1. Why does the distance formula contain both x and y
coordinates? 2. Can you use the distance formula for horizontal and
vertical segments? 3. If you had horizontal/vertical segments,
which formula w

Answers

Answer 1

Explanation of why the distance formula contains both x and y coordinates:The distance formula is a formula used to calculate the distance between two points, given their coordinates on a Cartesian plane. It contains both x and y coordinates because the distance between two points is the length of the straight line connecting them, and this length can be determined by using the Pythagorean theorem. In order to use the Pythagorean theorem, we need to know the lengths of the sides of a right triangle, which are represented by the x and y coordinates of the two points. Therefore, the distance formula contains both x and y coordinates.

Can you use the distance formula for horizontal and vertical segments?Yes, you can use the distance formula for horizontal and vertical segments. In fact, the distance formula is commonly used to find the distance between two points on a horizontal or vertical line. When the two points have the same y-coordinate, they are on a horizontal line, and when they have the same x-coordinate, they are on a vertical line. In these cases, the distance between the two points is simply the absolute value of the difference between their x-coordinates or y-coordinates, respectively.

If you had horizontal/vertical segments, you would not need to use the distance formula. Instead, you could simply calculate the distance between the two points by finding the absolute value of the difference between their x-coordinates or y-coordinates, depending on whether they are on a horizontal or vertical line. However, if the two points are not on a horizontal or vertical line, you would need to use the distance formula to calculate the distance between them.

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Related Questions

Speedometer readings for a vehicle (in motion) at 15 -second intervals are given in the table below. Estimate the distance traveled by the vehicle during this 90 -second period using six rectangles and left endpoints. Repeat this calculation twice more, using right endpoints and then midpoints.
t(sec) 0 15 30 45 60 75 90
v(ft/s) 0 10 35 62 79 76 56

Answers

The distance traveled by the vehicle is about 3945 feet using left endpoints, about 3906 feet using right endpoints, and about 3925 feet using midpoints. The method for approximating the distance traveled by the vehicle is the Riemann sum.

The Riemann Sum is a method for approximating the area under a curve using rectangles. The area under the curve is approximated by dividing it into smaller sections and calculating the area of each section using rectangles. The sum of the areas of all the sections is then used to estimate the area under the curve. Therefore, the distance traveled by the vehicle is approximated by dividing the time interval into smaller intervals and calculating the distance traveled during each interval using the given speedometer readings. This is done by approximating the area under the curve of the speedometer readings using rectangles.The distance traveled by the vehicle is approximated by dividing the time interval into six 15-second intervals and using left endpoints, right endpoints, or midpoints of each interval. The distance traveled by the vehicle is calculated by summing up the distance traveled during each interval. Using left endpoints, the distance traveled by the vehicle is approximately:$$\begin{aligned}Distance&\approx (15\ ft/s)\times 15\ sec+(35\ ft/s)\times 15\ sec+(62\ ft/s)\times 15\ sec\\&+(79\ ft/s)\times 15\ sec+(76\ ft/s)\times 15\ sec+(56\ ft/s)\times 15\ sec\\&=(225+525+930+1185+1140+840)\ ft\\&=4845\ ft.\end{aligned}$$Using right endpoints, the distance traveled by the vehicle is approximately:$$\begin{aligned}Distance&\approx (10\ ft/s)\times 15\ sec+(35\ ft/s)\times 15\ sec+(62\ ft/s)\times 15\ sec\\&+(79\ ft/s)\times 15\ sec+(76\ ft/s)\times 15\ sec+(56\ ft/s)\times 15\ sec\\&=(150+525+930+1185+1140+840)\ ft\\&=4770\ ft.\end{aligned}$$Using midpoints, the distance traveled by the vehicle is approximately:$$\begin{aligned}Distance&\approx (7.5\ ft/s)\times 15\ sec+(22.5\ ft/s)\times 15\ sec+(48.5\ ft/s)\times 15\ sec\\&+(67\ ft/s)\times 15\ sec+(75.5\ ft/s)\times 15\ sec+(64\ ft/s)\times 15\ sec\\&=(112.5+337.5+727.5+1001.25+1132.5+960)\ ft\\&=3925.75\ ft.\end{aligned}$$Hence, the distance traveled by the vehicle is about 3945 feet using left endpoints, about 3906 feet using right endpoints, and about 3925 feet using midpoints. The method for approximating the distance traveled by the vehicle is the Riemann sum.

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Elabora un cartel donde expreses valores que fomentan la armonía unión confianza y la solidaridad en el hogar

Answers

Título: Valores para fomentar la armonía, unión, confianza y solidaridad en el hogar

[Imagen ilustrativa de una familia feliz y unida]

1. Armonía: Cultivemos un ambiente pacífico y respetuoso donde todos puedan convivir en armonía, valorando las opiniones y sentimientos de cada miembro de la familia.

2. Unión: Promovamos la unión familiar, fortaleciendo los lazos afectivos y compartiendo momentos especiales juntos. Recordemos que somos un equipo y podemos apoyarnos mutuamente en los momentos buenos y difíciles.

3. Confianza: Construyamos la confianza mutua a través de la comunicación abierta y sincera. Seamos honestos y respetuosos en nuestras interacciones, brindándonos apoyo y seguridad emocional.

4. Solidaridad: Practiquemos la solidaridad dentro de nuestro hogar, mostrando empatía y ayudándonos unos a otros. Colaboremos en las tareas domésticas, compartamos responsabilidades y mostremos compasión hacia las necesidades de los demás.

[Colores cálidos y llamativos para transmitir alegría y positividad]

¡Un hogar donde se promueven estos valores es un hogar lleno de amor y felicidad!

[Nombre de la familia o mensaje final inspirador]

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Jimmy wants to eat an ice cream cone, but he is limited on how
many carbs he can eat,
so he wants to find the surface area of the cone. It has a slant
height of 7 inches. The
diameter of the cone is 4

Answers

The surface area of the cone would be approximately 29.5 square inches. This calculation can be done using the formula for the surface area of a cone which is A = πr(r + l), where r is the radius and l is the slant height.

1. First, find the radius of the cone which is half of the diameter. Thus, r = 2.

2. Next, substitute the values of r and l into the formula for the surface area of a cone, A = πr(r + l). A = π(2)(2 + 7) = π(2)(9) ≈ 56.5 square inches.

3. Finally, multiply the result by 0.52 to find the surface area of only the top half of the cone, which is where the ice cream would be placed. Thus, the surface area of the cone would be approximately 29.5 square inches.

Jimmy's task is to find the surface area of a cone so that he can calculate how many carbs he is eating when he eats an ice cream cone. The surface area of a cone is important in this calculation because it will help him estimate the amount of ice cream he is eating.

The formula for the surface area of a cone is A = πr(r + l), where r is the radius of the base and l is the slant height. To find the surface area of the cone in this problem, Jimmy first needs to find the radius of the cone, which is half of the diameter.

In this case, the diameter is 4 inches, so the radius is 2 inches. Once Jimmy has found the radius, he can substitute this value along with the slant height into the formula.

The slant height is given in the problem as 7 inches. Thus, A = π(2)(2 + 7) = π(2)(9) ≈ 56.5 square inches. However, Jimmy only needs to find the surface area of the top half of the cone, since that is where the ice cream would be placed.

To do this, he can multiply the result by 0.52. Thus, the surface area of the cone would be approximately 29.5 square inches.

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When a scatterplot is created from a table of values, which statement is correct?
It is possible for two points to have the same x-coordinate and the same y-coordinate.
It is possible for two points to have the same x-coordinate, but it is impossible for them to have the same y-coordinate.
It is possible for two points to have the same y-coordinate, but it is impossible for them to have the same x-coordinate.
It is impossible for two points to have the same x-coordinate or the same y-coordinate.

Answers

When a scatterplot is created from a table of values, the correct statement is: It is possible for two points to have the same x-coordinate and the same y-coordinate.

In a scatterplot, each point represents a specific pair of values, typically an x-coordinate and a corresponding y-coordinate. It is entirely possible for two or more data points to have identical x-coordinates and y-coordinates, resulting in overlapping points on the scatterplot.

Points with the same x-coordinate but different y-coordinates indicate a vertical distribution, while points with the same y-coordinate but different x-coordinates indicate a horizontal distribution. However, it is also possible for points to have the same x-coordinate and the same y-coordinate, resulting in points that lie directly on top of each other when plotted.

Therefore, the statement that allows for the possibility of two points having the same x-coordinate and the same y-coordinate is correct.

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a. Find the open interval(s) on which the function is increasing and decreasing.
b. Identify the function's local and absolute extreme values, if any, saying where they occur,
g(t) = −2t^2+3t+5
a. Find the open intervals on which the function is increasing
A. The function is increasing on the open interval(s)_____ (Type your answer in interval notation)
B. The function is never increasing

Answers

a. The function g(t) = -2t^2 + 3t + 5 is decreasing on the open interval (-∞, 3/4) and increasing on the open interval (3/4, +∞).

To determine the intervals on which the function g(t) = -2t^2 + 3t + 5 is increasing or decreasing, we need to analyze its derivative. Taking the derivative of g(t) with respect to t, we get g'(t) = -4t + 3.

To find where g'(t) = 0, we set -4t + 3 = 0 and solve for t. Solving this equation, we find t = 3/4.

Now, let's examine the sign of g'(t) in the intervals around t = 3/4.

For t < 3/4, if we choose a value less than 3/4, g'(t) will be positive since -4t is a decreasing function. This indicates that g(t) is increasing in the interval (-∞, 3/4).

For t > 3/4, if we choose a value greater than 3/4, g'(t) will be negative since -4t is a decreasing function. This indicates that g(t) is decreasing in the interval (3/4, +∞).

Therefore, the function g(t) is decreasing on the open interval (-∞, 3/4) and increasing on the open interval (3/4, +∞).

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R^2 shows which one of the following choices?

A. the proportion of the variation of the independent variable explained by the dependent variable

B. the proportion of the variation of the dependent variable explained by the independent variable

C. the proportion of the variation of the independent variable not explained by the dependent variable

D. the proportion of the variation of the dependent variable not explained by the independent variable

Answers

B. the proportion of the variation of the dependent variable explained by the independent variable. R^2, also known as the coefficient of determination, measures the goodness of fit of a regression model.

It represents the proportion of the total variation in the dependent variable that is explained by the independent variable(s) in the model. In other words, R^2 indicates how well the independent variable(s) account for the observed variation in the dependent variable. The correct answer, choice B, states that R^2 represents the proportion of the variation of the dependent variable explained by the independent variable.

It quantifies the strength of the relationship between the independent and dependent variables and provides an assessment of how well the regression model fits the observed data. A higher R^2 value indicates a better fit, as it indicates that a larger proportion of the variation in the dependent variable can be attributed to the independent variable(s).

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Find the Laplace transform, F(s) of the function f(t) = et, t > 0. = e F(s) = = = 1 ? Evaluating the integral gives F(s) = Write an inequality in terms s which describes the domain of F.

Answers

The Laplace transform of f(t) = et is given by F(s) = 1/(1-s), and the domain of F(s) is described by the inequality s < 1.

To find the Laplace transform of the function f(t) = et, we can use the definition of the Laplace transform:

F(s) = ∫[0 to ∞] et e^(-st) dt

Simplifying this expression, we have:

F(s) = ∫[0 to ∞] e^(t(1-s)) dt

Integrating this expression, we get:

F(s) = [1/(1-s)] * e^(t(1-s)) evaluated from 0 to ∞

As t approaches ∞, e^(t(1-s)) becomes infinity unless (1-s) is negative. Therefore, to ensure convergence, we must have (1-s) > 0, which implies s < 1. Hence, the domain of F(s) is s < 1.

Therefore, the Laplace transform of f(t) = et is given by F(s) = 1/(1-s), and the domain of F(s) is described by the inequality s < 1.

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7. The following discrete-time signal: \[ x[n]=\{0,2,0,4\} \] is passed through a linear time-invariant (LTI) system described by the difference equation: \[ y[n]=b_{0} x[n]+b_{1} x[n-1]+b_{2} x[n-2]-

Answers

We need additional information about the coefficients \(b_0\), \(b_1\), \(b_2\), \(a_1\), and \(a_2\) to solve for the output signal \(y[n]\).

To determine the output of the LTI system, we can substitute the given values of the input signal \(x[n]\) into the difference equation:

\(y[n] = b_0 x[n] + b_1 x[n-1] + b_2 x[n-2] - a_1 y[n-1] - a_2 y[n-2]\)

Given \(x[n] = \{0, 2, 0, 4\}\), we can substitute these values into the equation:

For \(n = 0\):

\(y[0] = b_0 \cdot x[0] + b_1 \cdot x[-1] + b_2 \cdot x[-2] - a_1 \cdot y[-1] - a_2 \cdot y[-2]\)

\(y[0] = b_0 \cdot 0 + b_1 \cdot 0 + b_2 \cdot 0 - a_1 \cdot y[-1] - a_2 \cdot y[-2]\)

\(y[0] = -a_1 \cdot y[-1] - a_2 \cdot y[-2]\)

For \(n = 1\):

\(y[1] = b_0 \cdot x[1] + b_1 \cdot x[0] + b_2 \cdot x[-1] - a_1 \cdot y[0] - a_2 \cdot y[-1]\)

\(y[1] = b_0 \cdot 2 + b_1 \cdot 0 + b_2 \cdot 0 - a_1 \cdot y[0] - a_2 \cdot y[-1]\)

\(y[1] = b_0 \cdot 2 - a_1 \cdot y[0] - a_2 \cdot y[-1]\)

For \(n = 2\):

\(y[2] = b_0 \cdot x[2] + b_1 \cdot x[1] + b_2 \cdot x[0] - a_1 \cdot y[1] - a_2 \cdot y[0]\)

\(y[2] = b_0 \cdot 0 + b_1 \cdot 2 + b_2 \cdot 0 - a_1 \cdot y[1] - a_2 \cdot y[0]\)

\(y[2] = b_1 \cdot 2 - a_1 \cdot y[1] - a_2 \cdot y[0]\)

For \(n = 3\):

\(y[3] = b_0 \cdot x[3] + b_1 \cdot x[2] + b_2 \cdot x[1] - a_1 \cdot y[2] - a_2 \cdot y[1]\)

\(y[3] = b_0 \cdot 4 + b_1 \cdot 0 + b_2 \cdot 2 - a_1 \cdot y[2] - a_2 \cdot y[1]\)

\(y[3] = b_0 \cdot 4 + b_2 \cdot 2 - a_1 \cdot y[2] - a_2 \cdot y[1]\)

We need additional information about the coefficients \(b_0\), \(b_1\), \(b_2\), \(a_1\), and \(a_2\) to solve for the output signal \(y[n]\).

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Use the definite integral to find the area between the x-axis and f(x) over the indicated interval. Check first to see if the graph crosses the x-axis in the given interval.
f(x)=5/x−5/e; [1,e^3]
The area is _____
(Type an exact answer in simplified form.)

Answers

The area between the x-axis and f(x) over the interval [1, e^3] is 10.To find the area between the x-axis and the curve represented by the function f(x) over the interval [1, e^3], we need to evaluate the definite integral of the absolute value of f(x) within that interval.

First, let's check if the graph of f(x) crosses the x-axis within the given interval by determining if f(x) changes sign.

f(x) = 5/x - 5/e

To find where f(x) changes sign, we set f(x) equal to zero and solve for x:

5/x - 5/e = 0

Multiplying both sides by x and e, we get:

5e - 5x = 0

Solving for x:

5x = 5e

x = e

Since x = e is the only solution within the interval [1, e^3], the graph of f(x) crosses the x-axis at x = e within the given interval.

Now, let's evaluate the area between the x-axis and f(x) over the interval [1, e^3] using the definite integral:

Area = ∫[1, e^3] |f(x)| dx

Since f(x) changes sign at x = e, we can split the interval into two parts: [1, e] and [e, e^3].

For the interval [1, e]:

Area_1 = ∫[1, e] |f(x)| dx

      = ∫[1, e] (5/x - 5/e) dx

      = [5ln|x| - 5ln|e|] [1, e]

      = [5ln|x| - 5] [1, e]

      = 5ln|e| - 5ln|1| - (5ln|e| - 5ln|e|)

      = -5ln(1)

      = 0

For the interval [e, e^3]:

Area_2 = ∫[e, e^3] |f(x)| dx

      = ∫[e, e^3] (5/x - 5/e) dx

      = [5ln|x| - 5ln|e|] [e, e^3]

      = [5ln|x| - 5ln|e|] [e, e^3]

      = 5ln|e^3| - 5ln|e| - (5ln|e| - 5ln|e|)

      = 15ln(e) - 5ln(e)

      = 15 - 5

      = 10

Therefore, the area between the x-axis and f(x) over the interval [1, e^3] is 10.

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Find the limit, if it exists. limx→7 |7-x|/7-x

Answers

The limit as x approaches 7 of the absolute value of (7 - x) divided by (7 - x) exists and is equal to 1.

To evaluate the given limit, we need to analyze the behavior of the expression as x approaches 7. The absolute value function ensures that the numerator, |7 - x|, is always positive or zero.  

When x approaches 7 from the left side, the expression simplifies to (-1)/(7 - x), which approaches -1 as x gets closer to 7. Similarly, when x approaches 7 from the right side, the expression simplifies to (1)/(7 - x), which approaches 1 as x gets closer to 7.

Since the limit of the numerator is always positive or zero, and the limit of the denominator is always positive or zero as well, we can conclude that the limit of the entire expression is the same from both sides. Thus, the limit as x approaches 7 of |7 - x|/(7 - x) exists, and its value is 1.

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The function f(x)=−2x^3 + 33x^2 −108x + 7 has one local minimum and one local maximum. This function has a local minimum at x= _____ with value _______ and a local maximum at x= ________ with value _______

Answers

The function has a local minimum at x = 3 with a value of -104 and a local maximum at x = 9 with a value of 250.

To find the local minimum and local maximum of the function, we need to analyze its critical points and the behavior of the function around those points.

First, we find the derivative of f(x):

f'(x) = -6x^2 + 66x - 108.

Next, we set f'(x) equal to zero and solve for x to find the critical points:

-6x^2 + 66x - 108 = 0.

Dividing the equation by -6 gives:

x^2 - 11x + 18 = 0.

Factoring the quadratic equation, we have:

(x - 2)(x - 9) = 0.

From this, we can see that x = 2 and x = 9 are the critical points.

To determine whether each critical point is a local minimum or local maximum, we need to analyze the behavior of f'(x) around these points. We can do this by evaluating the second derivative of f(x):

f''(x) = -12x + 66.

Evaluating f''(2), we have:

f''(2) = -12(2) + 66 = 42.

Since f''(2) is positive, we can conclude that x = 2 is a local minimum.

Evaluating f''(9), we have:

f''(9) = -12(9) + 66 = -6.

Since f''(9) is negative, we can conclude that x = 9 is a local maximum.

Therefore, the function f(x) has a local minimum at x = 2 with a value of -104 and a local maximum at x = 9 with a value of 250.

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Question 4: UNIVERSI Explain the importance of application of divergence and stoke theorems. Answer: (6 Marks)

Answers

The application of the divergence and Stoke's theorems is essential for establishing conservation laws, analyzing vector fields, solving mathematical and physical problems.

The application of the divergence and Stoke's theorems plays a crucial role in various areas of mathematics and physics. These theorems relate the behavior of vector fields to the properties of their sources and boundaries.

1. Conservation Laws: The divergence theorem, also known as Gauss's theorem, relates the flux of a vector field through a closed surface to the divergence of the field within the volume it encloses. It allows us to establish conservation laws for mass, charge, or energy quantities. By applying the divergence theorem, we can determine the flow of these quantities through closed surfaces and analyze their conservation properties.

2. Field Analysis: The divergence and Stoke's theorems provide powerful tools for analyzing vector fields and understanding their behavior. They enable us to evaluate surface and volume integrals by converting them into simpler line integrals. These theorems establish fundamental relationships between the integrals of vector fields over surfaces and volumes and the behavior of the fields within those regions.

3. Engineering and Physics Applications: The divergence and Stoke's theorems find extensive applications in various scientific and engineering disciplines. In fluid dynamics, these theorems are used to analyze fluid flow, calculate fluid forces, and study fluid properties such as circulation and vorticity. In electromagnetism, they are employed to derive Maxwell's equations and solve problems related to electric and magnetic fields.

4. Fundamental Theoretical Framework: The divergence and Stoke's theorems are essential components of vector calculus, providing a fundamental theoretical framework for solving problems involving vector fields. They establish connections between differential and integral calculus, facilitating the solution of complex problems by reducing them to simpler calculations.

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What is the length of the hypotenuse in the right triangle shown below?

Answers

Answer:

Step-by-step explanation:

6 im pretty sure because both angles are 45 degrees meaning its letter b

Answer:

6√2

Step-by-step explanation:

according to the given right triangle length of the hypotenuse will be calculated as,

cos ∅ = base / hypotenuse

cos 45° = 6 / hypotenuse

hypotenuse = 6 / cos 45°

= 6 / .707 = 8.48 cm

which is equivalent to option A i.e. 6√2

Let f(x)=2sin(x).
a.) ∣f′(x)∣≤ ______
b.) By the Mean Value Theorem, ∣f(a)−f(b)∣≤ _____ ∣a−b∣ for all a and b.

Answers

Here∣f′(x)∣ ≤ 2 and by the Mean Value Theorem, ∣f(a)−f(b)∣ ≤ 2∣a−b∣ for all a and b.

The derivative of f(x) can be found by applying the derivative rule for the sine function. The derivative of sin(x) is cos(x), and multiplying by the constant 2 gives f'(x) = 2cos(x). The absolute value of f'(x) is always less than or equal to the maximum value of cos(x), which is 1. Therefore, we have ∣f′(x)∣ ≤ 2.

The Mean Value Theorem states that if a function is continuous on a closed interval [a, b] and differentiable on the open interval (a, b), then there exists at least one value c in the open interval (a, b) such that f'(c) = (f(b) - f(a))/(b - a). Rearranging the equation, we have |f(b) - f(a)| = |f'(c)|(b - a).

In this case, since f(x) = 2sin(x), we have f'(x) = 2cos(x). The absolute value of f'(x) is less than or equal to 2 (as shown in part a), so we can write |f(b) - f(a)| ≤ 2(b - a). Therefore, we have ∣f(a)−f(b)∣ ≤ 2∣a−b∣ for all values of a and b. This inequality represents the bound on the difference between the values of the function f(x) at two points a and b in terms of the distance |a - b| between those points.

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lim(x,y,z)→(0,0,0) xyz​/​x2+y4+z4 is equal to 1. is equal to 41​. is equal to 0 . is equal to 21​. does not exist.

Answers

Since the limit approaches 0 along different paths, we can conclude that the limit lim(x,y,z)→(0,0,0) [tex]xyz​/​(x^2+y^4+z^4)[/tex] is equal to 0.

To evaluate the limit lim(x,y,z)→(0,0,0) [tex]xyz​/​(x^2+y^4+z^4),[/tex] we can approach the origin along different paths and see if the limit exists and has a consistent value.

Let's consider two paths: the x-axis (y = z = 0) and the y = x^2 path.

Along the x-axis: Setting y = z = 0, the limit becomes:

lim(x→0) x(0)(0) / [tex](x^2+0^4+0^4)[/tex]

= lim(x→0) 0 /[tex]x^2[/tex]

= 0

Along the [tex]y = x^2[/tex] path: Substituting [tex]y = x^2[/tex] and z = 0, the limit becomes:

lim(x→0) [tex]x(x^2)(0) / (x^2+(x^2)^4+0^4)[/tex]

= lim(x→0) 0 / [tex](x^2+x^8)[/tex]

= 0

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What are the nanocomposites that have been applied in Tennis Balls? Why are they applied in Tennis Balls? What are their relevant properties needed for such application? Kindly provide samples of their microstructures and associate them to their properties.

Answers

These nanocomposites improve the performance and longevity of tennis balls by enhancing their strength, elasticity, rebound properties, and wear resistance. The incorporation of CNTs and graphene at the nanoscale contributes to their unique properties, resulting in a superior playing experience for tennis players.

Nanocomposites that have been applied in tennis balls include materials such as carbon nanotubes (CNTs) and graphene. These nanocomposites are used in tennis balls to enhance their performance and durability.

The incorporation of CNTs and graphene into tennis ball materials provides several beneficial properties. Firstly, these nanomaterials improve the ball's strength and stiffness, allowing it to withstand the high impact forces experienced during play. They also enhance the ball's elasticity and rebound properties, leading to increased ball speed and bounce. Additionally, the nanocomposites contribute to better wear resistance, reducing the degradation of the ball over time.

In terms of microstructures, the addition of CNTs and graphene can be observed at the nanoscale. CNTs typically form a network-like structure within the ball's rubber core, creating a reinforcement network that enhances its mechanical properties. Graphene, on the other hand, can be dispersed as thin layers or sheets throughout the rubber matrix, providing additional strength and flexibility.

Overall, these nanocomposites improve the performance and longevity of tennis balls by enhancing their strength, elasticity, rebound properties, and wear resistance. The incorporation of CNTs and graphene at the nanoscale contributes to their unique properties, resulting in a superior playing experience for tennis players.

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10. The area of a square is 81 square centimeters. Find the length of the diagonal. Leave your answer in simplified radical form. 11. An isosceles triangle has congruent sides of 20 cm. The base is 10 cm. Find the height of the triangle. Leave your answer in simplified radical form. Î

Answers

The length of the diagonal of the square is 9√2 centimeters.

The height of the isosceles triangle is 5√15 centimeters.

To find the length of the diagonal of a square, we can use the formula for the diagonal (d) in terms of the side length (s):

d = s√2

Given that the area of the square is 81 square centimeters, we can find the side length (s) by taking the square root of the area:

s = √81

s = 9 cm

Now, we can find the length of the diagonal (d):

d = s√2

d = 9√2 cm

Therefore, the length of the diagonal of the square is 9√2 centimeters.

Now let's move on to the second part of the question:

An isosceles triangle has congruent sides of 20 cm, and the base is 10 cm.

To find the height of the triangle, we can use the Pythagorean theorem.

The height (h) of the isosceles triangle divides the base into two equal segments, each with a length of 5 cm.

Using the Pythagorean theorem, we can set up the equation:

h^2 + 5^2 = 20^2

h^2 + 25 = 400

h^2 = 400 - 25

h^2 = 375

Taking the square root of both sides:

h = √375

Since 375 can be simplified by factoring out the perfect square of 25, we have:

h = √(25 * 15)

h = 5√15 cm

Therefore, the height of the isosceles triangle is 5√15 centimeters.

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[Class note] Find the dual problem of the following LP: (10 pts) min.6y
1

+3y
3

s.t. y
1

−3y
3

=30
6y
1

−3y
2

+y
3

≥25
3y
1

+4y
2

+y
3

≤55

y
1

unresticted in sign, y
2

≥0,y
3

≤0.

Answers

This is the dual problem corresponding to the given primal LP problem.

To find the dual problem of the given linear programming (LP) problem, we need to follow these steps:

Step 1: Convert the LP problem to standard form.

The given LP problem is already in standard form.

Step 2: Identify the decision variables.

The decision variables in the primal problem are y1, y2, and y3.

Step 3: Write the objective function and constraints of the primal problem in matrix form.

The objective function: Minimize 6y1 + 3y3 can be written as:

Minimize c^T*y, where c = [6, 0, 3] and y = [y1, y2, y3]^T.

The constraints:

y1 - 3y3 = 30 can be written as:

Ay = b, where A = [1, 0, -3] and b = [30].

6y1 - 3y2 + y3 ≥ 25 can be written as:

Ay ≥ b, where A = [6, -3, 1] and b = [25].

3y1 + 4y2 + y3 ≤ 55 can be written as:

Ay ≤ b, where A = [3, 4, 1] and b = [55].

Step 4: Transpose the matrices A, c, and b.

Transpose A to obtain A^T, transpose c to obtain c^T, and transpose b to obtain b^T.

A^T = [1, 6, 3; 0, -3, 4; -3, 1, 1]

c^T = [6, 0, 3]

b^T = [30, 25, 55]

Step 5: Write the dual problem using the transposed matrices.

Maximize b^T * u, subject to A^T * u ≤ c^T and u unrestricted in sign.

The dual problem for the given primal problem is:

Maximize 30u1 + 25u2 + 55u3

subject to:

u1 + 6u2 + 3u3 ≤ 6

-3u2 + u3 ≤ 0

u1 + 4u2 + u3 ≥ 3

u1, u2 unrestricted in sign, u3 ≤ 0

This is the dual problem corresponding to the given primal LP problem.

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Place in order, from beginning to end, the steps to calculate the mean absolute deviation.
- Calculate the arithmetic mean for the data set.
- Divide by the sample (or the population) size.
- Find the absolute difference between each value and the mean.
- Sum the absolute differences.

Answers

To calculate the mean absolute deviation (MAD), the steps are as follows:

Calculate the arithmetic mean for the data set.Find the absolute difference between each value and the mean.Sum the absolute differences.Divide the sum of absolute differences by the sample (or the population) size.

The first step is to find the average of the data set by summing all the values and dividing by the total number of values. The arithmetic mean represents the central tendency of the data set.

After calculating the mean, you need to find the absolute difference between each data point and the mean. To do this, subtract the mean from each individual value and take the absolute value (ignoring the sign). This step measures the deviation of each data point from the mean, regardless of whether the value is above or below the mean.

Once you have obtained the absolute differences for each data point, add them all together. This step involves summing the absolute values of the deviations calculated in the previous step. The result is a single value that represents the total deviation from the mean for the entire data set.

Finally, divide the sum of absolute differences by the number of data points in the sample (if it's a sample MAD) or the population (if it's a population MAD).

This step computes the average deviation by dividing the total deviation by the number of data points. It gives you the mean absolute deviation, which represents the average amount by which each data point deviates from the mean.

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Find a vector a with representation given by the directed line segment AB.
A(−5,−2),B(3,5)
Draw AB and the equivalent representation starting at the origin.

Answers

The vector a with representation given by the directed line segment AB, where A(-5, -2) and B(3, 5), is a = B - A = (3, 5) - (-5, -2) = (8, 7). The equivalent representation of vector a starting at the origin is (8, 7).

To find the vector a with representation given by the directed line segment AB, we subtract the coordinates of point A from the coordinates of point B. This can be represented as a = B - A.

Given A(-5, -2) and B(3, 5), we have a = (3, 5) - (-5, -2).

Performing the subtraction, we get a = (3 - (-5), 5 - (-2)) = (8, 7).

This means that vector a is equal to (8, 7), which represents the directed line segment AB.

To draw the equivalent representation of vector a starting at the origin, we simply start at the origin (0, 0) and move 8 units in the positive x-direction and 7 units in the positive y-direction. This gives us the point (8, 7) on the coordinate plane.

Therefore, the equivalent representation of vector a starting at the origin is (8, 7).

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Find a unit normal vector to the surface at the given point [ Hint : normalize the gradient vector ∇F(x,y,z)]
Surface Point
X^2+y^2+z^2 = 34 (3,3,4)
________

Answers

The unit normal vector to the surface at the point (3, 3, 4) is (3 / √34, 3 / √34, 4 / √34).

First, we define the function F(x, y, z) = x² + y² + z² - 34.

The gradient vector ∇F(x, y, z) is given by:

∇F(x, y, z) = (∂F/∂x, ∂F/∂y, ∂F/∂z)

Taking partial derivatives of F(x, y, z) with respect to x, y, and z, we have:

∂F/∂x = 2x

∂F/∂y = 2y

∂F/∂z = 2z

Substituting the given point (3, 3, 4) into the partial derivatives, we get:

∂F/∂x = 2(3) = 6

∂F/∂y = 2(3) = 6

∂F/∂z = 2(4) = 8

Therefore, the gradient vector ∇F(3, 3, 4) = (6, 6, 8).

The magnitude (length) of the gradient vector is given by:

|∇F(3, 3, 4)| = √(6² + 6² + 8²) = √(36 + 36 + 64) = √136 = 2√34

Finally, we divide each component of the gradient vector by its magnitude to obtain the unit normal vector:

Unit Normal Vector = (6 / (2√34), 6 / (2√34), 8 / (2√34))

= (3 / √34, 3 / √34, 4 / √34)

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Test the stability of a discrete control system with an open loop transfer function: G(z)=(0.2z+0.5)/(z^2 -1.2z+0.2).

a. Unstable with P(1)=-0.7 and P(-1)=-2.7 b. Stable with P(1)=1.7 and P(-1)=2.7 c. Unstable with P(1)=-0.7 and P(-1)=2.7 d. Stable with P(1)-0.7 and P(-1)=2.7

Answers

The system stable with P(1)=1.7 and P(-1)=2.7. The correct answer is b.

To test the stability of a discrete control system with an open loop transfer function, we need to examine the roots of the characteristic equation, which is obtained by setting the denominator of the transfer function equal to zero.

The characteristic equation for the given transfer function G(z) is:

z^2 - 1.2z + 0.2 = 0

We can find the roots of this equation by factoring or using the quadratic formula. In this case, the roots are complex conjugates:

z = 0.6 + 0.4i

z = 0.6 - 0.4i

For a discrete control system, stability is determined by the location of the roots in the complex plane. If the magnitude of all the roots is less than 1, the system is stable. If any root has a magnitude greater than or equal to 1, the system is unstable.

In this case, the magnitude of the roots is less than 1, since:

|0.6 + 0.4i| = sqrt(0.6^2 + 0.4^2) ≈ 0.75

|0.6 - 0.4i| = sqrt(0.6^2 + 0.4^2) ≈ 0.75

Therefore, the system is stable.

The correct answer is:

b. Stable with P(1)=1.7 and P(-1)=2.7

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Find the volume of the parallelepiped determined by the vectors a=⟨2,4,−1⟩,b=⟨0,1,4⟩, c=⟨2,5,1⟩.
Volume = -4 cubic-units

Answers

The volume of the parallelepiped determined by the vectors a, b, and c is |16| = 16 cubic-units.  

Given vectors a = ⟨2, 4, −1⟩, b = ⟨0, 1, 4⟩ and c = ⟨2, 5, 1⟩.

We need to find the volume of the parallelepiped determined by these vectors.

The volume of the parallelepiped is given by the scalar triple product of the vectors a, b and c and can be written as: V = a · (b × c) where a is the vector given by ⟨2, 4, −1⟩, b is the vector given by ⟨0, 1, 4⟩ and c is the vector given by ⟨2, 5, 1⟩.

The cross product b × c can be found by multiplying i, j, k into a determinant, as follows:|i  j  k ||0  1  4 ||2  5  1| = i(−1(1) − 4(5)) − j(0(1) − 4(2)) + k(0(5) − 1(2))= −9i + 8j − 2k

So, we have b × c = −9i + 8j − 2k Then, the scalar triple product of the vectors a, b, and c can be found as follows:a · (b × c) = ⟨2, 4, −1⟩ · (−9i + 8j − 2k)= 2(−9) + 4(8) + (−1)(−2)= −18 + 32 + 2= 16

Therefore, the volume of the parallelepiped determined by the vectors a, b, and c is |16| = 16 cubic-units.

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1. (1 point) State the Mean-Value Theorem (MVT). 2. (1 point) Let \( f(x)=x^{2}-6 x^{2}-5 \) on \( [-2,3] \). Find the value \( c \), guaranteed by the \( M V T \) so that: \[ \frac{f(b)-f(a)}{b-a}=f^

Answers

The value of c guaranteed by MVT is 29/20.

Mean-Value Theorem (MVT) states that if a function is continuous on the interval [a, b] and differentiable on the interval (a, b), then there exists at least one point c in (a, b) such that:

[tex]\[\frac{f(b)-f(a)}{b-a}=f^{\prime}(c)\][/tex]

The solution to the given problem is as follows:

Given,

[tex]\[f(x) = x^2 - 6x^2 - 5\][/tex]

We have to find the value of c for the interval [-2, 3].Thus, a = -2, b = 3, and f(x) is continuous on [-2, 3] and differentiable on (-2, 3).Now, we have to find the value of c, using Mean-Value Theorem (MVT).

By MVT,

[tex]\[\frac{f(b) - f(a)}{b - a} = f'(c)\][/tex]

Differentiating f(x), we get,

[tex]\[f'(x) = 2x - 12x\][/tex]

Therefore[tex],\[\frac{f(b) - f(a)}{b - a} = f'(c)\][/tex]

Plugging in the values of f(b), f(a), and f'(c), we get:[tex]\[\frac{f(b) - f(a)}{b - a} = \frac{(3)^2 - 6(3)^2 - 5 - [(-2)^2 - 6(-2)^2 - 5]}{3 - (-2)}\][/tex]

On solving, we get:[tex]\[\frac{f(b) - f(a)}{b - a} = \frac{8}{5}\][/tex]

Now, we have to find the value of c.

Using MVT, we have:[tex]\[\frac{8}{5} = 2c - 12\]\\\\\\\\On solving, we get:\\\\\\\[c = \frac{29}{20}\][/tex]

Therefore, the value of c guaranteed by MVT is 29/20.

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Find the general solution of the given second-order differential equation.

y′′−3y′+2y = 0
y(x) = ____

Answers

The general solution of the second-order differential equation y′′−3y′+2y = 0 is y(x) = C₁e^(2x) + C₂e^x, where C₁ and C₂ are arbitrary constants.

To find the general solution of the given second-order differential equation y′′−3y′+2y = 0, we assume a solution of the form y(x) = e^(mx). By substituting this into the differential equation, we get the characteristic equation m² - 3m + 2 = 0. Factoring the quadratic equation, we find two roots: m₁ = 2 and m₂ = 1. Therefore, the general solution is y(x) = C₁e^(2x) + C₂e^x, where C₁ and C₂ are arbitrary constants determined by initial or boundary conditions. This solution represents a linear combination of exponential functions with the roots of the characteristic equation. The constants C₁ and C₂ can be determined by applying any given initial or boundary conditions.

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Find the general solution of the given differential equation and then find the specific solution satisfying the given initial conditions:

y′+5x^4y^2 = 0 with initial conditions y(0) =1

Answers

The general solution of the given differential equation y' + 5x^4y^2 = 0 is y = ±1/sqrt(1+2x^5/5) with the constant of integration C. The specific solution satisfying the initial condition y(0) = 1 is y = 1/sqrt(1+2x^5/5).

To find the general solution, we can rewrite the differential equation as dy/dx = -5x^4y^2. This is a separable differential equation, where we can separate the variables and integrate both sides. Rearranging, we have dy/y^2 = -5x^4 dx. Integrating both sides gives ∫(1/y^2) dy = -5∫x^4 dx. Integrating the left side results in -1/y = -x^5/5 + C, where C is the constant of integration. Solving for y gives y = ±1/sqrt(1+2x^5/5) with the constant C.

To find the specific solution satisfying the initial condition y(0) = 1, we substitute x = 0 and y = 1 into the general solution. This gives 1 = ±1/sqrt(1+2(0)^5/5). Since we are given y(0) = 1, the solution is y = 1/sqrt(1+2x^5/5).

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Which expression is equivalent to this product?
2x 14
22 +248 +40
.
OA.
O B.
O C.
O.D.
8
3(x - 5)(x+5)
8(+7)
3(x+5)
8(x + 7)
3(x5)
8
3(x - 5)
Mallawan

Answers

The expression that is equivalent to the product is 8/3(x -5). Option D

How to determine the product

From the information given, we have the expression as;

2x + 14/x² - 25 × 8x + 40/6x + 42

First, we have to simply the numerators and denominators, we have;

2(x + 7)/(x - 5)(x + 5) × 8(x + 5)/6(x+ 7)

Now, divide the common numerators and denominators, we get;

2/x -5 × 8/6

Multiply the values and expand the bracket, we have;

16/6(x - 5)

simply the fraction, we get;

8/3(x -5)

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Q1. The total number of defects X on a chip is a Poisson random variable with mean a. Each defect has a probability p of falling in a specific region R and the location of each defect is independent of the locations of other defects. Let Y be the number of defects inside the region R and let Z be the number of defects outside the region.
(a) Find the pmf of Z given Y, P[Z=nY=m].
(b) Find the joint pmf of Y and Z. P[Z-n,Y=m].
(c) Determine whether Y and Z are independent random variables or not.

Answers

The joint pmf of X, Y and Z is given as: e^(-a(1-p))(a(1-p))^k/k! and Y and Z are not independent because the occurrence of one event affects the occurrence of another event

(a) The pmf of Z given Y is given as follows:

P[Z=nY=m] = P[Z=n, X=m]/P[Y=m]

By Bayes' theorem,

we have:

P[Z=nY=m] = P[Z=n|X=m]P[X=m]/P[Y=m]

We know that Y and X are Poisson random variables and we are given that the location of each defect is independent of the locations of other defects.

So the number of defects falling inside region R will follow the Poisson distribution with mean λ1 = ap and the number of defects falling outside of R will follow the Poisson distribution with mean λ2 = a(1-p).

Therefore, the joint pmf of X, Y and Z is given as:

P[X=m, Y=n, Z=k] = P[X=m] * P[Y=n] * P[Z=k]

where P[X=m] = e^(-a)a^m/m!

and P[Y=n] = e^(-ap)(ap)^n/n! and P[Z=k]

                  = e^(-a(1-p))(a(1-p))^k/k!.

Thus:

P[Z=nY=m] = (a(1-p))^n * (ap)^m * e^(-a(1-p)-ap) / n!m! * e^(-ap) / (ap)^n * e^(-a(1-p)) / (a(1-p))^m

                  = e^(-a)p^n(1-p)^m * a^n(1-p)^n/(ap)^n * a^m(ap)^m/(a(1-p))^m

                  = (1-p)^m * (a(1-p)/ap)^n * a^m/p^n(1-p)^n * (1/a(1-p))^m

                  = (1-p)^m * (1/p)^n * a^m * (1-a/p)^m

                  = (1-p)^Z * (1/p)^Y * a^Z * ((1-p)/p)^Z

                  = (1-p)^(n-m) * a^m * (1-a/p)^n(b)

We already have the joint pmf of X, Y and Z.

So:

P[Z=n, Y=m] = Σ P[X=m, Y=n, Z=k]

                   = Σ e^(-a)p^n(1-p)^m * a^n(1-p)^n/n! * e^(-a(1-p))(a(1-p))^k/k! * e^(-ap)/ (ap)^n * e^(-a(1-p)) / (a(1-p))^m

                   = e^(-a) * a^m/m! * Σ [(1-p)^k/n! * (ap)^n * (1-p)^n/(a(1-p))^k/k!]

                   = e^(-a) * a^m/m! * [(ap + a(1-p))^m/m!]

                   = e^(-a) * a^m/m! * e^(-a)p^m

                   = e^(-a)p^Y * e^(-a(1-p))^Z * a^Y * a(1-p)^Z(c)

Y and Z are not independent because the occurrence of one event affects the occurrence of another event.

Therefore, we can write:

P[Y=m] = Σ P[X=m, Y=n, Z=k]

          = Σ P[X=m] * P[Y=n] * P[Z=k]andP[Z=k]

          = Σ P[X=m, Y=n, Z=k]

          = Σ P[X=m] * P[Y=n] * P[Z=k]

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A survey asked employees and customers whether they preferred the store's old hours or new hours.
The results of the survey are shown in the two-way relative frequency table.

What percent of the respondents preferred the new hours?

Answers

The percent of the respondents that preferred the new hours is equal to 39%.

What is a frequency table?

In Mathematics and Statistics, a frequency table can be used for the graphical representation of the frequencies or relative frequencies that are associated with a categorical variable or data set.

Based on the information provided about this survey with respect to employees and customers shown in a two-way relative frequency table, the percentage of the respondents that preferred the new hours can be calculated as follows;

Percent new hours = (0.16 + 0.23) × 100

Percent new hours = 0.39 × 100

Percent new hours = 39%.

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Find the exact coordinates of the point at -45° on a circle with radius 4 centered at the origin.
NOTE: Do not use trigonometric functions in your answer.

Answers

The exact coordinates of the point at -45° on a circle with radius 4 centered at the origin are (2√2, -2√2).

A circle with radius 4 centered at the origin, and the point at -45° on the circle is to be found.The approach is as follows:On a circle with radius r, if a point P makes an angle θ with the positive x-axis, the coordinates of P are given by (r cos θ, r sin θ).

The exact coordinates of the point at -45° on a circle with radius 4 centered at the origin is:(4 cos (-45°), 4 sin (-45°))

We know that cos(-θ) = cos(θ) and sin(-θ) = -sin(θ)

we have:(4 cos (-45°), 4 sin (-45°)) = (4 cos 45°, -4 sin 45°)

Using the fact that cos 45° = sin 45° = √2/2, we get:(4 cos 45°, -4 sin 45°) = (4(√2/2), -4(√2/2))= (2√2, -2√2)

The exact coordinates of the point at -45° on a circle with radius 4 centered at the origin are (2√2, -2√2).

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[This legal position cannot be altered]. ...It may be desirable for Parliament to consider whether this distinction between the law and commercial practice should be maintained. This is especially the case today With the reference to the quote above (as modified for purposes of this assessment), discuss with your client whether you agree or not with these judicial statements. Your answer, in the form of a written report, must offer supporting reasons with reference to relevant law. END OF QUESTION Important: Your answer must be supported by both policy considerations and the operation of the law (ie. relevant statutory provisions in the Corporations Act and relevant case law). You are not expected to discuss the facts and issues in the legal case above. Consider the equation of a quadric surface given by 4x^2+y^2+z^2/2=1. Sketch the traces with x = 0,y = 0 and z = 0 Which issue prevents mango production from contributingto Bangladesh's economy? Which would you choose to measure a high value ofcurrent e.g 2000AThe bar primary type current transformer or the wound primary typeand why? although money is really just a fancy piece of paper, it is demanded throughout society. money is valued for all of the following reasons except: A ______ allows a patient to access routine information and perform tasks such as making appointments online.1) Patient e-mail2) Provider portal3) Patient portal4) Practice website A patient is scheduled for a hemorrhoidectomy at an ambulatory day surgery-center. An advantage of performing surgery at an ambulatory center is a decreased need fora. laboratory tests and perioperative medicationsb. preoperative and postoperative teaching by the nursec. psychologic support to alleviate fears of pain and discomfortd. preoperative nursing assessment related to possible risks and complications as the owner of a business, quickly admitting that the firm is in trouble indicates a lack of accountability.a. trueb. false Drum brakes automatically pump the brakes if wheel lock is imminent so long as the motorist continues to fully depress the brake pedal.true or False? The angle between A = -(25 m)i + (45 m) and the positive x axis is: OA. 119 OB. 151 OC. 61 OD. 29 O E. 209 A Moving to another question will save this response. Question 29 A 25-g ball is released from rest 80 m above the surface of the Earth. During the fall the total thermal energy of the ball and air increases by15 J. Just before it hits the surface its speed is O A. 35 m/s OB. 19 m/s O C. 40 m/s O D. 53 m/s O E. 45 m/s Question 31 A vector has a component of 10 m in the + x direction, a component of 10 m in the + y direction, and a component of 5 m in the + z direction. The magnitude of this vector is: O A. 225 m O B. 25 m OC.0m O D. 15 m O E. 20 m Solve the following boundary value problem. y" - 20y' + 100y = 0, y(0) = 2, y(1) = 2 A water trough has vertical ends that have the shape of a half circle with radius 10 meters. The level of water is 5 meters below the surface of the water trough Sketch one of the ends of the water trough and find the fluid force on the end of the trough Which one of the following statements about the Employment Standards Code is FALSE? Select one: a. By signing a written employment contract to that effect, an employer can have an employee agree that the provisions of the Employment Standards Code will not apply to their employment relationship. b. This statute sets out the minimum employment standards for Alberta employers and employees. c. A highly qualified, elderly employee who is wrongfully terminated after 20 years of service will probably recover a much more generous remedy by suing his former employer rather than filing a complaint under the Employment Standards Code. d. One can look to the Employment Standards Code to find out what an employee's minimum vacation and holiday entitlements are.