Can anyone pls help

Can Anyone Pls Help

Answers

Answer 1

Answer:

50

Step-by-step explanation:

if im thinking right

im SOO sorrYYy if its wrong


Related Questions

Just give me some ideas for this please.
Using what you know about fair and unfair games, as well as expected value, design a game that will be fair to both you and the player. Be creative in your design, trying not to mimic anything that you have already seen in this course or in searching the internet. Include a thorough description as well as a visual representation of the game that includes evidence of fairness.

Answers

Answer:

For game ideas, try to make a game that everyone will want to play. Make it fun, challenging, but still beatable, but not too easy. One thing you could do is a trivia game! With lots of different subjects so people can choose what they get questions about. Also, do a lot of research to get the questions! Hope this helped :)

Step-by-step explanation:

Answer:

KING OF QUESTIONS!!!

Step-by-step explanation:

Each player starts out with 10 tokens ( tokens can be anything I recommend spare change or coins. ) the tokens will be used as point tallies at the end of the game.  But to determine who goes first the question master asks a question from the starting deck( The easiest questions) and starting with player one the players answer and whoever answers with the correct answer will go first, the other players will form an orderly line from closest to the correct answer to farthest. ( If there are more than 1 successful answers you pull another card from the next deck. This is an increase in difficulty. And it will keep increasing until there is one person with the correct or closest answer or until they reach the end of the final deck. Remember that this event is highly unlikely) After this is done the game begins.  The question master asks a question the players will answer. The players that get it correct will receive 2 token. The players that do not but are close get 1 and the player to get the farthest from the correct answer loses 1 token. ( Tokens are worth 1 point.)

Roles:

Player 1 ( Answers the questions.)

Player 2 ( Answers the questions.)

Player 3 ( Answers the questions.)

Player 4 ( Answers the questions.)

Question Master & Token Master ( Asks the questions and gives the token to the correct answer. )

How to Win:

Quick Match- Play until a player reaches 30 tokens.

Long Match- Play until all but one player is eliminated.

Ways to Lose-  If a player loses all of there tokens or is cheating they are eliminated, this happens only when the player is caught cheating or stealing tokens from other players or when the player loses all of these tokens due to incorrect answers.

why does the quadratic formula work all the time

Answers

the quadratic formula work all the time because it is suitable for every equation.

please help 6th grade math please please help

Answers

i: 1

ii: 6

iii: 3

iv: 2

v: 4.5

vi: 2.5

I’m doing this in my class too!
Least value is 1 kilometer
Median is 3 kilometers
Upper quartile is 4.5 kilometers
Greatest value is 6 kilometers
Lower quartile is 2 kilometers
Interquartile range is 2.5 kilometers

I dont know how to do this​

Answers

Answer:

a) 55°

b) 125°

c) 55°

d) 55°

Step-by-step explanation:

a) 180-(90+35) = 55

b) this angle forms a straight angle with ∡a

c) this angle is vertical, and congruent, with ∡a

d) 180-(70+55) = 55

Verify the following properties of the Fourier transform = 1. (Fu)(E) = 27 (F-1u)(-5) 2. (F (eiat u)) (E) = (Fu)(8 + a)

Answers

The first property states that the Fourier transform of a function evaluated at a certain frequency is equal to 2π times the inverse Fourier transform of the function evaluated at the negative of that frequency.

The second property states that the Fourier transform of a modulated function is equal to the Fourier transform of the original function shifted by the modulation frequency.

To verify the given properties of the Fourier transform, we can use the definitions and properties of the Fourier transform. Here's how we can verify each property:

1. Property: (Fu)(ω) = 2π (F^-1u)(-ω)

To verify this property, we need to use the definitions of the Fourier transform and its inverse. Let's denote the Fourier transform operator as F and its inverse as F^-1.

According to the definition of the Fourier transform, for a function u(t), its Fourier transform is given by:

(Fu)(ω) = ∫[from -∞ to ∞] u(t) e^(-iωt) dt

Similarly, the inverse Fourier transform of a function U(ω) is given by:

(F^-1U)(t) = (1/2π) ∫[from -∞ to ∞] U(ω) e^(iωt) dω

Now, let's substitute -ω for ω in the inverse Fourier transform:

(F^-1u)(-ω) = (1/2π) ∫[from -∞ to ∞] u(t) e^(i(-ω)t) dt

= (1/2π) ∫[from -∞ to ∞] u(t) e^(iωt) dt

Comparing this with the Fourier transform, we see that (F^-1u)(-ω) is equal to (Fu)(ω) multiplied by 2π, which verifies the first property.

2. Property: (F(e^(iat)u))(ω) = (Fu)(ω + a)

To verify this property, we use the modulation property of the Fourier transform. According to this property, if u(t) has a Fourier transform U(ω), then the Fourier transform of e^(iat)u(t) is given by:

(F(e^(iat)u))(ω) = (Fu)(ω + a)

Applying this property to the given expression, we have:

(F(e^(iat)u))(ω) = (Fu)(ω + a)

This verifies the second property.

In summary, we have verified both properties of the Fourier transform as stated.

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I really need help!!!!!!​

Answers

Answer:

y = 1.50x + 4 ;

Step-by-step explanation:

Given that bike rental cost $4 plus $1.50 per hour

From the information given, the change in y per unit change in x is the value of the slope ;

Therefore, Given that total cost = y and x) number of hours

Change in cost per change in number of hours) 1.50 = slope ; intercept = constant = $4

The equation, in slope intercept form :

y = mx + c

y = 1.50x + 4

The lengths of time (in years) it took a random sample of 32 former smokers to quit smoking permanently are listed.

11.8 14.4 10.8 10.4 16.2 20.5 12.6 10.4 19.5 14.2 12.8 17.6 15.9 21.2 18.4 22.9 7.9 11.4 9.5 17.2 14.5 21.7 16.8 12.9 8.9 16.3 21.3 13.6 17.4 13.7 7.8 19.8

Assume the population standard deviation is 6.6 years. At α=0.09, is there enough evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years? Complete parts (a) through (e).

(a) Identify the claim and state the null hypothesis and alternative hypothesis.
(b) Identify the standardized test statistic. Use technology. ​
(c) Find the​ P-value. Use technology.
(d) Decide whether to reject or fail to reject the null hypothesis and​
(e) interpret the decision in the context of the original claim at the 10 ​% level of significance.

Answers

a. The null hypothesis is H₀: μ = 14 and alternative hypothesis is Ha: μ ≠ 14

b. The t-test for the data is 1.11

c. The p-value for the t-test is 0.28

d. We accept the null hypothesis since the p-value is greater than the significance value.

e. The decision to fail to reject the null hypothesis means that we do not have enough evidence to support the claim

What is the null and alternative hypothesis?

(a) The claim is that the mean time it takes smokers to quit smoking permanently is 14 years.

Null hypothesis (H₀): The mean time it takes smokers to quit smoking permanently is 14 years.

H₀: μ = 14

Alternative hypothesis (Ha): The mean time it takes smokers to quit smoking permanently is not 14 years.

Ha: μ ≠ 14

(b) To identify the standardized test statistic, we can use the formula:

t = (x - μ) / (s / √n)

where:

x is the sample mean,

μ is the population mean,

s is the population standard deviation,

n is the sample size.

Given:

Sample mean (x) = 15.29375 (rounded to 5 decimal places)

Population mean (μ) = 14

Population standard deviation (s) = 6.6

Sample size (n) = 32

Using these values, we can calculate the standardized test statistic.

t = (15.29375 - 14) / (6.6 / √32)

t = 1.11

(c) To find the p-value, we need to use the t-distribution table or statistical software. Since using technology is mentioned in the question, we will use it to calculate the p-value.

The p-value for a two-tailed test is approximately 0.28.

(d) We compare the p-value to the significance level α = 0.09.

Since the p-value 0.28 is greater than the significance level (0.09), we fail to reject the null hypothesis.

(e) The decision to fail to reject the null hypothesis means that we do not have enough evidence to support the claim that the mean time it takes smokers to quit smoking permanently is different from 14 years at the 10% level of significance.

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NO LINKS!! Please help me out this is causing me stresss PLSS I posted this so many times and no answer plsss be kind and help me :’) Write the slope-intercept inequality for the graph below. If necessary, use <=
fors or >= for >

Answers

Answer:

Consider this option:

1. the equation of given line is y=-x-3 (it is easy to find it using points (0;-3)&(-3;0)).

2. according to the equation of line: y≥-x-3

Determine the value of x in the triangle shown.



Question 2 options:

180°


45°


135°


90°

Answers

Answer:

135

Step-by-step explanation:

Hello There!

The angle that has a measure of 45° and x are supplementary angles meaning that the sum of the two angles is 180

so x can be found by subtracting the given angle (45 in this case) from 180

180 - 45 = 135

so x = 135

Answer:

135

Step-by-step explanation:

When there's a completely straight line the angle is 180 and when u have a angle already there you subtract 180 from the angle in this case 180-45=135

Rationalise √2+√3/3√2-2√3=a-b√6

Answers

Answer: 3√6-6/6 + √2=a-b√6

Step-by-step explanation: multiply radicals in the denominator by conjugate to get (a+b)(a-b)=a^2-B^2 pattern.

Use The Figure Below to Solve For x.

Answers

Answer:

x=-1

Step-by-step explanation:

Hello there!

The information we are given:

We are told that the distance from point a to c is x + 10

We are told that the distance from a to b is 5

we are also told that the distance from b to c is 2x+6

Because from point A to B and B to C is inside the total of A to C we can add the two together and create a equation to solve for x

so the sum of the two parts 5 + 2x + 6

*combine like terms*

11 + 2x

is equal to the total distance (x+10)

now we solve for x

11 + 2x = x + 10

step 1 subtract x from each side by

2x - x =  x

x -x cancels out

now we have 11 + x = 10

step 2 subtract 11 from each side

11-11 cancels out

10 - 11 = -1

we're left with x = -1

Now lets plug in x and see if A to C is equal to A to B + B to C

(-1) + 10 = 5 + 2(-1) + 6

10 - 1= 9

2*-1=-2

6-2=4

4+5=9

9=9

which is true so we can conclude that x = -1

Calculate the 90% confidence interval for the following sample Sample: 7.9, 8.3, 8.4, 9.6, 7.7, 8.1, 6.8, 7.5, 8.6, 8, 7.8,7.4, 8.4, 8.9, 8.5, 9.4, 6.9,7.7. Assume normality of the data.

Answers

The 90% confidence interval for the given sample is (7.58, 8.60).

To calculate the 90% confidence interval for the given sample assuming normality of the data, we need to use the formula as follows;Confidence interval = X ± Z α/2(σ/√n)Where, X is the sample meanZ α/2 is the Z-score for the desired level of confidenceσ is the population standard deviationn is the sample sizeFirst, we need to calculate the sample mean and standard deviation.Sample mean,

X= (7.9 + 8.3 + 8.4 + 9.6 + 7.7 + 8.1 + 6.8 + 7.5 + 8.6 + 8 + 7.8 + 7.4 + 8.4 + 8.9 + 8.5 + 9.4 + 6.9 + 7.7) / 18

= 8.09

Sample standard deviation,

σ = √[Σ(xi - X)² / (n - 1)]σ = √[(7.9 - 8.09)² + (8.3 - 8.09)² + (8.4 - 8.09)² + (9.6 - 8.09)² + (7.7 - 8.09)² + (8.1 - 8.09)² + (6.8 - 8.09)² + (7.5 - 8.09)² + (8.6 - 8.09)² + (8 - 8.09)² + (7.8 - 8.09)² + (7.4 - 8.09)² + (8.4 - 8.09)² + (8.9 - 8.09)² + (8.5 - 8.09)² + (9.4 - 8.09)² + (6.9 - 8.09)² + (7.7 - 8.09)² / (18 - 1)]σ = 0.761

Now, we need to find the Z α/2 value from the standard normal distribution table.

Z α/2 = 1.645 (for 90% confidence level)Putting the values in the formula,Confidence interval =

X ± Z α/2(σ/√n)

= 8.09 ± 1.645(0.761/√18)

= 8.09 ± 0.511

= (8.09 - 0.511, 8.09 + 0.511)

= (7.58, 8.60).

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What does the C equal to in -1/6 +7/6 = c

Answers

Answer:

c = 1

Step-by-step explanation:

we have -1/6 + 7/6

since 6 is a common denominator we can do

[tex]\frac{-1}{6} +\frac{7}{6} = c\\\frac{-1+7}{6} = c\\\frac{6}{6} = c\\1 = c\\c = 1[/tex]

algebra 1 student journal 5.2 puzzle time did you hear about the pug that built himself a home

Answers

No, I haven't heard about the pug that built himself a home. Could you please provide more information or context about the puzzle in Algebra 1 Student Journal 5.2? I'll do my best to assist you with it.

Did you hear about the pug that built himself a home?" is more of a riddle or a joke rather than a puzzle from an Algebra 1 Student Journal. It doesn't appear to be directly related to an algebraic problem or concept.

If you have any specific algebraic problems or questions from the Algebra 1 Student Journal, please let me know, and I'll be happy to assist you with them.

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Solve the following ordinary differential equations using Laplace trans- forms: (a) y(t) + y(t) +3y(t) = 0; y(0) = 1, y(0) = 2 (b) y(t) - 2y(t) + 4y(t) = 0; y(0) = 1, y(0) = 2 (c) y(t) + y(t) = sint; y(0) = 1, y(0) = 2 (d) y(t) +3y(t) = sint; y(0) = 1, y(0) = 2 (e) y(t) + 2y(t) = e';y(0) = 1, y(0) = 2

Answers

(a) The ordinary differential equation is given by y(t) + y(t) + 3y(t) = 0. Using Laplace transform, we have(L [y(t)] + L [y(t)] + 3L [y(t)]) = 0L [y(t)] (s + 1) + L [y(t)] (s + 1) + 3L [y(t)] = 0L [y(t)] (s + 1) = - 3L [y(t)]L [y(t)] = - 3L [y(t)] /(s + 1)Taking the inverse Laplace of both sides, we have y(t) = L -1 [- 3L [y(t)] /(s + 1)]y(t) = - 3L -1 [L [y(t)] /(s + 1)]

On comparison, we get y(t) = 3e^{-t} - 2e^{-3t}.The initial conditions are y(0) = 1 and y(0) = 2 respectively.(b) The ordinary differential equation is given by y(t) - 2y(t) + 4y(t) = 0. Using Laplace transform, we have L [y(t)] - 2L [y(t)] + 4L [y(t)] = 0L [y(t)] = 0/(s - 2) + (- 4)/(s - 2)

Taking the inverse Laplace of both sides, we have y(t) = L -1 [0/(s - 2) - 4/(s - 2)]y(t) = 4e^{2t}.The initial conditions are y(0) = 1 and y(0) = 2 respectively.(c) The ordinary differential equation is given by y(t) + y(t) = sint. Using Laplace transform, we have L [y(t)] + L [y(t)] = L [sint]L [y(t)] = L [sint]/(s + 1)

Taking the inverse Laplace of both sides, we have y(t) = L -1 [L [sint]/(s + 1)]y(t) = sin(t) - e^{-t}.The initial conditions are y(0) = 1 and y(0) = 2 respectively.(d) The ordinary differential equation is given by y(t) + 3y(t) = sint. Using Laplace transform, we have L [y(t)] + 3L [y(t)] = L [sint]L [y(t)] = L [sint]/(s + 3)Taking the inverse Laplace of both sides, we have y(t) = L -1 [L [sint]/(s + 3)]y(t) = (1/10)(sin(t) - 3cos(t)) - (1/10)e^{-3t}.

The initial conditions are y(0) = 1 and y(0) = 2 respectively.(e) The ordinary differential equation is given by y(t) + 2y(t) = e^{t}. Using Laplace transform, we have L [y(t)] + 2L [y(t)] = L [e^{t}]L [y(t)] = 1/(s + 2)Taking the inverse Laplace of both sides, we havey(t) = L -1 [1/(s + 2)]y(t) = e^{-2t}The initial conditions are y(0) = 1 and y(0) = 2 respectively.

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Find the distance between the points (–7,–9) and (–2,4).

Answers

Answer:

√194 or 13.9

Step-by-step explanation:

√(x2 - x1)² + (y2 - y1)²

√[-2 - (-7)² + [4 - (-9)]

√(5)² + (13)²

√25 + 169

√194

= 13.9

Somebody know this? thanks

Answers

Answer:

4 right angles

Step-by-step explanation:

a straight light intersects  another straight line= creating 4 right angles

i am a factor of 40 when you pair me with 15, my lcm of 15, i am not one

Answers

The number you are is 2.

Let's break down the information provided:

You are a factor of 40 when paired with 15.

Your least common multiple (LCM) with 15 is not equal to 1.

To find the number that satisfies these conditions, let's examine the factors of 40. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. Now, we need to find a number from this list that is a factor of 40 when paired with 15.

To find the LCM of 15 and each factor of 40, we can compare their multiples:

For 15 and 1: LCM = 15

For 15 and 2: LCM = 30

For 15 and 4: LCM = 60

For 15 and 5: LCM = 15 (already the smaller number)

For 15 and 8: LCM = 120

For 15 and 10: LCM = 30 (already the smaller number)

For 15 and 20: LCM = 60 (already the smaller number)

For 15 and 40: LCM = 120 (already the smaller number)

From the list, we can see that the LCM of 15 with 5, 10, 20, and 40 is equal to 15. However, the problem states that the LCM of 15 with the number is not equal to 1. Thus, the number that satisfies both conditions is 2, as the LCM of 15 and 2 is 30, and it is not equal to 1. Therefore, the number you are is 2.

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A car drove 5 miles in 30 minutes. How far will the car go in 1 hour? ​

Answers

Answer: 10 miles

Step-by-step explanation:

Practically, just look at it.  30 minutes = 5 miles, 60 minutes = 10 miles

Mathmatically, find the constant of proportionality.

30 minutes divided by 5 miles = 6 minutes per 1 mile. 60 minutes = 10 miles

the circumference of a circle is 64π. what is the radius of the circle?

Answers

The radius of the circle can be found by dividing the circumference by 2π. In this case, the radius is 32.

The formula for the circumference of a circle is given by C = 2πr, where C is the circumference and r is the radius. We are given that the circumference is 64π.

To find the radius, we can rearrange the formula as r = C / (2π). Substituting the given value of the circumference, we have r = 64π / (2π) = 32.

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Rectangle
EFGH
was translated 4 units to the left and 6 units up. Which rule
describes the translation that was applied to rectangle EFGH to create rectangle
E'F'G'H?
(x,y) → (X-4.7+6)
(x,y) → (X-6.7+4)
(x,y) → (X+4.7-6)
(x,y) → (-44,64)

Answers

Answer:

(x, y) -- [X-4, Y+6]


Answer?
I 3 sum of Σ ? n=1 4 What is the sum of 04 03 01 02 O The series diverges.

Answers

The sum of the series Σ(n = 1 to 4) n is 10.

We have,

The concept used to find the sum of the series Σ(n=1 to 4) n is called summation or addition.

In mathematics, summation is a way to express the total of a series of numbers.

The notation Σ (capital sigma) is used to represent summation.

It is followed by the index variable (in this case, n) which indicates the values being summed, and the range or condition under which the summation is performed (in this case, n=1 to 4).

The series Σ(n=1 to 4) n represents the sum of the numbers from 1 to 4.

The notation Σ (capital sigma) denotes the sum and the expression

(n = 1 to 4) indicates the range of values over which the sum is taken.

To find the sum, we add up all the numbers in the given range.

In this case, we have:

1 + 2 + 3 + 4 = 10.

Thus,

The sum of the series Σ(n = 1 to 4) n is 10.

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Jenica bowls three games and scores an average of 116 points per game. She scores 105 on her first game and 128 on her second game. What does she need to score on her third game to get a mean score of ?

Answers

Answer:

230

Step-by-step explanation:230

Manuel makes 8 dollars for each hour of work. Write an equation to represent his total pay p after working h hours.
p and h are variables

Answers

Answer:

p = 8h

A very short answer, I know, but reading this out loud reads "Manuel's pay is equal to 8 dollars an hour."

Answer:

p=8h

Step-by-step explanation:

because he gets paid 8 dollars ever hour he works so if you multiple the hours he works to 8 dollars you get his total pay

HELP ME FIND AREA :D thanks :3

Answers

Answer:

the actual answer is 3,240 is the answer

3,240 is the answer

Which is greater 7500,000 m or 750 km

Answers

Step-by-step explanation:

both are equal

pls Mark brainliest

In the figure shown, line AB is parallel to line CD. Part A: What is the measure of angle x? Show your work. (5 points) Part B: Explain how you found the measure of angle x by identifying the angle relationships that you used along the transversal. (5 points) AB and CD are parallel lines, and PQ and PR are transversals which intersect AB at P and CD at Q and R. Angle APQ is labeled as 65 degrees, angle QPR is equal to x, angle PRD is equal to 120 degrees.

Answers

Answer:

120 degrees

Step-by-step explanation:

im a god cuz happppy

Answer:

120 lol

Step-by-step explanation:

Helppppp it’s due today

Answers

C I’m pretty sure. Sorry if wrong but I did the work.

can someone help me please?? my teacher gave me a worksheet of a game with no rules or nun nd expected me to know how to play, she is ignoring me. ion know what to do. what do i do??

Answers

I would continue how to solve them in and out functions and email the principle or counselor that the teacher is not answering your questions on your worksheet

MSL7

Dificuit Dimensions

A tool box has the dimensions of 8 in by 7 in by 4 in. If Jacob plans to double all three

dimensions to build a larger tool box, he believes he would double the volume of the tool box,

Is he correct?

Answers

Wrong. As you double each length, you double the volume. This means that by doubling all three dimensions, you would cube 2.

8x7x4 would be 224 cubic inches

Multiply all those numbers by two, 16x14x8, and you get 1,792 cubic inches.

Divide 1,792 by 224

Your answer is 8x the original volume

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REQUIRED: i) Discuss when process costing system are appropriate and give examples; ii) Explain the term "equivalent units" and how to calculate; and iii) Compare the two methods used in computing the value of work in progress. What exponential has a value of 729? PENN FOSTER ENG 4 URGENT NEED THESE ANSWERS FAST 1.Which of the following sentences uses a semicolon correctly? A. Before metal hoops with backboards; players used peach baskets. B. The first basketball games; were played with a soccer ball. C. Basketball is a popular sport; it's easy to learn and play. D. Basketball was invented by a Canadian; named James Naismith.2. Which detail from "The Necklace" provides evidence that supports the theme of never being satisfied? A. Mr. Loisel will do anything to make Matilda happy, even selling his prized gun her. B. Matilda is sad despite having a new dress for the ball, leading her to borrow the necklace. C. Mrs. Forestier thinks that Matilda should have returned the necklace sooner. D. Matilda suggests that her husband to her give the invitation to another woman.3. How does the author separate thoughts in the following passage? She was simple, not being able to adorn herself; but she was unhappy, as one out of her class; for women belong to no caste, no race; their grace, their beauty, and their charm serving them in the place of birth and family. A. Colons B. Dependent clauses C. Independent clauses D. Semicolons4. In lines 6-7 of "The New Colossus," who can the reader infer that the light welcomes? A. Oppressed people (exiles) B. The Statue of Liberty C. Those who hope to be a beacon of light D. Those who are proud of their history and heritage5.The necklace in the story symbolizes A. that greed will take everything you Own. B. that things aren't always what they appear. C. the internal conflict Matilda faces. D. that hard times won't last.6.Which of the following sets the events of the plot in motion? A. Matilda's poor luck to be born in a class below her her beauty B. Matilda's desire to be "better" than she is, and part of a higher class C. Mrs. Forestier's insistence that Matilda return the necklace quickly D. Mr. Loisel's inability to find the lost necklace7. Which of the following words best describes Mrs. Forestier? A. Spiteful B. Selfish C. Giving D. Dishonest8. Which of the following excerpts is an example of irony in "The Necklace?"A. Mr. Loisel doesn't love Matilda when she loses her beauty her. B. Matilda loses her beauty her because of a falsely beautiful necklace. C. Matilda doesn't want the cloak her to COver her necklace her. D. Mrs. Forestier remains beautiful and carefree.9.Which of the following sayings means that, no matter the change in circumstances, you can't escape your inner self? A. A bird in the hand is worth two in the bush. B. It don't mean a thing if it ain't got that swing. C. Wherever you go, there you are. D. A stitch in time saves nine.10. Many of Guy De Maupassant's stories criticized the bourgeoisie, or A. ruling class. B. lower class. C. middle class. D. upper class. Mr. Brown opened a new account with a deposit of $4,000. - The account earned annual simple interest. - He did not make any additional deposits or withdrawals. - At the end of 4 years, the balance was $4,400. What is the annual interest rate on this account? O 5% O 2.5% O 10% O 7.5% A Swedish study examined gingival bleeding in 164 pairs of same-sex twins of which one twin had low exposure to smoking, while the other had high exposure to smoking. The reasons for using this co-twin control design include pair matching for sex, age, and genetic factors, and that confounding factors such as oral hygiene and food habits are also likely to be matched within a pair. The aim of the study is to test whether smoking is associated with higher risk of gingivitis. The study found that in 40 pairs the low-exposed twin had gingivitis while the high-exposed twin did not, in 23 pairs the high-exposed twin had gingivitis while the low-exposed twin did not, while in the remaining 101 pairs the twins had same status: in 15 pairs both had gingivitis and in 86 pairs both did not have gingivitis.a. Which type of study design applies to this study: paired or independent samples?b. Write the 22 table cross-tabulating the pairs of exposed and unexposed twins in terms of their gingivitis status (yes/no).c. The research hypothesis is that smoking is associated with gingivitis. For the statistical analysis, what are the null and alternative hypotheses?d. Perform a statistical test for the null hypothesis, using hand calculations. Interpret your results The fall of the Soviet Union in 1991 led to (a) the rise of dictatorships in Western Europe (b) greater economic and political freedom among the nations of Eastern Europe (c) more nations in Eastern Europe turning towards a Communist economic system (d) the spread of communism among the nations in Africa, Asia, and Latin America.