Find the simple interest on 8000.00 for 3 years at 3.5% per annum​

The solution to the system of equations 7x - 4y + 8z = 37, 3x + 2y - 4z = 1 and x²  + y²  +  z²  = 14 is

[tex]\begin{pmatrix}x=\frac{105}{35},\:&y=\frac{2}{5},\:&z=\frac{11}{5}\\ x=\frac{105}{35},\:&y=-2,\:&z=1\end{pmatrix}[/tex]

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

7x - 4y + 8z = 37

3x + 2y - 4z = 1

x²  + y²  +  z²  = 14

From the first equation, we can solve for x:

7x - 4y + 8z = 37

x = (4y - 8z + 37)/7

Substituting this expression for x into the second equation, we get:

3x + 2y - 4z = 1

3((4y - 8z + 37)/7) + 2y - 4z = 1

(12y - 24z + 111)/7 + 2y - 4z = 1

26y - 46z = -64

We can rearrange this equation as:

13y - 23z = -32

Next, we solve the system graphically, where we have the solutions to be

[tex]\begin{pmatrix}x=\frac{105}{35},\:&y=\frac{2}{5},\:&z=\frac{11}{5}\\ x=\frac{105}{35},\:&y=-2,\:&z=1\end{pmatrix}[/tex]

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The closest linear combination of (1, 2, -1) and (1, 0, 1) to b is:

(3/4, 0, 3/4)

To find the linear combination of (1, 2, -1) and (1, 0, 1) that is closest to b = (2, 1, 1), we can use the projection formula:

proj_u(b) = ((b . u) / (u . u)) * u

where u is one of the vectors we are using to form the linear combination, and "." denotes the dot product.

Let's start by finding the projection of b onto (1, 2, -1):

proj_(1,2,-1)(2,1,1) = ((2,1,1) . (1,2,-1)) / ((1,2,-1) . (1,2,-1)) * (1,2,-1)

= (0) / (6) * (1,2,-1)

= (0,0,0)

Since the projection of b onto (1, 2, -1) is the zero vector, we know that (1, 2, -1) is orthogonal to b. This means that the closest linear combination of (1, 2, -1) and (1, 0, 1) to b will only involve (1, 0, 1).

Let's find the projection of b onto (1, 0, 1):

proj_(1,0,1)(2,1,1) = ((2,1,1) . (1,0,1)) / ((1,0,1) . (1,0,1)) * (1,0,1)

= (3/2) / (2) * (1,0,1)

= (3/4,0,3/4)

So the closest linear combination of (1, 2, -1) and (1, 0, 1) to b is:

(3/4, 0, 3/4)

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Answer: D

Step-by-step explanation:

x represents gallons of gas

domain is what your x's could be

x can't be a negative becausue you can't get negative gallons of gas so

x can't be -4

D

The minimum pumping length of {} is any positive integer, of {a} is 1, {a, aaaa, aa}: 1, σ∗: 1 and of {ϵ} is not regular

To find the minimum pumping length for a given language, we need to consider the smallest possible strings in the language and find the smallest length at which we can apply the pumping lemma.

{} (the empty language): There are no strings in the language, so the pumping lemma vacuously holds for any pumping length. The minimum pumping length is any positive integer.

{a}: The smallest string in the language is "a". We can choose the pumping length to be 1, since any substring of "a" of length 1 is still "a". Thus, the minimum pumping length is 1.

{a, aaaa, aa}: The smallest string in the language is "a". We can choose the pumping length to be 1, since any substring of "a" of length 1 is still "a". Thus, the minimum pumping length is 1.

σ∗ (the Kleene closure of σ): Any string over {a} is in the language, including the empty string. We can choose the pumping length to be 1, since any substring of any string in the language of length 1 is still in the language. Thus, the minimum pumping length is 1.

{ϵ} (the language containing only the empty string): The smallest string in the language is the empty string, which has length 0. However, the pumping lemma requires that the pumping length be greater than 0. Since there are no other strings in the language, we cannot satisfy the pumping lemma for any pumping length. Thus, the language {ϵ} is not regular.

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False. It is not generally suggested that the sample size in developing a multiple regression model should be at least four times the number of independent variables.

There is no specific rule or guideline that states the sample size in developing a multiple regression model should be at least four times the number of independent variables. The appropriate sample size for a multiple regression model depends on various factors, such as the desired level of statistical power, the effect size, and the level of significance. In general, a larger sample size is preferred as it can increase the statistical power and reliability of the results.

However, the relationship between sample size and the number of independent variables is not fixed at a specific ratio like four times. It is important to consider the specific context of the study and the research question when determining the appropriate sample size for a multiple regression model.

Therefore, it is not accurate to suggest that the sample size should be at least four times the number of independent variables.

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The type of r.v.R is a continuous random variable, since its possible values form a continuous interval [0,1].

The sample space of R is the interval [0,1], since the distance from the origin to any point inside the unit circle is between 0 and 1.
To find P(R < r), we need to find the probability that the randomly selected point falls inside a circle of radius r centered at the origin. The area of this circle is πr^2, and the area of the entire unit circle is π, so the probability is P(R < r) = πr^2/π = r^2.
The cdf of R is the function F(r) = P(R ≤ r) = ∫0r 2πx dx / π = r^2, where the integral is taken over the interval [0,r]. This is because the probability that R is less than or equal to r is the same as the probability that the randomly selected point falls inside the circle of radius r centered at the origin, which has area πr^2. The cdf of R is a continuous and increasing function on the interval [0,1].

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If the "swimming-pool" for children is built with rectangular-prism and 2 halves of cylinder, then the total volume of pool is 312.64 m³.

From the figure, we observe that the swimming pool is made up of a rectangular prism, and 2 halves of cylinder,

the diameter of the half of cylinder is = 16m ,

So, radius of the half of cylinder is = 16/2 = 8m,

The volume of 2 halves of cylinder is = πr²h,

Substituting the values,

We get,

Volume of 2 halves of cylinder is = π × 8 × 8 × 0.6 ≈ 120.64 m³,

Now, the volume of the rectangular prism is = 20 × 16 × 0.6 = 192 m³,

So, the Volume of the swimming pool is = 192 + 120.64 = 312.64 m³.

Therefore, the total volume of swimming pool is 312.64 m³.

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The point estimate for the plants' survival rate in the humid environment is 42%.

To calculate the point estimate, divide the number of successful outcomes (plants alive) by the total number of trials (total plants). In this case, 21 plants were alive out of 50, so the calculation would be 21/50.

This gives you a decimal (0.42), which you can convert into a percentage by multiplying by 100, resulting in 42%. The point estimate represents the proportion of plants that survived in the humid environment after one month, providing an indication of the new environment's effect on the plants' survival.

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The equation of the tangent plane at point (7, 5, 11) is z - 11 = 4(x - 7) + 8(y - 5) + 8(z - 11)

To find the equation of the tangent plane at point (7, 5, 11), we need to compute the partial derivatives of the given function with respect to x, y, and z, and then use the point-slope form of the tangent plane equation. The given function is:

f(x, y, z) = 2(x - 6)² + 2(y - 3)² + 2(z - 9)² - 10

Now, let's find the partial derivatives:

∂f/∂x = 4(x - 6)
∂f/∂y = 4(y - 3)
∂f/∂z = 4(z - 9)

Evaluate these partial derivatives at the point (7, 5, 11):

∂f/∂x(7, 5, 11) = 4(7 - 6) = 4
∂f/∂y(7, 5, 11) = 4(5 - 3) = 8
∂f/∂z(7, 5, 11) = 4(11 - 9) = 8

Now, use the point-slope form of the tangent plane equation:

Tangent Plane: z - z₀ = ∂f/∂x(x - x₀) + ∂f/∂y(y - y₀) + ∂f/∂z(z - z₀)

Plugging in the point (7, 5, 11) and the partial derivatives:

z - 11 = 4(x - 7) + 8(y - 5) + 8(z - 11)

This is the equation of the tangent plane at point (7, 5, 11).

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The complete solution set for the polynomial equation x^4 - 2x^3 - 6x^2 + 14x - 7 = 0 is {(-1 + √29i)/2, (-1 - √29i)/2, 1, 1}.

We are given that the polynomial equation x^4 - 2x^3 - 6x^2 + 14x - 7 = 0 has a partial solution set of {1, 1}. This means that if we substitute x = 1 into the equation, we get 0 as the result.

We can use polynomial division to factor the given polynomial using (x-1) as a factor. Performing the polynomial division, we get:

x^4 - 2x^3 - 6x^2 + 14x - 7 = (x-1)(x^3 - x^2 - 7x + 7)

Now, we need to find the roots of the cubic polynomial x^3 - x^2 - 7x + 7. One of the simplest methods to find the roots is by using the Rational Root Theorem, which states that any rational root of the polynomial must be of the form p/q, where p is a factor of the constant term and q is a factor of the leading coefficient. In this case, the possible rational roots are ±1, ±7. Testing these values, we find that x = 1 is a root of the cubic polynomial, since when we substitute x = 1, we get 0 as the result.

Using polynomial division again, we can factor the cubic polynomial as follows:

x^3 - x^2 - 7x + 7 = (x-1)(x^2 + x - 7)

The quadratic factor can be factored further using the quadratic formula, which gives:

x = (-1 ± √29i)/2 or x = 1

Therefore, the complete solution set for the polynomial equation x^4 - 2x^3 - 6x^2 + 14x - 7 = 0 is {(-1 + √29i)/2, (-1 - √29i)/2, 1, 1}.

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Answer:

35

Step-by-step explanation:

The exponential function that models the population of Trenton, NJ since 1980 is: P(t) = 92124 * [tex](1-0.0272)^t[/tex]

1. The initial population in 1980 is given as 92,124.

2. The rate of decrease is 2.72% or 0.0272 in decimal form.

3. Since the population is decreasing, we subtract the rate from 1 (1 - 0.0272 = 0.9728).

4. The exponential function is written in the form P(t) = P₀ * [tex](1 +r)^t[/tex] , where P₀ is the initial population, r is the rate of change, and t is the number of years after 1980.

5. In this case, P₀ = 92124, r = -0.0272, and we want to find the population at time t.

6. Therefore, the exponential function that models this situation is P(t) = 92124 * [tex](0.9728)^t[/tex] .

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a) Cylindrical coordinates for point (-5, 5, 5) are (r, θ, z) = (√50, 3π/4, 5).
b) Cylindrical coordinates for point (-3, 3√3, 1) are (r, θ, z) = (6, 5π/6, 1).

We will use the following equations:

1. r = √(x² + y²)
2. θ = arctan(y/x) (note: make sure to take the quadrant into account)
3. z = z (z-coordinate remains the same)

(a) For the point (-5, 5, 5):

1. r = √((-5)² + 5²) = √(25 + 25) = √50
2. θ = arctan(5/-5) = arctan(-1) = 3π/4 (in the 2nd quadrant)
3. z = 5

So, the cylindrical coordinates for point (-5, 5, 5) are (r, θ, z) = (√50, 3π/4, 5).

(b) For the point (-3, 3√3, 1):

1. r = √((-3)² + (3√3)²) = √(9 + 27) = √36 = 6
2. θ = arctan((3√3)/-3) = arctan(-√3) = 5π/6 (in the 2nd quadrant)
3. z = 1

So, the cylindrical coordinates for point (-3, 3√3, 1) are (r, θ, z) = (6, 5π/6, 1).

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The shortest distance from the point (3, 0, −2) to the plane x + y + z = 2 is √(3) or approximately 1.732 units.

To find the shortest distance, d, from the point (3, 0, −2) to the plane x + y + z = 2, we need to use the formula for the distance between a point and a plane.

First, we need to find the normal vector of the plane. The coefficients of x, y, and z in the plane equation (1, 1, 1) form the normal vector (since the plane is perpendicular to this vector).

Next, we can use the point-to-plane distance formula:

d = |(ax + by + cz - d) / √(a² + b² + c²)|

where (a, b, c) is the normal vector of the plane, (x, y, z) is the coordinates of the point, and d is the constant term in the plane equation.

Plugging in the values, we get:

d = |(1(3) + 1(0) + 1(-2) - 2) / √(1² + 1² + 1²)|

d = |(1 + 0 - 4) / √(3)|

d = |-3 / √(3)|

d = |-√(3)|

Therefore, the shortest distance from the point (3, 0, −2) to the plane x + y + z = 2 is √(3) or approximately 1.732 units.

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The work done in towing the car 2 kilometers is approximately 2,900,220 Joules.

To find the work done, we can use the formula:

Work = Force × Distance × cos(θ)

Here, Force = 1600 Newtons, Distance = 2 kilometers (2000 meters, as 1 km = 1000 m), and θ = 25° angle.

Step 1: Convert angle to radians.

To do this, multiply the angle by (π/180).

In this case, 25 × (π/180) ≈ 0.4363 radians.

Step 2: Calculate the horizontal component of force using the cosine of the angle.

Horizontal force = Force × cos(θ)

= 1600 × cos(0.4363)

≈ 1450.11 Newtons.

Step 3: Calculate the work done using the formula.

Work = Horizontal force × Distance

= 1450.11 × 2000 ≈ 2,900,220 Joules.

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The work done in towing the car 2 kilometers is approximately 2,900,220 Joules.

To find the work done, we can use the formula:

Work = Force × Distance × cos(θ)

Here, Force = 1600 Newtons, Distance = 2 kilometers (2000 meters, as 1 km = 1000 m), and θ = 25° angle.

Step 1: Convert angle to radians.

To do this, multiply the angle by (π/180).

In this case, 25 × (π/180) ≈ 0.4363 radians.

Step 2: Calculate the horizontal component of force using the cosine of the angle.

Horizontal force = Force × cos(θ)

= 1600 × cos(0.4363)

≈ 1450.11 Newtons.

Step 3: Calculate the work done using the formula.

Work = Horizontal force × Distance

= 1450.11 × 2000 ≈ 2,900,220 Joules.

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1. Identify the linear equation. y = mx + b
2. Take (b) and plot it on the y axis. Since b is a positive 3, that means you plot a positive 3 on the y axis. This will be the number that your line crosses the y axis on.
3. Take (mx) and plot it in correlation to (b). mx = -x also known as -1. So, from +3 on the y axis, move once to the left and once down. Your coordinate should land on (2, 1).

From here on out, keep moving -1 on the y axis and +1 on the x axis. The ongoing coordinates should look something like (1, 2)(0, 3)(-1, 4) and so on.

a) U(X) is a nonzero function that satisfies E[U(X)] = 0, which shows that the family fo(x) = 2 is not complete.

b) U(X) is a nonzero function that satisfies E[U(X)] = 0, which shows that the family N(0,0) is not complete.

A nonzero function is a mathematical function that takes at least one value different from zero within its domain. In other words, there exists at least one input value for which the output value is not equal to zero.

i) To show that the family fo(x) = 2 is not complete, we need to find a nonzero function U(X) such that E[U(X)] = 0 for all e > 0. Let U(X) be defined as:

U(X) = { -1 if -4 < X < 0

1 if 0 < X < 4

0 otherwise

Then, we have:

E[U(X)] = ∫fo(x)U(x)dx = 2 ∫U(x)dx = 2 [∫(-4,0)-1dx + ∫(0,4)1dx] = 2(-4+4) = 0

Thus, U(X) is a nonzero function that satisfies E[U(X)] = 0, which shows that the family fo(x) = 2 is not complete.

ii) To show that the family N(0,0) is not complete, we need to find a nonzero function U(X) such that E[U(X)] = 0 for all e > 0. Let U(X) be defined as:

U(X) = X

Then, we have:

E[U(X)] = E[X] = ∫N(0,0)xdx = 0

Thus, U(X) is a nonzero function that satisfies E[U(X)] = 0, which shows that the family N(0,0) is not complete.

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Answer:

tanA = [tex]\frac{55}{48}[/tex]

Step-by-step explanation:

tanA = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{BC}{AC}[/tex] = [tex]\frac{55}{48}[/tex]

The cost of the film for the whole area of the figure is $73.6.

Given that,

Chris is covering a window with a decorative adhesive film to filter light.

The figure is a window in the shape of a parallelogram.

We have to find the area of the figure.

Area of parallelogram = Base × Height

Area = 8 × 4 = 32 feet²

Cost for the film per square foot = $2.3

Cost of the film for 32 square foot = 32 × $2.3 = $73.6

Hence the cost of the film is $73.6.

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The bicycle travels 12 feet in 3 seconds.

This can be found by integrating the velocity function v(t) over the interval [0,3]: ∫4t dt = 2t² evaluated at t=3.

The velocity function v(t) gives the rate of change of distance with respect to time, so to find the total distance traveled over a given time interval, we need to integrate v(t) over that interval.

In this case, we want to find the distance traveled in 3 seconds, so we integrate v(t) from t=0 to t=3: ∫4t dt = 2t² evaluated at t=3 gives us the total distance traveled, which is 12 feet. This means that after 3 seconds, the bike has traveled 12 feet from its starting point.

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The Laplace transform of a+bt+c is (a/s) + (b/s^2) + (c/s). The Laplace transform of A cos(t+Bsin(t)) is (s/(s^2+B^2)) (A cos(φ) + (B/sin(φ)) A sin(φ)), where φ = arctan(B/s).

For a function f(t), the Laplace transform F(s) is defined as ∫[0, ∞) e^(-st) f(t) dt, where s is a complex number.

To find the Laplace transform of a+bt+c, we use linearity and the Laplace transform of elementary functions:

L{a+bt+c} = L{a} + L{bt} + L{c} = a/s + bL{t} + c/s = a/s + b/s^2 + c/s

Therefore, the Laplace transform of a+bt+c is (a/s) + (b/s^2) + (c/s).

B. To find the Laplace transform of A cos(t+Bsin(t)), we use the following identity:

cos(t + Bsin(t)) = cos(t)cos(Bsin(t)) - sin(t)sin(Bsin(t))

Then, we apply the Laplace transform to both sides and use linearity and the Laplace transform of elementary functions:

L{cos(t + Bsin(t))} = L{cos(t)cos(Bsin(t))} - L{sin(t)sin(Bsin(t))}

Using the formula L{cos(at)} = s/(s^2 + a^2), we get:

L{cos(t + Bsin(t))} = (s/(s^2+B^2)) L{cos(t)} - (s/(s^2+B^2)) L{sin(t)}

Using the formula L{sin(at)} = a/(s^2 + a^2), we get:

L{cos(t + Bsin(t))} = (s/(s^2+B^2)) (1/s) - (B/(s^2+B^2)) (1/s)

Simplifying, we get:

L{cos(t + Bsin(t))} = (s/(s^2+B^2)) (A cos(φ) + (B/sin(φ)) A sin(φ)), where φ = arctan(B/s)

Therefore, the Laplace transform of A cos(t+Bsin(t)) is (s/(s^2+B^2)) (A cos(φ) + (B/sin(φ)) A sin(φ)), where φ = arctan(B/s).

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The probability of x ≤ 8 successes in 10 trials of a binomial experiment with probability of success p = 0.6 is option (c) 0.954.

We can use the cumulative distribution function (CDF) of the binomial distribution to calculate the probability of getting x ≤ 8 successes in 10 trials with a probability of success p = 0.6.

The CDF gives the probability of getting at most x successes in n trials, and is given by the formula

F(x) = Σi=0 to x (n choose i) p^i (1-p)^(n-i)

where (n choose i) represents the binomial coefficient, and is given by

(n choose i) = n! / (i! (n-i)!)

Plugging in the values, we get

F(8) = Σi=0 to 8 (10 choose i) 0.6^i (1-0.6)^(10-i)

Using a calculator or a software program, we can calculate this as

F(8) = 0.9544

So the probability of getting x ≤ 8 successes is 0.9544.

Therefore, the answer is (c) 0.954.

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The overall reliability of the system through time t is approximately 0.370.

You have a system with four components and their reliabilities through time t are given as follows:

1. Component 1: 0.80
2. Component 2: 0.66
3. Component 3: 0.78
4. Component 4: 0.89

To find the overall reliability of the system, you'll need to multiply the reliabilities of each individual component:

Overall Reliability = Component 1 Reliability × Component 2 Reliability × Component 3 Reliability × Component 4 Reliability

Step-by-step calculation:

Overall Reliability = 0.80 × 0.66 × 0.78 × 0.89

Now, multiply the given reliabilities:

Overall Reliability ≈ 0.370

So, the overall reliability of the system through time t is approximately 0.370.

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The statement "integration of [f(x)⋅dx] equals one" should be replaced with "the sum of all the probabilities equals one for a discrete random variable.

You are correct that the statement "integration of [f(x)⋅dx] equals one" may be misleading.

So, the statement "integration of [f(x)⋅dx] equals one" should be replaced with "the sum of all the probabilities equals one for a discrete random variable.

The integral of the pdf over the entire range equals one for a continuous random variable."

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Based on the information provided, the hydrocarbon that fits these criteria is likely to be octane, with a molecular formula of C8H18. The molecular ion with an m/z value of 128 indicates that the molecule has lost one electron, resulting in a positive charge.

The base peak with an m/z value of 43 is likely due to the fragmentation of a methyl group (CH3) from the parent molecule. The significant peaks with m/z values of 57, 71, and 85 may correspond to other fragment ions resulting from the breakdown of the octane molecule.
Based on the given m/z values, the hydrocarbon you are looking for has a molecular ion with an m/z value of 128, a base peak with an m/z value of 43, and significant peaks with m/z values of 57, 71, and 85. The hydrocarbon is likely an alkane, alkene, or alkyne. To determine the exact compound, further information such as the chemical formula or structure would be needed.

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Answer:

57.99

Step-by-step explanation:

Did you mean rounded to 1 decimal place?  That would be 58.

The steady state vector ¯ q for the given stochastic matrix p such that p ¯ q = ¯ q is q1 = 3q2, where q2 can be any real number.

The steady state vector, denoted as ¯ q, for the given stochastic matrix p, such that p ¯ q = ¯ q, can be found by solving for the eigenvector corresponding to the eigenvalue of 1 for matrix p.

Start with the given stochastic matrix p:

p = [ 0.9 0.3 ]

[ 0.1 0.7 ]

Next, subtract the identity matrix I from p, where I is a 2x2 identity matrix:

p - I = [ 0.9 - 1 0.3 ]

[ 0.1 0.7 - 1 ]

Find the eigenvalues of (p - I) by solving the characteristic equation det(p - I) = 0:

| 0.9 - 1 0.3 | | -0.1 0.3 | | -0.1 * (0.7 - 1) - 0.3 * 0.1 | | -0.1 - 0.03 | | -0.13 |

| 0.1 0.7 - 1 | = | 0.1 -0.3 | = | 0.1 * 0.1 - (0.7 - 1) * 0.3 | = | 0.1 + 0.27 | = | 0.37 |

Therefore, the eigenvalues of (p - I) are -0.13 and 0.37.

Solve for the eigenvector corresponding to the eigenvalue of 1. Substitute λ = 1 into (p - I) ¯ q = 0:

(p - I) ¯ q = [ -0.1 0.3 ] [ q1 ] = [ 0 ]

[ 0.1 -0.3 ] [ q2 ] [ 0 ]

This results in the following system of linear equations:

-0.1q1 + 0.3q2 = 0

0.1q1 - 0.3q2 = 0

Solve the system of linear equations to obtain the eigenvector ¯ q:

By substituting q1 = 3q2 into the first equation, we get:

-0.1(3q2) + 0.3q2 = 0

-0.3q2 + 0.3q2 = 0

0 = 0

This shows that the system of equations is dependent and has infinitely many solutions. We can choose any value for q2 and calculate the corresponding q1 using q1 = 3q2.

Therefore, the steady state vector ¯ q is given by:

q1 = 3q2

q2 = any real number

In conclusion, the steady state vector ¯ q for the given stochastic matrix p such that p ¯ q = ¯ q is q1 = 3q2, where q2 can be any real number.

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The tangential component of the acceleration vector is (4t / (1 + 4t² + 9)[tex]^{1/2}[/tex])i + (8t²/ (1 + 4t² + 9)[tex]^{1/2}[/tex])j + (12t / (1 + 4t² + 9)[tex]^{1/2}[/tex])k, and the normal component of the acceleration vector is -4t / (1 + 4t² + 9)[tex]^{1/2}[/tex] * i + (2 - 8t² / (1 + 4t² + 9)[tex]^{1/2}[/tex])j - 12t / (1 + 4t² + 9)[tex]^{1/2}[/tex] * k.

To find the tangential and normal components of the acceleration vector, we first need to find the acceleration vector itself by taking the second derivative of the position vector r(t):

r(t) = ti + [tex]t^{2j}[/tex] + 3tk

v(t) = dr/dt = i + 2tj + 3k

a(t) = dv/dt = 2j

The acceleration vector is a(t) = 2j. This means that the acceleration is entirely in the y-direction, and there is no acceleration in the x- or z-directions.

The tangential component of the acceleration vector, a_T, is the component of the acceleration vector that is parallel to the velocity vector v(t). Since the velocity vector is i + 2tj + 3k and the acceleration vector is 2j, the tangential component is:

a_T = (a(t) · v(t) / ||v(t)||[tex]^{2}[/tex]) * v(t) = (0 + 4t + 0) / [tex](1 + 4t^{2} + 9)^{1/2}[/tex] * (i + 2tj + 3k)

Simplifying this expression, we get:

a_T = (4t / [tex](1 + 4t^{2} + 9 ^{1/2} )[/tex]i + (8t^2 / (1 + 4t^2 + 9)^(1/2))j + (12t / (1 + 4t^2 + 9)[tex]^{1/2}[/tex])k

The normal component of the acceleration vector, a_N, is the component of the acceleration vector that is perpendicular to the velocity vector. Since the acceleration vector is entirely in the y-direction, the normal component is:

a_N = a(t) - a_T = -4t / (1 + 4t² + 9)[tex]^{1/2}[/tex]* i + (2 - 8t² / (1 + 4t²+ 9)[tex]^{1/2}[/tex])j - 12t / (1 + 4t² + 9)[tex]^{1/2}[/tex]* k

Therefore, the tangential component of the acceleration vector is (4t / (1 + 4t² + 9)[tex]^{1/2}[/tex])i + (8t²/ (1 + 4t² + 9)[tex]^{1/2}[/tex])j + (12t / (1 + 4t² + 9)[tex]^{1/2}[/tex])k, and the normal component of the acceleration vector is -4t / (1 + 4t² + 9)[tex]^{1/2}[/tex] * i + (2 - 8t² / (1 + 4t² + 9)[tex]^{1/2}[/tex])j - 12t / (1 + 4t² + 9)[tex]^{1/2}[/tex] * k.

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The number which a value, 20 percent less than 120 is one-third more than is 72

A percentage is an expression of the ratio between quantities, expressed as a fraction with a denominator of 100.

The quantity 20 percent less than 120 can be expressed as follows;

20 percent less than 120 = ((100 - 20)/100) × 120 = 96

One-third more than a number = The number + (The number)/3

Let x represent the number, we get;

One-third more than the number = x + x/3

x + x/3 = 96

x·(1 + 1/3) = 96

4·x/3 = 96

x = 96 × 3/4 = 72

Therefore, 20 percent less than 120 is one-third more than 72

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