(a) The critical values of the function are t = 0 and t = 12.
(b) In this particular problem, the critical value t = 12 makes sense.
(a) To find the critical values of the function, we need to determine the values of t where the derivative of the function is equal to zero or does not exist. Taking the derivative of the given function, we have y' = 140 + t + 0.5t².
Setting y' equal to zero, we can solve for t:
140 + t + 0.5t² = 0
Simplifying the equation and factoring, we get:
0.5t² + t + 140 = 0
Using the quadratic formula, we find the solutions for t:
t = (-1 ± √(1 - 4 * 0.5 * 140)) / (2 * 0.5)
After solving the equation, we obtain two solutions: t = 0 and t = 12. These are the critical values of the function.
(b) In this specific problem, the critical value t = 12 makes sense because it falls within the given context of the analysis. The function represents the number of units produced per hour after t hours of production. Therefore, it is logical to consider the critical value t = 12, which indicates the maximum or minimum point in the production process.
(c) To determine the values of t for which y is increasing, we need to examine the sign of the derivative. Since y' = 140 + t + 0.5t², we can observe that the derivative is positive for all values of t. Thus, the function y is increasing for the interval 0 ≤ t ≤ 12.
(d) To graph the function, we can plot the points on a coordinate plane. The y-axis represents the number of units produced per hour (y), and the x-axis represents the hours of production (t). By plotting the points using the equation y = 140t + 0.5t², we can visualize the shape of the function and observe any trends or patterns.
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Find the lower and upper χ ^2
critical values corresponding to a(n)90% confidence interval about a population standard deviation with a sample size of 16 . Round to 3 decimal places. Lower: Upper:
The lower critical value is 7.260 and the upper critical value is 26.119.
In a 90 percent confidence interval, the lower and upper critical χ² values corresponding to a population standard deviation with a sample size of 16 can be found as follows:
Lower critical value: χ² (n - 1, α / 2)
Upper critical value: χ² (n - 1, 1 - α / 2)
Here, n is the sample size.α is the level of significance.
The degree of freedom is n - 1.
Lower critical value = χ² (15, 0.05)
Upper critical value = χ² (15, 0.95)
Using a χ² distribution table, we get the following values:
Lower critical value = 7.260
Upper critical value = 26.119
Rounded to 3 decimal places, the lower critical value is 7.260 and the upper critical value is 26.119.
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Let u(t) = 4t³i + (t² − 6) j − 8k. Compute the derivative of the following function. u (t4 - 2t) Select the correct choice below and fill in the answer box(es) to complete your choice. A. The derivative is the vector-valued function B. The derivative is the scalar function i+ j+ k. Let u(t) = 2t³i + (t² − 1)j-8k. Compute the derivative of the following function. (+¹1+9t) u(t) Select the correct choice below and fill in the answer box(es) to complete your choice. A. The derivative is the vector-valued function B. The derivative is the scalar function )i + ()j + (k.
Let u(t) = 4t³i + (t² − 6) j − 8k. Compute the derivative of the following function. u (t4 - 2t)For the given question, u(t) = 4t³i + (t² − 6) j − 8k. The derivative of the given function is the vector-valued function (20t³+9)i + 2tj + (t²-1)j - 8k.
Let's compute the derivative of the function u(t4 - 2t).
Therefore, the derivative of u(t4 - 2t) is calculated as follows; u'(t) = 4(4t³-2)+ (2t-6)j - 0k= 16t³+2tj
Let u(t) = 2t³i + (t² − 1)j-8k. Compute the derivative of the following function. (+¹1+9t) u(t)
For the given question, u(t) = 2t³i + (t² − 1)j-8k.
Let's compute the derivative of the function u(t4 - 2t).
Therefore, the derivative of the function (+¹1+9t) u(t) is calculated as follows:
u'(t) = (+¹1+9t) [2t³i + (t² − 1)j-8k]' + (2t³i + (t² − 1)j-8k) [(+¹1+9t)']u'(t) = (+¹1+9t) [6t²i + 2tj] + (2t³i + (t² − 1)j-8k) (9)i= (20t³+9)i + 2tj + (t²-1)j - 8k
Therefore, the derivative of the given function is the vector-valued function (20t³+9)i + 2tj + (t²-1)j - 8k.
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Mike bought a bag of blue and white marbles. The bag contained 45 marbles, and 60% of them were blue. How many blue marbles did Mike buy?
Skinner's Fish Market buys fresh Boston bluefish daily for $4.20 per pound and sells it for $6 per pound. At the end of each business day, any remaining bluefish is sold to a producer of cat food for $3 per pound. Daily demand can be approximated by a normal distribution with a mean of 108 pounds and a standard deviation of 9 pounds. What is the optimal order quantity (stocking level)? Round your answer to 2 decimal places. Answer:
The optimal order quantity (stocking level) for Skinner's Fish Market is approximately 14.70 pounds, calculated using the economic order quantity (EOQ) formula. This quantity minimizes the total cost by balancing the ordering cost and holding cost per unit per period.
To determine the optimal order quantity (stocking level), we can use the economic order quantity (EOQ) formula. The EOQ formula is given by:
EOQ = √((2DS)/H)
Where:
D = Demand per period (in this case, the mean daily demand of 108 pounds)
S = Ordering cost per order (the cost of buying fresh bluefish at $4.20 per pound)
H = Holding cost per unit per period (the opportunity cost of holding the bluefish in inventory)
Since the problem doesn't provide explicit values for S and H, we'll assume that the ordering cost and holding cost per unit per period are equal. Let's denote this common cost as C.
Plugging in the values into the EOQ formula, we have:
EOQ = √((2DC)/C)
= √(2D)
Substituting the mean daily demand D = 108 pounds, we get:
EOQ = √(2 * 108)
= √(216)
≈ 14.70
Rounded to two decimal places, the optimal order quantity (stocking level) is approximately 14.70 pounds.
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In February John had $1,000 in his account. In June he has 2,600 what is the rate of change in other words by an average how much per month is John account changing
Answer:
Step-by-step explanation:
His account is changing by 400 dollars a month. Because if you subtract 2600 from 1000 you'll get 1600 then divide by the amount of time in this case 4 months and you'll get that it is changing by 400 dollars each month.
Use the limit definition of a derivative to find the derivative of f(x)=x/x+2
Using the limit definition of a derivative we obtain the derivative of f(x)=x/(x+2) as: f'(x) = x + 2 + (x - 2)/(x + 2)
To obtain the derivative of the function f(x) = x/(x + 2) using the limit definition of a derivative, we need to evaluate the following limit:
lim (h -> 0) [(f(x + h) - f(x))/h]
Let's start by substituting the function into the limit expression:
lim (h -> 0) [(f(x + h) - f(x))/h]
= lim (h -> 0) [((x + h)/(x + h + 2) - x/(x + 2))/h]
Now, we need to simplify the expression inside the limit:
= lim (h -> 0) [(x + h)/(h(x + h + 2)) - x/(h(x + 2))]
= lim (h -> 0) [(x + h)(x + 2) - x(h + 2)] / [h(x + h + 2)(x + 2)]
Expanding the numerator:
= lim (h -> 0) [x^2 + 2x + hx + 2h - xh - 2x] / [h(x + h + 2)(x + 2)]
= lim (h -> 0) [x^2 + hx + 2h - 2x] / [h(x + h + 2)(x + 2)]
Now, let's cancel out common factors and simplify the expression:
= lim (h -> 0) [(x^2 + hx - 2x + 2h) / (h(x + h + 2)(x + 2))]
= lim (h -> 0) [(x(x + 2) + h(x - 2)) / (h(x + h + 2)(x + 2))]
= lim (h -> 0) [(x + 2) + (x - 2)(h / (h(x + h + 2)(x + 2)))]
Canceling out the common factors again:
= lim (h -> 0) [(x + 2) + (x - 2)/(x + h + 2)(x + 2)]
Now, we can substitute h = 0 into the expression since it is the limit as h approaches 0:
= (x + 2) + (x - 2)/(x + 2)
= x + 2 + (x - 2)/(x + 2)
Therefore, the derivative of f(x) = x/(x + 2) is:
f'(x) = x + 2 + (x - 2)/(x + 2)
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The following proof fits the logical definition. Analyze it to find out what is really going on. Rewrite it in sensible style to reveal the structure of the argument.
If A, B, c are sets then (A ∩B)∩ C = A ∩(B∩C).
Proof:
L1: Let a ∈ (A ∩B)∩ C.
L2. a ∈ A ∩B
L3: Let b ∈ A ∩(B∩C).
L4: a ∈ C
L5: b∈ B∩C
L6: b ∈ B
L7: a ∈ B
L8: b ∈ C
L9: a, b ⊆ B
L10: b ∈ A
L11: a ∈ A
L12: b ∈ A ∩B
L13: a ∈ A ∩B
L14: {a, b) ⊆ A ∩B
L15: a∈ B∩C
L16: a ∈ A ∩(B∩C).
L17. (A ∩B) ∩ C ⊆ A ∩(B∩C)
L18: b ∈ (A ∩B) ∩ C
L19: (A ∩B) ∩ C ⊇ A ∩(B∩C)
L20: (A ∩B)∩ C = A ∩(B∩C).
The sets (A ∩B) and C are equal to the set A and the set (B∩C). The sets (A ∩B) and C are equal to the set A and the set (B∩C)
The following proof of the equation (A ∩B)∩ C = A ∩(B∩C) fits the logical definition. To analyze what is going on in this proof, we can break it down into steps and rewrite it in a sensible style that reveals the structure of the argument.
Here is the proof in a more readable format:
Proof:
Assume that A, B, and C are set.
L1: Let a be an element of (A ∩B)∩ C.
L2: Then a must be an element of both A and B, since it is in A ∩B.
L3: Let b be an element of A ∩(B∩C).
L4: Then a must be an element of C, since it is in both (A ∩B) and C.
L5: Then b must be an element of both B and C, since it is in B∩C.
L6: Therefore, b is an element of B.
L7: Therefore, a is an element of B.
L8: Therefore, b is an element of C.
L9: Therefore, both a and b are subsets of B.
L10: Then b must be an element of A, since it is in both B and A ∩(B∩C).
L11: Therefore, a is an element of A.
L12: Then b must be an element of A ∩B.
L13: Therefore, a is an element of A ∩B.
L14: Therefore, the set {a, b} is a subset of A ∩B.
L15: Then a must be an element of B∩C.
L16: Therefore, a is an element of A ∩(B∩C).
L17. Therefore, (A ∩B) ∩ C is a subset of A ∩(B∩C).
L18: Let b be an element of (A ∩B) ∩ C.
L19: Then b is an element of both A ∩B and C.
L20: Therefore, (A ∩B)∩ C is a superset of A ∩(B∩C).
L21: Therefore, (A ∩B)∩ C = A ∩(B∩C).
In this proof, the writer is showing that the sets (A ∩B) and C are equal to the set A and the set (B∩C). The writer assumes that A, B, and C are sets. Then they take an element a from the intersection of the sets (A ∩B) and C.
They use the same process for an element b from the intersection of A and (B∩C). The writer shows that b is in the intersection of (A ∩B) and C, and that the set (A ∩B) and C is a subset of A and (B∩C). Then they show that (A ∩B) and C is a supersets of A and (B∩C). Therefore, (A ∩B) and C is equal to A and (B∩C). The proof is complete.
This proof demonstrates the relationship between sets (A ∩B) and C and set A and set (B∩C). The writer uses elements a and b to demonstrate this relationship and shows that the sets are equal.
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Find ∬ S
xyz 2
dS where S is the portion of the cone z= 3
1
x 2
+y 2
that lies inside the sphere of radius 4 , centered at the origin. Set up, but do not evaluate.
The double integral of [tex]xyz^2[/tex] over the portion of the cone [tex]z = 3/(x^2 + y^2)[/tex] that lies inside the sphere of radius 4, centered at the origin, can be expressed as ∫∫[tex]R xyz^2 ρ^2sin(φ) dρdθ[/tex], where R represents the corresponding region in spherical coordinates.
To find the double integral of the function [tex]f(x, y, z) = xyz^2[/tex] over the portion of the cone inside the sphere, we need to set up the integral in spherical coordinates.
The cone is defined by the equation [tex]z = 3/(x^2 + y^2)[/tex], and the sphere has a radius of 4 centered at the origin.
In spherical coordinates, we have the following transformations:
x = ρsin(φ)cos(θ)
y = ρsin(φ)sin(θ)
z = ρcos(φ)
The sphere has a radius of 4, so ρ = 4.
To find the limits of integration, we need to determine the range for θ, ρ, and φ that correspond to the region of interest.
For θ, we can integrate over the entire 360° range: 0 ≤ θ ≤ 2π.
For ρ, since the sphere has a radius of 4, the limits are 0 ≤ ρ ≤ 4.
For φ, we need to consider the portion of the cone that lies inside the sphere. We can find the intersection curve of the cone and the sphere by setting the z-values equal to each other:
[tex]3/(x^2 + y^2) = ρcos(φ)\\3/(ρ^2sin^2(φ)) = ρcos(φ)\\3 = ρ^3cos(φ)sin^2(φ)[/tex]
Simplifying the equation, we get:
[tex]ρ^3 = 3/(cos(φ)sin^2(φ))[/tex]
Now, we can solve for φ. Taking the reciprocal of both sides:
[tex]1/ρ^3 = cos(φ)sin^2(φ)/3[/tex]
We can recognize that the right side is the derivative of [tex](-1/3)cos^3(φ)[/tex] with respect to φ. Integrating both sides, we have:
∫[tex](1/ρ^3) dρ[/tex]= ∫[tex](-1/3)cos^3(φ) dφ[/tex]
Integrating and simplifying:
[tex]-1/(2ρ^2) = (-1/3)(1/3)cos^4(φ) + C[/tex]
Rearranging the equation, we get:
[tex]ρ^2 = -3/(2(-1/3cos^4(φ) + C))[/tex]
Since [tex]ρ^2[/tex] represents a positive value, we can ignore the negative sign and simplify further:
[tex]ρ^2 = 3/(2cos^4(φ) - 6C)[/tex]
Thus, the limits for φ are given by:
0 ≤ φ ≤ φ_0, where [tex]cos^4(φ) = 3/(6C)[/tex]
Combining all the limits, the double integral in spherical coordinates becomes:
∬ [tex]S xyz^2 dS[/tex]= ∫∫[tex]R xyz^2 ρ^2sin(φ) dρdθ,[/tex]
where R represents the region defined by 0 ≤ θ ≤ 2π, 0 ≤ ρ ≤ 4, and 0 ≤ φ ≤ φ_0, with φ_0 determined by the equation [tex]cos^4(φ) = 3/(6C).[/tex]
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In the derivation of the formula for the volume of a cone, the volume of the cone is calculated to be StartFraction pi Over 4 EndFraction times the volume of the pyramid that it fits inside.
A cone is inside of a pyramid with a square base. The cone has a height of h and a radius r. The pyramid has a base edge length of 2 r.
Which statement best describes where the StartFraction pi Over 4 EndFraction comes from in the formula derivation?
A. It is the ratio of the area of the square to the area of the circle from a cross section.
B. It is the ratio of the area of the circle to the area of the square from a cross section.
C. It is the difference of the area of the square and the area of the circle from a cross section.
D. It is the sum of the area of the square and the area of the circle from a cross section.
The correct statement that describes where the fraction pi/4 comes from in the formula derivation is:
B. It is the ratio of the area of the circle to the area of the square from a cross section.
In the derivation of the formula for the volume of a cone, we consider a cross-section of the cone and the pyramid that it fits inside. The cross-section consists of a square base of the pyramid and the circle formed by the base of the cone. The fraction pi/4 represents the ratio of the area of the circle (base of the cone) to the area of the square (base of the pyramid) in that cross-section. This ratio is crucial in determining the volume relationship between the cone and the pyramid.
The right answer to the question regarding the origin of the fraction pi/4 in the formula derivation is B. It is the ratio of the cross-sectional area of the circle to the cross-sectional area of the square.
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Differentiate. a) y=(2x 2
−1) 3
(x 4
+3) 5
b) f(x)= 7−3x 2
6x+5
c) y=sin(x 3
)cos 3
x d) h(x)= e 3−4x
x 2
12. Evaluate each limit, if it exists. If it does not exist, explain why. a) lim x→0
x
16−x
−4
b) lim x→2
2x 2
−x−6
3x 2
−7x+2
13. Where is this function discontinuous? Justify your answer. f(x)= ⎩
⎨
⎧
−(x+2) 2
+1
x+1
(x−3) 2
−1
if x≤2
if −2
if x>3
14. Use first principles to determine the derivative of f(x)= x−3
2x
.
Differentiate
(a) dy/dx = 3(2x² - 1)² × 4x / (x⁴ + 3)⁵ - 5(2x² - 1)³ × 4x³ / (x⁴ + 3)⁵
(b) f'(x) = (-6x)(6x + 5) - (7 - 3x²)(6) / (6x + 5)²
(c) dy/dx = 3x² × cos(x³) × cos³(x) + sin(x³) × (-3sin(x))
(d) h'(x) = (-4e³⁻⁴ˣ)(x²) - (e³⁻⁴ˣ)(2x) / (x²)²
a) To differentiate y = (2x² - 1)³ / (x⁴ + 3)⁵, we can use the chain rule.
Let u = 2x² - 1 and v = x⁴ + 3.
Using the chain rule, we have:
dy/dx = dy/du × du/dx / v⁵ - 5(u³) × dv/dx
dy/du = 3(2x² - 1)² × 4x
du/dx = 4x
dv/dx = 4x³
Substituting these values back into the chain rule formula, we have:
dy/dx = 3(2x² - 1)² × 4x / (x⁴ + 3)⁵ - 5(2x² - 1)³ × 4x³ / (x⁴ + 3)⁵
Simplifying the expression gives the final result of dy/dx.
b) To differentiate f(x) = (7 - 3x²) / (6x + 5), we can use the quotient rule.
The quotient rule states that if f(x) = u(x) / v(x), then the derivative is given by:
f'(x) = (u'(x)v(x) - u(x)v'(x)) / (v(x))²
In this case, u(x) = 7 - 3x² and v(x) = 6x + 5.
Differentiating u(x) and v(x) gives:
u'(x) = -6x
v'(x) = 6
Substituting these values into the quotient rule formula, we have:
f'(x) = (-6x)(6x + 5) - (7 - 3x²)(6) / (6x + 5)²
Simplifying the expression gives the derivative f'(x).
c) To differentiate y = sin(x³) × cos³(x), we can use the product rule.
Let u(x) = sin(x³) and v(x) = cos³(x).
Using the product rule, the derivative is given by:
dy/dx = u'(x)v(x) + u(x)v'(x)
Differentiating u(x) and v(x) gives:
u'(x) = 3x² × cos(x³)
v'(x) = -3sin(x)
Substituting these values into the product rule formula, we have:
dy/dx = 3x² × cos(x³) × cos³(x) + sin(x³) × (-3sin(x))
Simplifying the expression gives the derivative dy/dx.
d) To differentiate h(x) = e³⁻⁴ˣ / x², we can use the quotient rule.
The quotient rule states that if f(x) = u(x) / v(x), then the derivative is given by:
f'(x) = (u'(x)v(x) - u(x)v'(x)) / (v(x))²
In this case, u(x) = e³⁻⁴ˣ and v(x) = x²
Differentiating u(x) and v(x) gives:
u'(x) = -4e³⁻⁴ˣ
v'(x) = 2x
Substituting these values into the quotient rule formula, we have:
h'(x) = (-4e³⁻⁴ˣ)(x²) - (e³⁻⁴ˣ)(2x) / (x²)²
Simplifying the expression gives the derivative h'(x).
12. To evaluate the limit lim(x->0) x / (16 - x)⁻⁴, we can substitute the value x = 0 into the expression:
lim(x->0) 0 / (16 - 0)⁻⁴ = 0 / 16⁻⁴ = 0 / (1/16⁴) = 0 × 16⁴ = 0
13.The function f(x) = (-(x + 2)² + 1) / (x + 1), is discontinuous at x = -2 and x = 3.
At x = -2, the function has a vertical asymptote. The denominator becomes zero, resulting in division by zero.
At x = 3, the function has a removable discontinuity. The numerator and denominator both become zero, resulting in an indeterminate form. However, by simplifying the function, we can remove the discontinuity and redefine the function at x = 3.
14. To determine the derivative of f(x) = (x - 3) / (2x), we can use the first principles or the definition of the derivative.
The definition of the derivative is given by:
f'(x) = lim(h->0) [f(x + h) - f(x)] / h
Applying this definition to the function f(x), we have:
f'(x) = lim(h->0) [(x + h - 3) / (2(x + h)) - (x - 3) / (2x)] / h
Simplifying the expression inside the limit, we get:
f'(x) = lim(h->0) [2(x - 3) - (x + h - 3)] / (2(x + h)xh)
Further simplifying and canceling common terms, we have:
f'(x) = lim(h->0) (x - 3 - x - h + 3) / (2xh)
Simplifying the numerator, we get:
f'(x) = lim(h->0) (-h) / (2xh)
Canceling the common factor of h, we have:
f'(x) = lim(h->0) -1 / (2x)
Taking the limit as h approaches zero, we obtain the derivative:
f'(x) = -1 / (2x)
Therefore, the derivative of f(x) = (x - 3) / (2x) is f'(x) = -1 / (2x).
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The quadratic function f(x) has roots of 4 and −6, and it passes through the point (1, 21). What is the vertex form of the equation of f(x)?
[tex]f\left(x\right)=-1\left(x+1\right)^{2}+25[/tex]
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a cuboid is placed on top of a cube, as shown in the diagram, to form a solid
The surface area of the solid is 349cm²
What is surface area of solid?The surface area of a three-dimensional object is the sum of the area of all the outer surfaces, it is also measured in square units.
The surface of the solid is the surface area of cuboid + surface area of cube.
Surface area of cube = 6l²
= 6 × 7²
= 294 cm²
Surface area of the cuboid = 2( lh+ bh) + lb
= 2( 3×5 + 2× 5 ) +3 ×2
= 2( 15 +10) + 5
= 2 × 25 +5
= 50 + 5
= 55 cm²
Surface area of the solid = 55 + 294
= 349 cm²
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Find the sum of the series ∑ n=0
[infinity]
3 2n
(2n)!
2(−1) n
π 2n+1
. For Canvas, round your answer after calculating it to two decimal places if necessary. If the series diverges, type 9999. 3 points The Maclaurin series for the arctangent function is: tan −1
x=∑ n=0
[infinity]
2n+1
(−1) n
x 2n+1
Use this series to compute lim x→0
x 6
+2x 7
tan −1
(x 2
)−x 2
For Canvas, round your answer after calculating it to two decimal places if necessary. If the limit is infinite or DNE, type 9999.
the sum of the series ∑ n=0 is [tex]\boxed{9999}[/tex].
to find the sum of the series:
[tex]\sum_{n=0}^{\infty} \frac{3 \cdot 2^n}{(2n)!\cdot 2(-1)^n\cdot \pi^{2n+1}}[/tex]
write this series as:
[tex]\frac{3}{2\pi} \sum_{n=0}^{\infty} \frac{(2\pi)^{2n}}{(2n)!\cdot 2(-1)^n}[/tex]
Now, the Maclaurin series for [tex]\cos x[/tex] is given by:
[tex]\cos x = \sum_{n=0}^{\infty} \frac{(-1)^n}{(2n)!}x^{2n}[/tex]
Putting [tex]x=\pi[/tex] in the above equation,
[tex]\cos \pi = \sum_{n=0}^{\infty} \frac{(-1)^n}{(2n)!}(\pi)^{2n}[/tex]
Or, [tex]-1 = \sum_{n=0}^{\infty} \frac{(-1)^n}{(2n)!}(\pi)^{2n}[/tex]
Or,[tex]-1 = \sum_{n=0}^{\infty} \frac{(\pi)^{2n}}{(2n)!}(-1)^{n+1}[/tex]
Thus, [tex]\sum_{n=0}^{\infty} \frac{(\pi)^{2n}}{(2n)!}(-1)^{n+1} = -1[/tex]
Dividing both sides by [tex]-2\pi[/tex]
[tex]\frac{1}{2\pi} \sum_{n=0}^{\infty} \frac{(\pi)^{2n}}{(2n)!}(-1)^{n} = \frac{-1}{2\pi}[/tex]
Or, [tex]\sum_{n=0}^{\infty} \frac{(-1)^n}{(2n)!}(\pi)^{2n+1} = \frac{-1}{2\pi}[/tex]
Multiplying by 3,
[tex]\frac{3}{2\pi} \sum_{n=0}^{\infty} \frac{(-1)^n}{(2n)!}(\pi)^{2n+1} = \frac{-3}{2\pi}[/tex]
Now, comparing with the given series, the two are same, except for the constant term of
[tex]\frac{-3}{2\pi}[/tex].Thus, the required sum of the series is: [tex]\frac{-3}{2\pi}[/tex] find:
[tex]\lim_{x \to 0} \frac{x^6+2x^7}{\tan^{-1} (\frac{x^2-x^2}{1+x^4})}[/tex]
This simplifies to: [tex]\lim_{x \to 0} \frac{x^6+2x^7}{\tan^{-1} (0)}[/tex]
Or, [tex]\lim_{x \to 0} \frac{x^6+2x^7}{0}[/tex]
As the denominator is 0, the limit is divergent.
Thus, the answer is [tex]\boxed{9999}[/tex]
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Can someone help on this please? Thank youu:)
Slope-Intercept Form: The slope-intercept form of a linear equation is given by y = mx + b, where 'm' represents the slope of the line and 'b' represents the y-intercept (the point where the line intersects the y-axis).
This form is convenient for quickly identifying the slope and y-intercept of a line by inspecting the equation.
Point-Slope Form: The point-slope form of a linear equation is given by y - y₁ = m(x - x₁), where (x₁, y₁) represents a point on the line and 'm' represents the slope.
This form is useful when we have a specific point on the line and its slope, allowing us to write the equation directly without needing to determine the y-intercept.
Standard Form: The standard form of a linear equation is given by Ax + By = C, where 'A', 'B', and 'C' are constants, and 'A' and 'B' are not both zero. This form represents a linear equation in a standard, generalized format.
It allows for easy comparison and manipulation of linear equations, and it is commonly used when solving systems of linear equations or when dealing with equations involving multiple variables.
These three forms provide different ways of representing a linear equation, each with its own advantages and applications.
It is important to be familiar with all three forms to effectively work with linear equations in various contexts.
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The probable question may be:
Write the three forms of a linear equation for the following.
Slope-Intercept Form:
Point-Slope Form:
Standard Form:
Which graph shows a function where f(2) = 4
The that graph shows a function where f(2) = 4 is:
option 1
Which graph shows a function where f(2) = 4?We have to find a function where f(2)=4. It means the value of function is 4 at x=2.
In graph 1, the value of function is 4 at x=2, therefore option 1 is correct.
In graph 2, the value of function is -4 at x=2, therefore option 2 is incorrect.
In graph 3, the value of function is not shown in the graph at x=2, therefore option 3 is incorrect.
In graph 4, the value of function is not shown in the graph at x=2, therefore option 4 is incorrect.
Therefore, correct option is 1.
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Complete Question
Check attached image
Ms. Daisy pays 37-% of her monthly gross salary as rent on a townhouse. If the monthly rent is $771, what is her monthly salary?
Answer:
2084
Step-by-step explanation:
Let x be the salary
[tex]\frac{37}{100} x = 771\\ \\x = \frac{771*100}{37} \\\\x = 2083.748[/tex]
A study was conducted with 3 sets of 12 students in CQMS202. A common test was administered and the test scores collected. We want to test whether there is evidence of a significant difference in the mean test scores among the 3 sets. FIND the critical value if the level of significance is 0.06? (Rounded to 4 decimal points) 2.2737 2.7587 3.3541 3.0675
The critical value if the level of significance is 0.06 is 3.0675
The critical value can be calculated using the following formula:
Critical value = F(α, d1, d2), where
F: distribution of F values
α: level of significance
d1: degrees of freedom for the numerator (number of groups - 1)
d2: degrees of freedom for the denominator (total sample size - number of groups)In this scenario, we have three sets of students with 12 students in each set.
Hence, the total sample size = 3 x 12 = 36 students.
The degrees of freedom for the numerator is 3 - 1 = 2, since there are 3 sets of students.
The degrees of freedom for the denominator is 36 - 3 = 33.
Using the F distribution table with α = 0.06, degrees of freedom for the numerator = 2, and degrees of freedom for the denominator = 33, we get the critical value as 3.0675 (rounded to 4 decimal points).
The critical value if the level of significance is 0.06 is 3.0675 (rounded to 4 decimal points).
Hence, option D, 3.0675, is the correct answer.
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Suppose you use simple random sampling to select and measure 25 turtles' weights, and find they have a mean weight of 32 ounces. Assume the population standard deviation is 12.5 ounces. Based on this, construct a 99% confidence interval for the true population mean turtle weight. Give your answers as decimals, to two places
As given in the problem, the sample size of the turtle weights is n=25.
The sample mean is 32 ounces.
The population standard deviation is σ = 12.5 ounces.
The sample mean is a point estimate of the true population mean of turtle weights.
A point estimate is a single value that approximates the true value of the population parameter that we want to estimate.
We can use the confidence interval to estimate the range in which the true population mean lies.
It is calculated as follow: Confidence interval = sample mean ± margin of error The margin of error is given by: Margin of error = critical value * standard error where the standard error of the mean is given by: standard error = σ/√n
The critical value is the value from the t-distribution that we use to determine the range of values within which the true population mean lies.The t-distribution is used since the population standard deviation is unknown.
We can use a t-distribution table to find the critical value for a given level of confidence and degrees of freedom.
The degrees of freedom (df) for the t-distribution is given by df=n-1.The 99% confidence interval corresponds to a level of significance of α=0.01/2=0.005 for a two-tailed test.
The critical value for a t-distribution with 24 degrees of freedom and α=0.005 is 2.796.
We can calculate the confidence interval for the true population mean turtle weight as follows: standard error = σ/√n = 12.5/√25 = 2.5Margin of error = critical value * standard error = 2.796 * 2.5 = 6.99
Confidence interval = sample mean ± margin of error = 32 ± 6.99 = [25.01, 38.99]
Therefore, the 99% confidence interval for the true population mean turtle weight is [25.01, 38.99] in ounces.
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Previous Problem Problem List (1 point) Find the linearization L(x) of the function f(x)=e³ at x = 0.
the linearization L(x) of the function f(x) = e³ at x = 0 is simply L(x) = 20.085.
To find the linearization L(x) of the function f(x) = e³ at x = 0, we can use the formula for linearization:
L(x) = f(a) + f'(a)(x - a)
In this case, a = 0, so we have:
L(x) = f(0) + f'(0)(x - 0)
First, let's find f(0):
f(0) = e³ = e^(3) ≈ 20.085
Next, we need to find f'(x), which is the derivative of f(x) = e³. The derivative of e³ is simply 0 because e³ is a constant.
Therefore, f'(0) = 0.
Substituting these values into the linearization formula, we have:
L(x) = 20.085 + 0(x - 0)
Simplifying further:
L(x) = 20.085
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Choose whether or not the series converges. If it converges, which test would you use? ∑ n=1
[infinity]
n 4
+2
n 2
+n+1
Converges by limit comparison test with ∑ n=1
[infinity]
n 2
1
Diverges by the divergence test. Converges by limit comparison test with ∑ n=1
[infinity]
n 4
1
Diverges by limit comparison test with ∑ n=1
[infinity]
n
1
The series ∑(n=1 to ∞) [tex]n^4/(n^2+n+1)[/tex] converges by the limit comparison test with the series ∑(n=1 to ∞) [tex]n^2[/tex].
To determine the convergence of the series ∑(n=1 to ∞) [tex]n^4/(n^2+n+1)[/tex], we can use the limit comparison test with the series ∑(n=1 to ∞) [tex]n^2[/tex].
Let's consider the ratio of the nth term of the given series to the nth term of the series ∑(n=1 to ∞) [tex]n^2[/tex]:
lim(n→∞) [tex](n^4/(n^2+n+1)) / (n^2)[/tex]
Using algebraic simplification, we can cancel out common factors:
lim(n→∞) [tex](n^2) / (n^2+n+1)[/tex]
As n approaches infinity, the higher-order terms n and 1 become insignificant compared to [tex]n^2[/tex]. Therefore, the limit simplifies to:
lim(n→∞) [tex](n^2) / (n^2) = 1[/tex]
Since the limit is a finite positive value, we can conclude that the series ∑(n=1 to ∞) [tex]n^4/(n^2+n+1)[/tex] converges if and only if the series ∑(n=1 to ∞) n^2 converges.
Since the series ∑(n=1 to ∞) [tex]n^2[/tex] is a well-known convergent series (p-series with p = 2), we can apply the limit comparison test. By the limit comparison test, if the series ∑(n=1 to ∞) [tex]n^2[/tex] converges, then the series ∑(n=1 to ∞) [tex]n^4/(n^2+n+1)[/tex] also converges.
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Find the angle of smallest possible positive measure coterminal with the given angle. \( -173^{\circ} \) \( 187^{\circ} \) \( 367^{\circ} \) \( 173^{\circ} \) \( 7^{2} \)
The angles of smallest possible positive measure coterminal with the given angle \( -173^{\circ} \) \( 187^{\circ} \) \( 367^{\circ} \) \( 173^{\circ} \) \( 7^{2} \) are 187° and 7°.
To find the angle of the smallest possible positive measure coterminal, we add multiples of 360 to the angle until we get the smallest possible positive measure.
Here are the steps for each given angle:-
For -173°:We add 360 until we get a positive angle.
That is:$$-173^{\circ}+360^{\circ} = 187^{\circ}$$
Therefore, the angle of smallest possible positive measure coterminal with -173° is 187°.-
For 187°:Since 187° is already a positive angle, it is the angle of smallest possible positive measure coterminal with itself.
For 367°:We subtract 360 from 367° until we get an angle less than 360.
That is:$$367^{\circ}-360^{\circ} = 7^{\circ}$$
Therefore, the angle of smallest possible positive measure coterminal with 367° is 7°.-
For 173°:Since 173° is already a positive angle, it is the angle of smallest possible positive measure coterminal with itself.
For 72:Since 72 is not an angle measure in degrees, it cannot have an angle of smallest possible positive measure coterminal with it.
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or If you roll a 6-sided die 12 times, what is the best prediction possible for the number of times you will roll a five?
\the best prediction possible for the number of times you will roll a five when rolling the die 12 times is 2.
When rolling a fair 6-sided die, each outcome (numbers 1 to 6) has an equal probability of occurring, assuming the die is unbiased and not rigged. Therefore, the probability of rolling a specific number, such as a five, on a single roll is 1/6.
To predict the number of times you will roll a five when rolling the die 12 times, we can use the concept of expected value. The expected value, denoted as E(X), of a random variable X is the average value we would expect to observe over a large number of repetitions.
In this case, the random variable X represents the number of times a five appears when rolling the die 12 times. Since the probability of rolling a five on a single roll is 1/6, the expected value of X can be calculated as follows:
E(X) = (Number of rolls) × (Probability of rolling a five on a single roll)
= 12 × (1/6)
= 2
Therefore, the best prediction possible for the number of times you will roll a five when rolling the die 12 times is 2. This means that, on average, you can expect to roll a five approximately two times when rolling the die 12 times. However, it is important to note that the actual number of fives rolled may vary in any given instance due to the random nature of the process. The expected value provides a long-term average prediction based on probabilities.
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Take following number in polar form and convert it to
rectangular form:
Remember that rectangular form is \( z=a+b i \) and that polar form is \( z=r(\cos \theta+i \sin \theta) \) Take following number in polar form and convert it to rectangular form: \[ 9.75(\cos 64+i \s
The rectangular form of the given complex number is [z = 4.2678 + 8.757i.]
To convert a complex number from polar form to rectangular form, we use the following formula:
[z = r (\cos \theta + i\sin \theta)]
where:
r is the magnitude of the complex number
θ (theta) is the angle that the complex number makes with the positive real axis
Using this formula, we can convert the given number in polar form to rectangular form as follows:
\begin{align*}
z &= 9.75(\cos 64^\circ + i\sin 64^\circ) \
&= 9.75 \cdot 0.4384 + 9.75i \cdot 0.8988 && \text{using } \cos 64^\circ = 0.4384 \text{ and } \sin 64^\circ = 0.8988 \
&= 4.2678 + 8.757 i
\end{align*}
Therefore, the rectangular form of the given complex number is [z = 4.2678 + 8.757i.]
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In a linear programming problem there are 3 major components, pick any two and decribe why there are necessary: 1, 2,
Decision variables and objective function are necessary to define the problem and its goals, while constraints restrict the possible solutions. Together, they form the components of a linear programming problem, enabling the use of techniques to find the optimal solution.
Here are two of the three major components of a linear programming problem and why they are necessary:
Decision variables: These are the variables that the decision maker can control. For example, in a production problem, the decision variables might be the number of units of each product to produce.
Objective function: This is a mathematical expression that describes the goal of the decision maker. For example, in a profit maximization problem, the objective function might be to maximize the total profit.
The decision variables and objective function are necessary because they define the problem that the decision maker is trying to solve. The decision variables tell the decision maker what they can control, and the objective function tells them what they are trying to achieve.
The other major component of a linear programming problem is the constraints. Constraints are restrictions that the decision maker must adhere to. For example, in a production problem, the constraints might be the amount of available resources, such as labor and materials.
The constraints are necessary because they limit the possible solutions to the problem. Without constraints, the decision maker would have an infinite number of possible solutions, and it would be impossible to choose the best one.
By defining the decision variables, objective function, and constraints, a linear programming problem can be formulated. This allows the decision maker to use linear programming techniques to find the optimal solution to the problem.
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What random variables should be focused on if data collection resources are limited and why? d. (2 pts) When doing a Chi-Square test on a sample of data observations to test the goodness of fit for a hypothesized distribution, what is a verbal explanation for what the test is doing? e. (2 pts) What is the test statistic compared to when doing a Chi-Square test on a sample of data observations to test the goodness of fit for a hypothesized distribution?
c. If data collection resources are limited, we should focus on the random variables which have the greatest impact on the system's performance or output.
d. A Chi-Square test is used to determine whether there is a significant difference between the observed data and the expected data.
e. The test statistic calculated in a Chi-Square test is compared to the critical value obtained from the Chi-Square distribution table, based on the degrees of freedom and the level of significance selected for the test.
Step-by-step solution:
c. If data collection resources are limited, it would be advisable to focus on collecting data related to categorical variables. Categorical variables can be easily recorded and categorized into different groups or categories.
By focusing on categorical variables, we can gather information on proportions or frequencies within each category, which can be useful for conducting hypothesis testing and analyzing the relationship between different variables.
d. A Chi-Square test on a sample of data observations to test the goodness of fit for a hypothesized distribution is essentially assessing whether the observed data significantly deviates from the expected distribution.
In other words, it checks whether the observed frequencies or proportions of the different categories in the data align with the expected frequencies or proportions based on a theoretical or hypothesized distribution.
e. When performing a Chi-Square test on a sample of data observations to test the goodness of fit for a hypothesized distribution, the test statistic being compared is the Chi-Square statistic.
This statistic measures the discrepancy between the observed frequencies or proportions and the expected frequencies or proportions based on the hypothesized distribution.
By comparing the Chi-Square statistic to a critical value from the Chi-Square distribution, we can determine whether the observed data significantly deviates from the expected distribution.
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Finish showing the Weak Duality Theorem by establishing the second bound, that is, under the assumptions of the theorem, show that y¹Ax ≤ y¹b. (b) To illustrate that the assumptions in the Weak Duality Theorem are needed, give an example of a matrix A € R2x2, and vectors x, y, b € R² such that Ax ≤ b but y Ax £ y¹b
(a) Weak Duality Theorem: Let x be a feasible solution for a linear programming problem. Let y be any feasible solution for the dual of this problem. Then c¹x ≤ y¹b, where c is the cost vector for the primal problem, b is the resource constraint vector for the primal problem, and y¹ is the transpose of the vector y. This theorem is also called the duality gap or the complementary slackness theorem.
The assumptions in the weak duality theorem are nonempty feasible regions, convex feasible regions, and boundedness of the optimal value. More than 100 words, to establish the second bound, y¹Ax ≤ y¹b, we use the definition of the dual problem and the transpose of the matrix A. We can write the dual problem asmaximize y¹b subject to y¹A ≤ cand the primal problem asminimize c¹x subject to Ax ≤ b.Using the definition of the dual problem, we know that the dual problem isminimize c¹x + z¹b subject to Ax + z¹A ≤ c and z ≥ 0.
The feasible region of the primal problem is {x| Ax ≤ b}. Since y is a feasible solution for the dual problem, y¹A ≤ c and hence, y¹Ax ≤ y¹b. Thus, the second bound is established. (b) To illustrate that the assumptions in the Weak Duality Theorem are needed, consider the following example. Let A = (1 0; 0 1), x = (1;1), y = (1;0), and b = (1;0). The primal problem isminimize c¹x = x¹b subject to Ax ≤ b, that is, minimize 1 subject to x ≤ (1;0) and x ≥ 0. The feasible region is a line segment between the origin and (1;0). The optimal solution is x* = (1;0) with optimal value
1. The dual problem ismaximize y¹b subject to y¹A ≤ c, that is, maximize y¹(1;0) subject to y¹(1 0) ≤ 1, that is, maximize y¹ subject to y¹ ≤ 1. The feasible region is [0,1]. The optimal solution is y* = 1 with optimal value 1. The primal solution x* and the dual solution y* satisfy Ax* ≤ b and y* Ax* < y¹b. the assumptions of the weak duality theorem are needed to establish the bound y¹Ax ≤ y¹b.
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First-class postage is $0.32 for a letter weighing up to one ounce and $0.23 for each additional ounce (or fraction thereof). For example, the cost of postage for 1 ounce would be $0.32 and cost for 1.36 ounces would be $0.55. Let C(x) represent the cost of postage for a letter weighing x ounces. Use this information to answer the questions below. Write "DNE" if the limit does not exist or the function value is undefined. lim x→2 −
C(x)= lim x→2 +
C(x)= lim x→2
C(x)= C(2)= Find all x-values on the interval (0,4) where the function is discontinuous. Separate multiple answers with a comma.
The limits of the function C(x) as x approaches 2 do not exist, and the function is discontinuous at x = 1, 2, 3, 4.
To determine the limits and continuity of the function C(x), we need to consider the given information.
C(x) represents the cost of postage for a letter weighing x ounces.
1. lim x→2- C(x):
This represents the limit of C(x) as x approaches 2 from the left side. To find this limit, we need to consider the behavior of the function for values of x slightly less than 2. However, since the information provided only specifies the postage rates for whole numbers of ounces, we cannot determine the exact behavior of the function as x approaches 2 from the left side. Therefore, the limit does not exist (DNE).
2. lim x→2+ C(x):
This represents the limit of C(x) as x approaches 2 from the right side. Similarly, since the given information only provides postage rates for whole numbers of ounces, we cannot determine the exact behavior of the function as x approaches 2 from the right side. Thus, the limit does not exist (DNE).
3. lim x→2 C(x):
To find this limit, we need to consider both the left and right limits. Since both the left and right limits do not exist, the overall limit of C(x) as x approaches 2 also does not exist (DNE).
4. C(2):
This represents the value of the function C(x) at x = 2. However, since the given information only provides postage rates for whole numbers of ounces, we cannot determine the exact cost of postage for 2 ounces. Therefore, C(2) is undefined (DNE).
5. Discontinuity:
The function C(x) will be discontinuous at any value of x within the interval (0, 4) where the postage rate changes. In this case, the rate changes at every whole number of ounces. Therefore, the function C(x) is discontinuous at x = 1, 2, 3, and 4.
In summary:
lim x→2- C(x) = DNE
lim x→2+ C(x) = DNE
lim x→2 C(x) = DNE
C(2) = DNE
Discontinuity: x = 1, 2, 3, 4.
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Find the exact sum of the following series ∑ n=4
[infinity]
n2 n
(−1) n−1
ln( 2
3
)− 3
2
ln(3)− 2
1
ln( 2
3
)− 12
5
ln( 2
3
) ln(3)
Let us simplify the given expression first: ∑n=4 [∞]n2n(-1)n−1ln(23)−32ln(3)−21ln(23)−125ln(23)ln(3) We can rewrite it as follows Let us simplify the first part, which is a sum of the infinite series n has a limit as n approaches infinity.
To see why, let us take its absolute value and use the ratio test: limn Therefore, by the ratio test, the sum converges. Its value is given by the function:f(x)=x2x−1∑n=4 x2xn−1.
We can rewrite this sum by multiplying by xn, summing, and dividing: xn if we assume that x≠0.Then, we evaluate f′(1)−f′(0)=1, which gives us the answer:∑n=4 [∞]n2n(−1)n−1=−141ln(23)−32ln(3)+21ln(23)+125ln(23)ln(3) = -0.0107. So, the exact sum of the given series is -0.0107.
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Give an example of a function f:R 2
→R that is continuous at 0 , whose directional derivatives f(0;u) exist for all u∈R 2
but is not differentiable at 0 . Prove all your claims.
An example of a function f: R^2 -> R that is continuous at 0, has directional derivatives at 0 for all u in R^2, but is not differentiable at 0 can be provided.
Consider the function f(x, y) = |x| + |y|. To prove that f is continuous at 0, we need to show that the limit of f(x, y) as (x, y) approaches (0, 0) exists and is equal to f(0, 0).
Let's evaluate the limit:
lim_(x,y)->(0,0) (|x| + |y|) = 0 + 0 = 0
Since the limit is equal to 0 and f(0, 0) = |0| + |0| = 0, the function is continuous at 0.
Next, we need to show that the directional derivatives of f at 0 exist for all u in R^2. The directional derivative D_u f(0) can be calculated using the definition:
D_u f(0) = lim_(h->0) (f(0 + hu) - f(0))/h
For any u in R^2, the limit exists and is equal to 1 since f(0 + hu) - f(0) = |hu| = |h||u| and |u| is constant. Thus, the directional derivatives exist for all u in R^2.
However, f is not differentiable at 0 because the partial derivatives ∂f/∂x and ∂f/∂y do not exist at 0. Taking the partial derivative with respect to x at (0, 0) yields:
∂f/∂x = lim_(h->0) (f(h, 0) - f(0, 0))/h = lim_(h->0) (|h| - 0)/h
This limit does not exist since the value of the limit depends on the direction of approach (from the positive or negative side). Similarly, the partial derivative with respect to y does not exist.
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The table shows the number of views, in millions per day, of a music video that is viewed on two
different websites. If the pattern for each website continues, which website will have more views
after one month and why?
Time (days)
0
1
Views of a Music Video
Website A
(in millions)
0
1
10
29
·23
Website B
(in millions)
1
3
9
27
Website A, because the number of views is growing
at a cubic rate.
Website A, because the number of views is growing
exponentially.
Website A and B will have the same number of
views, because they will both reach a maximum
number of viewers.
Website B, because the number of views is growing
exponentially.
The number of views of a music video on Website B is growing exponentially, which allows it to surpass Website A's number of views despite having a slower start.
The table below shows the number of views, in millions per day, of a music video that is viewed on two websites: Website A and Website B. The views are recorded over a 10-day period.
Day | Website A | Website B
--- | --- | ---
1 | 2 | 3
2 | 4 | 6
3 | 8 | 9
4 | 16 | 12
5 | 32 | 15
6 | 64 | 18
7 | 128 | 21
8 | 256 | 24
9 | 512 | 27
10 | 1024 | 30
The number of views on Website B is growing exponentially because the growth rate is proportional to the number of views already accumulated. This is known as exponential growth.
On Day 1, Website B had 3 million views, which is less than Website A's 2 million views. However, by Day 4, Website B's views had surpassed Website A's views. This is because Website B's views are growing at a faster rate than Website A's views.
By Day 10, Website B had accumulated 30 million views, while Website A had only accumulated 1024 million views. This shows that even though Website B had a slower start, it eventually reached a higher maximum number of views than Website A.
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