The exact length of the curve y=23(x^2−1)^(3/2), 1≤x≤3, is given by L = (1/9) ∫(sec^(-1)3 to sec^(-1)1) sqrt[9(sec^2θ−1)^2+1] dθ. This integral cannot be evaluated in terms of elementary functions.
To find the length of the curve y = 23(x^2 - 1)^(3/2) from x = 1 to x = 3, we can use the arc length formula:
L = ∫(1 to 3) sqrt[1 + (dy/dx)^2] dx
First, we need to find dy/dx:
dy/dx = 23 * 3/2 * (x^2 - 1)^(1/2) * 2x
= 3x(x^2 - 1)^(1/2)
Now, we can substitute this expression into the arc length formula and integrate:
L = ∫(1 to 3) sqrt[1 + (3x(x^2 - 1)^(1/2))^2] dx
= ∫(1 to 3) sqrt[1 + 9x^2(x^2 - 1)] dx
= ∫(1 to 3) sqrt[9x^4 - 9x^2 + 1] dx
We can solve this integral using trigonometric substitution. Let x = (1/3)secθ, then dx = (1/3)secθ tanθ dθ. Substituting, we get:
L = ∫(θ1 to θ2) [(1/3)secθ * sqrt[9(sec^2θ - 1)^2 + 1]] * (1/3)secθ tanθ dθ
= (1/9) ∫(θ1 to θ2) sqrt[9(sec^2θ - 1)^2 + 1] dθ
where θ1 = sec^(-1)3 and θ2 = sec^(-1)1.
This integral cannot be evaluated in terms of elementary functions, so we can approximate it using numerical methods or leave the answer in this form. Therefore, the exact length of the curve y = 23(x^2 - 1)^(3/2), 1 ≤ x ≤ 3 is:
L = (1/9) ∫(sec^(-1)3 to sec^(-1)1) sqrt[9(sec^2θ - 1)^2 + 1] dθ.
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what evidence shows cultural blending in how muslims studied mathematics?
Muslim scholars blended mathematical ideas from Greece, India, and Persia in the development of algebra and trigonometry.
There is solid proof of social mixing in how Muslims concentrated on arithmetic during the Islamic Brilliant Age, which endured from the eighth to the fourteenth century CE. During this time, researchers from different pieces of the Muslim world, as well as from Greece, India, and Persia, met up to share information and thoughts.
One illustration of this social mixing should be visible in the improvement of variable based math, which was vigorously affected by crafted by Indian mathematicians. Muslim researchers deciphered and developed Indian texts, integrating new ideas and images into their own numerical practices.
One more model is the improvement of geometry, which was impacted by crafted by Greek mathematicians. Muslim researchers deciphered and developed Greek texts, adding new applications and refinements to the discipline.
Generally, the social mixing of numerical thoughts and customs assumed a huge part in the improvement of Islamic science, and assisted with laying out a rich and various heritage that keeps on impacting the field today.
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Given the points (-4, 13) and (6,-2) find the slope in simplest form?
Sorry i miscalculated this one
Answer:
-3/2
Step-by-step explanation:
(see attached for reference)
the formula for slope is given as :
slope, m = (y₂-y₁) / (x₂-x₁)
in our case , we are given
(x₁,y₁) = (-4, 13)
(x₂, y₂) = (6, -2)
substitute these into the formula above:
m = (y₂-y₁) / (x₂-x₁)
= [-2 - 13] / [6 - (-4) ]
= -15 / 10
= -3/2
Find the general solution of the differential equation (x^2 + 1)tan y dy/dx = x. (a) y = C/squareroot x^2 + 1 (b) y = C squareroot x^2 + 1 (c) cos y = C/squareroot x^2 + 1 (d) cos y = C squareroot x^2 + 1 (d) None of these
the general solution of the differential equation is given by cos y = C√(x^2 + 1) The correct option is (d) None of these.
We are given the differential equation:
(x^2 + 1) tan y dy/dx = x
We can solve this equation by separation of variables. We begin by multiplying both sides by dx/tan y:
(x^2 + 1) dy/tan y = x dx
Next, we can use the substitution u = x^2 + 1, which implies du/dx = 2x:
dy/tan y = (x du)/(2u - 2)
We can separate the variables as follows:
(tan y) dy = (x du)/(2u - 2)
We can integrate both sides:
∫(tan y) dy = (1/2)∫(x du)/(u - 1)
Using the substitution v = u - 1, which implies du = dv, we get:
∫(tan y) dy = (1/2)∫x dv/v
Integrating the right-hand side using ln |v| as the antiderivative, we get:
∫(tan y) dy = (1/2) ln |v| + C
Substituting back for v, we get:
∫(tan y) dy = (1/2) ln |u - 1| + C
Substituting back for u and simplifying, we get:
∫(tan y) dy = (1/2) ln |x^2 + 1| + C
Integrating the left-hand side using ln |cos y| as the antiderivative, we get:
ln |cos y| = (1/2) ln |x^2 + 1| + C
Simplifying and exponentiating both sides, we get:
cos y = ±C√(x^2 + 1)
Therefore, the general solution of the differential equation is given by:
cos y = C√(x^2 + 1)
where C is an arbitrary constant. Hence, the correct option is (d) None of these.
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solve t^2y'+2ty-y^3=0
The general solution to the given differential equation is
y = ± √(1 / (2ln|t| + 4/t - C2))
Solution to the differential equationTo solve the given differential equation, we can use the method of separable variables. Let's go through the steps:
Rearrange the equation to separate the variables:
t^2y' + 2ty - y^3 = 0
Divide both sides of the equation by t^2:
y' + (2y/t) - (y^3/t^2) = 0
Now, we can rewrite the equation as:
y' + (2y/t) = (y^3/t^2)
Separate the variables by moving the y-related terms to one side and the t-related terms to the other side:
(1/y^3)dy = (1/t - 2/t^2)dt
Integrate both sides of the equation:
∫(1/y^3)dy = ∫(1/t - 2/t^2)dt
To integrate the left side, let's use a substitution. Let u = y^(-2), then du = -2y^(-3)dy.
-1/2 ∫du = ∫(1/t - 2/t^2)dt
-1/2 u = ln|t| + 2/t + C1
-1/2 (y^(-2)) = ln|t| + 2/t + C1
Multiply through by -2:
y^(-2) = -2ln|t| - 4/t + C2
Now, take the reciprocal of both sides to solve for y:
y^2 = (-1) / (-2ln|t| - 4/t + C2)
y^2 = 1 / (2ln|t| + 4/t - C2)
Finally, taking the square root:
y = ± √(1 / (2ln|t| + 4/t - C2))
Therefore, the general solution to the given differential equation is:
y = ± √(1 / (2ln|t| + 4/t - C2))
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Which variable of time could cause a student’s GPA to increase?
a) sleeping
b) working
c) eating
d) studying
The correct answer is D.
The variable of time that could cause a student’s GPA to increase is studying.
A student’s grade point average (GPA) is a reflection of their academic performance, which is determined by their cumulative grades in classes and academic subjects over a period of time.GPA can be influenced by various factors, including how much time students dedicate to studying, the amount of effort they put in, and how effectively they utilize their study time. Therefore, if students dedicate more time to studying, their grades may improve, resulting in a higher GPA.For such more questions on GPA
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When the coordinates 1 1 4 4 7 1 and 4 â 2 are joined which shape is formed 5 points group of answer choices parallelogram rectangle trapezoid Square?
As per the given graph, the shape of the coordinate is square.
The term coordinate in math is defined as a set of numbers or numbers and letters together that show you a position on a map.
Here we given that the coordinates (1, 1), (4, 4), (7, 1), and (4, -2) are joined.
Then we have to identified the form of the shape that has been formed using the coordinates.
Here we know that when the coordinates are joined, then the following graph can be obtained and when we observe that all the sides of the figure formed are of the same length and the diagonals bisect each other at 90°.
Through the graph we have identified that the lengths of the diagonals are equal and the opposite sides are parallel.
Therefore, the properties of a square are matched.
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If X1,X2, Xn constitute a random sample from population with the mean μ, what condition must be imposed on the constants a1, a2,.......,an so that a1X1 + a2X2 +.....+ anXn is an unbiased estimator of μ?
The condition imposed such that a₁X₁ + a₂X₂ +.....+ aₙXₙ is an unbiased estimator of μ must be that ∑a = 1
We are given that X₁, X₂, ... Xₙ constitute a random sample from the population with the mean μ.
This implies, E(X) = μ
Now we have another set of data here, a₁X₁ + a₂X₂ +.....+ aₙXₙ
For a₁X₁ + a₂X₂ +.....+ aₙXₙ to be an unbiased estimator of μ, we should have
E(∑aX) = μ
or, ∑a E(X) = μ
Now we already know that
E(X) = μ
Hence we get
∑a = 1
Hence condition imposed must be that ∑a = 1
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Correct Question
If X₁, X₂, ... Xₙ constitute a random sample from the population with the mean μ, what condition must be imposed on the constants a₁, a₂, ... aₙ so that a₁X₁ + a₂X₂ +.....+ aₙXₙ is an unbiased estimator of μ?
What is the value of the expression 10 + ( fraction 1 over 2 )4 ⋅ 48? (1 point) a 12 b 13 c 16 d 18
And The Answer is:
..........a)12
A nursery owner buys 7 panes of glass to fix some damage to greenhouse. The 7 panes cost $20.65. Unfortunately, breaks 3 more panes while repairing the damage. What is the cost of another panes of glass?
4a−2(3a+8)=6 what is the answer
Answer:
\( \boxed{ \bold{ \huge{ \boxed{ \sf{a = - 11}}}}}\)
Step-by-step explanation:
\( \sf{4a - 2(3a + 8) = 6}\)
Distribute 2 through the parentheses
\( \longrightarrow{ \sf{4a - 6a - 16 = 6}}\)
Collect like terms
\( \longrightarrow{ \sf{ - 2a - 16 = 6}}\)
Move 16 to right hand side and change it's sign
\( \longrightarrow{ \sf{ - 2a = 6 + 16}}\)
Add the numbers: 6 and 16
\( \longrightarrow{ \sf{ - 2a = 22}}\)
Divide both sides by 2
\( \longrightarrow{ \sf{ \frac{ - 2a}{ - 2} = \frac{22}{ - 2}}} \)
Calculate
\( \longrightarrow{ \sf{a = - 11}}\)
Hope I helped !
Best regards! :D
Johnny brings 5 pounds of apples to soccer practice. There are a total of 16 apples in the bag. If each apple is the same size, how much does each apple weigh?
Answer:
5/16= 0.3125 lbs
Step-by-step explanation:
Answer:
the answer is 80 can i have brainlyist for answeroing first
Step-by-step explanation:
Could someone please help. please help asap I need it. see picture...
find the x- and y-intercepts
and write The equation in standard form with integer coefficients
The x-intercept is 5 and the y-intercept is 2.
The standard form of the line is 2x + 5y = 10.
How to find the x-intercept, y-intercept and equation in standard form?The x-intercept is the point where a line crosses the x-axis, and the y-intercept is the point where a line crosses the y-axis. In other words, the x -intercept is the value of x when y = 0 and the y-intercept is the value of y when x = 0.
Hence, the x-intercept is 5 and the y-intercept is 2.
Let's find the equation in standard form.
Ax + By = C
where
A, B and C are constantUsing slope intercept form,
y = mx + b
where
m = slopeb = y-interceptHence, using (5, 0) and (0, 2)
m = 2 - 0 / 0 - 5
m = - 2 / 5
Therefore.
y = - 2 / 5x + 2
Hence, let's multiply through by 5 to eliminate the fraction
5y = -2x + 10
Therefore, the standard form is as follows:
2x + 5y = 10
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find the value of x.
classify the triangle.
Step-by-step explanation:
2x, and it's acute isoscels triangle!
Hey love!
Answer:
x = 67.5 deg
Classification: Acute isosceles triangle
Step-by-step explanation:
We know that x is equal on both sides, since a whole triangle equals 180 degrees we can subtract 45 degrees from 180 dividing it into two, equaling a acute triangle since every degree is under 90 in an isosceles shape.
Hope this helps you out! ✿◕ ‿ ◕✿ Sincerely, Kelsey from Brainly.
~ #LearnWithBrainly ~
Household Income (thousands)
38
45
76
93
50
54
29
44
62
31
The household incomes for 10 different households are shown. What is the mean absolute deviation for the group (round to the
nearest tenth)?
The mean absolute deviation for the group of household incomes is approximately 14.8 (rounded to the nearest tenth).
To calculate the mean absolute deviation (MAD) for a group of data, we follow these steps:
Find the mean (average) of the data set.
Subtract the mean from each data point, obtaining the deviations.
Take the absolute value of each deviation.
Find the mean of the absolute deviations.
Given the household incomes for 10 different households:
38, 45, 76, 93, 50, 54, 29, 44, 62, 31
Let's calculate the MAD step by step:
Find the mean (average):
Mean = (38 + 45 + 76 + 93 + 50 + 54 + 29 + 44 + 62 + 31) / 10
Mean = 482 / 10
Mean = 48.2
Calculate the deviations:
Deviation for each data point = Data point - Mean
Deviation for 38 = 38 - 48.2 = -10.2
Deviation for 45 = 45 - 48.2 = -3.2
Deviation for 76 = 76 - 48.2 = 27.8
Deviation for 93 = 93 - 48.2 = 44.8
Deviation for 50 = 50 - 48.2 = 1.8
Deviation for 54 = 54 - 48.2 = 5.8
Deviation for 29 = 29 - 48.2 = -19.2
Deviation for 44 = 44 - 48.2 = -4.2
Deviation for 62 = 62 - 48.2 = 13.8
Deviation for 31 = 31 - 48.2 = -17.2
Take the absolute value of each deviation:
Absolute deviation for each data point = |Deviation|
Absolute deviation for -10.2 = 10.2
Absolute deviation for -3.2 = 3.2
Absolute deviation for 27.8 = 27.8
Absolute deviation for 44.8 = 44.8
Absolute deviation for 1.8 = 1.8
Absolute deviation for 5.8 = 5.8
Absolute deviation for -19.2 = 19.2
Absolute deviation for -4.2 = 4.2
Absolute deviation for 13.8 = 13.8
Absolute deviation for -17.2 = 17.2
Find the mean of the absolute deviations:
Mean Absolute Deviation (MAD) = (10.2 + 3.2 + 27.8 + 44.8 + 1.8 + 5.8 + 19.2 + 4.2 + 13.8 + 17.2) / 10
MAD = 148 / 10
MAD = 14.8
To the nearest tenth, this means that the mean absolute deviation for the group of household incomes is around 14.8.
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A library labels each book with a six-character code to identify the book in its computer system. The first character is either a letter or digit, and this is followed by three digits, then two letters. How many different codes are possible
Answer: There are 24336000 different codes that are possible.
Step-by-step explanation:
We know that,
Total alphabets = 26
Total digits = 10
Choices for First place = 26+10=36
Choices for next 3 places = 10 x 10 x 10 = 1000
Choices for last 2 places = 26 x 26 = 676
Total different codes are possible = 36 x 1000 x 676
=24336000
Hence, there are 24336000 different codes that are possible.
Three integers have a mean of 9 a median of 9 and a range of 10
Find the three integers
5. Merissa wants to borrow $12,000 to purchase a used boat. After looking at her monthly budget, she
realizes that all she can afford to pay per month is $250. The bank is offering a 6.1% loan. What should
the length of her loan be so that she can keep within her budget?
(250
23.1 months long should the loan last for her to stay inside her spending limit.
Given that,
Merissa needs a $12,000 loan to buy a used yacht. She examines her monthly spending plan and determines that $250 is the most she can afford to pay each month. A 6.1% loan is available from the bank.
We have to find how long should the loan last for her to stay inside her spending limit.
We know that,
A series of payments made over time are called an annuity.
The future value = annuity x [(1 + i)ⁿ - 1] / i
This can be calculated using the formula for future value annuities, which is;
FV(annuity) = P [(1 + i)ⁿ - 1] / i
So,
12000 = 250 ((1 + 0.061)ⁿ)-1) / 0.061
Now n will be
n = 23.1 approximately 2 years.
Therefore, 23.1 months long should the loan last for her to stay inside her spending limit.
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The main strength of projective tests is that: different examiners are likely to find very similar results if they give the test to the same individual. the tests are valid, meaning they measure what they are supposed to measure.
The main strength of projective tests is that they have high inter-rater reliability, meaning different examiners are likely to find similar results when administering the test to the same individual.
The main strength of projective tests lies in their ability to yield consistent results across different examiners. This high inter-rater reliability ensures that if multiple examiners administer the test to the same individual, they are likely to arrive at similar findings. This reliability is important in establishing the consistency and trustworthiness of the test.
Furthermore, projective tests are often considered valid, meaning they measure the psychological constructs or traits they are designed to assess. Although projective tests rely on subjective interpretation and are not as standardized as other psychological assessment methods, they can provide valuable insights into an individual's thoughts, feelings, and motivations. They allow individuals to project their unconscious or hidden aspects onto ambiguous stimuli, providing a window into their psychological functioning.
Overall, the main strengths of projective tests lie in their inter-rater reliability and potential for valid psychological assessment, offering unique perspectives and understanding of individuals' inner experiences.
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A coordinate grid with 2 lines. One line, labeled f(x) passing through (negative 2, 4), (0, 2), and the point (1, 1). The other line is labeled g(x) and passes through (negative 3, negative 3), (0, 0) and the point (1, 1). Which input value produces the same output value for the two functions on the graph?
The input value that produces the same output value for f(x) and g(x) on the graph is x = 1.To find the input value that produces the same output value for both functions, we need to determine the x-coordinate of the point(s) where the two lines intersect.
These points represent the values of x where f(x) and g(x) are equal.
The line labeled f(x) passes through the points (-2, 4), (0, 2), and (1, 1). Using these points, we can determine the equation of the line using the slope-intercept form (y = mx + b). Calculating the slope, we get:
m = (2 - 4) / (0 - (-2)) = -2 / 2 = -1
Substituting the point (0, 2) into the equation, we can find the y-intercept (b):
2 = -1(0) + b
b = 2
Therefore, the equation for f(x) is y = -x + 2.
Similarly, for the line labeled g(x), we can use the points (-3, -3), (0, 0), and (1, 1) to determine the equation. The slope is:
m = (0 - (-3)) / (0 - (-3)) = 3 / 3 = 1
Substituting (0, 0) into the equation, we can find the y-intercept:
0 = 1(0) + b
b = 0
Thus, the equation for g(x) is y = x.
To find the input value that produces the same output for both functions, we can set the two equations equal to each other and solve for x:
-x + 2 = x
Simplifying the equation:
2x = 2
x = 1.
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One angle of an isosceles triangle measures 112°. What measures are possible for the
other two angles? Choose all that apply.
30°
35°
760
340
Answer:
34°
Step-by-step explanation:
A triangle measures 180°
An isosceles triangle has two angles and sides with equal measurements.
We know that one angle is 112°. Thus, we can use that to form an equation to solve for the unknown values:
112° + x + x = 180°
112° + 2x = 180°
2x = 68
x = 34°
The other two angles each measure 34°.
Check:
112 + 34 + 34 = 180
hope this helps and is right!! p.s. i really need brainliest :)
Answer:
34°
Step-by-step explanation:
Sum of interior angles of a triangle is 180°
Two of the interior angles of an Isosceles triangle are equal
Given one of the interior angles is 112° then the remaining two angle must be equal:
⇒ 112 + 2x = 180
⇒ 2x = 68
⇒ x = 34°
If 4 gallons of milk cost $16.24, how much would 7 gallon of milk cost
Answer:
$28.42
Step-by-step explanation:
First let's calculate the cost per gallon.
We can do this by simply dividing the cost of 4 gallons by 4
1 gallon of milk cost 16.24/4 = 4.06
We want to find the cost of 7 gallons.
We can easily do this by multiplying the cost of one gallon by 7
7 gallons of milk cost 7 * 4.06 = $28.42
Draw parallel to . You can draw any length and place it anywhere on the coordinate plane, but not on top of .Find and record the ratio, n, of the length of to the length of . Then, multiply the length of by n and record the resulting length.
In a diagram,
Then,
\(\frac{DE}{BC}=n\)For example, suppose that n=2; thus,
\(DE=2BC\)\(\Rightarrow2\cdot CA\)We can form a new triangle DEF whose side EF is parallel to CA; therefore,
\(\Rightarrow EF=2CA\)Consider the equation ex+2^-x+2 cos x-6= 0.
Find an approximation of it's root in [1.2] to an absolute error less than 10^-10 with one of the methods covered in class.
The given equation is ex+2^-x+2 cos x-6= 0. We are to find an approximation of its root in [1.2] to an absolute error less than 10^-10 with one of the methods covered in class.
Therefore, the correct option is (D)
Let's check the given equation graphically in the given interval i.e [1.2]We can use Newton Raphson method to approximate the root of the equation. Newton Raphson MethodNewton Raphson method is used to find the roots of a differentiable function. Newton Raphson method is based on the following formula:Xn+1 = Xn- f(Xn)/f'(Xn)Where,Xn = Current approximationXn+1 = Next approximationf(Xn) = Function value at Xnf'(Xn) = Derivative of function at XnHere, the given function is ex+2^-x+2 cos x-6= 0.Let's find its derivative:dx/dy (ex+2^-x+2 cos x-6)= ex - 2^-x ln 2 - 2 sin xHere, x = 1.2Taking initial approximation X0 = 1.2
Using the Newton Raphson formula
X1 = X0 - f(X0)/f'(X0)
Putting the values:
f(X0) = e1.2 + 2^-1.2 + 2 cos 1.2 - 6 = -0.287
f'(X0) = e1.2 - 2^-1.2 ln 2 - 2
sin 1.2 = 2.2311 X1 = 1.2 - (-0.287/2.2311) = 1.327091X1 = 1.327091 Now, Let's find the absolute error.Absolute Error = | X1 - X0 |Absolute Error = | 1.327091 - 1.2 | = 0.127091 Since the value of absolute error is greater than 10^-10, we need to perform one more iteration.Using X0 = 1.327091Using the Newton Raphson formula
X2 = X1 - f(X1)/f'(X1)Putting the values:
f(X1) = e1.327091 + 2^-1.327091 + 2 cos 1.327091 - 6 = -0.00000002925f
'(X1) = e1.327091 - 2^-1.327091 ln 2 - 2 sin 1.327091 = 2.225228576X2 = 1.327091 - (-0.00000002925/2.225228576) = 1.3270910564Now, let's find the absolute error. Absolute Error = | X2 - X1 |Absolute Error = | 1.3270910564 - 1.327091 | = 0.0000000564Since the absolute error is less than 10^-10, we can say that the approximation of the root in [1.2] is 1.3270910564.
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5. ( 30pts) Using the master theorem, find Θ-class of the following recurrence relatoins a) T(n)=2T(n/2)+n
3
b) T(n)=2T(n/2)+3n−2 c) T(n)=4T(n/2)+nlgn
Using the master theorem, the Θ-class are: a) T(n) = Θ(n)b) T(n) = Θ(n) and c) T(n) = Θ(√n log n).
a) T(n)=2T(n/2)+n³
To find the Θ class of T(n), we need to apply the Master Theorem. In the Master Theorem, if T(n) = aT(n/b) + f(n) where a >= 1, b > 1, and f(n) is an asymptotically positive function, then:
T(n) = Θ(nᵈ)
where d = logₐ(b).
Here a = 2, b = 2 and f(n) = n³.
So, d = log₂(2)
= 1T(n)
= Θ(nᵈ)
= Θ(n¹)
= Θ(n)
Therefore, the Θ class of T(n) is Θ(n).
b) T(n)=2T(n/2)+3n−2
Similarly to part (a), we can find the Θ class of T(n) by using the Master Theorem.
In this case, a = 2, b = 2 and f(n) = 3n - 2.
Here, d = log₂(2)
= 1T(n)
= Θ(nᵈ)
= Θ(n¹)
= Θ(n)
Therefore, the Θ class of T(n) is Θ(n).
c) T(n)=4T(n/2)+nlogn
For this recurrence relation, a = 4, b = 2 and f(n) = nlogn.
In this case, d = log₄(2) = 0.5.
So,
T(n) is
= Θ(nᵈ)
= Θ(n⁰.⁵)
= Θ(√n log n)
Therefore, the Θ class of T(n) is Θ(√n log n).
Hence, the correct options are:a) T(n) = Θ(n)b) T(n) = Θ(n)c) T(n) = Θ(√n log n).
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Is ΔABC ~ ΔLMN? If so, name which similarity postulate or theorem applies.
Step-by-step explanation:
sss similarity theorem
School ends at 3:15 pm. The school provides after -school care for a maximum of 150 minutes after school ends. When is the latest time for pick up?
The latest time for pickup, found by converting the 150 minutes maximum time provided by the school, from minutes to hours is about 5:45 pm
How can minutes be converted into hours?Minutes can be converted into hours by dividing the number of minutes by 60, which is the number of minutes in an hour.
The time that school ends = 3:15 pm
The latest time for pick up after school care = 150 minutes after school ends
Therefore, the latest time for pick up after school care = 3:15 pm + 150 minutes
60 minutes = 1 hour
150 minutes = (1/60) × 150 = 2.5
The latest for pick up = 3:15 pm + 2.5 hours = 5:45 pm
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Dana buys dress shirts from a clothing manufacturer for s dollars each, and then sells the dress shirts in her retail clothing store at a 35% markup.
a. Write the mark up as a decimal.
b. Write two expressions for the retail price of the dress shirt.
c. What is the retail price of a dress shirt that Dana purchased for $32.00?
d. How much was added to the original price of the dress shirt?
a cylindrical can is to be made to hold 1.4 l of oil. find the dimensions that will minimize the cost of the metal to manufacture the can
The dimensions of the cylindrical can that will minimize the cost of the metal to manufacture it is 0.04 m and 0.027 m for height and radius respectively.
The given information of the question is that we have to create a cylindrical can that holds 1.4 litres of oil and we have to find the dimensions that will minimize the cost of the metal to manufacture the can.
We will solve the given problem through Lagrange Multipliers method.
Steps for solving the given problem are as follows:
Step 1: Let us assume that the cylindrical can has radius r and height h.
Therefore, we have to find the dimensions of r and h to minimize the cost of the metal.
Step 2: The total surface area (SA) of the cylindrical can is given as: SA = 2πr² + 2πrh
This equation represents the cost of the metal to manufacture the cylindrical can.
Step 3: The volume of the cylindrical can is given as: V = πr²h = 1.4 litres.
Now, let us convert 1.4 litres into cubic metres.
1 litre = 10⁻³ cubic metres 1.4 litres = 1.4 × 10⁻³ cubic metres
V = 1.4 × 10⁻³ = πr²h
Therefore, h = (1.4 × 10⁻³)/(πr²)
Step 4: Now, we have to use the Lagrange Multipliers method to find the dimensions that will minimize the cost of the metal.
Let us assume that C is the cost of the metal.
C = k(2πr² + 2πrh)
This is the objective function.
Now, let us assume that f is the constraint function.
f = πr²h - 1.4 × 10⁻³
This is the constraint function.
Step 5 : The next step is to find the partial derivatives of both the objective function and the constraint function with respect to r, h and λ (Lagrange Multiplier).
∂C/∂r = 4πrk + 2πh∂C/∂h
= 2πr(k + λ) + 2πr²∂C/∂λ
= f∂f/∂r
= 2πrh∂f/∂h
= πr²∂f/∂λ
= 0
Step 6: Now, we have to solve these equations and find the values of r and h that minimize the cost of the metal.
4πrk + 2πh = 2πr(k + λ) + 2πr²......(1)πr²h = 1.4 × 10⁻³......(2)
2πrh = λπr²......(3)
Substitute (3) in (1) and simplify it.
4πrk + 2πh = 2πr(k + λ) + 2πr²2πr(k + λ) + λπr² = 2πr² + 2πhλr² = 2h/k
Substitute λr² = 2h/k in (2) and simplify it.
π(2h/k) = 1.4 × 10⁻³h
= (1.4 × 10⁻³)(k/2π)π(2/k)(1.4 × 10⁻³)(k/2π)
= 1.4 × 10⁻³r²
= 1.4 × 10⁻³/(2πh/k)
= 0.00001003h
= 0.04 m and r
= 0.027 m.
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find the angle in the attachment
In the video about the construction of the insect phylogeny, the researchers faced the problem that there was not enough computational power in all of the world to construct every possible tree. What was the researchers’ solution?.
In the video about the construction of the insect phylogeny, the researchers faced the problem that there was not enough computational power in all of the world to construct every possible tree.
The use of computing algorithms, tools, and programmes to phylogenetic analysis is known as computational phylogenetics. The purpose is to create a phylogenetic tree that represents a hypothesis about a set of genes, species, or other taxa's evolutionary ancestry.
There was not enough computational power to construct every possible tree in all of the world. So the probable solution for this problem will be:
Use math to avoid constructing improbable trees
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