The standard deviation for non-employed students is given as 0.524,
the margin of error is 0.083 and the 90% confidence interval for the mean GPAs of non-employed students is (3.147, 3.313).
Variables needed to solve the problem Sample size (n)
Sample mean, Sample standard deviation (s), Confidence level (CL)
Margin of error (E)
b. The standard deviation for non-employed students is given as 0.524.
c. Point estimate:
The point estimate for the mean GPA of non-employed students is the sample mean, which is given as 3.23.
Margin of error:
We can use the formula for the margin of error:
E = z(s/√n)
For a 90% confidence level, the critical value is 1.645.
E = 1.645(0.524/√114) = 0.083
Therefore, the margin of error is approximately 0.083.
d. Confidence interval:
The confidence interval is given by the formula:
(3.23 - 0.083, 3.23 + 0.083)
= (3.147, 3.313)
Therefore, the 90% confidence interval for the mean GPAs of non-employed students is (3.147, 3.313).
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Which inequality represents the situation "the temperature should be at least 40 degrees”?
Answer:
Step-by-step explanation:
The inequality that represents the situation "the temperature should be at least 40 degrees" is:
Temperature ≥ 40
This means that the temperature must be greater than or equal to 40 degrees.
can someone tell me how to find the area of a sector in a circle and if you can provide an example
Answer:
Step-by-step explanation:
Sector area is a portion of the circle's area.
formula is π r² × x/360°
where x is the central angle.
For example if the radius is 9 and the central angle is 120°.
π · 9² · 120/360
3.14 · 81 · 1/3 = 84.78 units²
or in terms of pi = [tex]\frac{1}{3}[/tex] (81π)
Divide the following polynomials using the long division model: (4×^4-5×^3+2×^2-X+5) / (x^2+x+1).
Part I: Express this problem using the standard format for a problem of dividend/divisor->
_______
divisor |dividend
Part II: Use this checklist to proceed through this problem:
• How many times does x^2 go into the largest term in the problem?
•write the value on top of the problem and multiply that value by ×^2+×+1
•write the product below the lowest line on your work and subtract if from what reminds in the problem
•continue this process until you fab no longer divide x^2 into what reminds in the problem
•include your remainder in the final answer
The quotient is [tex]4x^2[/tex] and the remainder is [tex]3x^2 - x + 5[/tex].
What is long division method?Long division is a mathematical method used to divide one number by another. It is typically used for division of larger numbers, and is taught as a basic arithmetic skill in elementary and middle school.
In long division, the dividend (the number being divided) is written on the top, and the divisor (the number dividing the dividend) is written on the left. The quotient (the answer to the division problem) is written on the top of the line below the dividend, with the remainder (the left-over amount after division) written on the right.
The process involves a series of steps, including dividing, multiplying, and subtracting. The steps are repeated until the dividend is fully divided, or until a specified level of precision is reached.
Long division is also used to divide polynomials, by using the coefficients of the terms in the polynomial instead of the actual numbers. This process is similar to long division of numbers, but involves additional steps to ensure that the division is performed correctly.
Now We want to divide the polynomial [tex]4x^4 - 5x^3 + 2x^2 - x + 5[/tex] by the polynomial [tex]x^2 + x + 1[/tex] using long division.
[tex]x^2 + x + 1 |[/tex] ([tex]4x^4 - 5x^3 + 2x^2 - x + 5[/tex] )
First, we divide the highest degree term of the dividend, [tex]4x^4[/tex], by the highest degree term of the divisor, [tex]x^2[/tex], to get [tex]4x^2[/tex] :
[tex]x^2 + x + 1 | 4x^4 - 5x^3 + 2x^2 - x + 5\\-4x^4 - 4x^3 - 4x^2\\-----------------------------\\x^3 + 2x^2[/tex]
Next, we multiply the divisor,[tex]x^2 + x + 1[/tex], by the quotient, [tex]4x^2[/tex], to get [tex]4x^4 + 4x^3 + 4x^2[/tex], and subtract it from the dividend:
[tex]x^2 + x + 1 | 4x^4 - 5x^3 + 2x^2 - x + 5\\-4x^4 - 4x^3 - 4x^2\\----------\\x^3 + 2x^2\\- 4x^2 - 4x - 4\\-------\\3x^2 - x + 5[/tex]
We now have a new polynomial, 3[tex]x^2 - x + 5[/tex], as the remainder. Since the degree of the remainder is less than the degree of the divisor, the division process is complete.
Therefore, the quotient is [tex]4x^2[/tex] and the remainder is [tex]3x^2 - x + 5[/tex]. We can write the original polynomial as:
[tex]4x^4 - 5x^3 + 2x^2 - x + 5 = (x^2 + x + 1)(4x^2) + (3x^2 - x + 5)[/tex]
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Plot the numbers -1 1/6 and 17/6 on the number line below.
The number line where we plotted -1 1/6 and 17/6 is added as an attachment
Plotting -1 1/6 and 17/6 on a number lineFrom the question, we have the following parameters that can be used in our computation:
-1 1/6 and 17/6
To start with, we convert both numbers to the same form
i.e. decimal or fraction
When converted to fractions, we have
-7/6 and 17/6
This means that we can plot -7/6 at -7 and 17/6 at point 17 where the difference in each interval is 1/6
Using the above as a guide, we have the following:
The number line is attached
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Find the equation (in terms of x) of the line through the points (-4,-1) and (3,-3)
Y=
The equation of the line through the points is 7y = -2x - 15.
What is the equation through the points?
The equation of a line that passes through two given points is calculated as follows;
y - y1 = m(x - x1)
Where;
m is the slope of lineThe slope is calculated as;
m = (y2 - y1) / (x2 - x1)
m = (-3 + 1) / (3 + 4)
m = -2/7
The equation of the line is calculated as;
y - y1 = m(x - x1)
y - (-1) = (-2/7)(x - (-4))
y + 1 = (-2/7)(x + 4)
y + 1 = (-2/7)x - (8/7)
y = (-2/7)x - (15/7)
7y = -2x - 15
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What formula could you use to help find the area of the given triangle?
Angle Addition Postulate
Pythagorean Theorem
Midpoint Formula
The formula that will be useful in finding the area of the triangle is: Pythagoras theorem
How to find the area of a triangle?The formula to find the area of the triangle is expressed by the formula:
A = ¹/₂bh
Where:
b is base
h is height
Now, we have the base but we don't have the height.
Pythagoras Theorem is defined as the way in which we find the missing length of a right angled triangle.
The triangle has three sides, namely the hypotenuse (which is always the longest), Opposite (which doesn't touch the hypotenuse) and the adjacent (which is between the opposite and the hypotenuse).
Pythagoras is in the form of;
a² + b² = c²
where c is the hypotenuse
Thus, to find the height of the triangle, we will use Pythagoras theorem to get:
h = √(6² - 4²)
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Help me please I need help
Answer:
(2,5] or (7,∞)
Step-by-step explanation:
110° M NOT DRAWN TO SCALE N In the diagram, O is the centre of the circle MNP. If ZMOP = 110°, find the value of x.
The value of angle x is determined as 55⁰.
What is the measure of angle x?The measure of angle x can be calculated by applying circle theorem which states that the angle at the center of a circle is twice the angle at the circumference of a circle.
This theorem is known as, "Angle at the Center Theorem" or "Central Angle Theorem". It states that the angle formed by two radii (lines segment from the center of the circle to any point on the circumference) of a circle is always twice the size of the angle formed by the same arc (portion of the circumference) when measured at the circumference.
The value of angle x is calculated as follows;
from the given figure;
m ∠MOL = 2 m∠MNL
110⁰ = 2x
x = ¹/₂ x 110⁰
x = 55⁰
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HELP asap lota points
MILKSHAKES
In addition to cones, you have decided to sell milkshakes. You ordered three
different sizes of cups shown below. Calculate the volume of each cup shown Use
314 for pl and round to the nearest hundredth
MIN
Total
SMALL
2DN%
6.5IN
Total
MEDIUM
2.5 IN
8 IN
Total
LARGE
6PN
Workspace for the Small Milkshake
(Show your work here.)
The volume of each milkshake cup is given by
small cup = 50.24 square inches
medium cup =127.56 square inches
Large cup =226.08 square inches
Shape of the milkshake cups is cylindrical.
Formula used to calculate volume of each cup = πr²h
Where 'r' is the radius of cups.
And h is the height of the cups
Radius of small milkshake cup = 2in.
height of small cup = 4in.
Volume of the small cup = π × 2² × 4
= 50.24 square inches
Radius of medium milkshake cup = 2.5in.
height of medium cup = 6.5in.
Volume of the medium cup = π × 2.5² × 6.5
= 127.56 square inches
Diameter of large cup = 6in
Radius of large milkshake cup = 3in.
height of large cup = 8in.
Volume of the large cup = π × 3² × 8
= 226.08 square inches
Therefore, the volume of each milkshake cup using given radius and height are as follow,
volume of small cup = 50.24 square inches
volume of medium cup =127.56 square inches
volume of Large cup =226.08 square inches
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sasha bout a car for 22995; six years later it was worth 12645, if depreciation was linear how much did the value of the car go down each year?
The value of the car went down by an average of $1,725 each year over the six-year period.
What is Depreciation?Depreciation is the loss in value of an asset due to factors such as age, wear and tear, market conditions, and obsolescence. It is usually calculated on a linear basis, meaning that the same amount of depreciation is spread evenly over a period of time.
In this case, the car was purchased for $22,995, and six years later it was worth $12,645.
To calculate the linear depreciation of the car, we need to subtract the value at the end of the period from the value at the beginning, and divide by the number of years:
Depreciation = ($22,995 - $12,645) / 6
Depreciation = $1,725
This means that the car depreciated by an average of $1,725 each year. In other words, the value of the car went down by an average of $1,725 each year over the six-year period.
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Consider the series ∑n=0∞2e−n.
a. The general formula for the sum of the first n terms is S_n=__?__. Your answer should be in terms of n.
b. The sum of a series is defined as the limit of the sequence of partial sums, which means ∑n=0∞2e−n=limn→∞=(__?__)=(__?__).
c. Select all true statements (there may be more than one correct answer):
A. The series is a telescoping series (i.e., it is like a collapsible telescope).
B. The series converges.
C. The series is a geometric series.
D. The series is a p-series.
a. The general formula for the sum of the first n terms is Sₙ = 2(1 - e⁻ⁿ)/(1 - e⁻¹)
b. The sum of a series is defined as the limit of the sequence of partial sums is converges.
c. The true statement are "The series converges. and The series is a geometric series." (option B and C).
a. To find the general formula for the sum of the first n terms, we need to add the first n terms of the series. Thus, we have:
Sₙ = 2e⁰ + 2e⁻¹ + 2e⁻² + ... + 2e⁻ⁿ
We can see that this is a geometric series with a first term a=2 and a common ratio r=e⁻¹. Therefore, we can use the formula for the sum of a geometric series to find the general formula for Sₙ:
Sₙ = a(1 - rⁿ)/(1 - r)
Substituting a=2 and r=e⁻¹, we get:
Sₙ = 2(1 - e⁻ⁿ)/(1 - e⁻¹)
the limit of the sequence of partial sums is zero, the series converges.
b. To determine whether the series converges or diverges, we can take the limit of the sequence of partial sums as n approaches infinity. Thus, we have:
∑n=0∞2e−n=limn→∞ S_n= limn→∞ 2(1 - e⁻ⁿ)/(1 - e⁻¹)
To evaluate this limit, we can use L'Hopital's rule, which states that if we have an indeterminate form of the type 0/0 or infinity/infinity, we can take the derivative of the numerator and the denominator until the form is no longer indeterminate. Applying L'Hopital's rule, we get:
lim n→∞ 2(1 - e⁻ⁿ)/(1 - e⁻¹) = limn→∞ 2e⁻ⁿ/(e⁻¹) = 0
c. We can now identify whether the series is a telescoping series, a geometric series, or a p-series.
The series is a geometric series, as we already saw in part (a).
Therefore, the correct answers are (B) and (C).
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A "flush" in poker is having all the same suit of cards in your poker hand. Remember that a standard deck of cards has 52 cards of four suits: clubs, diamonds, hearts, and spades. Each suit has 13 cards in it.
What is the probability that a player is dealt five cards resulting in a flush that is not the suit of hearts or clubs?
a small coffee shop owner wants to know which brand of coffee her customers prefer
population or sample explain?
If the small "coffee-shop" owner is trying to determine the preference of her customers by conducting a survey among a group of customers who visit the shop during a specific time frame, then this group would be a sample rather than a population.
A "Sample" is defined as a subset of the population that is selected to represent the entire population. In this case, the owner is trying to determine the preference of her customers by surveying a specific group of customers.
So, this group of customers is a sample of the population of all customers who visit the coffee shop.
To obtain meaningful results from the survey, the sample should be selected randomly and should be representative of the population. The results obtained from the sample could then be used to make inferences about the preferences of the entire population of customers who visit the coffee shop.
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The given question is incomplete, the complete question is
A small coffee shop owner wants to know which brand of coffee her customers prefer.
Is the data considered a "population" or "sample", Explain?
What is a good estimate for 485% of 20? Explain
Answer:
100
Step-by-step explanation:
We can estimate 485% as 500%. We know that 500% is equal to 5.
Therefore,
20 × 500%
= 20 × 5
= 100
Solve for x. Round to the nearest hundredth. 10 37
3.96 cm is the value of the side x.
From the general formula of the sine rule:
[tex]\frac{sin\ a}{A} =\frac{sin\ b}{B} =\frac{sin\ c}{C}[/tex]
Where A, B, and C are the sides of the triangle and a, b, and c are the corresponding angles of the triangle.
In the given problem,
a= 90 degrees
A = 10 cm
b= 37 degrees
B = unknown
c =180 -90-37 = 53 (Sum of all inner angles of a triangle is 180 degrees)
C = x
Thus,
[tex]\frac{sin\ 90}{10} =\frac{sin\ 53}{x}[/tex]
x = 10 sin53°
x = 10*0.3959
x = 3.96
therefore, the value of the side x is 3.96 cm.
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3.96 cm is the value of the side x.
From the general formula of the sine rule:
[tex]\frac{sin\ a}{A} =\frac{sin\ b}{B} =\frac{sin\ c}{C}[/tex]
Where A, B, and C are the sides of the triangle and a, b, and c are the corresponding angles of the triangle.
In the given problem,
a= 90 degrees
A = 10 cm
b= 37 degrees
B = unknown
c =180 -90-37 = 53 (Sum of all inner angles of a triangle is 180 degrees)
C = x
Thus,
[tex]\frac{sin\ 90}{10} =\frac{sin\ 53}{x}[/tex]
x = 10 sin53°
x = 10*0.3959
x = 3.96
therefore, the value of the side x is 3.96 cm.
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I need help understanding how to solve this.
Answer:
The common ratio of this geometric sequence is -1/2, so we have
a(7) = 16 × -1/2 = -8, a(8) = -8 × -1/2 = 4.
Dividing by -1/2 is the same as multiplying by -2. Working backwards, we have:
a(5) = -2 × 16 = -32
a(4) = -2 × -32 = 64
a(3) = -2 × 64 = -128
a(2) = -2 × -128 = 256
a(1) = -2 × 256 = -512
PLEASE ANSWER AND EXPLAIN WHY THE ANSWER IS CORRECT!
Answer:
see below
Step-by-step explanation:
A box plot—displays the five-number summary of a set of data.
The five-number summary is the
minimum, first quartile, median, third quartile, and maximum.
In a box plot, we draw a box from the first quartile to the third quartile.
A vertical line goes through the box at the median.
So the median of this set of data = 7
only C & D show a median of 7.
Then, Just like the median divides the data into half so that 50% of the measurement lies below the median and 50% lies above it, the quartile breaks down the data into quarters so that 25% of the measurements are less than the lower quartile, 50% are less than the median, and 75% are less than the upper quartile.
D is correct
sin2x=
please help!!
Answer:
A
Step-by-step explanation:
It is a double angle identity.
sin2x = 2sinxcosx
Answer: 2sinxcosx
Step-by-step explanation:
If Thursday seen 400 customers and Friday had a 1/5 increase from Thursday what is the number of people on Friday?
Answer:
There were 480 customers on Friday.
To calculate the increase from Thursday to Friday, we can use the following formula:
```
Increase = (percent increase / 100) * starting value
```
In this case, the percent increase is 1/5, and the starting value is 400 customers. So, the increase is:
```
Increase = (1/5 / 100) * 400 = 8
```
This means that there were 8 more customers on Friday than there were on Thursday. So, the total number of customers on Friday is:
```
Total = Starting value + Increase
= 400 + 8
= 480
```
Step-by-step explanation:
help me hurry up 8th grade math
The standard form of each of the numbers is given as follows:
a) 2.35 x 10^-3 = 0.00235.
b) 2.35 x 10³ = 2350.
What is scientific notation?A number in scientific notation is given by the notation presented as follows:
[tex]a \times 10^b[/tex]
With the base being [tex]a \in [1, 10)[/tex], meaning that it can assume values from 1 to 10, with an open interval at 10 meaning that for 10 the number is written as 10 = 1 x 10¹, meaning that the base is 1, justifying the open interval at 10.
For item a, to obtain the standard form of the number, we must move the decimal points three places to the left, hence:
2.35 x 10^-3 = 0.00235.
For item b, to obtain the standard form of the number, we must move the decimal points three places to the right, hence:
2.35 x 10³ = 2350.
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Given a random sample: X= 75, Sx = 24, and n = 36. Construct a 95% confidence interval and
estimate the population mean, m.
What would be the answer to this?
we estimate the population mean m to be 75.
What is confidence interval?
A confidence interval (CI) for an unknown parameter in frequentist statistics is a range of estimations. The most popular confidence level is 95%, but other levels, such 90% or 99%, are occasionally used for computing confidence intervals. The fraction of related CIs over the long run that actually contain the parameter's true value is what is meant by the confidence level. The degree of confidence, sample size, and sample variability are all factors that might affect the width of the CI. A larger sample would result in a narrower confidence interval if all other factors remained constant. A wider confidence interval would also be required by a higher confidence level and would be produced by a sample with more variability.
Since we want a 95% confidence interval, α = 0.05/2 = 0.025 and we need to find the critical value from the t-distribution with (36-1) = 35 degrees of freedom. Using a t-table or calculator, we find that t0.025,35 = 2.032.
Now, plugging in the values we have:
CI = 75 ± (2.032 * (24/√36))
CI = 75 ± (2.032 * 4)
CI = 75 ± 8.128
So the 95% confidence interval for the population mean m is (66.872, 83.128). This means we are 95% confident that the true population mean falls within this interval.
As for the estimated population mean, we can simply take the sample mean, which is X = 75.
Therefore, we estimate the population mean m to be 75.
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PLEASE SHOW YOUR WORK ON HOW TO SOLVE THIS PROBLEM!! BEST ANSWER ILL GET MARKED BRAINIEST!
4x+5/x+7
Answer:
x = 2.4
Step-by-step explanation:
4x + 5 / x + 7
combine like terms
X + 4x = 5x
5 + 7= 12
12/ 5x
Divide
12 /5= 2.4
X= 2.4
The number of employees for a certain company has been decreasing each year by 8%. If the company cumenty has 720 employees and this rate continues, find the number of employees in 10 years.
The number of employees in 10 years will be approximately
Round to the nearest whole number as needed)
The number of employees for a certain company has been decreasing each year by 8%. If the company cumenty has 720 employees and this rate continues, find the number of employees in 10 years.
The number of employees in 10 years will be approximately
Round to the nearest whole number as needed)
The cost of book B is $15.00 more than three times the cost of book A. if the cost of books A and B together is $75.00, what is the cost of book A ?
Step-by-step explanation:
we can substitute book B as B
we can substitute book A as A
using the information above we can create an eqaution
we know B is $15.00 more than 3 times the cost of A
B = 3A + 15.00
we know the sum of the books is $75.00
A + B = 75.00
substitute B with eqaution 1 we will get
A + 3A + 15.00 = 75.00
4A + 15.00 = 75.00
- 15.00 -15.00
4A= 60.00
A = 15.00
which means book A is $15.00
What is the surface area?
20 cm
16 cm
20 cm
24 cm
32 cm
The calculated value of the surface area of the shape is 192 square cm
What is the surface area?From the question, we have the following parameters that can be used in our computation:
The triangle (see attachment)
The surface area is calculated as
Area = 1/2 * Base * Height
Substitute the known values in the above equation, so, we have the following representation
Area = 1/2 * 24 * 16
Evaluate
Area = 192
Hence, the surface area is 192 sq cm
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If mum was 23 seven years ago how old would she be in seven years
Answer:
the answer would be 30 because you would be adding 7 years by 23 and since you said years ago i think you meant by years old
you're welcome if this help :)
Step-by-step explanation:
If mum was 23 seven years ago, that means she is currently 23 + 7 = 30 years old.
In seven years, she will be 30 + 7 = 37 years old.
URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
Answer:
-1/2
Step-by-step explanation:
The information provided about the line is that the line passes through the points (2, 2) and (6, 0)
Therefore, the first step consists in computing the slope. The formula for the slope is:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
Now, by plugging the corresponding numbers is , we get that the slope is:
[tex]m=\frac{y_2-y_1}{x_2-x_1}=\frac{0-2}{6-2} =-\frac{1}{2}[/tex]
So then, we find that the slope is [tex]m=-\frac{1}{2}[/tex] and that the line passes through the point [tex](2,2)[/tex].
Conclusion: Based on the data provided, we conclude that the slope of the line is [tex]m=-\frac{1}{2}[/tex].
Simplify the expression
The simplified expression is (z -3)/z - 5. Option C
How to simply the expressionFrom the information given, we have to simply the expressions by solving the quadratic equation;
From the information given, we have that;
z² -5zx + 6
Find the pair factors and substitute the values
z² - 2z - 3z + 6
Group in pairs, we have;
z(z - 2) - 3(z - 2)
For the denominator, we have;
z² - 7x + 10
Find the factors
z² - 5z - 2z + 10
Group in pairs, we have;
z(z - 5) - 2(z - 5)
Then, we have the simplified form;
(z -3)/z - 5
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21 cm 1.2.1 Calculate the perimeter of the A4 paper. Explain the meaning of the given scale. 1.2.2 1.2.3 What type of scale is shown on the drawing 1+1
a new crew of painters takes two times as long to paint a small apartment as the experienced crew together both crews can paint the apartment in 6 hours how many hours does it take the experienced crew to paint the apartment
In the equation , it take 2 hours for the experienced crew to paint the apartment.
What is equation?
The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.
Here let us take x as time taken by new crew of painters apartment and y as time taken by experienced crew of painters apartment .
Now a new crew of painters takes two times as long to paint a small apartment as the experienced crew then,
x = 2y ----> 1
both crews can paint the apartment in 6 hours then,
=> x+y = 6
Now put equation 1 into x+y=6 then,
=> 2y+y=6
=> 3y = 6
=> y = 6/3 = 2 hours.
Hence it take 2 hours for the experienced crew to paint the apartment.
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