For the function f(x) = 2x^4 – 26x^2 + 72 a. Determine the domain of the function. [1] b. Determine the intercepts. [3] c. Determine all critical points and intervals of increase and decrease. [6] d. Determine the points of inflection and intervals of concavity. [5] e. Sketch the function. [3]

Answer:

13 = x

Step-by-step explanation:

Remark

The six exterior angles add up to 360. In fact the exterior angles of any closed convex figure adds up to 360.

You can try this with simple figures. An equalateral triangle has 3 equal exteror angles. They are all 120 degrees 3*120 = 360

A square has 4 exterior angles. All 4 of them are 90 degrees. The sum of them is 90 * 4 = 360

Givens

Angles

The Total is 360 degrees

Solution

3x + 6 + 7x - 11 + 62 + 4x + 7 + 6x - 5 + 41 = 360    Combine like terms

20x + 100 = 360                  Subtract 100 from both sides

20x = 360 - 100

20x = 260

x = 13

Check

Answer:

sin(B) = cos(90 - B).

Step-by-step explanation:

To answer this question, you must understand SOH CAH TOA.

SOH = Sine; Opposite divided by Hypotenuse

CAH = Cosine; Adjacent divided by Hypotenuse

TOA = Tangent; Opposite divided by Adjacent

I roughly drew a triangle for reference. Let's say we have a 3-4-5 triangle.

As you can see, sin(b) does not equal sin(a). To get the sine of an angle, you would do opposite over hypotenuse. For angle B, that would be 3/5, while for angle A, that would be 4/5.

As stated above, sin(B) is 3/5. Now, if you did cos(90 - B), it would be the same thing as cos(A). This is because the triangle is a right triangle. Since a triangle has 180 degrees, and one angle is a right triangle, the other two angles will add up to be 90 degrees. So, 90 - B = A. cos(A) is the same thing as adjacent over hypotenuse, which is 3/5. So, sin(B) = cos(90 - B) must be true.

Let's just check the others to make sure they are false.

cos(B) = 4/5.

sin(180 - B) is basically the same thing as sin(A + C), which is definitely NOT 4/5.

cos(B) = 4/5, which is NOT the same as A.

So, your answer is sin(B) = cos(90 - B).

Hope this helps!

Answer:

40 cm^2

Step-by-step explanation:

Area of rectangle = length * width.
Area of square = length^2

To find the area of the given shape, we must subtract the area of the square from the area of the rectangle.

Area of the given rectangle = 8 * 7 = 56 cm^2
Area of the given square = 4^2 = 16 cm^2

56 - 16 = 40 cm^2

There are 2520 ways to divide the 10 distinct books among the three students with the given distribution.

To find the number of ways to divide 10 distinct books among three students with the given distribution (5 books for the first student, 3 books for the second, and 2 books for the third), you can use the combination formula:

C(n, r) = n! / (r! * (n - r)!)

Where "C" represents the number of combinations, "n" is the total number of items, and "r" is the number of items to choose. We'll apply this formula to each student's distribution, and then multiply the results to find the total number of ways.

1. First student (5 books from 10):
C(10, 5) = 10! / (5! * (10 - 5)!) = 252

2. Second student (3 books from the remaining 5):
C(5, 3) = 5! / (3! * (5 - 3)!) = 10

3. Third student (2 books from the remaining 2):
C(2, 2) = 2! / (2! * (2 - 2)!) = 1

Now multiply the results for each student:
Total number of ways = 252 * 10 * 1 = 2520

So, there are 2520 ways to divide the 10 distinct books among the three students with the given distribution.

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Answer:

Step-by-step explanation:

(2 1/2) : (1/4) = 10/1 =10

To find the value of the effective spring constant (k), we are given the masses of oxygen (16.0 atomic mass units) and carbon (12.0 atomic mass units). We will use this information to determine the value of k.

The effective spring constant (k) is a measure of the stiffness of the spring and is usually given in units of force per unit length or mass per unit time squared. In this case, we need to determine k based on the masses of oxygen and carbon.

To find k, we can use the formula for the effective spring constant in a molecular vibration system, which is given by:

K = (ω^2)(μ)

Where ω is the angular frequency of the vibration and μ is the reduced mass of the system.

Since we are given the masses of oxygen and carbon, we can calculate the reduced mass (μ) as follows:

Μ = (m1 * m2) / (m1 + m2)

Where m1 and m2 are the masses of oxygen and carbon, respectively.

Using the given masses:
M1 = 16.0 atomic mass units (oxygen)
M2 = 12.0 atomic mass units (carbon)

We can substitute these values into the equation for μ:

Μ = (16.0 * 12.0) / (16.0 + 12.0)
= 192.0 / 28.0
≈ 6.857 atomic mass units

Now, to find the value of k, we need the angular frequency (ω) of the vibration. Unfortunately, the angular frequency is not provided in the given information. Without the angular frequency, we cannot determine the exact value of k.

Therefore, we can calculate the reduced mass (μ) using the given masses of oxygen and carbon, but we cannot find the value of k without the angular frequency.

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Answer:

59.0

Step-by-step explanation:

Given a right angled triangle, ∆XYZ, to know which trigonometric ratio formula to apply in finding the measure of angle X, note the following:

Opposite side to angle X = 6

Hypotenuse = 7

Therefore, we would apply the following trigonometric ratio formula to solve for m<X:

\( sin X = \frac{6}{7} \)

\( sin X = 0.8571 \)

\( X = sin^{-1}(0.8571) \)

\( X = 58.99 \)

\( m < X = 59.0 \) (rounded to nearest tenth)

Answer:

10m

Step-by-step explanation:

5x2=10 and it's in meters so ya

1. The prime cost per cleaning is $249,900 / 9,000 = $27.77

2. The conversion cost per cleaning is $243,600 / 9,000 = $27.07

3. The total variable cost per cleaning is $262,500 / 9,000 = $29.17

4. The total service cost per cleaning is $276,900 / 9,000 = $30.77

5. The fixed overhead cost would increase by $900.

1. Prime cost per cleaning:

Prime cost includes direct materials and direct labor.

Prime cost = Direct materials + Direct labor

Prime cost = $18,900 + $231,000

Prime cost = $249,900

Therefore, the prime cost per cleaning is $249,900 / 9,000 = $27.77 (rounded to the nearest cent).

2. Conversion cost per cleaning:

Conversion cost includes direct labor and variable overhead.

Conversion cost = Direct labor + Variable overhead

Conversion cost = $231,000 + $12,600

Conversion cost = $243,600

Therefore, the conversion cost per cleaning is $243,600 / 9,000 = $27.07 (rounded to the nearest cent).

3. Total variable cost per cleaning:

Total variable cost includes direct materials, direct labor, and variable overhead.

Total variable cost = Direct materials + Direct labor + Variable overhead

Total variable cost = $18,900 + $231,000 + $12,600

Total variable cost = $262,500

Therefore, the total variable cost per cleaning is $262,500 / 9,000 = $29.17 (rounded to the nearest cent).

4. Total service cost per cleaning:

Total service cost includes direct materials, direct labor, variable overhead, and fixed overhead.

Total service cost = Direct materials + Direct labor + Variable overhead + Fixed overhead

Total service cost = $18,900 + $231,000 + $12,600 + $14,400

Total service cost = $276,900

Therefore, the total service cost per cleaning is $276,900 / 9,000 = $30.77 (rounded to the nearest cent).

5. If the rent on the office increased by $900, it would affect HHH's fixed overhead cost. The fixed overhead cost would increase by $900. This would lead to an increase in the total service cost per cleaning, as the fixed overhead is a component of the total service cost.

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Answer:

(-3.5,-2)

Step-by-step explanation:

Answer:

In the first ‘choose’ put -2

In the second ‘choose’ put -3.5

The equation or rule that represents the nth term of the given sequence will be aₙ = (-1)ⁿ × [5 + (n - 1) × 5].

A sequence is a list of elements that have been ordered in a sequential manner, such that members come either before or after.

Let a₁ be the first term and d be a common difference. Then the nth term of the arithmetic sequence is given as,

aₙ = a₁ + (n - 1)d

The sequence is given as,

-5, 10, -15, 20, ......

Then the rule for the given sequence is given as,

aₙ = (-1)ⁿ × [5 + (n - 1) × 5]

The equation or rule that represents the nth term of the given sequence will be aₙ = (-1)ⁿ × [5 + (n - 1) × 5].

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B. L(x) = (6x1 + x2, -21), C. L(x) = (x1 + 8, 22), D. L(x) = (7x1, 9)^T are linear operators.

In order to determine which of the given operators in R2 are linear, we need to check if they satisfy the properties of linearity.

An operator is linear if it satisfies two conditions:

1. Additivity: L(a + b) = L(a) + L(b)
2. Homogeneity: L(c * a) = c * L(a)

Let's go through each option to determine if it is linear:

A. L(x) = (0, 10x^2)
This operator is not linear because it does not satisfy the additivity property. If we take a = (1, 1) and b = (2, 2), we have L(a + b) = L(3, 3) = (0, 10(3^2)) = (0, 90). However, L(a) + L(b) = (0, 10(1^2)) + (0, 10(2^2)) = (0, 10) + (0, 40) = (0, 50), which is not equal to (0, 90).

B. L(x) = (6x1 + x2, -21)
This operator is linear because it satisfies both the additivity and homogeneity properties. For example, if we take a = (1, 2) and b = (3, 4), we have L(a + b) = L(4, 6) = (6(4) + 6, -21) = (30, -21). And L(a) + L(b) = (6(1) + 2, -21) + (6(3) + 4, -21) = (8, -21) + (22, -21) = (30, -42), which is equal to (30, -21).

C. L(x) = (x1 + 8, 22)
This operator is linear because it satisfies both the additivity and homogeneity properties. For example, if we take a = (1, 2) and b = (3, 4), we have L(a + b) = L(4, 6) = (4 + 8, 22) = (12, 22). And L(a) + L(b) = (1 + 8, 22) + (3 + 8, 22) = (9, 22) + (11, 22) = (20, 44), which is equal to (12, 22).

D. L(x) = (7x1, 9)^T
This operator is linear because it satisfies both the additivity and homogeneity properties. For example, if we take a = (1, 2) and b = (3, 4), we have L(a + b) = L(4, 6) = (7(4), 9) = (28, 9). And L(a) + L(b) = (7(1), 9) + (7(3), 9) = (7, 9) + (21, 9) = (28, 18), which is equal to (28, 9).

In summary, options B, C, and D are linear operators, while option A is not linear.

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To estimate the minimum number of subintervals required to approximate the value of ∫ dx with an error of magnitude less than 10 using the Trapezoidal Rule and Simpson's Rule for the function f(x) = 3x + 2.

a. The error estimate formula for the Trapezoidal Rule is given by |E_T| ≤ \((b - a)^3 / (12n^2)\) * max|f''(x)|, where |E_T| represents the magnitude of the error, (b - a) is the interval length, n is the number of subintervals, and max|f''(x)| represents the maximum value of the second derivative of the function f(x) over the interval [a, b]. In this case, f''(x) = 0 since the function f(x) = 3x + 2 is a linear function. Therefore, the error estimate formula simplifies to \(|E_T| ≤ (b - a)^3 / (12n^2).\)

By setting the error magnitude less than 10 and using the formula |E_T| ≤ \((b - a)^3 / (12n^2),\)we can solve for the minimum value of n.

b. The error estimate formula for Simpson's Rule is given by |E_S| ≤ (b - a)^5 / (180n^4) * max|f⁴(x)|. Again, since f(x) = 3x + 2 is a linear function, f⁴(x) = 0. Consequently, the error estimate formula simplifies to |E_S| ≤ (b - \(a)^5 / (180n^4).\)

By setting the error magnitude less than 10 and using the formula |E_S| ≤ \((b - a)^5 / (180n^4),\)we can determine the minimum value of n.

The values obtained from these calculations represent the minimum number of subintervals needed to achieve the desired error tolerance of less than 10 for the respective integration methods.

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The series in question is:

7^(n!) * Σ((-1)^n * 2^(2n + 3)!), where n starts from 1.

To determine whether the series is conditionally convergent, absolutely convergent, or divergent, we can apply the Alternating Series Test and the Ratio Test.

Step 1: Check for convergence using the Alternating Series Test.
Since the series has an alternating sign component (-1)^n, we can check if the series satisfies the two conditions of the Alternating Series Test:
a) The absolute value of the terms decreases: |a_n+1| <= |a_n|.
b) The limit of the absolute value of the terms is zero: lim (n->∞) |a_n| = 0.

If both conditions are satisfied, then the series is conditionally convergent. If they are not satisfied, we move on to the next step.

Step 2: Check for absolute convergence using the Ratio Test.
For this, we take the absolute value of the series and analyze its convergence:
Σ|(-1)^n * 2^(2n + 3)! * 7^(n!)|.
Now, calculate the limit of the ratio of consecutive terms as n approaches infinity:
lim (n->∞) |a_(n+1) / a_n|.

If the limit is less than 1, the series is absolutely convergent. If the limit is greater than 1 or infinite, the series is divergent. If the limit is equal to 1, the Ratio Test is inconclusive.

By analyzing the convergence of the given series using these steps, you will determine whether the series is conditionally convergent, absolutely convergent, or divergent.

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Answer:

45 degrees times StartFraction pi Over 180 degrees EndFraction

Answer: c

Step-by-step explanation:

The two angles combine to form a straight angle which is 180 degrees. Therefore, the two angles are supplementary.

The area bound between the curve y = x^3 + 3x + 3 and the x-axis from x = 0 to x = 2 is 15.

To find the area, you need to integrate the function.
Step 1: Find the antiderivative of the function:
y = x^3 + 3x + 3
y' = 3x^2 + 3

The antiderivative of y' is:
F(x) = (x^3) / 3 + x^2 + x + C

Step 2: Find the area by calculating the definite integral of the antiderivative F(x) over the given interval [0, 2]:
A = ∫ F(x)dx = [ (x^3) / 3 + x^2 + x ]₀₂ = (2^3) / 3 + 2^2 + 2 - [(0^3) / 3 + 0^2 + 0 ] = 15

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Step-by-step explanation: I think not sure.

Answer: The solutions are where the graphs of the functions intersect at x = -3.464 and x = 3.464

Step-by-step explanation:

Answer:

  about 3.08 L

Step-by-step explanation:

You want the number of litres in the volume of a cylindrical can 14 cm in diameter and 20 cm high.

A litre is a cubic decimeter, 1000 cubic centimeters. As such, it is convenient to perform the volume calculation using the dimensions in decimeters:

The volume of the cylinder is given by the formula ...

  V = (π/4)d²h . . . . . . . where d is the diameter and h is the height

  V = (π/4)(1.4 dm)²(2.0 dm) ≈ 3.079 dm³ ≈ 3.08 L

The cylindrical can will hold about 3.08 litres.

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According to the given statement The probability that the sum equals Erika's age in years is 2/12, which simplifies to 1/6.

To find the probability that the sum of the numbers equals Erika's age of 14, we need to consider all possible outcomes and calculate the favorable outcomes.
First, let's consider the possible outcomes for flipping the coin. Since the coin has sides labeled 10 and 20, there are 2 possibilities: getting a 10 or getting a 20.
Next, let's consider the possible outcomes for rolling the die. Since a standard die has numbers 1 to 6, there are 6 possibilities: rolling a 1, 2, 3, 4, 5, or 6.
To find the favorable outcomes, we need to determine the combinations that would result in a sum of 14.
If Erika gets a 10 on the coin flip, she would need to roll a 4 on the die to get a sum of 14 (10 + 4 = 14).
If Erika gets a 20 on the coin flip, she would need to roll an 8 on the die to get a sum of 14 (20 + 8 = 14).
So, there are 2 favorable outcomes out of the total possible outcomes of 2 (for the coin flip) multiplied by 6 (for the die roll), which gives us 12 possible outcomes.
Therefore, the probability that the sum equals Erika's age in years is 2/12, which simplifies to 1/6.

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Answer:

4x + 8 is equivalent to the expression.

The counterclockwise circulation around c is 12 and the outward flux through c is zero.

Green's theorem is a useful tool for calculating the circulation and flux of a vector field around a closed curve in two-dimensional space.

In this case,

we have a field f=(7x−4y)i+(9y−4x)j and

a square curve c bounded by x=0, x=4, y=0, y=4.

To find the counterclockwise circulation, we can use the line integral of f along c, which is equal to the double integral of the curl of f over the region enclosed by c.

The curl of f is given by (0,0,3), so the line integral evaluates to 12.

To find the outward flux, we can use the double integral of the divergence of f over the same region, which is equal to zero since the divergence of f is also zero.

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Answer:

it would cost $285

Step-by-step explanation:

Answer:

285 po answer

Step-by-step explanation:

Pa brainlest po plsss

The factorization of x²-x will be x(x - 1 ).

Factorization or factoring in mathematics is the process of writing a number or another mathematical object as a product of several factors, usually smaller or simpler objects of the same kind.

Given that the quadratic expression is  x² - x.

To factorize x² - x, we can first factor out the common factor of x:

x² - x = x(x - 1)

So the fully factorized form of x² - x is:

x(x - 1)

Therefore, the factorized form of the expression x²-x is, x(x - 1).

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(a) The rate of change of P with respect to time is dP/dt = k(P^(1/3))^4.

(b) The solution of differential equation is P = (1/(1/3000 - t/9000000))^3.

(c) Whether or not this population size is cause for concern depends on various factors, such as the size of the swarm relative to the available resources in the surrounding environment etc.

(a) Let P(t) be the population of the swarm at time t. The rate of change of P with respect to time is proportional to the fourth power of the cubic root of its current population. Therefore, we have:

dP/dt = k(P^(1/3))^4

where k is a positive constant of proportionality.

(b) To solve the differential equation, we can use separation of variables:

dP/(P^(1/3))^4 = k dt

Integrating both sides, we get:

-3(P^(1/3))^(-3) / 3 = kt + C

where C is the constant of integration.

Using the initial condition that P(0) = 1000, we have:

-3(1000^(1/3))^(-3) / 3 = C

C = -1/3000

Substituting this value of C back into the equation, we get:

(P^(1/3))^(-3) = 1/3000 - kt/3

Raising both sides to the power of 3, we get:

P = (1/(1/3000 - kt/3))^3

Using the additional information that P(3) = 8000, we can solve for k:

8000 = (1/(1/3000 - 3k))^3

1/8000 = (1/3000 - 3k)

k = (1/9000000)

Substituting this value of k back into the equation, we get:

P = (1/(1/3000 - t/9000000))^3

(c) To determine if the concerns of the people of the nearby town are justified, we need to calculate the population of the swarm at t = 6 and compare it to some threshold value. Using the formula we derived in part (b), we have:

P(6) = (1/(1/3000 - 6/9000000))^3

P(6) ≈ 513,800

Whether or not this population size is cause for concern depends on various factors, such as the size of the swarm relative to the available resources in the surrounding environment and the potential impact on the local ecosystem.

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Answer:

72

if you need help with ratios then you can divide the smaller number by the bigger number

1. The frequency of the second harmonic is twice that of the fundamental frequency. The frequency of the second harmonic is, therefore, 120 Hz.

2. The 3rd, 9th, and 15th harmonics are triplen harmonics. Triplen harmonics are so-called because they are three times the fundamental frequency (50Hz). They are multiples of the third harmonic (150Hz) and are considered triplen harmonics.
3. A positive-rotating harmonic would be more damaging to an induction motor. Harmonics that rotate in the opposite direction to the fundamental frequency are referred to as negative-rotating harmonics. Positive-rotating harmonics are harmonics that rotate in the same direction as the fundamental frequency. Negative-sequence currents are created by negative-rotating harmonics, which cause a rotating magnetic field that rotates in the opposite direction to the fundamental frequency's magnetic field. This causes stator windings to heat up, which can cause a great deal of damage to an induction motor.
4. An ammeter should be used to determine what harmonics are present in a power system. An ammeter is used to determine the presence and quantity of current harmonics. It can also be used to compare the percentage of current distortion in the system with the maximum allowable percentage of current distortion, which is determined by the nature of the load.
5. The transformer's rating should be derated to avoid overheating. If an ammeter that indicates peak current is used instead of a true-RMS ammeter, the current reading is multiplied by 1.414 (the peak of the sine wave). The true-RMS current, on the other hand, is what creates heat in the transformer. The transformer should be derated to compensate for the current difference between the two meters. The derating factor can be found using the following equation:

true-RMS current/Peak reading x 100%. 94 A/204 A x 100%

= 46%.

The transformer should be derated by 46%.

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