-step explanation:

Answer:

B.) \(\frac{4}{k}\)

Step-by-step explanation:

\(3kx+24=9kx\\3(kx+8)=9kx\\\frac{3(kx+8)}{3}=\frac{9kx}{3}\\kx+8=3kx\\(kx+8)-kx=(3kx)-kx\\8=2kx\\\frac{8}{2k}=\frac{2kx}{2k}\\\frac{4}{k}=x\)

The cost of the skirt and blouse after the discount would be -

$52.8 and $56.1 respectively.

Given is that Laura has bought a skirt and a blouse for 66 euros, both had the same price but they have given her a 20% discount on the skirt and only 15% on the blouse.

The cost skirt would be -

${x} = 66 - {20% of 66}

${x} = 66 - {20/100 x 66}

${x} = 66 - {66/5}

${x} = 66 - 13.2

${x} = 52.8

The cost of blouse would be -

${y} = 66 - {15% of 66}

${y} = 66 - {15/100 x 66}

${y} = 66 - {3/20 x 66}

${y} = 66 - 9.9

${y} = 56.1

Therefore, the cost of the skirt and blouse after the discount would be -

$52.8 and $56.1 respectively.

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{Question in english -

Laura has bought a skirt and a blouse for 66 euros, both had the same price but they have given her a 20% discount on the skirt and only 15% on the blouse. How much did each item cost??

Step-by-step explanation:

y=kx k being the constant

Answer: 12

Step-by-step explanation:

This is a direct proportion and we use the formula:

y = kx

If y = −4 when x=2, we need to find the constant of proportionality. This will be:

y = kx

-4 = 2k

k = -4/2

k = -2

To find y when x=−6 guess this:

y = kx

y = -2 × -6

y = 12

Hence, The value of y = 12 when x = -6.

Given that , Y varies directly with x .

If y=−4 when x=2,

Find y when x=−6.

According to the question,

This is a direct variation , y = kx

If,

y = −4  when x=2,

y = kx

-4 = 2k

\(k = \frac{-4}{2}\)

k = -2

To find ;

y when x = −6

y = kx

y = (-2) (-6)

y = 12

Hence, The value of y = 12 when x = -6.

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No, the determinant of a matrix can only be calculated for square matrices. A square matrix has an equal number of rows and columns, while a non-square matrix has a different number of rows and columns.

The determinant is a mathematical property that is defined for square matrices only. It is a scalar value that represents certain characteristics of the matrix. To calculate the determinant of a square matrix, you can use various methods such as expansion by minors, cofactor expansion, or using the properties of determinants.

For example, let's consider a 3x2 non-square matrix:

```

A = [[1, 2],

    [3, 4],

    [5, 6]]

```

Since A is a non-square matrix, we cannot calculate its determinant.

the determinant is a concept applicable only to square matrices. Non-square matrices do not have a determinant.

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The value of k is ±24. Therefore, option (D) k = ±24 is correct.

Given that the quadratic relation y = x^2 + kx + 144 has only one root.There is only one root for this quadratic equation. We know that the quadratic formula is  x = (-b ± √(b²-4ac)) / (2a).If a quadratic equation has only one root, it must be a perfect square. In other words, the discriminant should be equal to zero.Discriminant of this equation is given as: b² - 4ac = k² - 4(1)(144) = k² - 576For a quadratic equation to have one root, the discriminant should be equal to zero. Hence, we can say that, k² - 576 = 0  ⇒ k = ±24Hence, the value of k is ±24. Therefore, option (D) k = ±24 is correct.

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Answer:

$993 left each week

Step-by-step explanation:

you would add $650 + $350 + $75 + $200 which equals to $1275

Then you add $1,500 + $750 which equals 2,250

Then you do $2,250 - $1275 which equals to $993

Hope this helps:)

Answer:

4⁻⁸/2⁻⁴ = 2²

Step-by-step explanation:

2 x 2 = 4 so that would be the base, then we have to add the two first powers... which would give us 4⁻⁸ divided by 2⁻⁴

After this we just have to divide the numbers, so 4 divided by 2 is 2, and then -8 +- -4 = 2  

I think its like that