[NEED HELP!]
Frederick reduced triangle A
proportionally.

He made each side 23
times as long.

If a is a positive integer and if the unit's digit of a2 is 9 and (a+1)2 is 4, then the unit's digit of (a+2)2 is 1.

We are given that a is a positive integer, and we need to find the unit's digit of (a+2)². To solve this problem, let's first analyze the information provided:
1. The unit's digit of a² is 9.
2. The unit's digit of (a+1)² is 4.
From the first piece of information, we can conclude that the unit's digit a must be either 3 or 7, as 3² = 9 and 7² = 49 (the unit's digit is 9).
Now, let's check the second piece of information. If the unit's digit of a is 3, then the unit's digit of (a+1) would be 4. Since 4² = 16 (unit's digit is 6), this doesn't match the given condition that the unit's digit of (a+1)² is 4.
So, the unit's digit must be 7. In this case, the unit's digit of (a+1) is 8. Since 8² = 64 (unit's digit is 4), this matches the given condition.
Now that we know the unit's digit of a is 7, let's find the unit's digit of (a+2)². If the unit's digit of a is 7, then the unit's digit of (a+2) is 9. Since 9² = 81 (unit's digit is 1), the unit's digit of (a+2)² is 1.
Therefore, the correct answer is:
A) 1

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The volume of the prism is 1500 m³.

For calculating the volume of the given prism, we need to calculate the area of the top triangle and the area of the bottom triangle.

Base of the top triangle, b = (7 + 9) / 2 = 8 m

Height of the top triangle, h = 10 m

Area of the top triangle, A = 1/2bh

A = 1/2 x 8 x 10

A = 40 m²

Area of bottom triangle, A' = (1/2) x bh

A' = (1/2) x 12 x 5

A' = 30 m²

Volume of prism, V = height x [A + A' + (2 x Average area of front and back rectangles)]

V = 10 x [(40 + 30 + (2 x (1/2) x 8 x 10)]

V = 1500 m³

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Answer:i think the anwser is 6

Step-by-step explanation:

The area of the surface defined by z = xy and x2 + y2 ≤ 22 would be, Area = ∬ sqrt(1 + r^2) * r dr dθ, with limits 0 ≤ r ≤ sqrt(2) and 0 ≤ θ ≤ 2π.Evaluate the integral to get the area of the surface.

To find the area of the surface defined by z = xy and x^2 + y^2 ≤ 2, we need to use a double integral over the region bounded by the inequality x^2 + y^2 ≤ 2.

First, we should rewrite the inequality in polar coordinates: x^2 + y^2 ≤ 2 becomes r^2 ≤ 2, where r is the radial distance and θ is the angle. This means 0 ≤ r ≤ sqrt(2) and 0 ≤ θ ≤ 2π.

Next, we find the Jacobian for the polar coordinates, which is |J(r,θ)| = r.

Now, we need to compute the magnitude of the gradient of z = xy in terms of polar coordinates. The gradient of z is given by the partial derivatives:

∂z/∂x = y and ∂z/∂y = x

In polar coordinates, x = r*cos(θ) and y = r*sin(θ). So, we have:

∂z/∂r = cos(θ)*∂z/∂x + sin(θ)*∂z/∂y = r*cos^2(θ) + r*sin^2(θ) = r

Now, we use the double integral to find the surface area:

Area = ∬ sqrt(1 + (∂z/∂r)^2) * |J(r,θ)| dr dθ

Area = ∬ sqrt(1 + r^2) * r dr dθ, with limits 0 ≤ r ≤ sqrt(2) and 0 ≤ θ ≤ 2π.

Evaluate the integral to get the area of the surface.

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Out of the 500 teenagers sampled at random, the table presents their preferences in terms of favorite movie genres. To estimate the number of teenagers out of a population of 3,000 who prefer action movies, we can use the proportion of action movie fans from the sample.

Let's say the table shows that "x" out of the 500 sampled teenagers prefer action movies. To find the proportion of action movie fans in the sample, we divide the number of action movie fans by the total number of teenagers in the sample:

Proportion of action movie fans = (x / 500)

Now, we can use this proportion to estimate the number of teenagers who prefer action movies in the entire population of 3,000 teenagers. To do this, multiply the proportion of action movie fans by the total population:

[tex]Estimated action movie fans = Proportion of action movie fans * Total population[/tex]

Estimated action movie fans = (x / 500) * 3,000

By calculating this value, we can estimate the number of teenagers in the population of 3,000 who will prefer action movies based on the results of the random sample.

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The correct set of image points for trapezoid W’X’Y’Z’ for 180 degrees rotation is (a) W’(4, –2), X’(3, –4), Y’(1, –4), Z’(0, –2)

From the question, we have the following parameters that can be used in our computation:

W(-4, 2), X(-3, 4), Y(-1, 4), Z(0, 2)

Rule: 180 degrees rotation

The rule of 180 degrees rotation is

(x, y) = (-x, -y)

Substitute the known values in the above equation, so, we have the following representation

W’(4, –2), X’(3, –4), Y’(1, –4), Z’(0, –2)

Hence, the image = W’(4, –2), X’(3, –4), Y’(1, –4), Z’(0, –2)

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The value of upper quartile of the box plot is, 350.

We have to given that;

the Creekview History Museum kept track of how many people visited the museum each day last month.

Now, We know that;

The value of upper quartile of the box plot shown in right side of box.

Hence, By given box plot;

The value of upper quartile of the box plot is,

⇒ 350.

Thus, The value of upper quartile of the box plot is, 350.

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Answer:

Step-by-step explanation:

/,

The ratio 8:73 represents the ratio of 6th grade football players to total athletes. The Option B is correct.

We must add up the number of football players in each grade to get the ratio/

Data:

6th grade: 8 football players

7th grade: 15 football players

8th grade: 10 football players

The total number of football players is:

=  8 + 15 + 10

= 33.

The total number of athletes is:

6th grade: 2 (basketball) + 1 (baseball) + 7 (soccer) + 8 (football) = 18

7th grade: 4 (basketball) + 6 (baseball) + 4 (soccer) + 15 (football) = 29

8th grade: 7 (basketball) + 5 (baseball) + 4 (soccer) + 10 (football) = 26

The total number of athletes is:

= 18 + 29 + 26

= 73.

Therefore, the ratio of 6th grade football players to total athletes is 8:73.

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The probability that z ≥ -2.12 can be found using a standard normal distribution table or calculator. The answer is approximately 0.9830.  2. For a sample of 49 elements with a sample mean of 56 and a sample standard deviation of 14, the standard error of the mean is: b. 2

The standard error of the mean can be calculated using the formula:

[tex]standard error = sample standard deviation / square root of sample size[/tex]

In this case, the sample standard deviation is 14 and the sample size is 49. Therefore, the standard error of the mean is:

standard error = 14 / √49
standard error = 14 / 7
standard error = 2

So the answer is (b) 2.

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The intensity of light will be  0.308%

We know that the intensity of the light is given by the formula:

I(d) = 100d⁻²

We want to find the intensity of the light 18 cm from the source, so we just need to evaluate our formula in d = 18, we will get:

I(18) =  100*18⁻² = 0.308

That is the intensity of light at 18cm from the source.

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If a researcher finds a small difference in average test scores between a large sample (over 700) of experimental participants and a large sample (same size) of control participants.

It is very likely that the difference is statistically significant but does not have a high degree of meaningfulness. This is because with such a large sample size, even small differences can be statistically significant, but the degree of meaningfulness depends on the magnitude of the difference and the practical significance of the findings. The control group helps to establish a baseline for comparison, but it does not necessarily affect the statistical significance of the results.

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Answer: 44%

Step-by-step explanation:

Let us assume there were 100 students.

Now, 26% means 26 students have chosen biology, and 18% means 18 students have chosen botany.

Now total number of students who have chosen biology or botany = 44

P(the student has chosen biology or botany as subject for project) = 44/100

[tex]\cfrac{q}{10}=\cfrac{98}{49}\implies \cfrac{q}{10}=2\implies q=20[/tex]

The translational angular momentum of the space junk about location D just before the collision can be found by plugging the values of r_perp and p.

To calculate the translational angular momentum of the space junk about location D, we need to consider its linear momentum and the perpendicular distance from location D to the line of motion.

Step 1: Identify the linear momentum of the space junk
Linear momentum (p) is the product of mass (m) and velocity (v). Assuming we know the mass and velocity of the space junk, we can find its linear momentum:

p = m * v

Step 2: Determine the perpendicular distance (r_perp) from location D to the line of motion
As mentioned, r_perp remains the same at locations A, B, and just before reaching C.

Step 3: Calculate the translational angular momentum (L) about location D
Translational angular momentum is given by the formula:

L = r_perp * p

Since r_perp and p remain constant at locations A, B, and just before reaching C, the translational angular momentum of the space junk about location D will be the same at all these locations.

So, the translational angular momentum of the space junk about location D just before the collision can be found by plugging the values of r_perp and p into the formula above.

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Answer:

9,000

Step-by-step explanation:

Answer: 9,000

Step-by-step explanation:

When the next number over is 5 or above, you round up. This would give you 9,000. If you needed to round to the nearest hundred it would be 8,600 for example.

Answer:

the Riemann Sum for $f(x)=2x^2$ with four equal subintervals using right-hand endpoints as the sample points is $\frac{15}{2}$.

Step-by-step explanation:

To evaluate the Riemann Sum for the function $f(x)=2x^2$ with four equal subintervals using right-hand endpoints as the sample points, we first need to determine the width of each subinterval. Since we have four subintervals to cover the interval $[0, 2]$, each subinterval has a width of $\Delta x = \frac{2-0}{4} = \frac{1}{2}$.

Next, we need to choose a sample point from each subinterval to evaluate the function. Since we are using right-hand endpoints as the sample points, we choose the endpoint of each subinterval as the sample point. The four subintervals are:

$[0, \frac{1}{2}]$, with sample point $x_1 = \frac{1}{2}$

$[\frac{1}{2}, 1]$, with sample point $x_2 = 1$

$[1, \frac{3}{2}]$, with sample point $x_3 = \frac{3}{2}$

$[\frac{3}{2}, 2]$, with sample point $x_4 = 2$

The Riemann Sum is then given by:

∑i=14f(xi)Δx=f(x1)Δx+f(x2)Δx+f(x3)Δx+f(x4)Δx=2(12)2⋅12+2(1)2⋅12+2(32)2⋅12+2(2)2⋅12=12+2+92+4=152i=1∑4​f(xi​)Δx​=f(x1​)Δx+f(x2​)Δx+f(x3​)Δx+f(x4​)Δx=2(21​)2⋅21​+2(1)2⋅21​+2(23​)2⋅21​+2(2)2⋅21​=21​+2+29​+4=215​​

Therefore, the Riemann Sum for $f(x)=2x^2$ with four equal subintervals using right-hand endpoints as the sample points is $\frac{15}{2}$.

The Riemann Sum is 15/2 or 7.5.

To evaluate the Riemann Sum for the function f(x) = 2x^2 on the interval [0, 2] using 4 equal subintervals and right-hand endpoints, follow these steps:

1. Determine the width of each subinterval:
  Δx = (b - a) / n = (2 - 0) / 4 = 0.5

2. Identify the right-hand endpoints of each subinterval:
  x1 = 0.5, x2 = 1, x3 = 1.5, x4 = 2

3. Evaluate the function at each right-hand endpoint:
  f(x1) = 2(0.5)^2 = 0.5
  f(x2) = 2(1)^2 = 2
  f(x3) = 2(1.5)^2 = 4.5
  f(x4) = 2(2)^2 = 8

4. Calculate the Riemann Sum using these values:
  Riemann Sum = Δx * (f(x1) + f(x2) + f(x3) + f(x4))
  Riemann Sum = 0.5 * (0.5 + 2 + 4.5 + 8)
  Riemann Sum = 0.5 * (15)
  Riemann Sum = 7.5

The Riemann Sum for the given function using 4 equal subintervals and right-hand endpoints is 7.5, which is not among the provided options. However, the closest answer choice would be 15/2 or 7.5.

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Answer:

D. 12 units

Step-by-step explanation:

For a point to be translated x units to the left, we must subtract x from the original point, so the x coordinate for M' is -4 as 4 - 8 = -4

For a point to be translated x units down, we must subtract x from the original point, so the y coordinate for M' is -3 as 6 - 9 = -3

Thus, the coordinates for M' is (-4, -3)

The formula for distance, d, between two points is

[tex]d=\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }[/tex], where (x1, y1) is one point and (x2, y2) is another point.

If we allow M (4, 6) to be our x1 and y1 point and M' (-4, -3) to be our x2 and y2 point, we can find the distance between the two points:

[tex]d=\sqrt{(4-(-4))^2+(6-(-3))^2}\\ d=\sqrt{(4+4)^2+(6+3)^2}\\ d=\sqrt{(8)^2+(9)^2}\\ d=\sqrt{64+81}\\ d=\sqrt{145}\\ d=12.04159458[/tex]

The coordinate points E=(3, -1) and K=(9, -9) are separated by a distance of 10 units.

The formula for calculating the distance between two points is expressed as:

D = √(x₂-x₁)²-(y₂-y₁)²

Given the following coordinates  E=(3, -1) and K= (9, -9)

Substitute the coordinates into the formula to have:

D = √(3-9)²-(-1-(-9))²

D= √(-6)²-(8)²

D = √36 + 64

D = √100

D = 10 units

Hence the distance between the points E=(3, -1) and K= (9, -9) is 10 units.

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The appropriate test to use in this situation is a paired t-test. This test is used to determine if there is a significant difference between two related samples, in this case, the same individuals at two different time points.

In this scenario, a paired t-test is the most suitable test because it is used to analyze paired data, where the same individuals are measured or tested at two different time points. The paired t-test takes into account the correlation between the two measurements within each individual and compares the mean difference between the paired observations to determine if there is a statistically significant change over time.

It is commonly used in longitudinal studies, clinical trials with repeated measures, or before-and-after intervention studies, where the focus is on comparing the same individuals' outcomes over time rather than comparing different groups or populations.

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The graph of the system of linear equation is attached below

The graph of a linear equation is a line. Each point on the line is a solution to the equation. For a system of two equations, we will graph two lines. Then we can see all the points that are solutions to each equation. And, by finding what the lines have in common, we’ll find the solution to the system.

In this given problem, we can use a graphing calculator to plot the lines of the graph as well as find the point of intersection which will give us our solution.

The equations given are;

5x + 2y = -3 ...eq(i)

8x - 6y = -14 ...eq(ii)

Plotting this in a graphing calculator;

We can see that the solution to this graph which is the point of intersection is at (1, 1)

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The least number of socks you need to pick is 10 red socks, 10 blue socks, and 10 white socks to ensure you have a matching pair. The least number of socks that can be taken from the drawer is one.

Follow these steps:
1. Pick one sock from the drawer (it could be any color, let's say red).
2. Pick a second sock from the drawer (if it's red, you have a matching pair; if not, let's say it's blue).
3. If you don't have a matching pair yet, pick a third sock from the drawer (now, it's either red, blue, or white, and you'll have a matching pair for sure).
So, the least number of socks you need to pick to ensure a matching pair is 3.

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The required solution (x, y) = (3, -2) satisfies both equations, and it is the correct solution.

To solve the linear equation -x + 3y = -9 by substitution using the equation y = -2x + 4, we can substitute y in the second equation with -2x + 4 from the first equation, as follows:
-x + 3(-2x + 4) = -9
x - 6x + 12 = -9
-7x = -21
x = 3

Now, we can use the value of x to find the value of y from the first equation,
y = -2x + 4:
y = -2(3) + 4
y = -2

So the solution to the system of equations is (x, y) = (3, -2).

To check the solution, we can substitute the values of x and y in both equations and verify that they are true:
y = -2x + 4 becomes -2 = -2(3) + 4, which is true.
-x + 3y = -9 becomes -3 + 3(-2) = -9, which is also true.

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The value of z in the polynomial function f(x) = x²- 9x + z is 0.

The vertex of a parabola in form f(x) = a(x-h)² + k is (h,k), and the x-coordinate of the vertex is given by -b/2a for a quadratic function in form f(x) = ax² + bx + c.

From the given information, we know that the vertex of f(x) is (4.5,-2.25), so we can write:

f(x) = a(x-4.5)² - 2.25

We also know that f(x) has a zero at (3,0), so we can write:

0 = a(3-4.5)² - 2.25

0 = a(2.25) - 2.25

a = 1

Substitute this value of a = 1 into the equation for f(x),

f(x) = (x-4.5)^2 - 2.25 + z

We know that f(x) has a zero at x=3, so we can substitute x=3 and set f(3) equal to zero:

0 = (3-4.5)² - 2.25 + z

0 = 2.25 - 2.25 + z

z = 0

Therefore, the value of z in the polynomial function is 0.

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Bread has a final price of RD$ 7.

In this problem we know the current price of bread and the rise percentage, from which we have to compute the final price of the product in mention, whose expression is described below:

C' = C × (1 + r / 100)

Donde:

If we know that C = 5 y r = 40, then the final price of bread is:

C' = 5 · (1 + 40 / 100)

C' = 7

The final price of bread is RD$ 7.

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1. The interval contains the fewest data values is 4-5.

2. The total number of students are 20.

3. The percent of the students read fewer than six magazines is 85%.

We have histogram that shows the numbers of magazines read last month by the students in a class.

1. The interval contains the fewest data values is 4-5 as it has 0 data.

2. The total number of students are

= 2 + 15 + 0 + 3

=20

3. The percent of the students read fewer than six magazines

= 17/20 x 100

= 85%

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All the solutions of the logarithmic function,

a. log₃(27) = 3 because 3³ = 27.

b.  log₂(2,048) = 11 because 2¹¹ = 2,048.

c. log₃(1/81) = -4 because 3⁻⁴ = 1/81.

d.  log₂(1) = 0 because 2⁰ = 1.

e.  log₁₀(1/10) = -1 because 10⁻¹ = 1/10.

f. log₆(6) = 1 because 6¹ = 6.

g. log₃(3k) = 1 + log₃k

(a) The expression is log₃ (27),

Now, the exponent to which 3 must be raised to obtain 27.

Since 3³ = 27

log₃ (27) = log₃ (3³)

              = 3 log₃3

              = 3

log₃(27) = 3 because 3³ = 27.

(b) Similarly, to find log_2(2,048), we need to determine the exponent to which 2 must be raised to obtain 2,048.

Since 2¹¹ = 2,048

Here, we have;

log₂(2,048) = log₂ (2¹¹)

                   = 11 log₂ (2)

                   = 11

log₂(2,048) = 11 because 2¹¹ = 2,048.

(c) For log₃(1/81), we need to determine the exponent to which 3 must be raised to obtain 1/81.

Since 3⁻⁴ = 1/81

So, we have

log₃(1/81) = -4 because 3⁻⁴ = 1/81.

(d) In the case of log₂(1), we need to determine the exponent to which 2 must be raised to obtain 1.

Since any number raised to the power of 0 equals 1, we have;

log₂(1) = 0 because 2⁰ = 1.

(e) For log₁₀(1/10), we need to determine the exponent to which 10 must be raised to obtain 1/10.

Since 10⁻¹ = 1/10

Hence, we have;

log₁₀(1/10) = -1 because 10⁻¹ = 1/10.

(f) When calculating log₆(6), we need to determine the exponent to which 6 must be raised to obtain 6.

Since any number raised to the power of 1 is equal to itself, we have

log₆(6) = 1 because 6¹ = 6.

(g) Lastly, for log₃(3k)

log₃(3k) = log₃3 + log₃k

             = 1 + log₃k

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The logarithm method is used to determine the number of times to multiply the base number to obtain another number. The given expressions convert into respective powers of the base to give the final exact values. The values obtained depict the fundamental property of logarithms.

The logarithm function is a method of determining how many times one number must be multiplied by itself to reach another number. It is usually denoted as logb(x), where 'b' is the base, 'x' is the result of the multiplication, and the result of the log function is the number of times we need to multiply.

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A curvilinear association is a non-linear relationship between two variables, but a correlation coefficient of zero (or close to zero) does not guarantee a curvilinear relationship, as it only indicates the absence of a linear relationship.

A curvilinear association is a relationship between two variables where the pattern of their association is not a straight line. However, the correlation coefficient being zero (or close to zero) indicates no linear relationship between the variables, but it does not necessarily imply a curvilinear association. A curvilinear association can have a non-zero correlation coefficient, depending on the nature of the curve.
No, that statement is not entirely accurate. A curvilinear association refers to a relationship between two variables that is not linear, meaning it cannot be described by a straight line. However, the correlation coefficient can still be calculated for a curvilinear relationship, and it may or may not be close to zero. In fact, there are different types of curvilinear relationships, some of which can have a strong correlation coefficient.

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The equations that models a growing line include the following:

B. 3x − 2y + 3 = 0

D. −5x + 3y + 9 = 0

In Mathematics, a steeper slope simply means that the slope of a line is bigger than the slope of another line. This ultimately implies that, a graph with a steeper slope has a greater (faster) rate of change in comparison with another graph.

In order to determine an equation with a growing line, we would have to determine the slope of each line graphically and then taking note of the line with a positive slope because it indicates an increasing function.

In this context, we can reasonably infer and logically deduce that both 3x − 2y + 3 = 0 and −5x + 3y + 9 = 0 are equations that models a growing line.

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Complete Question:

Which of the following equations models a growing line?

A. 2x+4y+12=0

B. 3x−2y+3=0

C. −x−3y−12=0

D. −5x+3y+9=0

After 25 years, Bill earned $7,323.68 more interest than Jim.

The parameters needed to calculate the balances of each account are given as follows:

Using simple interest, Jim's balance is given as follows:

J(25) = 15000(1 + 0.035 x 25)

J(25) = $28,125.

Hence he earned $13,125 in interest.

Using compound interest, Bill's balance is given as follows:

B(25) = 15000(1.035)^25

B(25) = $35,448.68.

Hence he earned $20,448.68 in interest.

The difference is given as follows:

20448.68 - 13125 = $7,323.68

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Between clock skew and clock jitter, skew is preferred because it is more predictable and can sometimes increase max frequency. This makes it easier to manage in electronic systems and can provide benefits in certain scenarios.

Jitter is preferred because it is predictable. Clock jitter refers to the variability of the clock signal and can be predicted and compensated for. On the other hand, clock skew refers to the difference in arrival time of the clock signal at different points in the circuit and can sometimes increase maximum frequency. However, skew is preferred because it is more predictable and can be compensated for, while jitter is preferred because it is unpredictable and can't be compensated for. Therefore, in general, jitter is considered more preferable than skew.

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