When the price of a certain commodity is p dollars per unit, the manufacturer is willing to supply x thousand units, where: x² - 6x√√p - p² = 85 If the price is $16 per unit and is increasing at the rate of 76 cents per week, the supply is changing by _____ units per week.

Answers

Answer 1

When the price is $16 per unit and increasing at a rate of 76 cents per week, the supply is changing by 6 units per week.

To find the rate at which the supply is changing, we need to differentiate the given equation with respect to time. Let's denote the supply as x and time as t.

From the given equation, we have:

x² - 6x√√p - p² = 85

Differentiating both sides with respect to t, we get:

2x(dx/dt) - 6(1/2)(1/√p)(dx/dt)√√p - 0 = 0

Simplifying this equation, we have:

2x(dx/dt) - 3(1/√p)(dx/dt)√√p = 0

Factoring out dx/dt, we get:

(dx/dt)(2x - 3√p) = 0

Since we are interested in the rate of change of supply, dx/dt, we set the expression in parentheses equal to zero and solve for x:

2x - 3√p = 0

2x = 3√p

x = (3√p)/2

Now, let's substitute the given values:

p = 16 (price per unit in dollars)

dp/dt = 0.76 (rate of change of price per unit in dollars per week)

Substituting these values into the equation for x, we get:

x = (3√16)/2

x = (3 * 4)/2

x = 6

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Related Questions

You are shown a graph of two lines that intersect once at the
point equation, ( -3/7 , 7/3) what do you know must be true of the
system of equations?.

Answers

The only thing we can conclude is that we have one solution at  ( -3/7, 7/3).

What must be true about the function?

We know that for any system of equations:

y = f(x)

y = g(x)

We can solve it graphically by graphing both of the equations in the same coordinate axis. To find the solutions of the system, we need to find the points where the graphs intercept.

In this case, we know that we have a graph of two lines that intersect once at the point ( -3/7 , 7/3).

Then the only thing we can conclude about this system is that it has only oe solution at the point  ( -3/7 , 7/3).

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the number one personality trait shared by many successful entrepreneurs is:

Answers

The number one personality trait that is shared by many successful entrepreneurs is being on the cutting edge of technological change.

Here,

One have been curious about every aspect of the business.

Successful entrepreneurs are curious about things. One always want to know about the more information such as – how things work, how to make them better, what consumers are thinking. This insatiable curiosity ensures the business models which are never stagnant and always evolving with the times.

The number one personality trait that is shared by many successful entrepreneurs is being on the cutting edge of technological change.

As technology continues to advance,  that it is crucial for entrepreneurs to stay up to date with the latest developments in their industry.

This helps them to identify new opportunities and better serve the customers.

However, it's important for us to note that other traits such as charisma, and can be stated as a desire for power, a desire to employ others, and conscientiousness can also contribute to an entrepreneur's success.

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Let F= (y/x^2+Y^2, - x/x^2+y^2( be a field of force in the xOy plane and let 2 2 x² + + y² (C) be the circle x = acost, y = asint (0 ≤ t ≤ 2n, a > 0). Suppose that a par- ticle moves along the circle (C) with positive direction and makes a cycle. Find the work done by the field of forc

Answers

The work done by the force field F on a particle moving along the circle C is zero. The force field F is conservative, which means that there exists a potential function ϕ such that F = −∇ϕ.

The potential function for F is given by

ϕ(x, y) = −x^2/2 - y^2/2

The work done by a force field F on a particle moving from point A to point B is given by

W = ∫_A^B F · dr

In this case, the particle starts at the point (a, 0) and ends at the point (a, 0). The integral can be evaluated as follows:

W = ∫_a^a F · dr = ∫_0^{2π} −∇ϕ · dr = ∫_0^{2π} (-x^2/2 - y^2/2) · (-a^2 sin^2 t - a^2 cos^2 t) dt = 0

Therefore, the work done by the force field F on a particle moving along the circle C is zero.

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Use Modular Arithenetic to prove that 5/p^6- p^z? for every integer p?

Answers

Given that p is any integer, it is required to prove that 5/p^6- p^z.How to use modular arithmetic to prove this is explained below:

First, let's express the given expression using modular arithmetic.5/p6 - pz can be written as 5(p6 - z) /p6.Since p6 is a multiple of p, we can say that p6 = pm for some integer m.Substituting this in the above expression,

we get:5(p6 - z) /p6 = 5(pm - z) /pm

We can now use modular arithmetic to prove that this expression is equivalent to 0 (mod p).

Since p is a factor of pm, we can say that 5(pm - z) is divisible by p. Therefore, 5(pm - z) is equivalent to 0 (mod p).

Thus, we have proven that 5/p^6- p^z is equivalent to 0 (mod p) for every integer p.

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For the following exercises, write the partial traction decomposition 2) -8x-30/ x^2+10x+25 3) 4x²+17x-1 /(x+3)(x²+6x+1) 3)

Answers

According to the statement the partial fraction decomposition is:`4x² + 17x - 1/(x + 3)(x² + 6x + 1) = 3/2(x + 3) + (5x - 7)/(x² + 6x + 1)`

Partial fraction decomposition is a method of writing a rational expression as the sum of simpler rational expressions. This decomposition includes solving for the coefficients of the simpler expressions that are being summed.For the rational function `-8x-30/x²+10x+25`, the partial fraction decomposition is given as follows:`-8x - 30/(x + 5)² = A/(x + 5) + B/(x + 5)², where A and B are unknown constants.`Multiplying both sides by (x + 5)², we obtain:`-8x - 30 = A(x + 5) + B`Expanding the right-hand side, we have:`-8x - 30 = Ax + 5A + B`Equating coefficients, we have:`A = 8``5A + B = -30`Solving for B, we have:`B = -70`Hence, the partial fraction decomposition is:`-8x - 30/(x + 5)² = 8/(x + 5) - 70/(x + 5)²`For the rational function `4x² + 17x - 1/(x + 3)(x² + 6x + 1)`, the partial fraction decomposition is given as follows:`4x² + 17x - 1/((x + 3)(x² + 6x + 1)) = A/(x + 3) + (Bx + C)/(x² + 6x + 1), where A, B, and C are unknown constants.`Multiplying both sides by (x + 3)(x² + 6x + 1), we obtain:`4x² + 17x - 1 = A(x² + 6x + 1) + (Bx + C)(x + 3)`Expanding the right-hand side, we have:`4x² + 17x - 1 = Ax² + 6Ax + A + Bx² + 3Bx + Cx + 3C`Equating coefficients, we have:`A + B = 4``6A + 3B + C = 17``A + 3C = -1`Solving for A, B, and C, we obtain:`A = 3/2``B = 5/2``C = -7`Hence, the partial fraction decomposition is:`4x² + 17x - 1/(x + 3)(x² + 6x + 1) = 3/2(x + 3) + (5x - 7)/(x² + 6x + 1)`

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the authour of a book serieas incresies the number of pages with each book as shown in the table a line of best fit for this data is N=41b+137

Answers

The number of pages on the seventh book is given as follows:

424 pages.

How to find the numeric value of a function at a point?

To obtain the numeric value of a function or even of an expression, we must substitute each instance of the variable of interest on the function by the value at which we want to find the numeric value of the function or of the expression presented in the context of a problem.

The function for this problem is given as follows:

N = 41b + 137.

Hence the number of pages for the seventh book is given as follows:

N = 41 x 7 + 137 = 424 pages.

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Write the augmented matrix of the system and use it to solve the system. If the system has an infinite number of solutions, express them in terms of the parameter z. 18y 32 - 12x + - 2x + Z y Зу - 6

Answers

If the system has an infinite number of solutions, the augmented matrix of the system can be expressed as follows:

An augmented matrix is a matrix that represents a system of linear equations. It consists of the coefficients of the variables in the equations, along with a column containing the constants on the right-hand side of the equations. The augmented matrix allows us to perform row operations and apply matrix operations to solve the system of equations.

To write the augmented matrix for the given system, we arrange the coefficients of the variables and the constants into a matrix form. The system can be represented as:

| 0 18 -12 0 0 |

| 2 0 32 1 0 |

| -2 1 0 0 0 |

| 0 0 1 1 0 |

| 0 0 0 3 -6 |

Now, we can perform row operations on this matrix to solve the system.

R1 = R1 / 18

| 0 1 -2/3 0 0 |

| 2 0 32 1 0 |

|-2 1 0 0 0 |

| 0 0 1 1 0 |

| 0 0 0 3 -6 |

R2 = R2 - 2R1 and R3 = R3 + 2R1

| 0 1 -2/3 0 0 |

| 2 -2/3 40/3 1 0 |

| 0 5/3 -4/3 0 0 |

| 0 0 1 1 0 |

| 0 0 0 3 -6 |

R4 = R4 - R3

| 0 1 -2/3 0 0 |

| 2 -2/3 40/3 1 0 |

| 0 5/3 -4/3 0 0 |

| 0 -5/3 5/3 1 0 |

| 0 0 0 3 -6 |

R2 = R2 + (2/3)R1 and R3 = R3 - (5/3)R1

| 0 1 -2/3 0 0 |

| 2 0 16/3 1 0 |

| 0 0 -2/3 0 0 |

| 0 -5/3 5/3 1 0 |

| 0 0 0 3 -6 |

R3 = R3 * (-3/2) and R4 = R4 + (5/3)R2

| 0 1 -2/3 0 0 |

| 2 0 16/3 1 0 |

| 0 0 1 0 0 |

| 0 0 5/3 1 0 |

| 0 0 0 3 -6 |

R4 = R4 - (5/3)R3

| 0 1 -2/3 0 0 |

| 2 0 16/3 1 0 |

| 0 0 1 0 0 |

| 0 0 0 1 0

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need help
Let f(x)= x + 4 and g(x) = x - 4. With the following stephs, determine whether f(x) and g(x) are inverses of each other: (a) f(g(x)) (b) g(f(x)) = (c) Are f(x) and g(x) inverses of each other?

Answers

(a) f(g(x)) = x,

(b)  g(f(x))= x

(c) f(x) and g(x) are inverses of each other

The given functions are,

f(x)= x + 4

g(x) = x - 4

To find f(g(x)),

Put in g(x) for x in the expression for f(x),

⇒ f(g(x)) = g(x) + 4 = (x - 4) + 4 = x

Since, f(g(x)) = x,

we can see that f(x) and g(x) are inverse functions, at least in part.

(b) To find g(f(x)),

Put in f(x) for x in the expression for g(x),

⇒ g(f(x)) = f(x) - 4

             = (x + 4) - 4  

             = x

As with part (a), we find that g(f(x)) = x.

This confirms that f(x) and g(x) are indeed inverse functions.

(c) To determine whether f(x) and g(x) are inverses of each other,

Verify that applying one function after the other gets us back to where we started.

We have to check that,

⇒ f(g(x)) = x and g(f(x)) = x

We have already shown that both of these equations hold,

so we can conclude that f(x) and g(x) are inverses of each other.

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Find The Derivative Of The Function 9(x):

9(x) = ∫^Sin(x) 5 ³√7 + t² dt

Answers

The derivative of the function 9(x) = ∫[sin(x)]^5 (³√7 + t²) dt can be found using the Fundamental Theorem of Calculus and the chain rule. Therefore,  we can write the derivative of the function 9(x) as 9'(x) = (³√7 + sin(x)²) * cos(x).

Let's denote the integral part as F(t), so F(t) = ∫[sin(x)]^5 (³√7 + t²) dt. According to the Fundamental Theorem of Calculus, if F(t) is the integral of a function f(t), then the derivative of F(t) with respect to x is f(t) multiplied by the derivative of t with respect to x. In this case, the derivative of F(t) with respect to x is (³√7 + t²) multiplied by the derivative of sin(x) with respect to x.

Using the chain rule, the derivative of sin(x) with respect to x is cos(x). Therefore, the derivative of F(t) with respect to x is (³√7 + t²) * cos(x).

Finally, we can write the derivative of the function 9(x) as 9'(x) = (³√7 + sin(x)²) * cos(x).

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Let R be a relation on the set of integers where a Rb a = b ( mod 5) Mark only the correct statements. Hint: There are ten correct statements. The composition of R with itself is R The inverse of R is R R is transitive For all integers a, b, c and d, if aRb and cRd then (a-c)R(b-d) (8,1) is a member of R. The equivalence class [0] = [4]. R is reflexive The union of the classes [-15],[-13].[-11],[1], and [18] is the set of integers. 1R8. The equivalence class [-2] = [3]. The complement of R is R Ris antisymmetric The union of the classes [1],[2],[3] and [4] is the set of integers. The intersection of [-2] and [3] is the empty set. R is irreflexive R is asymmetric Ris symmetric The equivalence class [-2] is a subset of the integers. The equivalence class [1] is a subset of R. R is an equivalence relation on the set of integers.

Answers

There are ten correct statements for the equivalence relation on the set of integers :

1. The composition of R with itself is R.

2. R is transitive.

3. For all integers a, b, c, and d, if aRb and cRd, then (a-c)R(b-d).

4. (8,1) is a member of R.

5. [0] = [4].

6. R is reflexive.

7. The union of the classes [-15],[-13].[-11],[1], and [18] is the set of integers.

8. The equivalence class [-2] = [3].

9. The union of the classes [1],[2],[3] and [4] is the set of integers.

10. The intersection of [-2] and [3] is the empty set.

Let R be are relation on the set of integes where a Rb a = b ( mod 5) Mark the correct statements.

An equivalence relation is a binary relation between two elements in a set, which satisfies three conditions - reflexivity, symmetry, and transitivity.

A binary relation R on a set A is said to be symmetric if, for every pair of elements a, b ∈ A, if a is related to b, then b is related to a.

If R is a symmetric relation, then aRb implies bRa. R is symmetric as aRb = bRa.

Therefore, statement 11 is true.A binary relation R on a set A is said to be transitive if, for every triple of elements a, b, c ∈ A, if a is related to b, and b is related to c, then a is related to c.

If R is a transitive relation, then aRb and bRc imply aRc.

R is transitive because (a = b mod 5) and (b = c mod 5) implies that (a = c mod 5).

Therefore, statement 2 is true.

If a relation R is reflexive, it holds true for any element a in A that aRa

. The relation is reflexive because a R a = a-a = 0 mod 5, and 0 mod 5 = 0. Therefore, statement 6 is true.

A relation R is said to be antisymmetric if, for every pair of distinct elements a and b in A, if a is related to b, then b is not related to a.

The relation R is antisymmetric because it is reflexive and the pairs (1, 4) and (4, 1) can’t exist. Therefore, statement 12 is true.

The equivalence class [-2] = {…-12, -7, -2, 3, 8…}, and

[3] = {…-17, -12, -7, -2, 3, 8…}.

So, both sets are equal, so statement 8 is true.

The union of the classes [-15], [-13], [-11], [1], and [18] is the set of integers.

Therefore, statement 7 is true.

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Consider the following linear program:
Minimize Subject to:
z = 2x₁ + 3x₂
2X₁ - X₂ - X3 ≥ 3,
x₁ - x₂ + x3 ≥ 2,
X1, X₂ ≥ 0.

(a) Solve the above linear program using the primal simplex method.
(b) Solve the above linear program using the dual simplex method.
(c) Use duality theory and your answer to parts (a) and (b) to find an optimal solution of the dual linear program. DO NOT solve the dual problem directly!

Answers

a) The optimal solution is:

z = 5,

x1 = 5,

x2 = 1,

x3 = 0,

x4 = 0, and

x5 = 0.

b) Since all the coefficients in the objective row are non-negative, the current solution is optimal.

c)The optimal solution is

z = 1.5,

y1 = 3/2, and

y2 = 0.

Explanation:

(a) Primal simplex method:

Solving the linear program using the primal simplex method:

Minimize Subject to:  

   z = 2x₁ + 3x₂2X₁ - X₂ - X3 ≥ 3, x₁ - x₂ + x3 ≥ 2,

   X1, X₂ ≥ 0.

Convert the inequalities into equations, by introducing slack variables:

2X₁ - X₂ - X3 + x4 = 3, x₁ - x₂ + x3 + x5 = 2,

X1, X₂, x4, x5 ≥ 0.

Write the augmented matrix:

[tex]\begin{bmatrix} 2 & -1 & -1 & 1 & 0 & 3 \\ 1 & -1 & 1 & 0 & 1 & 2 \\ -2 & -3 & 0 & 0 & 0 & 0 \end{bmatrix}[/tex]

Since the objective function is to be minimized, the largest coefficient in the bottom row of the tableau is selected.

In this case, the most negative value is -3 in column 2.

Row operations are performed to make all the coefficients in the pivot column equal to zero, except for the pivot element, which is made equal to 1.

These operations yield:

[tex]\begin{bmatrix} 1 & 0 & -1 & 2 & 0 & 5 \\ 0 & 1 & -1 & 1 & 0 & 1 \\ 0 & 0 & -3 & 5 & 1 & 10 \end{bmatrix}[/tex]

Thus, the optimal solution is:

z = 5,

x1 = 5,

x2 = 1,

x3 = 0,

x4 = 0, and

x5 = 0.

(b) Dual simplex method:

Solving the linear program using the dual simplex method:

Minimize Subject to:

z = 2x₁ + 3x₂2X₁ - X₂ - X3 ≥ 3, x₁ - x₂ + x3 ≥ 2,

X1, X₂ ≥ 0.

The dual of the given linear program is:

Maximize Subject to:

3y₁ + 2y₂ ≥ 2, -y₁ - y₂ ≥ 3, -y₁ + y₂ ≥ 0, y₁, y₂ ≥ 0.

Write the initial tableau in terms of the dual problem:

[tex]\begin{bmatrix} 3 & 2 & 0 & 1 & 0 & 0 & 2 \\ -1 & -1 & 0 & 0 & 1 & 0 & 3 \\ -1 & 1 & 0 & 0 & 0 & 1 & 0 \end{bmatrix}[/tex]

The most negative element in the bottom row is -2 in column 2, which is chosen as the pivot.

Row operations are performed to obtain the following tableau:

[tex]\begin{bmatrix} 0 & 4 & 0 & 1 & -2 & 0 & -4 \\ 0 & 1 & 0 & 1 & -1 & 0 & -3 \\ 1 & 1/2 & 0 & 0.5 & -0.5 & 0 & 1.5 \end{bmatrix}[/tex]

Since all the coefficients in the objective row are non-negative, the current solution is optimal.

c)The optimal solution is

z = 1.5,

y1 = 3/2, and

y2 = 0.

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An auto insurance policy will pay for damage to both the policyholder's car and the driver's car when the policyholder is responsible for an accident. The size of the payment damage to the policyholder's car, X, is uniformly distributed on the interval (0,1) Given X = x, the size of the payment for damage to the other driver's car, Y is uniformly disTRIBUTED on the interval (x, x +1) such that that the joint density function of X and y satisfies the requirement x < y < x+1. An accident took place and the policyholder was responsible for it. a) Find the probability that the payment for damage to the policyholder's car is less than 0.5. b) Calculate the probability that the payment for damage to the policyholder's car is than 0.5 and the payment for damage to the other driver's car is greater than 0.5.

Answers

a) The probability that the payment for damage to the policyholder's car, X, is less than 0.5 can be calculated by finding the area under the joint density function curve where X is less than 0.5.

Since X is uniformly distributed on the interval (0,1), the probability can be determined by calculating the area of the triangle formed by the points (0, 0), (0.5, 0), and (0.5, 1). The area of this triangle is (0.5 * 0.5) / 2 = 0.125. Therefore, the probability that the payment for damage to the policyholder's car is less than 0.5 is 0.125. The probability that the payment for damage to the policyholder's car is less than 0.5 is 0.125. This probability is obtained by calculating the area of the triangle formed by the points (0, 0), (0.5, 0), and (0.5, 1), which represents the joint density function curve for X and Y. The area of the triangle is (0.5 * 0.5) / 2 = 0.125.

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Tia and Ken each sold snack bars and magazine subscriptions for a school fundraiser, as shown in the table on the left. Tia earned $132 and Ken earned $190. Select the two equations which will make up the system of equations to formulate a system of linear equations from this situation. Item Number Sold Tia Ken Snack bars 16 20 Magazine subscriptions 4 6 a. 16s+20m = $132
b. 16s+ 4m = $132 c. 16s+20m = $190 d. 20s +6m = $190
e. 04s + 6m = $132 f. 48 +6m = $190

Answers

Let's write the system of linear equations for Tia and Ken.Step 1: Assign variablesLet "s" be the number of snack bars sold.Let "m" be the number of magazine subscriptions sold

Step 2: Write an equation for TiaTia earned $132, so we can write:16s + 4m = 132Step 3: Write an equation for KenKen earned $190, so we can write:20s + 6m = 190Therefore, the two equations which will make up the system of equations to formulate a system of linear equations from this situation are:16s + 4m = 13220s + 6m = 190Option (B) 16s + 4m = $132, and option (D) 20s + 6m = $190 are the two equations which will make up the system of equations to formulate a system of linear equations from this situation.

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Find all solutions to the following systems of congruences. (a) x = 2 x=43 (b) x = 4 X = 1 x = 3 (
c) x =ıs 11 x = 20 16

Answers

The solutions to the given systems of congruences are:

[tex](a) x = 2(b) x ≡ 711 (mod 504)(c) x ≡ 71 (mod 100)[/tex]

(a) To solve the system of congruences x ≡ 2 (mod 43), we only have one congruence here, so x = 2 is the solution.

(b) To solve the system of congruences x ≡ 4 (mod 9) x ≡ 1 (mod 8) x ≡ 3 (mod 7), we will use the Chinese Remainder Theorem. We can first check that gcd(9,8) = 1, gcd(9,7) = 1, and gcd(8,7) = 1, so these moduli are pairwise relatively prime.

Let N = 9 x 8 x 7 = 504.

Then we have the following system of equations:

x ≡ 4 (mod 9) => x ≡ 56 (mod 504) [multiply both sides by 56]x ≡ 1 (mod 8) => x ≡ 315 (mod 504) [multiply both sides by 315]x ≡ 3 (mod 7) => x ≡ 390 (mod 504) [multiply both sides by 390]

Then we can write the solution as:x ≡ (4 x 56 x 63 + 1 x 315 x 63 + 3 x 390 x 72) (mod 504)x ≡ 1287 (mod 504) => x ≡ 711 (mod 504).

Therefore, the solutions to the system of congruences in (b) are x ≡ 711 (mod 504).

We can also verify that x = 711 satisfies all three congruences in the system, so this is the unique solution.

(c) To solve the system of congruences x ≡ 11 (mod 20) x ≡ 16 (mod 25), we will again use the Chinese Remainder Theorem.

We can first check that gcd(20,25) = 5, so we will have a unique solution modulo 5, but not necessarily modulo 20 or 25.

Let's first find the solution modulo 5. From the second congruence, we have x ≡ 1 (mod 5).

Then from the first congruence, we can write x = 20k + 11 for some integer k.

Substituting this into x ≡ 1 (mod 5), we have:20k + 11 ≡ 1 (mod 5) => k ≡ 3 (mod 5) => k = 5m + 3 for some integer m.

Then we can write x = 20k + 11 = 100m + 71.

So any solution to the given system of congruences will be of the form:x ≡ 71 (mod 100)We can also verify that x = 71 satisfies both congruences in the system, so this is the unique solution.

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10 Points: Q5) A company that manufactures laser printers for computers has monthly fixed Costs of $177,000 and variable costs of $650 per unit produced. The company sells the printers for $1250 per unit. How many printers must be sold each month for the company to break even?

Answers

To find the break-even point, we need to determine the number of printers that need to be sold each month. The company must sell approximately 295 printers each month to break even.


To break even, the company must sell enough laser printers to cover both fixed costs and variable costs. In this case, the company has fixed costs of $177,000 and variable costs of $650 per unit produced. The selling price per unit is $1250. To find the break-even point, we need to determine the number of printers that need to be sold each month.

Let's denote the number of printers to be sold each month as x. The total cost (TC) can be calculated as the sum of fixed costs (FC) and variable costs (VC) multiplied by the number of units produced (x):

TC = FC + VC * x

Substituting the given values, we have:

TC = $177,000 + $650x

The revenue (R) can be calculated by multiplying the selling price (SP) per unit by the number of units sold (x):

R = SP * x

Substituting the given selling price of $1250, we have:

R = $1250 * x

To break even, the revenue must cover the total cost:

R = TC

$1250 * x = $177,000 + $650x

Simplifying the equation, we can isolate x to find the break-even point:

$1250x - $650x = $177,000

$600x = $177,000

x = $177,000 / $600

x ≈ 295

Therefore, the company must sell approximately 295 printers each month to break even.

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A simple random sample from a population with a normal distribution of 102 body temperatures has x-98.20°F and s-0.63°F. Construct a 90% confidence interval estimate of the standard deviation of body temperature of all healthy humans. Click the icon to view the table of Chi-Square critical values. °F

Answers

To construct a confidence interval for the standard deviation of body temperature, we can use the chi-square distribution.

Given:

Sample size (n) = 102

Sample standard deviation (s) = 0.63°F

We want to construct a 90% confidence interval, which means that the confidence level (1 - α) is 0.90. Since we are estimating the standard deviation, we will use the chi-square distribution.

The formula for the confidence interval of the standard deviation is:

Lower Limit ≤ σ ≤ Upper Limit

To calculate the lower and upper limits, we need the critical values from the chi-square distribution table. Since the sample size is large (n > 30) and the population is assumed to be normally distributed, we can use the chi-square distribution to estimate the standard deviation.

From the chi-square distribution table, the critical values for a 90% confidence level with (n - 1) degrees of freedom are 78.231 and 127.553.

The lower limit (LL) and upper limit (UL) of the confidence interval can be calculated as follows:

[tex]LL = \frac{{(n - 1) \cdot s^2}}{{\chi^2(\frac{{\alpha}}{{2}})}}[/tex]

[tex]UL = \frac{{(n - 1) \cdot s^2}}{{\chi^2(1 - \frac{{\alpha}}{{2}})}}[/tex]

Substituting the given values, we have:

[tex]LL = \frac{{(102 - 1) \cdot (0.63)^2}}{{127.553}} \approx 0.296[/tex]

[tex]UL = \frac{{(102 - 1) \cdot (0.63)^2}}{{78.231}} \approx 0.479[/tex]

Therefore, the 90% confidence interval estimate of the standard deviation of body temperature of all healthy humans is approximately 0.296°F to 0.479°F.

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b
Write the equation of the conic section shown below. 10 -10--9 37 focus 4
Determine the equation of the parabola that opens up, has focus (-2, 7), and a focal diameter of 24.

Answers

The equation of the parabola that opens up, has focus (-2, 7), and a focal diameter of 24 is: (x + 2)² = 4p(y - 7)

What is the derivative of the function f(x) = 3x^2 - 2x + 5?

To write the equation of a conic section or determine the equation of a parabola, you typically need specific information about its shape, orientation, and key points.

This can include the coordinates of the focus, vertex, directrix, and other relevant parameters.

In the case of a conic section, such as a parabola, ellipse, or hyperbola, the equation describes the relationship between the x and y coordinates of points on the curve.

The specific form of the equation depends on the type of conic section.

For a parabola, the general equation in standard form is y = ax² + bx + c or x = ay² + by + c, depending on whether it opens vertically or horizontally.

The values of a, b, and c determine the shape, orientation, and position of the parabola.

To determine the equation of a parabola, you typically need information such as the focus, vertex, or focal diameter.

Using this information, you can derive the equation by applying the appropriate formulas or geometric properties.

If you can provide the specific information related to the conic section or parabola you are referring to, I can provide a more detailed explanation or guide you through the process of finding the equation.

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A survey of property owners' opinions about a street-widening project was taken to determine if owners' opinions were related to the distance between their home and the street. A randomly selected sample of 100 property owners was contacted and the results are shown next. Opinion Front Footage For Undecided Against Under 45 feet 12 4 4 45-120 feet 35 5 30 Over 120 feet 3 2 5 What is the expected frequency for people who are undecided about the project and have property front-footage between 45 and 120 feet? Seleccione una:
A. 7.7
B. 5.0
C. 2.2
D. 3.9

Answers

The expected frequency for people who are undecided about the project and have property front-footage between 45 and 120 feet is 7.7.

How to solve for  expected frequency

First, you need to calculate the row totals, column totals, and the grand total from the provided data.

Row Totals:

Under 45 feet: 12 + 4 + 4 = 20

45-120 feet: 35 + 5 + 30 = 70

Over 120 feet: 3 + 2 + 5 = 10

Column Totals:

For: 12 + 35 + 3 = 50

Undecided: 4 + 5 + 2 = 11

Against: 4 + 30 + 5 = 39

Grand Total: 20 + 70 + 10 = 100

Then, the expected frequency for the specified group can be calculated as:

Expected Frequency = (Row Total for 45-120 feet * Column Total for Undecided) / Grand Total

= (70 * 11) / 100 = 7.7

The expected frequency for people who are undecided about the project and have property front-footage between 45 and 120 feet is 7.7.

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Get a similar question You can retry this question below The average THC content of marijuana sold on the street is 9.8%. Suppose the THC content is normally distributed with standard deviation of 2%. Let X be the THC content for a randomly selected bag of marijuana that is sold on the street. Round all answers to 4 decimal places where possible, a. What is the distribution of X? X - NO b. Find the probability that a randomly selected bag of marijuana sold on the street will have a THC content greater than 9.1. c. Find the 64th percentile for this distribution. % Hint: Helpful videos: • Find a Probability [+] 7 Finding a Value Given a Probability [+] Hint Submit

Answers

The distribution of X is normally distributed.

The given information states that the THC content of marijuana sold on the street is normally distributed with a mean of 9.8% and a standard deviation of 2%. This means that the THC content follows a bell-shaped curve, where the majority of values will be around the mean of 9.8%.

In statistical terms, we can represent the THC content as a random variable X. Since X is normally distributed, we can use the notation X ~ N(9.8, 0.02^2), where N represents the normal distribution, 9.8 is the mean, and 0.02 is the standard deviation.

To find the probability that a randomly selected bag of marijuana sold on the street will have a THC content greater than 9.1, we need to calculate the area under the curve to the right of 9.1. This can be done by finding the z-score corresponding to 9.1, which measures the number of standard deviations a value is away from the mean. Using the formula z = (X - μ) / σ, we can calculate the z-score as (9.1 - 9.8) / 0.02 = -3.5.

Now, we can use a standard normal distribution table or a calculator to find the probability associated with a z-score of -3.5. The probability corresponds to the area under the curve to the right of the z-score. In this case, the probability is approximately 0.0002327, rounded to 4 decimal places. Therefore, the probability that a randomly selected bag of marijuana sold on the street will have a THC content greater than 9.1 is approximately 0.0002.

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A says "I am a knight" and B says "A is a Knave?" therefore what
is A and B ??
The logic is Knights always tell the truth and Knaves always
lie

Answers

A is a Knave and B is a Knight. First, we need to understand the rules. The first rule is that Knights always tell the truth, while Knaves always lie.

A Knave is a person who always lies, while a Knight is a person who always tells the truth. According to the statement provided in the question, A claims to be a Knight, and B claims that A is a Knave. If A is a Knight, he must be telling the truth; as a result, B's statement must be false. As a result, if A is a Knight, B must be a Knave. If A is a Knave, he must be lying, so his statement cannot be true. As a result, B's statement must be true, implying that A is, in fact, a Knave. As a result, we can deduce that A is a Knave and B is a Knight.

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The records of a casualty insurance company show that, in the past, its clients have had a mean of 1.7 auto accidents per day with a variance of 0.0036. The actuaries of the company claim that the variance of the number of accidents per day is no longer equal to 0.0036. Suppose that we want to carry out a hypothesis test to see if there is support for the actuaries' claim. State the null hypothesis and the alternative hypothesis that we would use for this test.

Answers

Null hypothesis is the variance of the number of accidents per day would still be equal to 0.0036.

Alternative hypothesis is the variance of the number of accidents per day would not be equal to 0.0036

How to determine the hypotheses

From the information given, we have that;

Mean = 1.70 auto accidents

The value of the variance = 0. 0036

Then, we have;

Null hypothesis (H0) for this hypothesis test should be that the variance of the number of accidents per day would still be equal to 0.0036.

This is written as;

H0: σ² = 0.0036

Now, for the alternative hypothesis, we have;

Alternative hypothesis (H1) would be that the variance of the number of accidents per day would not be equal to 0.0036,

This is written as;

H1:σ² ≠ 0.0036

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way to the sta in a cinical trial of the drug, 20 of 264 treated subjects experienced headaches (based on data from the manufacturer). The accompanying calculator display shows results from a test of the claim that less than 11% of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.01 significance level to complete parts (a) through (e) below.
a. Is the test two-tailed, left-tailed, or right-tailed?
-Right tailed test
-Left-tailed test
-Two-tailed test

Answers

The test described in the scenario is a left-tailed test. In a left-tailed test, the null hypothesis is typically that the parameter being tested is greater than or equal to a certain value.

While the alternative hypothesis is that the parameter is less than that value. In this case, the claim is that less than 11% of treated subjects experienced headaches, so we are testing whether the proportion of headaches in the treated subjects is less than 11%. The alternative hypothesis is that the proportion is indeed less than 11%.

The significance level is set at 0.01, which indicates that we have a small tolerance for Type I error. Therefore, the test is specifically focused on detecting evidence of a lower proportion of headaches in the treated subjects.

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Homework Part 1 of 2 points Points: 0 of 1 A poll asked whether states should be allowed to conduct random drug tests on elected officials. Of 23,237 respondents, 57% said "yes." a. Determine the margin of error for a 99% confidence interval. b. Without doing any calculations, indicate whether the margin of error is larger or smaller for a 90% confidence interval. Explain your answer. Click here to view Rage 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve a. The margin of error for a 99% confidence interval is (Round to three decimal places as needed.)

Answers

The margin of error for a 99% confidence interval in this poll would be approximately ±2.14%. The margin of error for a 90% confidence interval would be larger than for a 99% confidence interval.

This is because as the confidence level increases, the margin of error also increases.

In statistical terms, the margin of error represents the range within which the true population proportion is likely to fall. It is influenced by factors such as the sample size and the desired level of confidence.

A larger sample size generally leads to a smaller margin of error, as it provides a more accurate representation of the population.

When we calculate a 99% confidence interval, we are aiming for a higher level of confidence in the results.

This means that we want to be 99% confident that the true proportion of respondents who support random drug tests on elected officials falls within the calculated range. Consequently, to achieve a higher confidence level, we need to allow for a larger margin of error. In this case, the margin of error is ±2.14%.

On the other hand, a 90% confidence interval has a lower confidence level. This means that we only need to be 90% confident that the true proportion falls within the calculated range.

As a result, we can afford a smaller margin of error. Therefore, the margin of error for a 90% confidence interval would be larger than ±2.14% obtained for the 99% confidence interval.

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Production costs for manufacturing running shoes consist of a fixed overhead (including rent, insurance, machine expenses, and other costs) of $550,000 plus variable costs of $15 per pair of shoes. The company plans to sell the shoes to Amazon for about $55 per pair of shoes.
a) Give the profit function for the shoe manufacturer. Clearly define the variables in your profit function.
(b) If Amazon buys 4000 pairs of shoes initially, describe their overall costs, revenue, and profit.

Answers

(a). The profit function for the shoe manufacturer is: Profit(q) = $40q - $550,000, the variable is q = quantity of pairs of shoes sold.
(b). Amazon's overall costs would be $610,000, revenue would be $220,000, and they would incur a loss of $390,000.

(a) The profit function for the shoe manufacturer can be expressed as:

Profit = Revenue - Total Cost

Revenue is the amount earned from selling the shoes, and it is calculated by multiplying the selling price per pair of shoes by the number of pairs sold. In this case, the selling price is $55 per pair, and the number of pairs sold is denoted by the variable 'q'.

Revenue = Price per pair * Quantity sold

Revenue = $55 * q

Total Cost consists of the fixed overhead cost plus the variable cost per pair, and it is calculated by adding the fixed overhead cost to the variable cost per pair multiplied by the number of pairs sold.

Total Cost = Fixed Overhead + Variable Cost per pair * Quantity sold

Total Cost = $550,000 + $15 * q

Now we can substitute the revenue and total cost into the profit function:

Profit = $55 * q - ($550,000 + $15 * q)

Profit = $55q - $550,000 - $15q

Profit = $40q - $550,000

Therefore, the profit function for the shoe manufacturer is:

Profit(q) = $40q - $550,000

The variables in the profit function are:

q - Quantity of pairs of shoes sold

(b) If Amazon buys 4000 pairs of shoes initially, we can calculate their overall costs, revenue, and profit.

Quantity sold (q) = 4000 pairs

Revenue = $55 * q

Revenue = $55 * 4000

Revenue = $220,000

Total Cost = $550,000 + $15 * q

Total Cost = $550,000 + $15 * 4000

Total Cost = $550,000 + $60,000

Total Cost = $610,000

Profit = Revenue - Total Cost

Profit = $220,000 - $610,000

Profit = -$390,000

Therefore,

overall costs = $610,000, revenue would be $220,000, they would incur a loss of $390,000.

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Which expression is prime? Explain your work in details. [6 points] A. 25x¹ - 16 B. x² 16x + 1 - C. x5 + 8x³ - 2x² - 16 D. x6x³ - 20

Answers

A prime expression refers to an expression that has only two factors, 1 and the expression itself, and it is impossible to factor it in any other way.

In order to determine the prime expression out of the given options, let's examine each option carefully.A. 25x¹ - 16If we factor this expression by the difference of two squares, we obtain (5x - 4)(5x + 4). Therefore, this expression is not a prime number.B. x² 16x + 1If we try to factor this expression, we will find that it is impossible to factor. We could, however, make use of the quadratic formula to determine the values of x that solve this equation. Therefore, this expression is a prime number.C. x5 + 8x³ - 2x² - 16.

If we use factorization by grouping, we can factor the expression to obtain: x³(x² + 8) - 2(x² + 8). This expression can be further factorized to (x³ - 2)(x² + 8). Therefore, this expression is not a prime number.D. x6x³ - 20We can factor out x³ from the expression to obtain x³(x³ - 20/x³). Since we can further factor 20 into 2² × 5, we can simplify the expression to x³(x³ - 2² × 5/x³) = x³(x³ - 2² × 5/x³). Therefore, this expression is not a prime number.Out of the given options, only option B is a prime expression since it cannot be factored in any other way. Therefore, option B, x² 16x + 1, is the prime expression among the given options.

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Connie’s first three test scores are 79%, 87%, and 98%. What must she score on her fourth test to have an overall mean of exactly 90%?

Answers

Step-by-step explanation:

You want the average of FOUR test scores to equal 90 :

( 79 + 87 + 98 + x ) / 4 = 90      ( assuming they are all weighted equally)

 x = 90*4  - 79 - 87 - 98   = 96 % needed

8) Let g(x)=-x-2+3 a. Determine the common function of g(x). [1 pt] [1 pt] b. Usex=-2, –1, 0, 1, 2 to determine points of the common function. C. Use the points of the common function found in part

Answers

Given that the function g(x) = -x - 2 + 3. We have to determine the common function of g(x) and find points of the common function when x = -2, -1, 0, 1, 2.

The common function of g(x) is the parent function f(x) = -x. Since a common function is a parent function with some horizontal or vertical shift.The common function of g(x) = -x.

The function

g(x) = -x - 2 + 3 is in the form of f(x) + c, where

c = -2 + 3 = 1. Thus, the function f(x) can be determined by dropping the constant c from the given function g(x).Thus, the common function of g(x) is the parent function

f(x) = -x. Since a common function is a parent function with some horizontal or vertical shift.Using

x = -2, -1, 0, 1, 2, we can find the points of the common function as follows:f(-2) = -(-2)

= 2f(-1) = -(-1)

= 1f(0) = -(0)

= 0f(1) = -(1) =

-1f(2) = -(2) = -2

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use the given zero to find the remaining zeros of the function.
h(x) = 4x^(5)+6x^(4)+36x^(3)+54x^(2)-448x-672 zero:-4i

Answers

The zeros of the function are: -4i, 4i, -3, 2 and (7 - 3√17)/4. Given function is h(x) = 4x⁵ + 6x⁴ + 36x³ + 54x² - 448x - 672. Zero is -4i. Therefore, the remaining zeros of the given function can be determined by dividing the given polynomial function by (x - zero).Since the given zero is -4i.

We get:4x⁴ - 14x³ - 14x² + 66x + 168 - 64i.The quotient obtained after division is 4x⁴ - 14x³ - 14x² + 66x + 168 and -64i is the remainder. Since the degree of the quotient obtained is four, we need to find its remaining zeros which are complex or real.For finding the remaining zeros, we need to solve the equation: 4x⁴ - 14x³ - 14x² + 66x + 168 = 0.Thus, the remaining zeros are real and can be found by factoring the polynomial:4x⁴ - 14x³ - 14x² + 66x + 168= 2(x - 2)(x + 3)(2x² - 7x - 14).

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If a and bare unit vectors, and a + b = √3, determine (2ä - 5b). (a + 3b)

Answers

The solution of the given expression  (2a - 5b). (a + 3b) is simplified as ab - 13.

What are the solution of the expression?

The solution of the given expression is calculated as follows;

The given expressions

a + b = √3

To determine  (2a - 5b). (a + 3b)

We will simplify the expression as follows;

(a + b)² = (√3)²

a² + 2ab + b² = 3  ----- (1)

Since a and b are unit vectors,  we will have;

a² = b² = 1

Substitute the values of a²  and b² into the equation;

1 + 2ab + 1 = 3

2ab + 2 = 3

2ab = 3 - 2

2ab = 1

ab = 1/2

The given expression to be simplified;

= (2a - 5b) . (a + 3b)

= (2a . a) + (2a . 3b) + (-5b . a) + (-5b . 3b)

= 2a² + 6ab - 5ab - 15b²

= 2(1) + ab - 15(1)

= 2 + ab - 15

= ab - 13

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Technique To Solve Use Laplace Transformation The Initial Value Problem Below.
y"-4y = eˆ3t
y (0) = 0
y' (0) = 0

Answers

To solve the initial value problem y'' - 4y = e^(3t) with the initial conditions y(0) = 0 and y'(0) = 0 using Laplace transformation, we follow these steps:

 

Apply the Laplace transform to both sides of the differential equation:

Taking the Laplace transform of the given differential equation, we get s^2Y(s) - 4Y(s) = 1/(s - 3), where Y(s) represents the Laplace transform of y(t) and s is the Laplace variable.

Solve the algebraic equation in the Laplace domain:

Rearranging the equation, we have Y(s) * (s^2 - 4) = 1/(s - 3). Solving for Y(s), we find Y(s) = 1/[(s - 3)(s^2 - 4)].

Decompose Y(s) using partial fraction decomposition:

Express Y(s) as a sum of partial fractions: Y(s) = A/(s - 3) + (Bs + C)/(s^2 - 4), where A, B, and C are constants to be determined.

Determine the values of A, B, and C:

To find the values of A, B, and C, we equate the coefficients of like powers lof s on both sides of the equation. Multiplying both sides by the common denominator, we can compare the coefficients and solve for the constants A, B, and C.

Take the inverse Laplace transform:

Having obtained the decomposition of Y(s) and determined the values of A, B, and C, we can now take the inverse Laplace transform to obtain the solution y(t) in the time domain. Utilize Laplace transform tables or a computer algebra system to find the inverse Laplace transform.

Apply the initial conditions:

To find the specific solution satisfying the initial conditions y(0) = 0 and y'(0) = 0, substitute these values into the obtained solution y(t) and solve for any remaining unknowns. By substituting t = 0 into y(t) and its derivative, we can determine the values of A, B, and C, thereby obtaining the unique solution to the initial value problem.

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ABC company manufactures two type of products product Y product X, and applies manufacturing overhead to all units at the rate of $80 per machine hour. Below are the production information Product Y Product X Direct material $40 $65 Direct labor $25 $25 Budgeted volume (units) 16,000 30,000 Manufacturing setup Product shipping $1,120,000 Cost $1,344,000 Cost driver Number of setup Outgoing shipments Product Y Product X 100 60 Number of setup Machine hour 32,000 45,000 200 150 Outgoing shipments . Compute the product cost per unit for each type of product under the traditional and ABC method. Machine processing $3,696,000 Machine hour DETAILS MY NOTES ASK YOUR TEACHER Justin purchased his dream car worth $18500 on a finance for 4 years. He was offered 6% interest rate. Find his monthly installments. (1) Identify the letters used in the formula 1=Prt. P= $ and t (2) Find the interest amount. I = $ (3) Find the total loan amount. 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