solve 5 cos ( 2 x ) = 4 for the smallest positive solution. give your answer accurate to at least two decimal places.

If "cost-function" is "C(Q) = 50 + Q - 10Q² + 2Q³" , then at 10 units of  the output, average total cost curve (a) is in the increasing stage.

A "Function" is defined as a mathematical object that maps an input value or set of input values to a corresponding output value or set of output values.

The "Cost-Function" for "Q" quantities is written as : C(Q) = 50 + Q - 10Q² + 2Q³;

To find the average total cost curve at 10 units, we substitute the value of Q from 1 to 10,

The average total cost function is "Cost Function" divided by the "Quantity";

⇒ Average Total Cost Function(ATC) = (50 + Q - 10Q² + 2Q³)/Q,

For Q = 1, ATC = (50 + 1 - 10(1)² + 2(1)³)/1 = 43 ,

For Q = 2, ATC = (50 + 2 - 10(2)² + 2(2)³)/2 = 28/2 = 14,

For Q = 3, ATC = (50 + 2 - 10(3)² + 2(3)³)/3 = 17/3 = 5.67,

For Q = 4, ATC = (50 + 2 - 10(4)² + 2(4)³)/4 = 22/4 = 5.5,

For Q = 5, ATC = (50 + 2 - 10(5)² + 2(5)³)/5 = 55/5 = 11,

For Q = 6, ATC = (50 + 2 - 10(6)² + 2(6)³)/6 = 128/6 = 21.33,

For Q = 7, ATC = (50 + 2 - 10(7)² + 2(7)³)/7 = 253/7 = 36.14,

For Q = 8, ATC = (50 + 2 - 10(8)² + 2(8)³)/8 = 442/8 = 55.25,

For Q = 9, ATC = (50 + 2 - 10(9)² + 2(9)³)/9 = 707/9 = 78.56,

For Q = 10, ATC = (50 + 2 - 10(10)² + 2(10)³)/10 = 1060/10 = 106,

From the above values, from units : "1 to 4" , the "average-total-cost" is decreasing and from the unit 5, the average total cost is increasing.

So, at "10 units" of output, average total cost curve is increasing stage.

Therefore, the correct option is (a).

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The given question is incomplete, the complete question is

Suppose the cost function is C(Q) = 50 + Q - 10Q² + 2Q³. At 10 units of output, the average total cost curve

(a) is in the increasing stage.

(b) is in the declining stage.

(c) is at the minimum level.

(d) is at the maximum level.

Answer:

y = 3x + 2

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 2, - 4) and (x₂, y₂ ) = (0, 2) ← 2 points on the line

m = [tex]\frac{2-(-4)}{0-(-2)}[/tex] = [tex]\frac{2+4}{0+2}[/tex] = [tex]\frac{6}{2}[/tex] = 3

the line crosses the y- axis at (0, 2 ) ⇒ c = 2

y = 3x + 2 ← equation of line

This equation gives the distance between x and -6, which is 2, and has two solutions, x = -8 and x = -4, as desired.

The solution set {-8, -4} corresponds to the x-intercepts of the graph of the absolute value function:

f(x) = |x + 6|

To see why, notice that the graph of f(x) is a V-shaped graph that intersects the x-axis at -8 and -4, as shown in the following sketch:

             |

         .   |   .

             |

     .       |       .

             |

------|-------|-------|------> x-axis

    -8      -4       0

At x = -8 and x = -4, the function f(x) takes the value zero, which is the same as the distance between these points and the vertical line x = -6. Therefore, an equation that has the solution set {-8, -4} and corresponds to the graph shown above is:

| x + 6 | = 2

Therefore, This equation gives the distance between x and -6, which is 2, and has two solutions, x = -8 and x = -4, as desired.

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The orthogonal complement of W⊥ of W is { [z - x, y2, y3] : x, y2, y3 ∈ R }. The basis for W⊥ is {[1, 0, 0, 1], [0, 1, 0, 0]}

To find the orthogonal complement of W, we need to find all vectors in R^3 that are orthogonal (i.e., perpendicular) to every vector in W.

Let's first find a basis for W.

W consists of all vectors [y1, y2, y3] that satisfy the equation x + y1 - z = 0. This can be rewritten as:

y1 = z - x

So, any vector in W has the form [z - x, y2, y3].

We can write this in a matrix form as:

W = { [z - x, y2, y3] : x, y2, y3 ∈ R }

Now, we want to find a basis for the orthogonal complement of W, denoted by W⊥. This consists of all vectors that are orthogonal to every vector in W.

Let v be a vector in W⊥. Then, v is orthogonal to every vector in W, so v is orthogonal to [z - x, y2, y3] for all x, y2, y3. This means that the dot product of v and [z - x, y2, y3] is zero for all x, y2, y3.

Taking the dot product, we get:

v · [z - x, y2, y3] = (z - x)v1 + y2v2 + y3v3 = 0

This is a linear equation in the variables x, y2, and y3. We can rewrite it as a matrix equation:

[z, 1, 0] · [v1, -v1, v2, v3] · [x, y2, y3, 1]ᵀ = 0

where [v1, -v1, v2, v3] is a 1 × 4 matrix that we can use to take the dot product. The last entry of the vector [x, y2, y3, 1]ᵀ is a dummy variable that we introduce to write the equation in matrix form.

We can rewrite this equation as:

[v1, -v1, v2, v3] · [x, y2, y3, z] = 0

This means that [v1, -v1, v2, v3] is orthogonal to every vector of the form [x, y2, y3, z].

In other words, the vector [v1, -v1, v2, v3] is in the nullspace of the following matrix:

[ 1 0 0 -1 ]

[ 0 1 0 0 ]

[ 0 0 1 0 ]

We can find a basis for the nullspace of this matrix by row-reducing it to echelon form:

[ 1 0 0 -1 ]

[ 0 1 0 0 ]

[ 0 0 1 0 ]

The matrix is already in echelon form, so we can see that the nullspace is spanned by the vector [1, 0, 0, 1] and [0, 1, 0, 0].

Therefore, a basis for W⊥ is {[1, 0, 0, 1], [0, 1, 0, 0]}.

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The order of increasing radius is Sr²⁺, Rb⁺, Br⁻.

The radius of atoms and ions depends on the number of electron shells and the effective nuclear charge. In this case, all three species have the same number of electron shells (n = 5). However, their effective nuclear charges differ due to their varying numbers of protons and electrons.

Sr²⁺ has the smallest radius because it has the highest effective nuclear charge (38 protons, 36 electrons).

which resulting in a stronger attraction between the nucleus and electrons, which contracts the ion. Rb⁺ has a slightly larger radius as it has a lower effective nuclear charge (37 protons, 36 electrons), and Br⁻ has the largest radius due to its lower effective nuclear charge (35 protons, 36 electrons) and additional repulsion between its electrons.

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Complete question:

arrange these atoms and ions in order of increasing radius: rb⁺ , sr²⁺ , br⁻ .

Answer:

B

Step-by-step explanation:

Inequality operators with a line under them (such as [tex]\le[/tex] ) are represented on a number line by a filled-in dot. They include the endpoint of the inequality.

Using this information, we can narrow down the options to B and D.

Next, we can choose one of them based on the direction of the inequality operator. We can see that we have a "less than" (or equal to) inequality, so that means that the shading from the dot should be going to the left on the number line because numbers get smaller to the left. Therefore, we know that B is the correct answer.

Answer: B

Step-by-step explanation:

x ≤ 3, so it can't be C or D because those are both x being greater than three

Because x is less than or equal to 3, 3 is one of the solutions to this problem making B the answer

If you are stuck on a problem like this,  find a random point and try it

Remember:

filled dot  - less than/greater than, or equal to

Not filled dot - less than/greater than

Answer:

$3088.75

Step-by-step explanation:

4.25%= .0425
1750 x .0425 = 74.375

74.375 x 18 = 1338.75

1750+1338.75=3088.75

Answer:

f(3)=19

Step-by-step explanation:

f(x)=f(3), so x=3

f(x) has three function depend on x, When x=3 it belongs to the interval x>=3 so we use the function f(x)=5x+4 and x=3

=> f(3)=5*3+4=19

The answer to the above questions can be framed as, (a) Elements of C: {1, 10, 19, 28, 37}, Elements of D: {1, 4, 7, 10, 13}, (b) C is not a subset of D, and (c) D is not a subset of C.

a) Different elements of set C can be obtained by adding multiples of 9 to any number that gives a remainder of 1 when divided by 7. For example, 1, 10, 19, 28, and 37 are five different elements of set C.

Similarly, different elements of set D can be obtained by adding multiples of 3 to any number that gives a remainder of 1 when divided by 2. For example, 1, 4, 7, 10, and 13 are five different elements of set D.

(b) C is not a subset of D, and D is not a subset of C. To see why, consider the number 10. 10 is an element of C since it gives a remainder of 1 when divided by 7. However, 10 is not an element of D since it gives a remainder of 2 when divided by 3.

Similarly, the number 4 is an element of D since it gives a remainder of 1 when divided by 2, but 4 is not an element of C since it gives a remainder of 4 when divided by 7.

(c) Since C and D have no elements in common, and neither is a subset of the other, C is not a subset of D, and D is not a subset of C.

Therefore, D is not a subset of C. To see why, consider the number 4, which is an element of D. However, 4 is not an element of C since it gives a remainder of 4 when divided by 7.

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Answer:

Irrational

Step-by-step explanation:

There number does not flow in a pattern but have a negative number

For a 99% confidence level, the sample size is required 265.

For a 90% confidence level, the sample size is required 79.

We can use the following formula to calculate the sample size needed to estimate the population means with a specific level of confidence and margin of error:

[tex]n =\frac{ (Z^2 * (sigma)^2)}{E^{2} }[/tex]

where:

The sample size is denoted by n.

Z is the Z-score associated with the required level of confidence.

sigma is the population's standard deviation

E represents the margin of error.

We have the following for a 99% confidence level and a margin of error of +/- 20 with a standard deviation of 120:

Z = 2.58 (from the ordinary normal distribution table, with 99% confidence)

(Sigma)σ = 120

E = 20

[tex]n = \frac{2.58^2 * 120^2}{20^2} = 264.8352[/tex]

Rounding up to the nearest integer, the sample size required is 265.

For a 90% confidence level and a margin of error of +/- 20 with a standard deviation of 120, we have:

Z = 1.645 (from the standard normal distribution table for a 90% confidence level)

σ = 120

E = 20

[tex]n = (\frac{1.645^2 * 120^2}{ 20^2} )[/tex]

n = 78.096

Rounding up to the nearest integer, the sample size required is 79.

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Complete question:

If you want to be 99% confident of estimating the population mean to within a sampling error of +/- 20 and the standard deviation is assumed to be 120, what sample size is required? Round to the correct integer. The sample size required is ? If you want to be 90% confident of estimating the population mean to within a sampling error of +/- 20 and the standard deviation is assumed to be 120, what sample size is required? Round to the correct integer. The sample size required is ?

The main difference between the uniform distribution and the normal distribution is that the uniform distribution has the same probability for every outcome, while the normal distribution has higher probabilities for outcomes centered around the mean

The uniform distribution is a probability distribution that assigns equal probabilities to every possible outcome within a specific range. In other words, each outcome has the same likelihood of occurring, and the distribution is flat or rectangular-shaped. For example, if you roll a fair six-sided die, the probability of getting any one of the six numbers is 1/6, since each number is equally likely to occur. The uniform distribution is commonly used in situations where all outcomes are equally likely, such as in random number generation or selecting a winner from a group of contestants.

On the other hand, the normal distribution (also known as the Gaussian distribution) is a continuous probability distribution that describes the behavior of many natural phenomena, such as the heights of people or the weights of objects. It is characterized by a bell-shaped curve that is symmetric around its mean value, with the highest probability density at the mean and decreasing probability density as you move away from the mean in either direction. The normal distribution is important in statistics because it is often used to model real-world data, and many statistical tests and techniques assume that the data follows a normal distribution.

In summary, the uniform distribution is characterized by equal probabilities for all outcomes, while the normal distribution is characterized by a bell-shaped curve that assigns higher probabilities to outcomes near the mean and lower probabilities to outcomes further away from the mean.

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The global maxima and minima of the function f(x, y) = xy on the curve x² + xy + y² = 3 can be found using Lagrange multipliers. The global maxima is at (1,1) with a value of 1, and the global minima is at (-1,-1) with a value of 1.

To find the global maxima and minima, first, set up the Lagrange multiplier equation: ∇f(x, y) = λ∇g(x, y), where f(x, y) = xy, g(x, y) = x² + xy + y² - 3, and λ is the Lagrange multiplier. Then, find the gradient vectors ∇f(x, y) = (y, x) and ∇g(x, y) = (2x + y, x + 2y). The equation becomes (y, x) = λ(2x + y, x + 2y).

Next, solve for x and y in terms of λ: y = λ(2x + y) and x = λ(x + 2y). By solving this system of equations, we get two solutions: (1, 1) and (-1, -1). Plug these points into the function f(x, y) = xy to find the function values.

For both points, the function value is 1. Therefore, the global maxima is at (1, 1) with a value of 1, and the global minima is at (-1, -1) with a value of 1.

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The probability that a randomly selected point within the circle falls in the red-shaded square is 0.0625

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

Red square of length 1

White square of length 4

The areas of the above squares are

Red square = 1^2 = 1

White square = 4^2 = 16

The probability is then calculated as

P = Red square/White square

So, we have

P = 1/16

Evaluate

P = 0.0625

Hence, the probability is 0.0625

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The earnings per share for Catena's Marketing Company at the end of the current year is $7.32 per share.

To calculate the earnings per share for Catena's Marketing Company, we need to know the total number of shares outstanding at the end of the year. The problem states that 500 additional shares were issued at the end of the year, bringing the total to 930 shares.

To calculate the earnings per share, we divide the net income by the total number of shares outstanding. Using the given information, we get:

Earnings per share = Net income / Total shares outstanding

Earnings per share = $6,808 / 930

Earnings per share = $7.32 per share

This means that for each share of common stock outstanding, the company earned $7.32 in net income during the year. It's important to note that earnings per share is a widely used metric in evaluating a company's financial performance, and is often used as a basis for determining a company's stock price.

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Complete question is:

Catena's Marketing Company has the following adjusted trial balance at the end of the current year. Cash dividends of $665 were declared at the end of the year, and 500 additional shares of common stock ($0.10 par value per share) were issued at the end of the year for $3,260 in cash (for a total at the end of the year of 930 shares). These effects are included below:

CATENA’S MARKETING COMPANY

Income Statement

At the end of current year

Operating revenues:

Sales revenue $40,110

Interest revenue 114

Rent revenue 835

Total operating revenues 41,059

Operating expenses:

Wages expense 20,200

Utilities expense 408

Insurance expense 813

Rent expense 9,140

Depreciation expense 1,940

Total operating expenses 32,501

Operating Income: 8,558

Other item:

Pretax income 8,558

Income taxes payable 1,750

Net income $6,808

Earnings per share ?

Answer:

D.1

Step-by-step explanation:

you cannot measure distance in negatives and it talks about how many units it was moved by.

C

Reason: You have 2,2, and 3,3 now there is no 2 that can go with or that is higher and it can not be negative because it is not at the bottom its on top which is positive.

Answer:

60°

Step-by-step explanation:

I added a photo of my notes

Draw a bisector from the center of the circle and then two right triangles will be formed

Now you can find the measure of x (the sum of triangle's angles is equal to 180°):

[tex](0.5x)° + 90° + 60° = 180°[/tex]

[tex](0.5x)° = 180° - 90° - 60°[/tex]

[tex]x = 60°[/tex]

The total volume of the sculpture is 87.625 cubic units. The total volume of the solid sculpture can be calculated by adding the volume of the larger cube and the smaller cube, then subtracting the overlapping volume.

The larger cube has dimensions of 4 × 4 × 4, so its volume is 4³ = 64 cubic units. The smaller cube has dimensions of 3 × 3 × 3, so its volume is 3³ = 27 cubic units.

The smaller cube is attached to the larger cube such that one of its vertices touches the edges of the larger cube, which means that 1/8 of the smaller cube is inside the larger cube. To find the overlapping volume, we need to calculate 1/8 of the volume of the smaller cube: (1/8) × 27 = 3.375 cubic units.

Now we subtract the overlapping volume from the sum of the volumes of both cubes to find the total volume of the sculpture:

64 (larger cube) + 27 (smaller cube) - 3.375 (overlapping volume) = 87.625 cubic units.

So, the total volume of the sculpture is 87.625 cubic units.

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The gradient of the line segment AB​ is equal to 2/3.

In Mathematics and Geometry, the gradient or slope of any straight line can be determined by using the following mathematical equation;

Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)

Slope (m) = rise/run

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

By substituting the given data points into the formula for the slope of a line, we have the following;

Slope (m) = rise/run

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

Slope (m) = 4/6

Slope (m) = 2/3.

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Answer:depth = 32.5cm.

Step-by-step explanation:

The depth of the water in the tank after the pyramid is removed is 17.34 cm.

b) Supporting details:

To find the depth of the water, we need to consider the amount of water displaced by the pyramid. The weight of the water displaced by the pyramid is equal to the weight of the pyramid itself. When the pyramid is removed, the volume of water in the tank will decrease by the volume of water displaced by the pyramid. Using the formula for the volume of a cylinder and the volume of a spherical segment, we can set up an equation and solve for the depth of the water.

c) Internal link:

Learn more about buoyancy and Archimedes' principle in this article.

Step-by-step explanation:

Answer:

x = 8

Step-by-step explanation:

given the line AD is parallel to BC and intersects the other 2 sides , then it divides those sides proportionally , that is

[tex]\frac{AE}{AB}[/tex] = [tex]\frac{DE}{CD}[/tex] ( substitute values )

[tex]\frac{16}{5x +2}[/tex] = [tex]\frac{24}{63}[/tex] ( cross- multiply )

24(5x + 2) = 16 × 63 = 1008 ← distribute parenthesis on left side

120x + 48 = 1008 ( subtract 48 from both sides )

120x = 960 ( divide both sides by 120 )

x = 8

To find the position of the center of mass, we need to use the formula:

R_cm = (m1r1 + m2r2 + m3r3) / (m1 + m2 + m3)

Since each particle has a unit mass, the formula simplifies to:

R_cm = (r1 + r2 + r3) / 3

Substituting the given values, we get:

R_cm = (i+j + j+k + k+i+j+k) / 3
R_cm = (2i+2j+2k) / 3

So the position of the center of mass is (2/3)i + (2/3)j + (2/3)k.

To find the velocity of the center of mass, we need to use the formula:

V_cm = (m1v1 + m2v2 + m3v3) / (m1 + m2 + m3)

Since each particle has a unit mass, the formula simplifies to:

V_cm = (v1 + v2 + v3) / 3

Substituting the given values, we get:

V_cm = (2i + j + i+j+k) / 3
V_cm = (4i + 2j + k) / 3

So the velocity of the center of mass is (4/3)i + (2/3)j + (1/3)k.

To find the linear momentum of the system, we need to add up the momentum of each particle. The formula for momentum is:

p = mv

Since each particle has a unit mass, the formula simplifies to:

p = v

Substituting the given values, we get:

p1 = 2i
p2 = j
p3 = i+j+k

Adding them up, we get:

p = p1 + p2 + p3
p = 2i + j + i+j+k
p = 2i + 2j + k

So the linear momentum of the system is 2i + 2j + k.

Let's find the position and velocity of the center of mass and the linear momentum of the system for the given three particles with unit mass, positions, and velocities.

Step 1: Calculate the position of the center of mass.
To do this, use the formula R_cm = (r1 + r2 + r3) / 3.
R_cm = (i + j + j + k + k) / 3
R_cm = (i + 2j + 2k) / 3

Step 2: Calculate the velocity of the center of mass.
Use the formula V_cm = (v1 + v2 + v3) / 3.
V_cm = (2i + j + i + j + k) / 3
V_cm = (3i + 2j + k) / 3

Step 3: Calculate the linear momentum of the system.
Use the formula P = m * V_cm, where m = 1 (unit mass).
P = 1 * (3i + 2j + k)
P = 3i + 2j + k

So, the position of the center of mass is R_cm = (i + 2j + 2k) / 3, the velocity of the center of mass is V_cm = (3i + 2j + k) / 3, and the linear momentum of the system is P = 3i + 2j + k.

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Answer:

7 or 8 hours

Step-by-step explanation:

Answer:

{-5,17/5} {-2,4}

Step-by-step explanation:

3-2a<13

subtract both sides by 3  -2a<10

divided both sides by -2 A<5

5a<17

divided both sides by 5 17/5

that is the first solution set.

2-6y<14

subrace 2 from both sides -6y<12

dived -6 from both sides y<-2

1<21-5y

-21 from both sides -20<-5y

divide both sides by -5 4<y

Answer:

-5 < a < 17/5

-2 < y < 4

Step-by-step explanation:

a.)

3 - 2a < 13

-2a < 10

a > -5

5a < 17

a < 17/5

-5 < a < 17/5

b.)

2 - 6y < 14

-6y < 12

y > -2

1 < 21 - 5y

-20 < -5y

-20/-5 > y

y < 4

-2 < y < 4

Therefore, the quadratic polynomial with sum of zeroes as -1 is. [tex]x^2 - x[/tex].

(i) For the quadratic polynomial with sum of zeroes as -1, let the zeroes be a and b. Then, we know that a + b = -1.

We also know that the product of the zeroes of a quadratic polynomial [tex]ax^2 + bx + c[/tex] is given by c/a. So, we need to find c/a = ab such that a + b = -1.

Let's try to solve this using substitution. We can write b = -a - 1 from the equation a + b = -1. Substituting this in the expression ab, we get:

[tex]c/a = ab = a(-a - 1) = -a^2 - a[/tex]

Now, we can write the quadratic polynomial in the form ax^2 + bx + c as:

[tex]ax^2 + bx + c = a(x - (-a))(x - (-a - 1)) = a(x + a)(x + a + 1)[/tex]

Expanding this expression, we get:

[tex]ax^2 + bx + c = a(x^2 + (2a + 1)x + a^2 + a)[/tex]

Comparing the coefficients with the standard form of a quadratic polynomial [tex]ax^2 + bx + c[/tex], we get:

[tex]a = 1, b = 2a + 1 = -1, c = a^2 + a = 0[/tex]

Therefore, the quadratic polynomial with sum of zeroes as -1 is [tex]x^2 - x[/tex].

(ii) For the quadratic polynomial with zeroes √2, √2, and 1/31, let the zeroes be a, b, and c. Then, we know that a + b + c = 2√2 + 1/31, and [tex]ab + ac + bc = 2.[/tex]

Since we have two equal zeroes (both √2), we know that the quadratic polynomial must have a factor of (x - √2)^2. So, we can write the quadratic polynomial in the form:

[tex]k(x - √2)^2(x - c) = k(x^3 - (2√2 + c)x^2 + 2√2cx - 2c√2)[/tex]

where k is some constant. We can find the value of k by setting the coefficient of x^3 to 1:

[tex]k = 1/((√2 - c)^2)[/tex]

Now, we can expand the expression for the quadratic polynomial and equate the coefficients with the given values:

[tex]a + b + c = 2\sqrt2 + 1/31 -- > c\\ = 2\sqrt2 + 1/31 - a - bab + ac + bc \\= 2 -- > 2a^2b + 2a^2c + 2ab^2 + 2b^2c + 2ac^2 + 2bc^2 \\= k(-2c\sqrt2) = -2\sqrt2/((\sqrt2 - c)^2)[/tex]

Substituting the expression for c in the second equation, we get:

[tex]2a^2b + 2a^2c + 2ab^2 + 2b^2c + 2ac^2 + 2bc^2 \\= -2\sqrt2/((√2 - 2\sqrt2 - 1/31 + a + b)^2)2a^2b + 2a^2(2\sqrt2 + 1/31 - a - b) + 2ab^2 + 2b^2(2\sqrt2 + 1/31 - a - b) + 2a(2\sqrt2[/tex]

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Answer/Step-by-step explanation:

1. Explain: Doing problems like 2a and 2b (mult and div of rational expressions) is just like mult and div of fractions (rational numbers). You multiply top×top straight across (numerator) and bottom×bottom (denominator). If there are common factors on top and bottom, you can "cancel" them (this is actually dividing)

For division, the same process works as for fractions. Turn the division into a multiplication by using Keep-Change-Flip. And then proceed as described for multiplication.

You can cancel common factors. For algebraic expressions, you need to factor some expressions so that you can see what can "cancel".

For work, see image.

There is a "rational number" (fractions) example beside the work for 2a and 2b to show how the problems are done the same way.

Answer:

11

Step-by-step explanation:

1.frist off multiply 66pie to get your actual area

2.use formula pie.D to get your perimeter of one of the the sides top or bottom

pie.6=18....

3. then divide your total area from 1 by perimeter from 2

66pie÷pie.6 = 11

The probability of selecting a card that is divisible by 2 is 1/2

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

Number of cards = 40

Cards that is divisible by 2 = 20

using the above as a guide, we have the following:

P(Cards) = Cards that is divisible by 2/Total

So, we have

P(Cards) = 20/40

Evaluate

P(Cards) = 1/2

Hence, the probability is 1/2

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We can be 99% confident that the true population mean falls within the interval (60.47, 69.53).

To construct a 99% confidence interval estimate of the population mean (μ) given x=65, sigma=14, and n=69, we can use the formula:

CI = x ± z*(sigma / √(n))

where x is the sample mean, sigma is the population standard deviation, n is the sample size, and z is the critical value from the standard normal distribution corresponding to the desired confidence level.

For a 99% confidence level, the z-value is 2.576 (from the standard normal distribution table). Substituting the given values, we get:

CI = 65 ± 2.576*(14 / √(69))

CI = (60.47, 69.53)

This means that if we repeat the sampling process many times and construct confidence intervals in the same way, around 99% of those intervals will contain the true population mean.

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To find the union of two sets, we combine all the elements in both sets, without duplicating any elements. (a) A ∪ B = {0, 1, 2, 3, 4, 5, 6} (b) A ∩ B = {3}  (c) A − B = {1, 2, 4, 5} (d) B − A = {0, 6} (e) C ∪ (B − A) = {0, 2, 3, 4, 6, 7}  (f) (C ∪ B) − A = {0, 6, 7}

To find the intersection of two sets, we find the elements that are common to both sets. A − B = {1, 2, 4, 5}

To find the set difference A − B, we remove all the elements in B from A.  B − A = {0, 6} To find the set difference B − A, we remove all the elements in A from B.  C ∪ (B − A) = {0, 2, 3, 4, 6, 7} First, we find the set difference B − A, which is {0, 6}.

Then, we find the union of C and {0, 6}, which is {0, 2, 4, 6, 7}. (C ∪ B) − A = {0, 6, 7} First, we find the union of C and B, which is {0, 2, 3, 4, 6, 7}. Then, we remove all the elements in A from this set to get the result.

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