a driveway consists of two rectangles one rectangle is 80 ft long and 15 ft wide the other is 30 ft long and 30 ft wide what is the area of the driveway ​

During the oil crisis, Americans took various measures to reduce their dependency on oil from the Middle East. One of the key steps they took was to increase fuel efficiency standards for cars and trucks.

This helped to reduce the amount of oil needed to power vehicles. Additionally, they started to produce more of their own oil by opening up new oil fields and investing in alternative energy sources such as wind and solar power.

They also implemented policies to encourage conservation and reduce wasteful energy consumption. However, they did not decrease the price of oil and gas by four times, nor did they allow people to buy as much gas as they wanted.

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Answer:The answer is B

Step-by-step explanation:

A group of 8 friends went to lunch and spent a total of $76, which included the food bill and a tip of $16. They decided to split the bill and tip evenly among themselves. Which equations and solutions describe the situation? Select two options. The equation StartFraction 1 over 8 EndFraction (x + 16) = StartFraction 76 over 8 EndFraction represents the situation, where x is the food bill. The equation StartFraction 1 over 8 EndFraction (x + 16) = 76 represents the situation, where x is the food bill. The solution x = 60 represents the total food bill. The solution x = 60 represents each friend’s share of the food bill and tip. The equation 8 (x + 16) = 76 represents the situation, where x is the food bill.

Triangle A′B′C′ is a dilation of ​triangle ABC​ about point P with a scale factor of 1/2. The dilation is a reduction.

A dilation is a transformation that changes the size of a figure, but not its shape. It can be either an enlargement or a reduction depending on the value of the scale factor.

If the scale factor is greater than 1, then the image will be larger than the original figure. This is called an enlargement.

If the scale factor is between 0 and 1, then the image will be smaller than the original figure. This is called a reduction.

In this case, the scale factor is 1/2, which is less than 1. Therefore, the image of triangle ABC is smaller than the original triangle, and the dilation is a reduction.

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A line segment of length 15 cm at a bearing of 50° from P to locate the position of Q on the drawing. Use the Law of Cosines the distance d between Q and L, which is approximately 71.2 km. Use the Law of Sines the angle x opposite d, which is approximately 29.5°, giving the bearing of Q from L.

Using the given scale of 1 cm represents 3 km, we can draw a line segment of length 15 cm (since 5 km/h x 12 h = 60 km) on a bearing of 50° from P to locate the position of Q. The point Q can be marked on the drawing using the x tool.

We can use the Law of Cosines to find the distance d between Q and L. Let a = 60 km (distance from P to Q), b = 36 km (distance from P to L), and C = 130° (the angle between a and b, which is equal to the sum of the angles at Q and L). Then

d² = a² + b² - 2ab cos(C)

d² = (60)² + (36)² - 2(60)(36)cos(130°)

d ≈ 71.2 km

Therefore, the distance of port Q from lighthouse L is approximately 71.2 km.

We can use the Law of Sines to find the angle x opposite the distance d between Q and L. Let a = 60 km (distance from P to Q), b = 36 km (distance from P to L), and sin(A) = sin(130°)/d. Then

sin(x)/60 = sin(130°)/d

sin(x) = (60/d)sin(130°)

x ≈ 29.5°

Therefore, the bearing of port Q from lighthouse L is approximately 29.5°.

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The amount of penny that you should receive from your friend after the seventh shoveling job would be = 2,187 pennies.

To calculate the number of penny that you will receive after the seventh job the following is carried out.

The agreement stated that the money would be tripled for each completed shoveling job.

That is for 2 jobs = 3×3 = 9

3 jobs = 3×3×3 = 27

7 jobs = 3×3×3×3×3×3×3

= 2,187 pennies.

Therefore, the 2,187 pennies would be received from your friend after the seventh shoveling job.

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The solutions of the equation are y = (-3/5)x - 59/5 and x = (-5/3)y - 59/3

To solve for one variable in terms of the other, we can rearrange the equation to isolate one of the variables. For example, solving for y in terms of x:

3x + 5y = -59

5y = -3x - 59

y = (-3/5)x - 59/5

So the solution of the equation is:

y = (-3/5)x - 59/5

Alternatively, we could solve for x in terms of y:

3x + 5y = -59

3x = -5y - 59

x = (-5/3)y - 59/3

So another possible solution of the equation is:

x = (-5/3)y - 59/3

Note that both solutions represent the same line in the xy-plane, since they are equivalent equations.

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Options B & C

There is an asymptote at y = 40.

There is an asymptote at x = 0.

Concept 1. Zeros of rational functions

Concept 2. Vertical asymptotes of rational functions

Concept 3. Horizontal asymptotes of rational functions

Concept 4. Transformations - vertical shift

Rational functions have zeros at values of x where the numerator is zero, while the denominator is not also zero.

[tex]f(x)=\dfrac{40x+99}{x}[/tex]

Values that make the denominator zero
Note that for the function f(x), x=0 is the only value that will make the denominator zero.

Values that make the numerator zero
To find the value that makes the numerator zero, set the numerator equal to zero, and solve for the value of x that makes it true:

[tex]40x+99=0[/tex]

[tex]40x=-99[/tex]

[tex]x=\frac{-99}{40}[/tex]

So, [tex]x=\frac{-99}{40}[/tex] is the only value that will make the numerator zero

Note that this doesn't simultaneously make the denominator zero, so [tex]x=\frac{-99}{40}[/tex] is a zero (and the only zero) of the function f(x).

Therefore, Option A is NOT a correct answer.

Rational functions have Horizontal Asymptotes if the degree of the polynomial in the numerator is less than or equal to the degree of the polynomial in the denominator.

If the Degree of the denominator is greater, the Horizontal Asymptote is at a y=0.

If the Degrees are equal, the Horizontal Asymptote is at a y-value equal to the ratio of the leading coefficients.

[tex]f(x)=\dfrac{40x+99}{x}[/tex]

Note that for f(x), the degrees of the polynomials in the numerator and denominator are both 1.  So, a horizontal asymptote does exist, and it is at a height of the ratio of the leading coefficients.

The leading coefficient of the numerator is 40, while the leading coefficient of the denominator is 1.

The ratio of the leading coefficients, 40/1, so the horizontal asymptote is y=40.

Therefore, Option B is a correct answer choice.

Rational functions have Vertical Asymptotes at values of x where the denominator is zero, while the numerator is not also zero (the opposite of finding "zeros" of the function).

Recalling the values that make the numerator and denominator zero from Concept 1:

Since x=0 doesn't also make the numerator zero, x=0 is a vertical asymptote for the function f(x).

Therefore, Option C is a correct answer choice.

Rational functions have been vertically shifted if after all the main rational function fraction, there is a number added or subtracted.

I provide an example of a different function (which I'll call g(x)) here:

[tex]g(x)=\dfrac{3}{x}+2[/tex]

Observe that the "+2" is after all of the main fraction, so the graph of 3/x would have been shifted vertically up 2 units.

This is NOT the case for the function f(x) from the question.  The "99" is part of the fraction, so it does not represent a vertical shift.

Therefore, Option D is NOT a correct answer choice.

The pattern of the data indicates a linear relationship or strong positive correlation between the average house prices and average monthly payments.

The monthly payment for a house costing $450,000 is $3,600.

A formulate connecting the average monthly payment with the average house price in slope-intercept form is y = 0.008x.

In Mathematics, a proportional relationship can be represented by this equation:

y = kx

Where:

Next, we would determine the constant of proportionality (k) as follows:

Constant of proportionality (k) = y/x

Constant of proportionality (k) = 8/1000

Constant of proportionality (k) = 1/125 or 0.008.

Therefore, a formula that connects the two variables is given by;

y = kx

y = 0.008x

When average house price (x) = $450,000, the average monthly payment (y) is given by:

y = 0.008(450,000)

y = $3,600.

In conclusion, we can logically deduce that the pattern of the data shows a linear relationship or strong positive correlation between the average house prices (x) and average monthly payments (y) because as the average house prices (x) increases, the average monthly payments (y) also increases.

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Answer:  Note that we used the table of general integration formulas to recognize that the integral of csc(x) dx is -       ln|csc(x) + cot(x)| + C.

Explanation:

To evaluate the indefinite integral of csc(x) cot(x) dx, we can use substitution.

Let u = cot(x), then du/dx = -csc^2(x) and dx = -du/csc^2(x).

Substituting these values in the integral, we get:  

∫ csc(x) cot(x) dx = ∫ -du/u = -ln|u| + C

Now substituting back u = cot(x),

we get: ∫ csc(x) cot(x) dx = -ln|cot(x)| + C

This is the final answer.

Note that we used the table of general integration formulas to recognize that the integral of csc(x) dx is -ln|csc(x) + cot(x)| + C. We then used the substitution technique and the general integration formula for ln|u| to arrive at the final answer.

To completely recharge a 1.5-volt cell, each electron in the cell must be

supplied with a minimum energy of 2.403 × 10^-19 joules.

To completely recharge a 1.5-volt cell, each electron in the cell must be

supplied with an energy greater than or equal to the potential difference of

the cell, which is 1.5 volts.

The minimum energy required to supply to each electron can be

calculated

using the formula:

E = qV

where E is the energy in joules (J), q is the charge of an electron (1.602 ×

10^-19 coulombs), and V is the potential difference in volts.

Substituting the given values, we get:

[tex]E = (1.602 × 10^-19 C) × (1.5 V)E = 2.403 × 10^-19 J[/tex]

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"The computer refused to obtain the estimates because of perfect multicollinearity caused by including all possible fourth-order terms in the regression model."

Perfect multicollinearity occurs when there is an exact linear relationship between predictor variables in a regression model. In this case, including all possible fourth-order terms in X1 and X2 resulted in perfect multicollinearity.

When there is perfect multicollinearity, it becomes impossible to calculate the regression estimates using the standard formula, as the matrix (X'X)^-1 does not exist. The presence of perfect multicollinearity creates redundancy and ambiguity in the model, making it impossible for the computer routine to obtain valid estimates.

To address this issue, the experimenter decided to ignore the levels of variable X2 and fit a fourth-order model solely in X1. By focusing on one variable and excluding the other, the problem of perfect multicollinearity was resolved, and the regression model could be estimated successfully.

In conclusion, the computer refused to obtain the estimates due to perfect multicollinearity caused by including all possible fourth-order terms in the regression model. Ignoring one variable helped overcome the issue and allowed the experimenter to fit the desired fourth-order model.

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The area of the regular figure of side length 24 cm is 1496.45 square centimeter.

The given regular figure is a hexagon.

A hexagon is a polygon with six sides and six angles.

It is a two-dimensional shape formed by connecting six straight line segments.

The side length of hexagon is 24 cm..

The formula for the area of a regular hexagon is 3√3/2 a².

Where a is the side length of hexagon.

Area =  3√3/2 a².

Plug in a value as 24:

Area = 3√3/2 ×24²

= 3√3×576/2

=2992.9/2

=1496.45 square centimeter.

Hence, the area of figure is 1496.45 square centimeter.

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Find the area of the regular figure below:​

The function used to model the monthly profit for x trinkets produced are f(x) = -4(x - 50)(x - 250). The maximum profit occurs when 150 trinkets are produced.

The quadratic function that can be used to model the monthly profit for x trinkets produced is:

f(x) = -4(x - 50)(x - 250)

This is because the function is in the form of a quadratic equation, which is y = ax² + bx + c. In this case, a = -4, b = 1200, and c = 0. When we expand and simplify the equation, we get:

f(x) = -4x² + 1200x

This equation represents a parabola with a maximum value at x = 150. Therefore, the maximum profit occurs when 150 trinkets are produced.

The other answer choices are not correct because they are not quadratic functions. For example, f(x) = (x - 50)(x - 250) is a product of linear factors, and f(x) = 28(x - 50)(x + 250) and f(x) = (x + 50)(x + 250) have a coefficient of x² that is not equal to -4.

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The measure of angle OAC if major arc AB measures 220 degrees is 110 degrees. Therefore, the correct option is C.

To find the measure of angle OAC, we need to use the central angle theorem which states that the measure of an inscribed angle is equal to half the measure of the intercepted arc.

Here, we are given that the major arc AB measures 220 degrees. So, the measure of angle AOB (the central angle) is 220 degrees.

Since angle OAC is an inscribed angle that intercepts arc AB, its measure is half the measure of arc AB.

Therefore, measure of angle OAC = (1/2) * 220 = 110 degrees.

So, the correct answer is option (c) 110.

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In a rectangle, a diagonal forms a 36° angle with a side. To find the measure of the angle between the diagonals, which lies opposite to a shorter side, follow these steps:

1. Let's denote the angle between the diagonal and the shorter side as θ (which is given as 36°). Since the rectangle has four right angles (90°), the angle between the diagonal and the longer side can be found by subtracting θ from 90°: 90° - 36° = 54°.

2. Now, consider the right-angled triangle formed by the diagonal, shorter side, and longer side of the rectangle. The angle between the diagonal and the longer side is 54°, as calculated in step 1.

3. In a right-angled triangle, the sum of the other two angles (besides the right angle) must equal 90°. Thus, the angle opposite the shorter side in this triangle (let's call it α) can be calculated as: 90° - 54° = 36°.

4. Finally, the angle between the diagonals can be found by doubling α, as the diagonals bisect each other at a right angle: 2 * 36° = 72°.

Hence, the measure of the angle between the diagonals, which lies opposite to a shorter side, is 72°.

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The cost of fencing for the semicircular statuary garden is $651.99.

Finding the circumference of the full circle:
C = πd, where d is the diameter.
C = 3.14 × 26
C ≈ 81.64 feet

Since it's a semicircular garden, dividing the circumference by 2:
Semi-circular perimeter = 81.64 ÷ 2
Semi-circular perimeter ≈ 40.82 feet

Now, Adding the diameter to the semi-circular perimeter to get the total fence length:
Total fence length = 40.82 + 26
Total fence length ≈ 66.82 feet

Then, Calculating the total cost of fencing:
Cost = Total fence length × Cost per linear foot
Cost = 66.82 × $9.75
Cost ≈ $651.99

So, the cost of fencing the semicircular statuary garden will be approximately $651.99.

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AABC is transformed onto ADEF by a dilation by a scale factor of 2, centered at the origin, followed by a reflection over the y-axis.

The sequence of transformations that will move AABC onto ADEF is a dilation by a scale factor of 2, centered at the origin, followed by a reflection over the y-axis.

Firstly, dilation is a transformation that changes the size of an object but not its shape.

The dilation factor is multiplied by each coordinate, so when the dilation is centered at the origin, the new coordinates will be twice the original coordinates.

Therefore, AABC will be enlarged to A'BC', and DEF will be enlarged to D'E'F, both with double the size.

Then, reflection is a transformation that flips an object over a line of reflection. In this case, the line of reflection is the y-axis.

When we reflect A'BC' over the y-axis, we get A''B''C'', and when we reflect D'E'F over the y-axis, we get D''E''F''.

Therefore, AABC is transformed onto ADEF by a dilation by a scale factor of 2, centered at the origin, followed by a reflection over the y-axis.

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Answer:

[tex]y = 2x + 9[/tex]

Step-by-step explanation:

It is given that the slope of the line is 2, and it passes through (-3 , 3). The equation of straight lines is y = mx + b, in which:

y = (x , y) = 3

m = slope (gradient) = 2

x = (x , y) = -3

b = y-intercept

~

Plug in the corresponding numbers to the corresponding variables:

y = mx + b

3 = (2)(-3) + b

First, multiply -3 with 2:

[tex]3 = (2)(-3) + b\\3 = (2 * -3) + b\\3 = -6 + b[/tex]

Next, isolate the variable, b. Note the equal sign, what you do to one side, you do to the other. Add 6 to both sides of the equation:

[tex]3 = b - 6\\3 (+6) = b - 6 (+6)\\b = 3 + 6\\b = 9[/tex]

Plug in 2 for slope, and 9 for y-intercept, in the given equation:

[tex]y = mx + b\\m = 2\\b = 9\\[/tex]

[tex]y = 2x + 9[/tex] is your answer.

~

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The area of the grass seed needs to cover is 38.625 m².

What is the area of the rectangle?

A quadrilateral with parallel sides that are equal to one another and four equal vertices is known as a rectangle. It is also known as an equiangular quadrilateral for this reason. Rectangles can also be referred to as parallelograms because their opposite sides are equal and parallel.

Here, we have

Given: Tim wants to buy grass seed to cover his whole lawn, except for the pool. The pool is 5 3/4 m by 3 1/2 m.

We have to find the area the grass seed needs to cover.

Let the area of the grass seed needs to cover be A

Now , the area of the lawn L = ( 11 3/4 ) x 5 m²

The area of the lawn L = 58.75 m²

where the length of the pool l= ( 5 3/4 ) m = 5.75 m

The width of the pool is w = ( 3 1/2 ) m = 3.5 m

Now, Area of Rectangle = Length x Width

On simplifying, we get

Area of the pool P = 5.75 x 3.5 = 20.125m²

Now, the area of the grass seed needs to cover A = L - P

The area of the grass seed needs to cover A = 58.75 m² - 20.125 m²

The area of the grass seed needs to cover A = 38.625 m²

Hence, the area of the grass seed needs to cover is 38.625 m².

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The inequailty y < x + 3 would be true when x = -3 and all values of y are less than 1

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

The statement that x = -3

The above value implies that we substitute -3 for x in an inequality and solve for the variable y

Take for instance, we have

y < x + 4

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

y < -3 + 4

Evaluate

y < 1

This means that the inequailty y < x + 3 would be true when x = -3 and all values of y are less than 1

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Therefore, the probability that Jack wins the race and Martina finishes last is 1/6 or approximately 0.167.

There are 3 people racing, so there are 3! = 6 possible ways the race can end (assuming no ties).

These are:

Jack, Martina, Napier

Jack, Napier, Martina

Martina, Jack, Napier

Martina, Napier, Jack

Napier, Jack, Martina

Napier, Martina, Jack

Of these 6 outcomes, there is only 1 where Jack wins the race and Martina finishes last: outcome 2.

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The Taylor series for f centered at 9, given f^(n)(9) = (-1)^n n!/6^n (n + 2), is f(x) = f(9) - (x-9)/2 + (x-9)^2/12 - (x-9)^3/432 + (x-9)^4/10368 - ... .

To find the Taylor series for f centered at 9, we need to use the formula

f(x) = f(a) + f'(a)(x-a)/1! + f''(a)(x-a)^2/2! + f'''(a)(x-a)^3/3! + ...

where f'(x) represents the first derivative of f(x) with respect to x, f''(x) represents the second derivative of f(x) with respect to x, and so on.

In this case, we are given the nth derivative of f(x) evaluated at x = 9, so we can plug in the values and simplify the formula

f(9) = f(9) (since we're centering the series at 9)

f'(9) = (-1)^1 (1!/6^1)(1 + 2) = -1/2

f''(9) = (-1)^2 (2!/6^2)(2 + 2) = 1/6

f'''(9) = (-1)^3 (3!/6^3)(3 + 2) = -1/36

f''''(9) = (-1)^4 (4!/6^4)(4 + 2) = 1/216

and so on. So the Taylor series for f centered at 9 is

f(x) = f(9) - (x-9)/2 + (x-9)^2/2! * 1/6 - (x-9)^3/3! * 1/36 + (x-9)^4/4! * 1/216 - ...

or, simplifying the coefficients

f(x) = f(9) - (x-9)/2 + (x-9)^2/12 - (x-9)^3/432 + (x-9)^4/10368 - ...

This is the Taylor series for f centered at 9, based on the given information.

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The given question is incomplete, the complete question is:

Find the Taylor series for f centered at 9 if f^(n)(9) = (-1)^n n!/6^n (n + 2)

The best estimate for the number of deer in the park is 1745.

The national forest service caught and tagged 55 deer in order to estimate the number of deer in a particular national park. They then released those deer back into the park and later selected a sample of 319 deer. Of the 319 deer in the sample, 29 were tagged.

Assuming that the proportion of tagged deer in the sample holds for all deer in the forest, we can use a proportion to estimate the number of deer in the park. We know that 29 out of 319 deer in the sample were tagged, so the proportion of tagged deer is 29/319.

To estimate the total number of deer in the park, we can use this proportion. We can set up a proportion where x is the total number of deer in the park:

(29/319) = (55/x)

We can then cross-multiply to solve for x:

29x = 319*55

x = 1745

Therefore, the best estimate for the number of deer in the park is 1745. However, it is important to note that this is just an estimate and there may be some error involved.

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The standard parametric equations for the tangent line to the curve r(t) at t = T₀ = 4 are: x = 24(t-4) + 48, y = 15(t-4) - 3, z = 64(t-4) + 64

To find the parametric equations for the tangent line to the curve r(t) at t = T₀ = 4, we can follow these steps:

Step 1: Find the point on the curve at t = T₀.

To find the point on the curve at t = T₀ = 4, we simply evaluate r(4):

r(4) = 3(4²)i + (4(4)-1)j + 4³k

= 48i + 15j + 64k

So the point on the curve at t = 4 is (48, 15, 64).

Step 2: Find the direction of the tangent line at t = T₀.

To find the direction of the tangent line, we need to take the derivative of r(t) and evaluate it at t = 4. So we first find r'(t):

r'(t) = 6ti + 4j + 3t²k

Then we evaluate r'(t) at t = 4:

r'(4) = 6(4)i + 4j + 3(4²)k

= 24i + 4j + 48k

So the direction of the tangent line at t = 4 is the vector <24, 4, 48>.

Step 3: Write the parametric equations for the tangent line.

To write the parametric equations for the tangent line, we use the point and direction found in steps 1 and 2. We can write the parametric equations as:

x = 48 + 24(t-4)

y = 15 + 4(t-4)

z = 64 + 48(t-4)

Simplifying these equations gives us:

x = 24t + 48

y = 4t - 3

z = 48t + 64

These are the standard parametric equations for the tangent line to the curve r(t) at t = 4.

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ABC curve: order, calculate percentages, and classify items accordingly.

A Curva ABC é uma ferramenta de gestão de estoques que classifica os itens de acordo com sua importância em termos de valor monetário. Para construir a curva ABC, é necessário primeiro ordenar os itens por ordem decrescente de valor monetário (ou de outro critério relevante, como o volume de vendas). Em seguida, deve-se calcular a porcentagem acumulada do valor total de todos os itens, começando pelo mais valioso.

Assim, a classe A será composta pelos itens que representam os primeiros 20% a 30% do valor total (ou outro percentual definido pela empresa), a classe B pelos itens seguintes que representam cerca de 30% a 50% do valor total, e a classe C pelos itens restantes que representam cerca de 20% a 50% do valor total.

Se o enunciado do seu exercício não especificou a proporção de cada classe, você pode assumir as proporções padrão que são amplamente utilizadas na prática empresarial. Assim, a classe A é composta pelos itens mais importantes, que representam cerca de 20% a 30% do valor total, a classe B pelos itens seguintes que representam cerca de 30% a 50% do valor total, e a classe C pelos itens menos importantes que representam cerca de 20% a 50% do valor total.

Para construir a curva ABC, você pode seguir os seguintes passos:

1. Ordene os itens da tabela em ordem decrescente de valor monetário (ou do critério relevante) e calcule o valor total de todos os itens.

2. Calcule a porcentagem acumulada do valor total de cada item, começando pelo mais valioso. Por exemplo, se o item mais valioso representa 10% do valor total, e o segundo item mais valioso representa 15% do valor total, então a porcentagem acumulada dos dois primeiros itens seria de 25%

3. Classifique os itens de acordo com as proporções padrão da curva ABC (20-30% para a classe A, 30-50% para a classe B e 20-50% para a classe C).

4. Desenhe a curva ABC, representando no eixo X o percentual acumulado dos itens e no eixo Y o percentual do valor total.

5. Identifique os itens que pertencem a cada classe (A, B ou C) na curva ABC.

Espero que isso ajude! Se você tiver mais alguma dúvida, não hesite em perguntar.

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Answer: 2

sqrt 41

Step-by-step explanation:

distance formula is just d=√((x2 – x1)² + (y2 – y1)²)

√(-2+8)^2+(-5-3)^2

√(-10)^2+(-8)^2

√100+64

2√41

The probability of getting injured by falling off a ladder is approximately 0.0001113.

The odds against getting injured by falling off a ladder are 8,988 to 1. This means that for every 8,988 people who do not get injured by falling off a ladder, only one person does get injured by falling off a ladder.

To determine the probability of the underlined event, we can use the formula:

Probability = 1 / (odds + 1)

Plugging in the given odds, we get:

Probability = 1 / (8,988 + 1)

Probability = 1 / 8,989

Probability ≈ 0.0001113

Therefore, the probability of getting injured by falling off a ladder is approximately 0.0001113, or about 0.01113%. This is a very low probability, which highlights the importance of taking safety precautions when using a ladder.

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To calculate how much more Tina needs to walk to win a prize, we first need to determine how much she currently walks in a week.

Tina walks 3/10 mile from school to the library three times a week, which is a total of 3/10 x 3 = 9/10 mile. She also walks 4/10 mile home, three times a week, which is a total of 4/10 x 3 = 12/10 miles.

Therefore, Tina currently walks a total of 9/10 + 12/10 = 21/10 miles in a week.

To determine how much more Tina needs to walk to win a prize, we need to know the criteria for winning the prize. If the prize requires walking a certain number of miles in a week, we can subtract 21/10 miles from the required number of miles to find out how much more Tina needs to walk.

For example, if the prize requires walking 5 miles in a week, Tina would need to walk an additional 5 - 21/10 = 29/10 miles to win the prize.

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Answer:

To solve this equation for x, we can begin by simplifying the left side of the equation using the common denominator of 20:

20(3x - 1/4) - 20(2x + 3/5) = 20(1 - x/10)

Next, we can distribute the 20 to each term:

60x - 5 - 40x - 12 = 20 - 2x

Simplifying the left side of the equation:

20x - 17 = 20 - 2x

Adding 2x to both sides:

22x - 17 = 20

Adding 17 to both sides:

22x = 37

Dividing by 22 on both sides:

x = 37/22

Therefore, the solution to the equation 3x-1/4 - 2x+3/5 = 1-x/10 is x = 37/22.

The mean, median, mode, and range for the second week of training are: Mean is 11.3, median is 11, mode is 10, and range is 4.

To find the mean, median, mode, and range for the second week of training, we first need to calculate the new training times by adding five hours to each person's first week time:

Jeff - 9 + 5 = 14

Mark - 5 + 5 = 10

Karen - 5 + 5 = 10

Costas - 5 + 5 = 10

Brett - 7 + 5 = 12

Nikki - 6 + 5 = 11

Jack - 7 + 5 = 12

The new training times for the second week are:

14, 10, 10, 10, 12, 11, 12

To find the mean, we add up all the training times and divide by the number of people:

Mean = (14 + 10 + 10 + 10 + 12 + 11 + 12) / 7

Mean = 11.3

To find the median, we first need to put the training times in order from smallest to largest:

10, 10, 10, 11, 12, 12, 14

The median is the middle value, which in this case is 11.

To find the mode, we need to find the value that occurs most frequently. In this case, there are two modes, which are 10 and 12.

To find the range, we subtract the smallest value from the largest value:

Range = 14 - 10

Range = 4

Therefore, the answer is option C:

Mean is 11.3

Median is 11

Mode is 10

Range is 4

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