Word Building For each item in this section, select the correct word parts from the bank below to form the term that matches the definition. Word parts may be used more than once. 63. Any disease of the adrenal gland 64. Pertaining to the body 65. Any disease of the thyroid gland 66. Tumor of the pancreatic islets 67. Activated by epinephrine 68. Pertaining to the pancreatic islets 69. Enlargement of the thyroid 70. Acting on the thyroid 71. Acting on the body 72. Acting on reproductive organs

The mass of 1 liter (1000 mL or 1000 cm(^3)) of Argon would be 1.78 grams.

To determine the number of atoms of Argon required to make a line 1 inch long, we need to calculate the number of atoms that can fit within that length.

First, we convert the atomic radius of Argon from picometers (pm) to inches.

1 inch = 2.54 cm = 2.54 * 10^7 pm (since there are 10^12 picometers in a meter)

The atomic radius of Argon is 188 pm, we can convert it to inches:

188 pm * (1 inch / 2.54 * 10^7 pm) = 7.40157 * 10^(-6) inches

Next, we calculate the number of atoms that can fit in 1 inch:

Since the atomic radius represents half the length of an atom, we double it to get the length of a single atom:

2 * 7.40157 * 10^(-6) inches = 1.48031 * 10^(-5) inches

To find the number of atoms that can fit in 1 inch, we divide the length of 1 inch by the length of a single atom:

1 inch / (1.48031 * 10^(-5) inches) = 6.751 * 10^4 atoms

Therefore, approximately 67,510 atoms of Argon must be lined up to make a line 1 inch long.

B. To calculate the mass of 1 liter (1000 (cm^3)) of Argon, we need to use its density:

Density = mass / volume

Rearranging the equation, we can solve for mass:

Mass = Density * Volume

Since the volume is given in cm(^3) and the density is given in g/cm^3, the resulting mass will be in grams.

Given that the density of Argon is 1.78 * 10^(-3) g/cm^3 and the volume is 1000 cm^3, we can calculate the mass:

Mass = 1.78 * 10^(-3) g/cm^3 * 1000 cm(^3) = 1.78 grams

Therefore, the mass of 1 liter (1000 mL or 1000 cm(^3) )of Argon would be 1.78 grams.

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The calculations are

a) 4.5 × 0.03060 × 0.421 = 0.0570

b) (7.290 × 10^11) ÷ (6.7100 × 10^4) = 1.09 × 10^7

c) 87.6 + 9.988 + 2.2 + 10.87 = 110.6

d) (25.1 + 273.15) ÷ 2.67410 = 108.1

a) To determine the correct number of significant figures, we multiply the numbers and then round to the least number of significant figures involved, giving the answer of 0.0570.

b) The division of two numbers in scientific notation involves dividing the coefficients and subtracting the exponents. After performing the calculation and rounding to the correct number of significant figures, we get the answer of 1.09 × 10^7.

c) Adding the given numbers, we obtain the sum of 110.6. Since all the numbers provided have three significant figures, the answer also has three significant figures.

d) First, we perform the addition of 25.1 and 273.15, giving us 298.25. Then, we divide this result by 2.67410, rounding to the correct number of significant figures, resulting in the answer of 108.1.

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In order to solve the question, we need to find the elementary matrix E such that EC = A where `A = [2 1 -1; 7 -7 1; 2 2 1]` and `C = [2 1 -1; -3 -17 -1]`

To solve the given question, we will use the formula: `EC = A` and `E = A C ^ -1`

We will first find `C ^ -1`

Matrix C = `[2 1 -1; -3 -17 -1]` To find the inverse of matrix C, it should be a square matrix. But here C is non square matrix with 2 rows and 3 columns. Hence the E matrix cannot be found.

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The solution to the nonlinear inequality \((x-8)(x-7)(x+2)>0\) expressed in interval notation is \((-2,7)\cup(8,\infty)\). The graph of the solution set is shown below.

To solve this inequality, we need to find the intervals where the expression \((x-8)(x-7)(x+2)\) is greater than zero.

First, we set each factor equal to zero and find the critical points: \(x-8=0 \Rightarrow x=8\), \(x-7=0 \Rightarrow x=7\), and \(x+2=0 \Rightarrow x=-2\).

Next, we test the intervals created by these critical points by plugging in test values. For example, when \(x<-2\), we can choose \(x=-3\). Plugging this value into the expression gives us \((-3-8)(-3-7)(-3+2)=(-11)(-10)(-1)=-110>0\), so the expression is greater than zero in this interval.

We repeat this process for the other intervals and find that the expression is greater than zero when \(x\in(-2,7)\cup(8,\infty)\).

The graph shows that the solution set consists of all values of \(x\) in the intervals \((-2,7)\) and \((8,\infty)\), where the graph is above the x-axis.

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The number 12 has two significant-figures, both digits are considered significant

Significant figures, also known as significant digits, are the digits in a number that contribute to its precision or accuracy.

In the case of the number 12, both digits, "1" and "2," are non-zero digits. Non-zero digits are always considered significant.

However, there are no decimal points or trailing zeros in this number, so there is no additional information regarding the precision of the measurement.

Leading zeros before the first non-zero digit are not considered significant. For example, in the number 0.12, the leading zero is not significant, and the two significant figures are "1" and "2."

In the case of the number 12, there are no leading or trailing zeros, and both digits are non-zero. Therefore, both digits are considered significant, resulting in a total of two significant figures.

It is important to recognize the number of significant figures in a value as it affects the accuracy of calculations and the representation of the precision in scientific measurements.

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The limit as t approaches 0 of y(t) is 3. The output as a function of time for a unit step input change in a second-order process is g(t) = 3 - 6e^(-t/2). The linearized equation at the equilibrium point x = -2 is x' ≈ -16.

1.1. To find the limit as t approaches 0 for the given function y(t) = 4e^(-3t) + 12e^(-t) - 13e^(-2t), we substitute t = 0 into the expression:

= 4e^0 + 12e^0 - 13e^0

= 4 + 12 - 13

= 3

Therefore, the limit of y(t) as t approaches 0 is 3.

1.2. The transfer function of the given second-order process is G(s) = 3/(s(2s + 1)). To find the output as a function of time for a unit step input change, we perform the inverse Laplace transform of the transfer function.

First, we decompose the transfer function into partial fractions:

G(s) = 3/(s(2s + 1)) = A/s + B/(2s + 1)

Multiplying both sides by s(2s + 1) gives:

3 = A(2s + 1) + Bs

Expanding and equating coefficients, we get:

2A + B = 0 (coefficient of s^2 terms)

A = 3 (coefficient of s^1 terms)

Solving these equations, we find A = 3 and B = -6.

Now we have the partial fraction decomposition:

G(s) = 3/s - 6/(2s + 1)

Taking the inverse Laplace transform of each term:

g(t) = 3 - 6e^(-t/2)

Therefore, the output as a function of time, g(t), for a unit step input change is given by g(t) = 3 - 6e^(-t/2).

The given first-order differential equation is x' = 2x^2 - 8. The equation at the equilibrium point x = -2 is linearized by finding the linearized equation by taking the derivative of the nonlinear term with respect to x and evaluating it at the equilibrium point.

We differentiate the nonlinear term, 2x^2, with respect to x:

d(2x^2)/dx = 4x

At the equilibrium point x = -2, we evaluate the derivative:

d(2x^2)/dx |_x=-2 = 4(-2) = -8

Now, the linearized equation is obtained by replacing the nonlinear term with its linear approximation:

x' ≈ -8 - 8

Simplifying, we have:

x' ≈ -16

Therefore, the linearized equation at the equilibrium point x = -2 is x' ≈ -16.

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Answer:

Card 1: 4

Card 2: 5

Card 3: 12

Step-by-step explanation:

We know that the smallest card is 4

Range is the difference between the smallest and biggest numbers, which means that the difference between 4 and the largest card is 12

4 + 8 = 12

That means the largest card is 12

Now we just need to find the middle/second card

If the mean is 7 and there are 3 cards, that means the value of the 3 cards needs to equal 21

So far the total value is 12 + 4 = 16

That means the middle/second card's value is 5

Check:

Range: 12 - 4 = 8

Mean: 4 + 12 + 5 = 21 / 3 = 7

Answer:

4, 5, 12

Step-by-step explanation:

Range = low card - high card

but we find the high card, 8 = 4 - high card

high card = 8 + 4 = 12

mean = (low card + middle card + high card)/3

7 = (4 + middle card + 12) / 3

7 = ( 16 + middle card) / 3

7 × 3 = 16 + middle card

21 = 16 + middle card

hence, the middle card= 21 - 16 = 5

the values of the cards are 4, 5, 12

Answer:

24

Step-by-step explanation:

Price per biro: 12.50

Total budget: 300

Calculation: 300 / 12.50 = 24 biros

Slope at point x = π is -2.

The given function is  y = 2sin(x) + cos(x)

and we have to find the slope of y = 2sin(x) + cos(x) at the point x = π.

So, we will differentiate y w.r.t x

and then put x = π in the derived expression to obtain the slope of the given function at the point x = π.

Differentiating y w.r.t x

(dy/dx) = d/dx(2sin(x) + cos(x))

On differentiating, we get

dy/dx = 2cos(x) - sin(x)

So, the derivative of

y = 2sin(x) + cos(x) is dy/dx = 2cos(x) - sin(x)

Now, put x = π in the above expression to find the slope of the given function at the point x = π.

dy/dx = 2cos(x) - sin(x)

at x = π

dy/dx = 2cos(π) - sin(π)

dy/dx = -2 - 0

dy/dx = -2

Slope at x = π is -2.

So, the correct option is b) -2.

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The matrices A and B are not inverses of each other.

To determine if two matrices are inverses of each other, we need to check if their product is the identity matrix. Let's calculate the product of matrices A and B:

A * B = ⎣⎡23 35⎦⎤ * ⎣⎡5 -3⎦⎤

     = ⎣⎡-4 0⎦⎤

The product of matrices A and B is not the identity matrix:

A * B ≠ I

Since the product of matrices A and B is not the identity matrix, we can conclude that matrices A and B are not inverses of each other.

In order for two matrices to be inverses, their product must equal the identity matrix. In this case, the product of matrices A and B does not result in the identity matrix, indicating that they are not inverses of each other.

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The result of the given radical expression \(\sqrt{-3} \sqrt{-27}\) is \(9i\).

The given expression is \(\sqrt{-3} \sqrt{-27}\).

To evaluate this radical expression, we can simplify each square root separately and then multiply the results together.

First, let's simplify \(\sqrt{-3}\). The square root of a negative number is not a real number, but it can be expressed in terms of the imaginary unit \(i\). We know that \(i^2 = -1\). So, \(\sqrt{-3}\) can be written as \(\sqrt{3} \cdot i\).

Next, let's simplify \(\sqrt{-27}\). Again, we can use the fact that \(i^2 = -1\). We have \(\sqrt{-27} = \sqrt{9 \cdot -3} = \sqrt{9} \cdot \sqrt{-3} = 3 \cdot \sqrt{-3}\).

Now, let's multiply the two simplified square roots together: \(\sqrt{3} \cdot i \cdot 3 \cdot \sqrt{-3}\).

Multiplying the numbers outside the square roots, we get \(3 \cdot 3 = 9\).

Multiplying the square roots, we have \(\sqrt{3} \cdot \sqrt{-3} = \sqrt{3 \cdot -3} = \sqrt{-9}\).

Finally, we can express the result in the form \(a+bi\). Since \(\sqrt{-9}\) can be written as \(3i\), the expression \(\sqrt{-3} \sqrt{-27}\) simplifies to \(9i\).

So, the result of the given radical expression \(\sqrt{-3} \sqrt{-27}\) is \(9i\).

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To show that the lines intersect, we need to find values of t and s that satisfy the equations of both lines. An equation for the plane containing both lines can be found by taking the cross product of the direction vectors of the lines.

(a) To show that the lines intersect, we can equate the x, y, and z coordinates of L1 and L2 and solve for t and s. If there is a solution, then the lines intersect.
(b) To find an equation for the plane containing both lines, we can take the cross product of the direction vectors of L1 and L2. The resulting vector will be perpendicular to both lines and can be used to determine the equation of the plane.
(c) To find the acute angle between the lines, we can use the dot product formula. The dot product of the direction vectors of L1 and L2 is equal to the product of the magnitudes of the vectors and the cosine of the angle between them. We can solve for the angle θ using the formula cos(θ) = dot product / (magnitude of line 1 * magnitude of line 2).

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The length of the main diagonal of the cube is (3√6)/2 metres.

To find the length of the main diagonal, we first find the length of the diagonal of one face using the Pythagorean theorem. Then, we multiply this length by √6 to account for all six faces of the cube. Finally, we simplify the expression to get the final answer.

The main diagonal of a cube is the diagonal connecting any two opposite vertices of the cube. To find the length of the main diagonal, we start by using the Pythagorean theorem to find the length of the diagonal of one face of the cube. We know that the side length of the face is √3/2 metres, so we calculate (√3/2)^2 + (√3/2)^2 = 3/4 + 3/4 = 3/2 metres.

Since a cube has six faces, we multiply this length by √6 to account for all six faces. Simplifying the expression (√6) * (3/2) gives us the length of the main diagonal as (3√6)/2 metres.

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The correct range of v is from 0 to infinity excluding infinity itself. The error in taking the range as 0 to infinity is utterly negligible due to the exponential decay of the function beyond a certain threshold.

In the given question, the range of v is initially stated as 0 to infinity. However, this is incorrect because it includes infinity as a valid value, which is not physically feasible. In physics, infinity is used as a mathematical concept to represent an unbounded or limitless quantity, but it is not an actual value that can be measured or observed.

The correct range of v should be from 0 to infinity, excluding infinity itself. This means that the values of v can be any positive real number greater than or equal to 0, but not reaching infinity.

Now, moving on to the second part of the question, the error in taking the range as 0 to infinity is considered utterly negligible. This is because the given expression involves an exponential term, specifically the term e^(-(v′/vm)^2), where vm is a constant. As v′ approaches infinity, the exponential term rapidly decreases towards zero. In other words, the contribution of molecules with speeds approaching infinity to the overall fraction becomes vanishingly small.

Due to this exponential decay, the fraction of molecules whose speed is in the range 0 to v′ converges to a finite value even if v′ approaches infinity. Therefore, the error introduced by considering the range as 0 to infinity is considered to be utterly negligible in practical calculations and does not significantly impact the final result.

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Answer:

1-the number before a variable in an algebraic expression

2-the variable representing the first element of the ordered in a function; the inputs

3-a relation in which for any given input value, there is only one output value

4-a value that is substituted in for the variable in a function in order to generate an output value

5-the variable representing the second element of the ordered pairs in a function; the outputs

6-a set of data in which values can take on any value within a given interval

7-a set of data in which the values are distinct and separate

8-a value generated by a function when an input value is substituted into the function and evaluated

PLEASE GET AN EXPERT TO CHECK THIS T-T

Step-by-step explanation:

The amount of $767 in year 7, with an interest rate of 6% compounded annually, would be worth approximately $690.89 in terms of dollars in year 3.

To apply this formula to the given problem, we need to determine the principal or starting amount in year 3. We can set up the equation as follows:

767 = P(1 + 0.06/1)^(7-3)

Simplifying the equation, we get:

P = 767/(1.06)^4P ≈ 585.51So the principal or starting amount in year 3 is approximately $585.51. Now we can use the formula for compound interest again to determine the amount in year 3.

We set up the equation as follows:A = 585.51(1 + 0.06/1)^(3)

Simplifying the equation, we get:A ≈ 690.89

Therefore, the amount of $767 in year 7, with an interest rate of 6% compounded annually, would be worth approximately $690.89 in terms of dollars in year 3.

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The angle of elevation of the sun is 60° and a tree casts a shadow of 75 feet long. Let's represent the height of the tree as 'h'.From the given figure below, we can see that the tree, the shadow, and the sun form a right-angled triangle.

From trigonometry, we know that:tanθ = opposite / adjacenttan60° = h / 75√3 = h / 75h = 75√3 feetTherefore, the height of the tree is 75√3 feet.15. If a vector v has a magnitude 10.0 and makes an angle of 30° with the positive y-axis, find the magnitudes of the horizontal and vertical components of v.We are given the magnitude (|v|) and the angle that vector v makes with the positive y-axis.

Let's represent the horizontal component of the vector as 'x' and the vertical component as 'y'.We can find the value of x and y as follows:x = |v| cosθy = |v| sinθwhere θ is the angle that the vector makes with the positive y-axis. Given that the angle θ is 30° and the magnitude of the vector is 10.0, we have:x = 10.0 cos 30°y = 10.0 sin 30°= 10.0 × √3 / 2= 5.0√3≈ 8.66The magnitudes of the horizontal and vertical components of the vector are approximately 5.0 and 8.66, respectively.

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The solution, to the proper number of significant figures, is 1750 J.

To find the solution to the calculation, let's break it down step by step while considering the significant figures.

Calculate the difference in mass

(165.43 g - 78.15 g) = 87.28 g

Calculate the temperature difference

(297.6 K - 292.8 K) = 4.8 K

Multiply the mass difference by the specific heat capacity

87.28 g × 4.184 Jg^(-1)K^(-1) = 364.72592 J

Multiply the result by the temperature difference

364.72592 J × 4.8 K = 1750.254976 J

To determine the proper number of significant figures in the final answer, we look at the values involved in the calculation.

The given masses have five significant figures: 165.43 g and 78.15 g.

The specific heat capacity, 4.184 Jg^(-1)K^(-1), is defined with four significant figures.

The temperature difference, 4.8 K, has two significant figures.

The multiplication of the mass difference and specific heat capacity yields a result with eight significant figures, while the multiplication with the temperature difference gives a result with four significant figures.

To maintain the proper number of significant figures in the final answer, we must consider the least precise value involved, which is the temperature difference with two significant figures.

Therefore, the solution, to the proper number of significant figures, is:

1750 J

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Answer:

Step-by-step explanation:

To find the value of θ given sin(69°) = cos(θ) and 0° < θ < 90°, we can follow these steps:

Step 1: Use the trigonometric identity sin(θ) = cos(90° - θ) to rewrite the given equation: sin(69°) = cos(90° - θ).

Step 2: Substitute the given value sin(69°) into the equation: sin(69°) = cos(90° - θ).

Step 3: Since sin(69°) = cos(90° - θ), we can conclude that 69° = 90° - θ.

Step 4: Rearrange the equation to solve for θ: θ = 90° - 69°.

Step 5: Calculate the value of θ: θ = 21°.

Therefore, if sin(69°) = cos(θ) and 0° < θ < 90°, then θ = 21°.

a. The window is in the shape of a half circle with the length of the base, b, forming the diameter of the circle.

b. The expression to represent the perimeter of the window frame in terms of the length of the base is 2πr, where r is the radius of the circle. Since the base of the window forms the diameter, the radius is equal to half the length of the base, so the expression can be simplified to πb.

c. The formula to define the length of the frame (perimeter), P, of the window in terms of the length of the base is P = πb.

d. When b = 14.5, the perimeter of the window frame is evaluated using the formula P = πb. Plugging in the value, we get P = π * 14.5 = 45.54 inches. This represents the corresponding perimeter of the window when the length of the base is 14.5 inches.

e. To write a formula defining the length of the base of the window, b, in terms of the length of the frame, P, we can rearrange the formula P = πb to solve for b. Dividing both sides of the equation by π, we get b = P/π.

f. When the perimeter of the window frame is 55 inches, we can use the formula b = P/π to find the length of the base. Plugging in P = 55, we get b = 55/π ≈ 17.49 inches.

In summary,
a. The window is in the shape of a half circle, with the length of the base, b, forming the diameter of the circle.
b. The expression to represent the perimeter of the window frame in terms of the length of the base is πb.
c. The formula to define the length of the frame (perimeter), P, of the window in terms of the length of the base is P = πb.
d. When b = 14.5, the perimeter of the window frame is 45.54 inches, representing the corresponding perimeter of the window.
e. The formula to define the length of the base of the window, b, in terms of the length of the frame, P, is b = P/π.
f. When the perimeter of the window frame is 55 inches, the length of the base is approximately 17.49 inches.

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The pressure of the Earth's atmosphere at sea level, when expressed in g/m2, is approximately 3,319,123.27 g/m2.

The pressure exerted by the Earth's atmosphere at sea level can be calculated by converting the given value of 46.68 lb/in2 into g/m2. To do this, we need to use the provided conversion factors: 2.54 cm = 1 in and 2.205 lb = 1 kg.

Convert lb/in2 to kg/cm2:

46.68 lb/in2 * (1 kg / 2.205 lb) * (1 in2 / 2.54 cm2) = 20.0017 kg/cm2

Convert kg/cm2 to g/m2:

20.0017 kg/cm2 * 1000 g/kg * (100 cm / 1 m) * (100 cm / 1 m) = 3,319,123.27 g/m2

Therefore, the pressure of the Earth's atmosphere at sea level, when expressed in g/m2, is approximately 3,319,123.27 g/m2.

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A circular plate of diamter 50 mm resting with a point on the circumference in HP and the surface is inlined at 55 The resulting projection will depict the circular plate with the specified conditions.

To draw the projection of the circular plate with the given conditions, follow the steps below:

1. Begin by drawing the horizontal line (HL) and the vertical line (VL) to represent the horizontal and vertical planes, respectively.

2. Mark a point 'O' on the horizontal line (HL) to represent the center of the circular plate.

3. From point 'O,' draw a vertical line upwards to represent the axis of the circular plate. Label this line as 'OA.'

4. Draw a line at an angle of 55 degrees from the horizontal line (HL) and passing through point 'O.' Label this line as 'OB.'

5. At point 'O,' draw a horizontal line towards the left and right, representing the diameter of the circular plate. Label the points where this line intersects the vertical line 'OA' as 'A' and 'B.'

6. Draw a line at an angle of 60 degrees from the vertical line (VL) and passing through point 'A.' Label this line as 'AC.'

7. Draw a line at an angle of 60 degrees from the vertical line (VL) and passing through point 'B.' Label this line as 'BD.'

8. From points 'C' and 'D,' draw horizontal lines towards the left and right, respectively, to intersect the line 'OB.' Label the points of intersection as 'E' and 'F,' respectively.

9. Connect points 'A,' 'C,' 'E,' 'O,' and 'F' to form the projection of the circular plate.

10. Mark the points 'G' and 'H' on line 'OA' at a distance of 25 mm from point 'O.' These points represent the top and bottom points on the circumference of the circular plate.

11. Draw lines from points 'G' and 'H' towards point 'A' to complete the projection of the circular plate.

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a) The function C(x) for the total cost can be expressed as: C(x) = 250 + 4x

b) Jimmy charges $13 per lawn.

c) Jimmy must mow at least 28 lawns before he begins making a profit.

\

a) The total cost of mowing x lawns can be calculated by considering the initial cost of the lawnmower and the cost of gasoline and maintenance per lawn.

Since the lawnmower cost is a one-time expense, and the gasoline and maintenance cost is $4 per lawn, the function C(x) for the total cost can be expressed as:

C(x) = 250 + 4x

b) The total-profit function P(x) is given as P(x) = 9x - 250. The total revenue is the income generated from mowing x lawns.

Revenue can be calculated by subtracting the total profit from the total cost. Since revenue equals profit plus cost, we can write:

R(x) = P(x) + C(x)

= (9x - 250) + (250 + 4x)

= 13x

The function for the total revenue from mowing x lawns is R(x) = 13x.

To find out how much Jimmy charges per lawn, we can calculate the average revenue per lawn by dividing the total revenue by the number of lawns mowed:

Average revenue per lawn = R(x)/x = 13x/x = 13

Therefore, Jimmy charges $13 per lawn.

c) To determine the point at which Jimmy begins making a profit, we need to find the break-even point where total revenue equals total cost. Setting R(x) equal to C(x) and solving for x:

13x = 250 + 4x

9x = 250

x = 250/9 ≈ 27.78

Therefore, Jimmy must mow at least 28 lawns before he begins making a profit.

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The correct choices are:

Experiment 1 occurs faster because of presence of the catalyst(Pt) in the reaction. The catalyst lowers the activation energy and provides an alternative path to get the desired product. Increased likelihood of reactant collisions results in reactants more effectively coming in contact with each other.

Due to increased likelihood of reactant collisions, the chances of successful reaction increases. Additionally, faster reaction has an increased fraction of reactants with high enough kinetic energy to overcome activation energy barrier, which helps in enhancing the reaction rate.

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Given that line segment AD = 48. B is between A and D and C is between B and D. B and C divide line segment AD in the ratio 9:4:3. To prove algebraically that AB is not equal to BD, we need to use the concept of ratio.

Let us assume the length of AB as x. Then, BD will be equal to (48 - x).

According to the given question, B and C divide line segment AD in the ratio 9:4:3.

Hence, we can write the following equations:AB/BD = 9/3x/48 - x = 9/3x/48 - 1 = 9/(3x - 48) … (1)AC/CD = 4/3(x + y)/48 - (x + y) = 4/3(x + y)/48 - 1 = 4/(3x + 3y - 48) … (2)

Simplifying the above equations, we get: 3x - 48 = 9 ...

(from equation 1)  3x = 57x = 19

Now, substitute the value of x in equation 1, we get: AB/BD = 9/21 = 3/7

Since AB/BD is not equal to 1, we can say that AB is not equal to BD.

Therefore, algebraically it is proven that AB is not equal to BD.

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The equation of the ellipse is given by the following:

4x² + y² - 24x + y - 2 = 0

First, we need to rearrange the equation into standard form.

4x² - 24x + y² + y = 2

Completing the square of x terms; 4(x² - 6x + 9) + y² + y = 26(x - 3)² + y² + y = 26

Completing the square of y terms; (x - 3)² + (y + 0.5)² = 3²

This is an ellipse with center (3, -0.5) and semi-major axis 3 and semi-minor axis 3.

Area of the ellipse is given by the formula: Area = πab where, a is the length of the semi-major axis and b is the length of the semi-minor axis.

Substituting the values, Area of ellipse = π × 3 × 3 = 9π ≈ 28.27

Hence, the answer is not given in the options.

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(a)   The standard time for the work cycle is 3485.39 min.

(b)   The worker's efficiency is approximately 8505.6%.

(c)    The worker's performance on the portion of the cycle he controlled is approximately 1.96%.

(a)    To determine the standard time for the work cycle, we need to consider the allowances for personal and machine-related factors.

Given:

Normal time of the work cycle (T) = 5.39 min

Operator-controlled portion (O) = 0.84 min

PFD allowance factor (PFD) = 16% (0.16)

Machine allowance factor (MAF) = 3000

The total allowances can be calculated as follows:

Total Allowances = (PFD allowance factor * machine allowance factor) + machine allowance factor

= (0.16 * 3000) + 3000

= 480 + 3000

= 3480

Standard time for the work cycle (ST) = T + Total Allowances

= 5.39 + 3480

= 3485.39 min

Therefore, the standard time for the work cycle is 3485.39 minutes.

(b)    To calculate the worker's efficiency, we need to determine the number of units produced and compare it to the standard time.

Given:

Number of units produced during an 8-hour shift = 85

Standard time for the work cycle = 3485.39 min

Shift duration = 8 hours = 480 min

Total units produced during the shift = (Number of units produced per cycle) * (Number of cycles per shift)

= 85 * (480 / T)

= 85 * (480 / 5.39)

= 85 * 89.0

= 7565

Efficiency = (Total units produced / Total units that could be produced) * 100

= (7565 / (480 / T)) * 100

= (7565 / (480 / 5.39)) * 100

= (7565 / 89.0) * 100

= 8505.6

Therefore, the worker's efficiency is approximately 8505.6%.

(c)    To determine the worker's performance on the portion of the cycle he controlled, we need to calculate the actual time spent on the operator-controlled portion and compare it to the standard time.

Given:

Total time lost due to personal needs and delays = 42 min

Operator-controlled portion (O) = 0.84 min

Actual time spent on the operator-controlled portion = O + Total time lost

= 0.84 + 42

= 42.84 min

Worker's performance = (Standard time for operator-controlled portion / Actual time spent on operator-controlled portion) * 100

= (O / (O + Total time lost)) * 100

= (0.84 / (0.84 + 42)) * 100

= (0.84 / 42.84) * 100

= 1.96

Therefore, the worker's performance on the portion of the cycle he controlled is approximately 1.96%.

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Answer:12 + 7.93725393 i

Step-by-step explanation:

it's impossible

The required value of y for the unit circle is: 2/3

The circle is defined as the locus of a point whose distance from a fixed point is constant i.e center (h, k).

The equation of the circle is given by:

(x - h)² + (y - k)² = r²

where:

h, k is the coordinate of the center of the circle on coordinate plane.

r is the radius of the circle.

Here,

Equation of the unit circle is given as,

x² + y² = 1

Now substitute the given value in the equation,

5/9 + y² = 1

y² = 1 - 5/9

y² = 4/ 9

y = √(4/9)

y = 2/3

Thus, the required value of y for the unit circle is 2/3

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(7) If x = (3 - √13) / 2, the value of the expression x² + 1/x² is 10.98.

(8)  If x = 1 / (8 - √60), the value of the expression x³ - 5x² + 8x - 4, is 11.02.

(7) If x = (3 - √13) / 2, the value of the expression x² + 1/x² is calculated as follows;

we can simplify the value of x as follows;

x = (3 - √13) / 2 = -0.303

The value of the expression x² + 1/x² is calculated as;

x² + 1/x² = (-0.303²) + 1/(-0.303)²

⇒ (-0.303²) + 1/(-0.303)²  = 10.98

(8)  If x = 1 / (8 - √60), the value of the expression x³ - 5x² + 8x - 4, is calculated as follows;

x = 1 / (8 - √60)

x = 3.937

x³ - 5x² + 8x - 4 = (3.937)³ - 5(3.937)² + 8(3.937) - 4

= 11.02

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