Given that ƒ(x) = x2 + 1 and g(x) = –3, multiply the functions (g · ƒ)(x).

The mean of the new data set is 35 and the standard deviation is approximately 7.07.

The mean of the new data set is equal to the mean of the original data set plus 10, which is 25 + 10 = 35.

To find the standard deviation of the new data set, you can use the same formula as before:

Step 1: Calculate the mean of the data set

Mean = (40 + 30 + 45 + 35 + 25) / 5 = 35

Step 2: Calculate the deviation of each data point from the mean

Deviation of 40 from the mean = 40 - 35 = 5

Deviation of 30 from the mean = 30 - 35 = -5

Deviation of 45 from the mean = 45 - 35 = 10

Deviation of 35 from the mean = 35 - 35 = 0

Deviation of 25 from the mean = 25 - 35 = -10

Step 3: Square each deviation

Squared deviation of 5 = 5² = 25

Squared deviation of -5 = (-5)² = 25

Squared deviation of 10 = 10² = 100

Squared deviation of 0 = 0² = 0

Squared deviation of -10 = (-10)² = 100

Step 4: Calculate the variance by taking the average of the squared deviations

Variance = (25 + 25 + 100 + 0 + 100) / 5 = 50

Step 5: Take the square root of the variance to get the standard deviation

Standard deviation = 7.07

Therefore, the mean of the new data set is 35 and the standard deviation is approximately 7.07.

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For each value of x, y varies from x to 7. We can now evaluate the integral using this new order of integration.

The given integral is:

∫ from 0 to 7, ∫ from 0 to y, f(x, y) dx dy

To switch the order of integration, we need to sketch the region of integration.

The region of integration is the triangle bounded by the x-axis, y-axis, and the line y = 7. Therefore, we can rewrite the integral as:

∫ from 0 to 7, ∫ from x to 7, f(x, y) dy dx

This is because for each value of x, y varies from x to 7.

To sketch the region of integration, we draw the line y = 7 and the x-axis. Then, we draw a vertical line at x = 0 and a diagonal line from the origin to the point (7, 7) on the line y = 7. The region of integration is the triangular region bounded by these lines.

Switching the order of integration, the integral becomes:

∫ from 0 to 7, ∫ from x to 7, f(x, y) dy dx

This means that for each value of x, y varies from x to 7. We can now evaluate the integral using this new order of integration.

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1. For Joshua's triangle; the distance of the green side of the triangle d₃ is 5.

2. For Murney's triangle, the perimeter of the triangle is 12.

3. For Grace, Abby and Chris's triangle, the perimeter of the triangle is 5 + √17 +  4√2.

4. For Chloe's triangle, the perimeter of the triangle is 11 + √65.

The distance of the triangles is calculated as follows;

For Joshua's triangle;

The length of d₁, d₂, and d₃ is calculated as follows;

d₁ = √ [(3 - 2)² + (2 - 0)²] = √5

d₂ = √ [(-1 - 3)² + (4 - 2)²] = 2√5

d₃ = √ [(-1 - 2)² + (4 - 0)²] = 5

The distance of the green side of the triangle d₃ = 5

For Murney's triangle, the perimeter of the triangle is calculated as;

BC = √ [(4 - 4)² + (6 - 2)²] = 4

AC = √ [(1 - 4)² + (2 - 2)²] = 3

AB = √ [(4 - 1)² + (6 - 2)²] = 5

Perimeter = 4 + 3 + 5 = 12

For Grace, Abby and Chris's triangle, the perimeter of the triangle is calculated as;

AC = √ [(-3 - 2)² + (2-2)²] = 5

BC = √ [(1 - 2)² + (2 + 2)²] = √17

AB = √ [(1 + 3)² + (2 + 2)²] = 4√2

Perimeter = 5 + √17 +  4√2

For Chloe's triangle, the perimeter of the triangle is calculated as;

AC =  √ [(-3 - 4)² + (2-2)²] = 7

BC =  √ [(4 - 4)² + (6-2)²] = 4

AB =  √ [(4 + 3)² + (6-2)²] = √65

Perimeter = 7 + 4 + √65 = 11 + √65

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The series is convergent, as shown by the ratio test.

To apply the ratio test, we evaluate the limit of the absolute value of the ratio of successive terms as n approaches infinity:

|[(n+1)(n+2)^6 / (2n+3)(2n+2)^6] * [n(2n+2)^6 / ((n+1)(2n+3)^6)]|

= |(n+1)(n+2)^6 / (2n+3)(2n+2)^6 * n(2n+2)^6 / (n+1)(2n+3)^6]|

= |(n+1)^2 / (2n+3)(2n+2)^2] * |(2n+2)^2 / (2n+3)^2|

= |(n+1)^2 / (2n+3)(2n+2)^2| * |1 / (1 + 2/n)^2|

As n approaches infinity, the first term goes to 1/4 and the second term goes to 1, so the limit of the absolute value of the ratio is 1/4, which is less than 1. Therefore, the series converges by the ratio test.

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2, 12, 72, 432, 2592..-3, -12, -48, -192, -768..2, 4, 16, 256, 65536..1, 2, 7, 23, 76..1, 1, 4, 36, 1152..1, 2, 0, 3, 6

(1) For the sequence defined by the recurrence relation an = 6an−1, with a0 = 2, the first five terms are: a0 = 2, a1 = 6a0 = 12, a2 = 6a1 = 72, a3 = 6a2 = 432, a4 = 6a3 = 2592.

(2) For the sequence defined by the recurrence relation an = 2nan−1, with a0 = -3, the first five terms are: a0 = -3, a1 = 2na0 = 6, a2 = 2na1 = 24, a3 = 2na2 = 96, a4 = 2na3 = 384.

(3) For the sequence defined by the recurrence relation an = a^2n−1, with a1 = 2, the first five terms are: a1 = 2, a2 = a^2a1 = 4, a3 = a^2a2 = 16, a4 = a^2a3 = 256, a5 = a^2a4 = 65536.

(4) For the sequence defined by the recurrence relation an = an−1 + 3an−2, with a0 = 1 and a1 = 2, the first five terms are: a0 = 1, a1 = 2, a2 = a1 + 3a0 = 5, a3 = a2 + 3a1 = 17, a4 = a3 + 3a2 = 56.

(5) For the sequence defined by the recurrence relation an = nan−1 + n^2an−2, with a0 = 1 and a1 = 1, the first five terms are: a0 = 1, a1 = 1, a2 = 2a1 + 2a0 = 4, a3 = 3a2 + 3^2a1 = 33, a4 = 4a3 + 4^2a2 = 416.

(6) For the sequence defined by the recurrence relation an = an−1 + an−3, with a0 = 1, a1 = 2, and a2 = 0, the first five terms are: a0 = 1, a1 = 2, a2 = 0, a3 = a2 + a0 = 1, a4 = a3 + a1 = 3.

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49 and 64 are perfect squares, while 23 and 41 are not.

-If we are asked to identify a statement that is true for all of the integers 23, 41, 49, 64, one possible correct statement is: All of the integers are greater than 20.

-If we are asked to identify a statement that is false for all of the integers 23, 41, 49, 64, one possible correct statement is: All of the integers are perfect squares.

-If we are asked to identify a statement that is true for some of the integers 23, 41, 49, 64 and false for others, one possible correct statement is: Only one of the integers is a prime number. In this case, 23 and 41 are prime, while 49 and 64 are not.

-If we are asked to identify a statement that is true for any two of the integers 23, 41, 49, 64 and false for the other two, one possible correct statement is: Exactly two of the integers are perfect squares. In this case, 49 and 64 are perfect squares, while 23 and 41 are not.

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The middle 68% of the male heights from the school is given as follows:

65.5 inches to 72.5 inches.

The Empirical Rule states that, for a normally distributed random variable, the symmetric distribution of scores is presented as follows:

For the middle 68% of measures, we take the measures that are within one standard deviation of the mean, hence the bounds are given as follows:

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The value of the line integral over the curve c is 1/3 (1 - e^(-3π/2)).

The given line integral is:

∫c(x^2 + y^2)ds

where c is the curve given by x = e^(-t)cos(t), y = e^(-t)sin(t), 0 ≤ t ≤ π/2.

To evaluate this integral, we first need to find the parameterization of the curve c. We can parameterize c as follows:

r(t) = e^(-t)cos(t)i + e^(-t)sin(t)j, 0 ≤ t ≤ π/2

Then, the length of the curve c is given by:

s = ∫c ds = ∫0^(π/2) ||r'(t)|| dt

where ||r'(t)|| is the magnitude of the derivative of r(t):

||r'(t)|| = ||-e^(-t)sin(t)i + e^(-t)cos(t)j|| = e^(-t)

Therefore, the length of the curve c is:

s = ∫c ds = ∫0^(π/2) e^(-t) dt = 1 - e^(-π/2)

Now, we can evaluate the line integral:

∫c(x^2 + y^2)ds = ∫0^(π/2) (e^(-2t)cos^2(t) + e^(-2t)sin^2(t))e^(-t) dt

= ∫0^(π/2) e^(-3t) dt

= [-1/3 e^(-3t)]_0^(π/2)

= 1/3 (1 - e^(-3π/2))

Therefore, the value of the line integral over the curve c is 1/3 (1 - e^(-3π/2)).

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The best description of the species present in the solution after 100 mL of 0.1 M NaOH has been added is:

(c): HNO₂(aq) is the predominant species; much smaller amounts of H+(aq) and NO₂−(aq) exist.

The reaction between nitrous acid and sodium hydroxide can be written as follows:

HNO₂(aq) + NaOH(aq) → NaNO₂(aq) + H₂O(l)

This is a neutralization reaction, where the acid and base react to form a salt and water. In this case, nitrous acid is the acid and sodium hydroxide is the base.

Since the initial concentration of nitrous acid is 0.1 M and an equal volume of 0.1 M NaOH is added, the final concentration of nitrous acid will be reduced by half, to 0.05 M.

To determine the species present in the solution after the reaction, we need to consider the acid-base equilibrium of nitrous acid:

HNO₂(aq) + H₂O(l) ⇌ H₃O+(aq) + NO₂−(aq)

The equilibrium constant for this reaction is the acid dissociation constant, Ka, which is given as 4.5 x 10−4.

At equilibrium, the concentrations of the species will depend on the value of Ka and the initial concentration of nitrous acid. We can use the quadratic equation to solve for the concentrations of H₃O+, NO₂−, and HNO₂:

Ka = [H₃O+][NO₂−]/[HNO₂]

Substituting the values, we get:

4.5 x 10−4 = [x][x]/[0.05−x]

Solving for x gives us:

[H₃O+] = [H+] = 0.015 M
[NO₂−] = 0.015 M
[HNO₂] = 0.035 M

Therefore, the best description of the species present in the solution after 100 mL of 0.1 M NaOH has been added is option (c): HNO₂(aq) is the predominant species; much smaller amounts of H+(aq) and NO₂−(aq) exist.

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a) The relation XRy is an equivalence relation.

b) The relation XRy is not an equivalence relation.

(a) Let's first check if the relation XRy is reflexive. For any integer x, we have x - x = 3(0), which means xRx. So the relation is reflexive.

Next, we check if it's symmetric. If x - y = 3m, then y - x = -3m, which is also of the form 3n (where n = -m). So the relation is symmetric.

Finally, we check if it's transitive. If x - y = 3m and y - z = 3n, then x - z = (x - y) + (y - z) = 3m + 3n = 3(m + n). So the relation is transitive.

(b) Again, let's check if XRy is reflexive. For any integer x, we have x + x = 3(2x/3), which means xRx. So the relation is reflexive.

Next, we check if it's symmetric. If x + y = 3m, then y + x = 3m, so the relation is symmetric.

Finally, we check if it's transitive. If x + y = 3m and y + z = 3n, then x + z = (x + y) + (y + z) - 2y = 3(m + n) - 2y. This expression is not necessarily of the form 3p for some integer p, so the relation is not transitive.

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(a) XRy if x - y = 3m for some integer m:

This relation is not an equivalence relation. To be an equivalence relation, it must satisfy the following three conditions: reflexivity, symmetry, and transitivity.

Reflexivity: For any integer x, x + x = 2x, which is a multiple of 3 when x is a multiple of 3. Therefore, xRx for all integers x.

Symmetry: If xRy, then x + y = 3m for some integer m. This implies that y + x = 3m, which is also a multiple of 3. Hence, yRx.

Transitivity: If xRy and yRz, then x + y = 3m and y + z = 3n for some integers m and n. Adding these two equations gives x + y + y + z = 3(m + n), which simplifies to x + z + 2y = 3(m + n). Since 2y is a multiple of 3, x + z must also be a multiple of 3. Therefore, xRz.

Since this relation satisfies all three properties of an equivalence relation, it is indeed an equivalence relation.

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The maximum number of pounds of cotton candy grapes Michaela can buy without spending more than $20 is 4 pounds. The options that solve the problem are 3, 4 and 5

Michaela's favorite fruit is cotton candy grape. She has a budget of $20 to spend on a gallon of cider that costs $3.50 and the rest on cotton candy grapes. The cotton candy grapes cost $3.75 per pound.

We have to determine how many pounds of grapes Michaela can buy without spending more than $20.

To solve the problem, we will follow the steps given below:

Let's assume that Michaela spends $x on cotton candy grapes. Since she has $20 to spend,

she can spend $(20 - 3.5) = $16.5 on cotton candy grapes.

We can form an equation for the amount spent on grapes as:

3.75x ≤ 16.5

If we divide both sides of the inequality by 3.75, we will get:

x ≤ 16.5/3.75≈ 4.4

Therefore, the maximum number of pounds of cotton candy grapes Michaela can buy without spending more than $20 is 4 pounds.

Therefore, the options that solve the problem are 3, 4 and 5 (since she can't buy more than 4 pounds).

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To prove that the pole of the Simson line must be one of the vertices of the triangle, we will use the following theorem:

Theorem: If the pole of the Simson line lies on the circumcircle of the triangle, then it must be one of the vertices of the triangle.

Proof: Let ABC be a triangle with circumcircle O. Let P be the pole of the Simson line with respect to triangle ABC. We need to show that P must be one of the vertices, say A, of the triangle.

Since P is the pole of the Simson line, it lies on the perpendicular bisectors of the sides of the triangle. Therefore, PA = PB = PC.

Consider the circumcircle of triangle ABC. Since PA = PB = PC, point P lies on the circumcircle of the triangle.

Now, by the Inscribed Angle Theorem, the angle subtended by an arc at the center of the circle is twice the angle subtended by the same arc at any point on the circumference.

Since P lies on the circumcircle, angle APB subtends the same arc as angle ACB at the center of the circle. Thus, angle APB = 2 * angle ACB.

Similarly, angle APC = 2 * angle ABC.

But angle APB + angle APC + angle BPC = 180 degrees (by the angles around a point add up to 360 degrees).

Substituting the above angles, we have 2 * angle ACB + 2 * angle ABC + angle BPC = 180 degrees.

Simplifying, we get angle ACB + angle ABC + angle BPC = 90 degrees.

Since angles ACB and ABC are acute angles, angle BPC must be a right angle. Therefore, P lies on the perpendicular from B to AC.

Similarly, P also lies on the perpendicular from C to AB.

Since P lies on both perpendiculars, it must be the orthocenter of triangle ABC.

Since the orthocenter is the intersection of the altitudes of the triangle, which are concurrent at one of the vertices, P must be one of the vertices of the triangle.

Therefore, the pole of the Simson line must be one of the vertices of the triangle.

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The line integral simplifies to: ∫(c) xyeyz dy = 18t^6e^(3t^3)

To evaluate the line integral, we need to compute the following expression:

∫(c) xyeyz dy

where c is the curve parameterized by x = 3t, y = 2t^2, z = 3t^3, and t ranges from 0 to 1.

First, we express y and z in terms of t:

y = 2t^2

z = 3t^3

Next, we substitute these expressions into the integrand:

xyeyz = (3t)(2t^2)(e^(3t^3))(3t^3)

Simplifying this expression, we have:

xyeyz = 18t^6e^(3t^3)

Now, we can compute the line integral:

∫(c) xyeyz dy = ∫[0,1] 18t^6e^(3t^3) dy

To solve this integral, we integrate with respect to y, keeping t as a constant:

∫[0,1] 18t^6e^(3t^3) dy = 18t^6e^(3t^3) ∫[0,1] dy

Since the limits of integration are from 0 to 1, the integral of dy simply evaluates to 1:

∫[0,1] dy = 1

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The symmetric property states that if A equals B, then B must also equal A. Euclid's common notions 1 and 4 can be used to prove this property.

First, if A equals B, then they are both equal to the same thing. This satisfies the first common notion.

Next, if we add equals to equals (A plus C equals B plus C), then the wholes are equal according to the fourth common notion. Therefore, we can conclude that B plus C equals A plus C.

Similarly, if equals are subtracted from equals (A minus C equals B minus C), then the remainders are equal. This implies that B minus C equals A minus C.

Finally, if A coincides with B, they are in the same location and are thus equal according to the fourth common notion.

Taken together, these common notions demonstrate that if A equals B, then B must also equal A, proving the symmetric property.

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Answer: 2/5

Step-by-step explanation:

there's 5 parts and 2 of them are even therefore 2 out of 5 chances are them being even

Answer: 1/10

Step-by-step explanation:

The probability of spinning any one number on the spinner is 1/5, and the probability of flipping heads or tails on the coin is 1/2. To find the probability of spinning a number AND flipping heads, you would multiply the probabilities: (1/5) x (1/2)=1/10. So the probability of the compound even is 1/10.

Hope this helps

(a) To compute the eigenvalues and eigenvectors of A, we solve the characteristic equation:

det(A - λI) = 0

where I is the identity matrix and λ is the eigenvalue. Substituting the given matrix A and simplifying, we have:

|1-λ 1 4|

|2 3-λ 2|

|3 4 2-λ| = 0

Expanding along the first row, we get:

(1-λ)[(3-λ)(2-λ) - 4(4)] - (1)[(2)(2-λ) - 4(4)] + (4)[(2)(4) - (3)(3)] = 0

Simplifying and rearranging, we obtain:

λ^3 - 6λ^2 - 5λ + 60 = 0

We can factor this polynomial as (λ-5)(λ-4)(λ+3) = 0, so the eigenvalues of A are λ₁ = 5, λ₂ = 4, and λ₃ = -3.

To find the eigenvectors corresponding to each eigenvalue, we substitute back into the equation (A - λI)x = 0 and solve for x.

For λ₁ = 5, we have:

|1-5 1 4|   |-4 1 4|

|2 3-5 2| x =| 2-2|

|3 4 2-5|   | 3 4-3|

Reducing this to row echelon form, we get:

|1 0 -4/5|   | 4/5|

|0 1 -2/5| x =|-1/5|

|0 0 0   |   |  0 |

So the eigenvector corresponding to λ₁ is x₁ = (4/5, -1/5, 1).

Similarly, for λ₂ = 4, we have:

|-3 1 4|   | 1|

| 2 -1 2| x =|-1|

| 3 4 -2|   | 0|

Reducing to row echelon form, we get:

|1 0 -2|   |2/3|

|0 1 -2| x =|-1/3|

|0 0 0 |   |  0 |

So the eigenvector corresponding to λ₂ is x₂ = (2/3, 1/3, 1).

Finally, for λ₃ = -3, we have:

|4 1 4|   |-1|

|2 6 2| x =| 0|

|3 4 5|   |-1|

Reducing to row echelon form, we get:

|1 0 -2/5|   | 1/5|

|0 1 1/5 | x =|-1/5|

|0 0 0   |   |  0 |

So the eigenvector corresponding to λ₃ is x₃ = (2/5, -1/5, 1).

Next, we compute the eigenvalues and eigenvectors of I + A. Since I is the identity matrix, the characteristic equation is:

det(I + A - λI) = det(A + (I - I) - λI) = det(A + (1-λ)I) = 0

Substituting the given matrix A and simplifying, we have:

|2-λ 1 4|

|2 4-λ

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To find the change of coordinates matrices P and Q, we need to express the basis vectors of each basis in terms of the other two bases and use these to construct the corresponding change of coordinates matrices.

First, let's express the basis vectors of each basis in terms of the other two bases:

E basis:

1 = 1(1) + 0(t) + 0(t^2) + 0(t^3)

t = 0(1) + 1(t) + 0(t^2) + 0(t^3)

t^2 = 0(1) + 0(t) + 1(t^2) + 0(t^3)

t^3 = 0(1) + 0(t) + 0(t^2) + 1(t^3)

B basis:

1 = 0(1) + 1(1+2t) + 2(2-t+3t^2) + 0(4-t+t^3)

t = 0(1) + 2(1+2t) - 1(2-t+3t^2) + 0(4-t+t^3)

t^2 = 0(1) - 3(1+2t) + 4(2-t+3t^2) + 0(4-t+t^3)

t^3 = 1(1) - 4(1+2t) + 1(2-t+3t^2) + 1(4-t+t^3)

C basis:

1+3t+t^2 = 1(1+2t) - 1(2-t+3t^2) + 0(4-t+t^3)

2+t = 1(1) + 0(t) + 0(t^2) + 1(t^3)

3t-2+4t^3 = 0(1+2t) + 3(2-t+3t^2) + 0(4-t+t^3)

3t = 0(1) + 0(t) + 1(t^2) + 0(t^3)

Now we can construct the change of coordinates matrices P and Q:

P matrix:

The columns of P are the coordinate vectors of the basis vectors of E with respect to B.

First column: [1, 0, 0, 0] (since 1 = 0(1) + 1(1+2t) + 2(2-t+3t^2) + 0(4-t+t^3))

Second column: [1, 2, -3, -4] (since t = 0(1) + 2(1+2t) - 1(2-t+3t^2) + 0(4-t+t^3))

Third column: [0, -1, 4, -1] (since t^2 = 0(1) - 3(1+2t) + 4(2-t+3t^2) + 0(4-t+t^3))

Fourth column: [0, 0, 0, 1] (since t^3 = 1(1) - 4(1+2t) + 1(2-t+3t^2) + 1(4-t+t^3)

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The value of expression is -56/67.

We can use the tangent addition formula to find tan(a + b) using the given values of tan(a) and tan(b). The formula is:

tan(a + b) = (tan(a) + tan(b)) / (1 - tan(a) * tan(b))

Plugging in the values, we get:

tan(a + b) = (8/5 + 7) / (1 - (8/5) * 7)

= (56/5) / (-27/5)

= -56/27

Therefore, tan(a b) = tan(a + b) / (1 - tan(a) * tan(b)) = (-56/27) / (1 - (8/5) * 7) = -56/67. So the answer is -56/67.

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a) The limit of the exponential term is also 0 hence, f'(0) = 0. b) All the derivatives of f(x) at x = 0 are zero. c) The Maclaurin series for f(x) is a constant term f(0), and it does not converge to f(x) for x ≠ 0.

a. To find f'(x), we need to differentiate f(x) with respect to x. For x ≠ 0, we have:

f'(x) = d/dx [tex]e^{-1/x^{2} }[/tex]

= (-2/[tex]x^{3}[/tex]) * [tex]e^{-1/x^{2} }[/tex]

Now, let's evaluate f'(0):

f'(0) = lim(x→0) [(-2/[tex]x^{3}[/tex]) * [tex]e^{-1/x^{2} }[/tex] ]

= lim(x→0) [-2/[tex]x^{3}[/tex]] * lim(x→0) [tex]e^{-1/x^{2} }[/tex]

Since the first limit is well-defined and equal to 0, we focus on the second limit:

lim(x→0)[tex]e^{-1/x^{2} }[/tex]

As x approaches 0, the term 1/[tex]x^{2}[/tex] approaches infinity. The exponential term [tex]e^{-1/x^{2} }[/tex]  tends to 0 as the exponent approaches negative infinity. Therefore, the limit of the exponential term is also 0.

Hence, f'(0) = 0.

b. Since f'(0) = 0 and we assume that [tex]f^{n}[/tex](0) = 0 for n = 1, 2, 3, and so on, we can conclude that all the derivatives of f(x) at x = 0 are zero.

c. The Maclaurin series for f(x) can be derived using the fact that all derivatives of f(x) at x = 0 are zero. The Maclaurin series is given by:

f(x) = f(0) + f'(0)x + (f''(0)/2!)[tex]x^{2}[/tex] + (f'''(0)/3!)[tex]x^{3}[/tex] + ...

Since f'(0) = 0 and all higher-order derivatives at x = 0 are also zero, we have:

f(x) = f(0)

Therefore, the Maclaurin series for f(x) is simply the constant term f(0). The series does not involve any powers of x or higher-order terms.

For x ≠ 0, the Maclaurin series does not converge to f(x) since it is just a constant value, f(0). The series fails to capture the behavior of f(x) away from x = 0, where f(x) is defined as [tex]e^{-1/x^{2} }[/tex] .

In summary, the Maclaurin series for f(x) is a constant term f(0), and it does not converge to f(x) for x ≠ 0 because it does not capture the exponential behavior of f(x) away from x = 0.

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Answer:

1225

Step-by-step explanation

The sum of positive integers less than 50 can be found using the formula for the sum of an arithmetic sequence. An arithmetic sequence is a sequence of numbers in which each term is obtained by adding a fixed value (called the common difference) to the previous term.

In this case, the first term is 1, the common difference is 1, and we want to find the sum of the first 49 terms (since we are looking for the sum of positive integers less than 50).

The formula for the sum of an arithmetic sequence is:

S = n/2 * (a + l)

where S is the sum, n is the number of terms, a is the first term, and l is the last term.

We can find the last term by subtracting the common difference (1) from 50, since we want the last term to be less than 50. So:

l = 50 - 1 = 49

Using these values, we can plug into the formula:

S = 49/2 * (1 + 49)

= 24.5 * 50

= 1225

Therefore, the sum of positive integers less than 50 is 1+2+3+...+48+49 = 1225.

The measure of the arc of the circular basin of the fountain that will be in the photograph is; 111°

Now, To answer this question, we need to understand the angle of intersecting secant theorem which state that;

If two lines intersect outside a circle, then the measure of the angle formed by the two lines is half of the positive difference of the measures of the intercepted arcs.

Thus;

θ = 1/2 (x₂ - x₁)

Where:

x₂ is large angle

x₁ is small angle

θ is measure of the Angle formed by the two lines

Now, we are given θ = 69°

Now the measure of the arc of the circular basin will be the smaller angle x₁.

However, the sum of the large and small angle is 360° and so large angle is 360 - x₁.

Thus;

69 = 1/2(360 - x - x)

2 × 69 = 360 - 2x

138 = 360 - 2x

360 - 138 = 2x

2x = 222

x = 222/2

x = 111°

Thus, The measure of the arc of the circular basin of the fountain that will be in the photograph is; 111°

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To evaluate the line integral, we need to parametrize the given curve C and then substitute the parametric equations into the integrand. We can parameterize C using two line segments as follows:

For the first line segment from (0, 0) to (4, 0), we can let x = t and y = 0, where 0 ≤ t ≤ 4.

For the second line segment from (4, 0) to (5, 2), we can let x = 4 + t/√5 and y = 2t/√5, where 0 ≤ t ≤ √5.

Then the line integral becomes:

∫C xy dx +(x - y)dy = ∫0^4 t(0) dt + ∫0^√5 [(4 + t/√5)(2t/√5) dt + (4 + t/√5 - 2t/√5)(2/√5) dt]

Simplifying the integrand, we get:

∫C xy dx +(x - y)dy = ∫0^4 0 dt + ∫0^√5 [(8/5)t^2/5 + (8/5)t - (2/5)t^2/5 + (8/5)] dt

Evaluating the definite integral, we get:

∫C xy dx +(x - y)dy = [(8/25)t^5/5 + (4/5)t^2/2 + (8/5)t]0^√5 + [(2/25)t^5/5 + (4/5)t^2/2 + (8/5)t]0^√5

Simplifying, we get:

∫C xy dx +(x - y)dy = (16/5)(√5 - 1)

Therefore, the value of the line integral is (16/5)(√5 - 1).

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The mean attention span for adults in a certain village is μ = 15 minutes with a standard deviation of σ = 6.4. We are interested in finding the mean of all possible samples of size n = 30, taken from that population.

According to the central limit theorem, the distribution of sample means will be approximately normal with a mean equal to the population mean and a standard deviation equal to the population standard deviation divided by the square root of the sample size. That is:

[tex]mean of sample means = population mean = μ = 15 minutes\\standard deviation of sample means = population standard deviation / sqrt(n) = σ / sqrt(30) ≈ 1.17 minutes[/tex]

Therefore, the mean of all possible samples of size 30, taken from the population with mean 15 minutes and standard deviation 6.4 minutes, is approximately equal to 15 minutes.

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The general solution of the given system of differential equations is x(t) = c₁e^(3t) + c₂e^(2t), y(t) = c₁e^(3t) + c₂te^(2t), where c₁ and c₂ are arbitrary constants.

To find the general solution, we first need to find the eigenvalues of the coefficient matrix. The characteristic polynomial of the coefficient matrix is obtained by setting the determinant of the matrix minus λ times the identity matrix equal to zero, where λ is the eigenvalue. In this case, the characteristic polynomial is 12 - 14λ + 65.

To find the eigenvalues, we solve the characteristic polynomial equation 12 - 14λ + 65 = 0. Solving this quadratic equation, we find two eigenvalues: λ₁ = 3 and λ₂ = 2.

Next, we find the corresponding eigenvectors associated with each eigenvalue. Substituting λ₁ = 3 into the matrix equation (A - λ₁I)v₁ = 0, we find the eigenvector v₁ = [1, 1]. Similarly, substituting λ₂ = 2, we find the eigenvector v₂ = [1, 2].

Finally, using the eigenvalues and eigenvectors, we can write the general solution of the system of differential equations as x(t) = c₁e^(3t) + c₂e^(2t) and y(t) = c₁e^(3t) + c₂te^(2t), where c₁ and c₂ are arbitrary constants. This solution represents all possible solutions to the given system of differential equations

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The volume of the given figure is 64 in³. Thus option 1. is the correct answer.

The figure given in the question is a cube, with one side equal to 4 in.

Note that all side of a cube are equal, therefore each side of the cube i.e. length, breadth and height are equal to 4 in.

∴The formula for calculating volume of cube is given by:

V = a³ ...........(i)

where,

V = Volume of cube, and

a = side of cube

Given that a = 4 in,

∴ V = (4 in)³

⇒ V = 64 in³

Thus, The volume of the given figure is 64 in³. Thus option 1. is the correct answer.

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The volume of the cube is 64 in³.

Option A is the correct answer.

We have,

The given figure is a cube.

So we will use the volume of a cube.

Now,

The side of the cube is 4 in.

Now,

The volume of the cube.

= side³

Now,

Substitute side = 4 in

So,

The volume of the cube.

= side³

= 4³

= 64 in³

Thus,

The volume of the cube is 64 in³.

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The value of the house after 10 years will be approximately $265,134.1. The continuous rate of appreciation of a house can be calculated using the formula A = [tex]Pe^{(rt)[/tex].

The continuous rate of appreciation of a house can be calculated using the formula A = Pe^(rt), where A is the final value of the house, P is the initial value, e is the mathematical constant e ≈ 2.71828, r is the continuous rate, and t is the time in years. Therefore, if the initial value of the house is $215,000 and it appreciates continuously at a rate of 2.1%, the value of the house after 10 years can be calculated as follows:  A = [tex]Pe^{(rt)[/tex]
A = $215,000[tex]e^{(0.021 * 10)[/tex]
A = $215,000[tex]e^{(0.21)[/tex]
A = $215,000 × 1.23274
A = $265,134.1

Thus, the value of the house after 10 years will be approximately $265,134.1.

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Answer:

Easy, speech frees sneeze

The temperature (in degrees Fahrenheit) at the top of the mountain Everest, given that temperature will drop 1 degree for every 500 feet is -61 °F

First, we shall obtain the number of increment at every 500 feet. This is shown below:

Number of increment = Height of mountain / Height per drop

Number of increment = 29000 / 500

Number of increment =  58

Next, we shall obtain the temperature drop in the process. Details below:

Temperature drop = Temperature drop per increment × number of increment

Temperature drop = 1 × 58

Temperature drop = 58 °F

Finally, we shall obtain the temperature at the top of the mountain. Details below:

Temperature at top = Initial temperature - Temperature drop

Temperature at top = -3 - 58

Temperature at top = -61 °F

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Answer:

We can use long division to divide (x3 − 5x2 − 16x + 20) by (x − 4) as follows:

x^2 + 3x - 4

_________________________

x - 4 | x^3 - 5x^2 - 16x + 20

- (x^3 - 4x^2)

________________

- x^2 - 16x

+ (x^2 - 4x)

________________

- 12x + 20

+ (-12x + 48)

________________

68

Therefore, (x3 − 5x2 − 16x + 20) ÷ (x − 4) = x^2 + 3x - 4 with a remainder of 68.

The cross product assuming that u×v=⟨7,6,0⟩.(u−7v)×(u+7v) is                ⟨-49, -7u_2 + 6u_3, -7u_3 + 6u_2⟩.

The cross product of two vectors using the distributive property:

(u - 7v) × (u + 7v) = u × u + u × 7v - 7v × u - 7v × 7v

Also, cross product is anti-commutative. Specifically, the cross product of v × w is equal to the negative of the cross product of w × v. So, we can simplify the expression as follows:

(u - 7v) × (u + 7v) = u × 7v - 7v × u - 7(u × 7v)

Now, using u × v = ⟨7, 6, 0⟩ to evaluate the cross products:

u × 7v = 7(u × v) = 7⟨7, 6, 0⟩ = ⟨49, 42, 0⟩

7v × u = -u × 7v = -⟨7, 6, 0⟩ = ⟨-7, -6, 0⟩

Substituting these values into the expression:

(u - 7v) × (u + 7v) = ⟨0, 7u_2 - 6u_3, 7u_3 - 6u_2⟩ - 7⟨7, 6, 0⟩ - 7⟨-7, -6, 0⟩

= ⟨0, 7u_2 - 6u_3, 7u_3 - 6u_2⟩ - ⟨49, 42, 0⟩ + ⟨49, 42, 0⟩

= ⟨-49, -7u_2 + 6u_3, -7u_3 + 6u_2⟩

Therefore, (u - 7v) × (u + 7v) = ⟨-49, -7u_2 + 6u_3, -7u_3 + 6u_2⟩.

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