according to a recent survey, 67% of cell-phone owners find themselves checking their phone for messages, alerts, or calls even when they don't notice their phone ringing or vibrating. suppose we randomly select 5 cell-phone owners.

The correct option is A) With sample size 10, the tails of the curve of the t-distribution have more area than the tails of the curve of the z-distribution.

Explanation:Given:P(t > 1.96) = 0.0408P(t < -1.96) = 0.0408The t-distribution is different from the z-distribution because it has a thicker tail.The tail is thicker since the t-distribution is determined by the sample size, whereas the z-distribution is determined by the population size (the t-distribution is estimated with the standard error of the mean in this case).

A t-distribution with small degrees of freedom has a much thicker tail than a z-distribution with the same degrees of freedom. Because sample size is related to the degrees of freedom, it makes sense that t-distributions with smaller sample sizes will have thicker tails.

The population variance is replaced with the sample variance in the estimation of the t-distribution. As a result, the t-distribution has heavier tails than the z-distribution.

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Answer:

y = {18 x + 14, 14 - 15 x, 14 - 39 x}

Step-by-step explanation:

There is zero context to this, so I have no clue if this helps or even answers your question. Try harder with the question next time.

The Perimeter of the parallelogram whose vertices are given by the coordinates (3 ,6), (-5, 6), (6, -1), (-2, -1) is: 16 + 2√(58)

To find the perimeter of the parallelogram, we need to find the distance between each pair of adjacent vertices and add them up.

First, let's find the distance between (3, 6) and (-5, 6). This is simply the difference between their x-coordinates, which is 3 - (-5) = 8.

Next, let's find the distance between (-5, 6) and (-2, -1). To do this, we need to find the difference between their x-coordinates and their y-coordinates, and then use the Pythagorean theorem. The difference in x-coordinates is -5 - (-2) = -3, and the difference in y-coordinates is 6 - (-1) = 7. So the distance between these two points is √((-3)^2 + 7^2) = √(58).

We can use the same method to find the distance between (6, -1) and (3, 6), which is also √(58).

Finally, we need to find the distance between (6, -1) and (-2, -1), which is simply the difference between their x-coordinates, which is 6 - (-2) = 8.

Adding up all these distances, we get 8 + √(58) + √(58) + 8 = 16 + 2√(58).

So the exact perimeter of the parallelogram is 16 + 2√(58)

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The solution for the last equation: 2y + 2z * 2z x is 167 where a slice of watermelon is x,  a grape is y, and one apple is z.

Let a slice of watermelon be x

Let one grape be y

Let one apple be z

2x + 4y + 2x = 30

4x + 4y = 30 ----- (1)

x + x + 2z = 28

2x + 2z = 28 --- (2)

4y + 2y + z = 31

6y + z = 31 ----(3)

Solving simultaneously for x, y, and z:

4x + 4y = 30 ----- (1)

2x + 2z = 28 --- (2)

6y + z = 31 ----(3)

We can simplify equation (1) by dividing both sides by 4, which gives:

x + y = 7.5 ----- (1')

We can simplify equation (2) by dividing both sides by 2, which gives:

x + z = 14 ----- (2')

We can use equation (1') to solve for y in terms of x:

y = 7.5 - x ----- (4)

We can use equation (2') to solve for z in terms of x:

z = 14 - x ----- (5)

Now we can substitute equations (4) and (5) into equation (3) to solve for x:

6(7.5 - x) + (14 - x) = 31

45 - 6x + 14 - x = 31

59 - 7x = 31

-7x = -28

x = 4

Now we can use equation (4) to solve for y:

y = 7.5 - x = 7.5 - 4

y = 3.5

And we can use equation (5) to solve for z:

z = 14 - x = 14 - 4

z = 10

Solving for the last equation: 2y + 2z * 2x

2 * 3.5 + 2 * 10 * 2 * 4 = = 167

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Therefore, the school sold 20 Popsicles and 30 Kona Ice.

A system of equations is a set of two or more equations that are to be solved simultaneously. The variables in the equations are related to each other in such a way that they must satisfy all the equations in the system.

Given by the question.

Let's assume that the number of Popsicles sold is "x" and the number of Kona Ice sold is "y".

From the problem, we know that each Popsicle costs $2 and each Kona Ice costs $4, and the total amount sold is $160. Therefore, we can write two equations based on the given information:

2x + 4y = 160 (equation 1)

x + y = 50 (equation 2)

We can solve this system of equations by substitution or elimination. Let's use substitution:

From equation 2, we can solve for "x" in terms of "y":

x = 50 - y

Substituting this expression for "x" into equation 1, we get:

2(50 - y) + 4y = 160

Simplifying and solving for "y", we get:

100 - 2y + 4y = 160

2y = 60

y = 30

So, the number of Kona Ice sold is 30.

Substituting this value of "y" back into equation 2, we get:

x + 30 = 50

x = 20

So, the number of Popsicles sold is 20.

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Sofia's favorite bag of chips were on sale for $5 for two bags. If she wanted to buy seven bags, the cost would be $17.50.

To calculate this, we need to use the formula for finding the total cost of a given number of items: Total Cost = Number of Items x Cost Per Item.In this case, we need to find the total cost of seven bags, so the equation looks like this: Total Cost = 7 x $5.

We can solve this equation by multiplying the two numbers together. 7 multiplied by 5 equals 35. However, the question is asking us to find the total cost of seven bags, which is $17.50. To convert the answer from 35 to 17.50, we need to divide 35 by two: 35 divided by 2 equals 17.50.

Therefore, the cost of seven bags of Sofia's favorite chips would be $17.50.

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The correct conclusion that can be drawn from the plot is that the plant population had a significantly lower mean root length after the major drought occurred.

Explanation:

A frequency polygon is a graphical representation of a frequency distribution using line segments connected to points that indicate the midpoint of each class interval.

The horizontal axis shows the measurement variable, while the vertical axis shows the number of occurrences of the variable for each bin. The midpoint of each bin is used to represent the distribution of data that falls within that bin's range.

Since the values of adjacent bins overlap, the lines are connected. The points are connected by straight lines in a frequency polygon.

In this case, the conclusion that can be drawn from the plot is that the plant population had a significantly lower mean root length after the major drought occurred.

The peak of the frequency polygon has shifted to the left, indicating that the majority of plants have a shorter root length. The decrease in the mean root length of the plant population is due to the impact of the major drought on the island.

As a result, no plant reproduction took place, indicating a decrease in the plant population.

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Step-by-step explanation:

PART A:

No, the baton cannot lie flat on a diagonal along the base of the box. The diagonal of the base can be found using the Pythagorean theorem as follows:

d = sqrt(6^2 + 8^2)

d = sqrt(36 + 64)

d = sqrt(100)

d = 10

The diagonal of the base is 10 inches, which is less than the length of the baton (11 inches). Therefore, the baton cannot lie flat on the diagonal of the base.

PART B:

Yes, the baton could fit along the interior diagonal of the box. The interior diagonal can be found using the Pythagorean theorem as follows:

d = sqrt(6^2 + 8^2 + 6^2)

d = sqrt(36 + 64 + 36)

d = sqrt(136)

d ≈ 11.66

The interior diagonal of the box is approximately 11.66 inches, which is greater than the length of the baton (11 inches). Therefore, the baton could fit along the interior diagonal of the box.

Answer: 4/9 ≅ 0.4444444 = four ninths. ... Then simplify the result to the lowest terms or a mixed number.

Answer:

13,161.5

Step-by-step explanation:

5x3= 15 then go over and carry the one then do 5x9= 45+1= 46 then go over to 3 and carry the four and 5x3= 15+4= 19 put 9 down and carry the one then 5x3= 10+1= 11 after x the 0 the repeat what you did and add up the final numbers so 239.5x 55= 13161.5

The inverse function for the given function F(x)=1/x² -3x +1  is given by

f⁻¹(x) =(3 ± √(9 + 4/(x - 1))) /2.

Function f(x) is equals to,

F(x)=1/x² -3x +1

Inverse of a function, we need to swap the positions of the x and y variables and then solve for y.

Let's start with the original function

f(x) = 1/x^2 - 3x + 1

Now we will swap x and y,

⇒ x = 1/y^2 - 3y + 1

Next, Solve for y in terms of x

⇒ x = 1/y^2 - 3y + 1

⇒ x - 1 = 1/y^2 - 3y

⇒ 1/(x - 1) = y^2 - 3y

⇒ 1/(x - 1) = y(y - 3)

⇒ y(y - 3) = 1/(x - 1)

⇒ y^2 - 3y - 1/(x - 1) = 0

Using the quadratic formula, solve for y to get inverse function we have,

y = (3 ± √(9 + 4/(x - 1))) / 2

Therefore, the inverse function of f(x) is equal to f⁻¹(x) =(3 ± √(9 + 4/(x - 1))) /2.

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The above question is incomplete, the complete question is:

F(x)=1/x squared -3x +1 then Find the inverse

The mean number of patients who recover is 8, and the variance is 1.6.

This scenario follows a binomial distribution, where the number of patients who recover from the disease out of a sample of ten patients follows a binomial distribution with parameters n = 10 (sample size) and p = 0.8 (probability of success).

The mean (μ) and variance (σ^2) of a binomial distribution are given by

μ = np

Substitute the values in the equation

= 10 x 0.8

Multiply the numbers

= 8

σ^2 = np(1-p)

Substitute the values in the equation

= 10 x 0.8 x (1-0.8)

= 1.6

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The admission fee at an amusement park is $4.25 for children and $7.00 for adults. on a certain day, 303 people entered the park, and the admission fees collected totaled 1824 dollars. There are 108 children and 195 adults were admitted

Let the number of children admitted = C and the number of adults admitted = A

Total number of people admitted = 303

We can form two equations from the given information.

The first equation is to represent the number of people admitted in terms of children and adults.

So, the equation will be

C + A = 303 ------(1)

The second equation represents the total amount collected from admission fees.

So, the equation will be

4.25C + 7A = 1824 ------(2)

Multiplying equation (1) by 4.25, we get

4.25C + 4.25A = 1289.25 ------(3)

Subtracting equation (3) from equation (2), we get:

7A - 4.25A = 1824 - 1289.25

Simplifying, we get:

2.75A = 534.75

Dividing by 2.75, we get:

A = 195

Putting A = 195 in equation (1), we get:

C + 195 = 303

Simplifying, we get:

C = 108

So, there were 108 children and 195 adults admitted on that day.

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This inequality represents that the weight of Duri's backpack is w < 45

Given that

Weight = Less than 45 pounds

We can use the inequality symbol to represent Duri's weight limit as follows:

w < 45

This inequality states that the weight of Duri's backpack, represented by w, must be less than 45 pounds.

Any weight value for w that satisfies this inequality is within Duri's weight limit and can be carried in their backpack.

For example, if Duri's backpack weighs 30 pounds, then w = 30 satisfies the inequality w < 45, so Duri can carry this weight.

However, if the backpack weighs 50 pounds, then w = 50 does not satisfy the inequality w < 45, so Duri cannot carry this weight.

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A dependent variable that maintains constant measurements throughout an experiment will be depicted by a straight, horizontal line in a graph.

In an experiment, the dependent variable is the variable being measured, and it is expected to change in response to changes in the independent variable. However, if the dependent variable remains constant throughout the experiment, it indicates that it is not affected by the independent variable.

When such a situation arises, the data points for the dependent variable will be located at the same level or value, resulting in a horizontal line in the graph.

This straight, horizontal line represents the constant measurements of the dependent variable, and it can provide valuable insights into the nature of the relationship between the independent variable and the dependent variable.

A dependent variable that maintains constant measurements throughout an experiment may indicate a flaw in the experimental design, such as an incorrect assumption about the nature of the relationship between the independent variable and the dependent variable, or an uncontrolled confounding variable.

Therefore, it is important to carefully analyze the data and the experimental design to identify and address any potential issues.


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Answer:

64 im pretty cxsure

Step-by-step explanation:

Answer:

0

-10++10=0

+10 can be rewritten as 10

-10+10=0

:)

the simplified expression is: (X*(2x - 1) - 1)/(2x*(x+1))

The given expression is:

X/(x+1) - 1/(1-1+2x) = X/(x+1) - 1/(2x)

To simplify this expression, we need to find a common denominator. The denominator of the first term is (x+1) and the denominator of the second term is 2x. To get a common denominator, we can multiply the first term by 2x and the second term by (x+1).

So, the expression becomes:

(2xX)/[(x+1)2x] - (1(x+1))/[(1-1+2x)(x+1)]

Simplifying further, we get:

(2xX - (x+1))/(2x(x+1))

Now, we can simplify the numerator by distributing the X term and combining like terms:

(2xX - x - 1)/(2x(x+1))

We can factor out an X from the numerator:

(X*(2x - 1) - 1)/(2x*(x+1))

Therefore, the simplified expression is:

(X*(2x - 1) - 1)/(2x*(x+1))

In summary, the given expression is simplified by finding a common denominator and then simplifying the resulting expression by distributing and factoring. The final expression is the simplified form of the given expression.

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From the given information provided, the measurement of the area of the beads jenny used is 28mm².

The area of a circle is given by the formula A = πr², where r is the radius of the circle. Since the diameter of the bead is 6 millimeters, the radius is half of that, which is 3 millimeters.

Substituting r = 3 mm into the formula, we get:

A = π(3 mm)²

A = π(9 mm²)

A = 28.27 mm²

Rounding this to the nearest whole number, we get:

A = 28 mm²

Therefore, the measurement closest to the area of the bead in square millimeters is 28 mm².

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Step-by-step explanation:

Mathematics for Social Science 1011 PDF

The solution to the system of equations is: x = 1/2 and y = 4. The steps and justification are given below.

Given the equations, -4x + y = 2 and 4x + y = 6, the following shows the justification for each step taken to solve the system.

Step                                   Justification                                            

1. 2y = 8                            1. Add the equations

2. y = 4                             2. Divide each side by 2

3. 4x + y = 6                     3. Write equation 2

4. 4x + (4) = 6                   4. Substitute 4 for y

5. 4x = 2                           5. Subtract 4 from each side

6. x = 1/2                           6. Divide each side by 4

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Step-by-step explanation:

The membership fee for one Adult is £120, and the membership fee for one Junior is 1/5 of the Adult fee, which is:

1/5 x £120 = £24

So the total membership fee for 2 Adults and 3 Juniors is:

2 x £120 + 3 x £24

= £240 + £72

= £312

Therefore, the total membership fee for 2 Adults and 3 Juniors is £312.

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In San Antonio, Texas it rain more in a year, on average when compared to Austin, Texas according to the mean of both cities.

Data of Austin, Texas is as follows:

36.00, 21.41, 52.27, 22.33, 34.70, 46.95, 16.07, 31.38, 37.76 and 19.68.

Number of values ( n ) = 10

Sum of the values = 318.23

Average of the rainfall in Austin, Texas is equal to:

Mean = Total sum / No. of Values

Mean = 318.23 / 10

Mean = 31.82 in

Data of San Antonio, Texas is as follows:

46.27, 28.45, 45.32, 16.54, 21.34, 47.25, 13.76, 30.69, 37.39 and 17.59.

Number of values ( n ) = 10

Sum of the values = 304.6

Average of the rainfall in San Antonio, Texas is equal to:

Mean = Total sum / No. of Values

Mean = 304.6 / 10

Mean = 30.46 in

So, comparatively the average of San Antonio is higher.

Therefore in San Antonio, Texas it rain more in a year, on average when compared to Austin, Texas.

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If the square of Ethan's age is added to Jordan's age, the result is [tex]56[/tex], which equals Ethan's age. The answer is that Ethan is [tex]6[/tex] years old.

A person's birth date is compared to the day on which their age has to be computed as part of the age calculation process. The age of the individual is calculated by subtracting the person's age from the given date. Provided Date - Birthdate is used to compute age.

A person's age is merely a measurement of how long they have been living. These metrics don't adequately describe who you are or what you have accomplished. At any age, either old or young, one may do anything.

The solution states that [tex]56[/tex] is equal to [tex]4[/tex] times Jordan's age multiplied by the square of Ethan's age. This may be expressed as an equation:

[tex]x^2 + 4(x-1) = 56[/tex]

Simplifying the equation:

[tex]x^2 + 4x - 4 = 56[/tex]

[tex]x^2 + 4x - 60 = 0[/tex]

We can solve this quadratic equation by factoring:

(x+10)(x-6) = 0

Therefore, [tex]x = -10[/tex] or [tex]x = 6[/tex]. We can discard the negative value since age cannot be negative, so Ethan's age is [tex]6[/tex].

To check, we can substitute x=6 into the original equation:

[tex]6^2 + 4(6-1) = 36 + 20 = 56[/tex]

So the solution is Ethan is [tex]6[/tex] years old.

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Strings of 6 letters of the English alphabet containing one vowel: 2,832,240, exactly two vowels: 2,233,200, at least one vowel: 10,919,736, least two vowels: 8,087,496 and number of strings of length n with exactly k vowels: nCk * 5Ck * 21^(n-k)

There are 26 letters in the English alphabet, out of which 5 are vowels (A, E, I, O, U). To find the number of strings of 6 letters of the English alphabet that contain one vowel, we can choose the position of the vowel in 6C1 ways and fill the remaining positions with any of the 21 consonants in 21C5 ways.

Therefore, the total number of such strings is 6C1 * 21C5 = 2,832,240.

To find the number of strings with exactly two vowels, we can choose the positions of the vowels in 6C2 ways and fill them with any of the 5 vowels in 5C2 ways. We can fill the remaining positions with any of the 21 consonants in 21C4 ways.

Therefore, the total number of such strings is 6C2 * 5C2 * 21C4 = 2,233,200.

To find the number of strings with at least one vowel, we can subtract the number of strings with no vowels from the total number of strings. The number of strings with no vowels is 21^6 (since there are 21 consonants and we can choose any of them for each of the 6 positions).

Therefore, the number of strings with at least one vowel is 26^6 - 21^6 = 10,919,736.

To find the number of strings with at least two vowels, we can subtract the number of strings with one vowel or no vowel from the total number of strings. The number of strings with one vowel is 2,832,240 (as we found earlier) and the number of strings with no vowels is 21^6.

Therefore, the number of strings with at least two vowels is 26^6 - 2,832,240 - 21^6 = 8,087,496.

To find the number of strings of length n with exactly k vowels, we can choose the positions of the k vowels in nCk ways and fill them with any of the 5 vowels in 5Ck ways. We can fill the remaining positions with any of the 21 consonants in 21^(n-k) ways.

Therefore, the total number of such strings is nCk * 5Ck * 21^(n-k).

Hence, the number of strings of 6 letters of the English alphabet containing one vowel is 2,832,240, while the number of strings with exactly two vowels is 2,233,200. The number of strings with at least one vowel is 10,919,736, and the number of strings with at least two vowels is 8,087,496.

Finally, the number of strings of length n with exactly k vowels is nCk * 5Ck * 21^(n-k).

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The graph of a certain geometric sequence can be described as a curve increasing from left to right. A sequence that would have a similar graph is the geometric sequence whose common ratio is less than 1.

A geometric sequence is defined as a sequence of numbers where each number is the product of the previous number and a fixed constant. The fixed constant is known as the common ratio, and it is denoted by r.The nth term of a geometric sequence is given by the formula an= ar^(n-1) where a is the first term and r is the common ratio of the sequence.

Similar graphIn a similar graph, the shape of the graph is the same, but the size may be different. Thus, the sequence that would have a similar graph to the given sequence is a geometric sequence whose common ratio is less than 1 because in such a sequence, the successive terms will be smaller than the previous term.This means that as we move from left to right, the values will gradually decrease in size, and the graph will look like a curve increasing from left to right.

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Answer: 37.5

Step-by-step explanation:

The three interior angles of a triangle measure z degrees , (x+5)degrees , and (x+25) degrees. So, the measure of one of the three angles is x+5.

The sum of the interior angles of a triangle is always 180 degrees.

Therefore, we can write an equation using the given angle measures:

z + (x+5) + (x+25) = 180

Simplifying the equation, we get:

2x + 30 + z = 180

Subtracting 30 and z from both sides, we get:

2x = 150 - z

Dividing both sides by 2, we get:

x = (150 - z) / 2 - 5

So the measure of one of the three angles is x+5, which is:

x + 5 = [(150 - z) / 2 - 5] + 5

x + 5 = (150 - z) / 2

x + 5 = 75 - z/2

Therefore, one of the angles measures (x+5) degrees.

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The best interpretation of the z score of 0. 47 from the sample proportion is C. The sample proportion is 0.47 standard errors greater than the hypothesized value of the population proportion.

The z-score, also known as the standard score, represents the number of standard deviations a data point or observation is away from the mean of a distribution.

A sample proportion with a z-score of 0.47 can be best understood as the sample proportion is 0.47 standard errors higher than the population proportion's estimated value.

This means that the observed sample proportion is 0.47 standard deviations above the hypothesized population proportion under the null hypothesis.

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