Answer:
The answer is 6cm/min = 0.001 m/sec
(1 point) Suppose that we use Euler's method to approximate the solution to the differential equation dy dx 0.4) = 2 Let f(x,y) = x/y. We let Xo = 0.4 and yo = 2 and pick a step size h = 0.2. Euler's method is the the following algorithm. From X, and your approximations to the solution of the differential equation at the nth stage, we find the next stage by computing *n+1 = x + h. Yn+1 = y + h. (XY). Complete the following table. Your answers should be accurate to at least seven decimal places. Yn 0 0.4 1.6 2.0077 2 0.8 2.007776 31 2.0404 nx 2 4 1.2 2.1384 5 1.4 2.3711 The exact solution can also be found using separation of variables. It is y(x) = 2.8247 Thus the actual value of the function at the point x = 1.4 y(1.4) = 2.8247
The actual value of the function at the point x = 1.4 is 2.8247.
To complete the table using Euler's method, we start with the initial condition (X₀, y₀) = (0.4, 2) and the step size h = 0.2. We can calculate the subsequent values as follows:
n | Xn | Yn | Y_exact
0 | 0.4 | 2 | 2.0000000
1 | 0.6 | 2.4 | 2.0135135
2 | 0.8 | 2.7762162 | 2.0508475
3 | 1.0 | 3.1389407 | 2.1126761
4 | 1.2 | 3.5028169 | 2.2026432
5 | 1.4 | 3.8722405 | 2.3265306
To calculate Yn, we use the formula: Yn+1 = Yn + h * f(Xn, Yn) = Yn + h * (Xn / Yn). Here, f(X, Y) = X / Y.
As you mentioned, the exact solution is y(x) = 2.8247. To find y(1.4), we substitute x = 1.4 into the exact solution:
y(1.4) = 2.8247
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suppose an algorithm is o(n), where n is the input size. if the size of the input is doubled, how will the execution time change?
If an algorithm is O(n), where n is the input size, then the execution time will scale linearly with the input size.
If an algorithm is O(n), where n is the input size, then the execution time will scale linearly with the input size. Therefore, if the input size is doubled, the execution time will also double. Mathematically, this can be expressed as:
Execution Time (With Doubled Input Size) = 2*Execution Time (With Original Input Size).
For example, if the execution time for an algorithm with an input size of 8 is 10 seconds, then the execution time for an input size of 16 will be 20 seconds. This is due to the fact that the algorithm's complexity is linear, and thus its runtime increases linearly with the input size.
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Use the information about the graph of a polynomial function to determine the function. Assume the leading coefficient is 1 or −1. There may be more than one correct answer.
The y-intercept is
(0, 9).
The x-intercepts are
(−3, 0), (3, 0).
Degree is 2.
End behavior: as
x → −[infinity],
f(x) → −[infinity],
as
x → [infinity],
f(x) → −[infinity].
polynomial function is as follows:
we get: f(x) = -3/4x² + 27/4
Given the information about the graph of a polynomial function is as follows:
y-intercept is (0,9)
The x-intercepts are (-3, 0), (3,0)
Degree is 2
End behavior: as x → -∞, f(x) → -∞, as x → ∞, f(x) → -∞The standard form of a quadratic function is f(x) = ax² + bx + c, where a, b, and c are real numbers and a ≠ 0.
The degree of the function is given to be 2, which means that the leading coefficient is a quadratic polynomial, and it has at least one x-intercept.
The leading coefficient is assumed to be 1 or -1 since it is not given.
Let's determine the quadratic function using the given intercepts:
When x = 0, y = 9. Therefore, the constant term in the quadratic function is c = 9.
The x-intercepts are (-3, 0) and (3, 0).
Thus, (x + 3) and (x - 3) are factors of the quadratic function.
Therefore, the quadratic function is in the form off
(x) = a(x + 3)(x - 3) + 9
We can substitute one of the points to determine the value of the leading coefficient.
Substituting the point (3, 0), we have: 0 = a(3 + 3)(3 - 3) + 9
Simplifying the equation, we get: 0 = 12a + 9a = -3/4
The quadratic function is:
f(x) = -3/4(x + 3)(x - 3) + 9
Multiplying the terms and collecting like terms, we get:
f(x) = -3/4x² + 27/4
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Which ordered pairs are on the line with the equation y+3.5=0.75(x−2)? Select each correct answer. A. (4, −2) B. (1, 1.75) C. (7, 5.5) D. (−4, −8)
Answer:
A
Step-by-step explanation:
Answer: 4, -2
Step-by-step explanation: I just visualized the graph in my head and went from there
Photos-To-Go printed 2,102 copies of a brochure for a travel agency. The brochure included 5 photos of popular vacation destinations. How many times will all 5 photos appear in all of the printed brochures? How do you know your answer is reasonable?
Answer:
All 5 photos will appear once in all the printed brochures
Step-by-step explanation:
Given
\(Copies = 2102\)
\(Photos =5\)
Required
The number of times the photo will appear
The interpretation of the question is to determine the number of times the 5 photos will appear in each copy.
From the question, we understand that the photos will appear once in a copy.
By extension, the 5 photos will appear once in other copies.
how many paths are there from (0,0) to (13,11), where each step consists of going one unit up or one unit to the right, and path has to go through (3,3) and (7,7)?
The number of paths will be 1248072.
You must move 24 times, up 13 times, and right 11 times.
Consider placing a 13 up and 11 right order.
24 objects can be ordered in 24 different ways.
Both the sequence of the ups and the sequence of the rights are irrelevant.
Because there are 13 possible orders for the ups, you must divide by 13.
Because there are 11 different ways to number rights, you must also divide by 11.
So, The number of paths = 24! / (13! × 11!) = 1248072.
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If 1200 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box.
If 1200 square centimeters of material is available to make a box with a square base and an open top,
The largest possible volume of the box is V = 4000cm^3.
We have 1200 cm^2 worth of material. This represents the surface area of a box with a square base and an open top.
the dimensions of the box.
Square base implies the length and width are the same.
Let x = length/width.
The box has a height as well.
Let h = height
the surface area ; S.
S = (area of base) + (area of 4 walls)
The area of the base is x^2
The area of one of the walls is length times height, or xh. Since there are 4 of them, it would be 4 times xh, or 4xh.
S = x^2 + 4xh
And we know that S = 1200cm^2, so
x^2 + 4xh = 1200
Let's solve for h.
4xh = 1200 - x^2
h = (1200 - x^2) / (4x)
we require the volume formula.
V = (length) x (width) x (height)
And we know all of these.
V = (x)(x)(h)
V = (x^2) h
putting h = (1200 - x^2) / (4x) in the formula
V = (x^2) ( 1200 - x^2)/(4x)
We get a cancellation,
V = x(1200 - x^2)/4
V = (1/4)x (1200 - x^2)
This will be our volume function, V(x).
V(x) = (1/4)(x)(1200 - x^2)
To maximize V(x), we must first take the derivative and then make it 0. Using the product rule (and ignoring the constant 1/4), we have
V'(x) = (1/4) [ (1200 - x^2) + (x)(-2x) ]
Simplify,
V'(x) = (1/4) [ 1200 - x^2 - 2x^2 ]
V'(x) = (1/4) [ 1200 - 3x^2 ]
V'(x) = (1/4) [ 3(400 - x^2) ]
V'(x) = (3/4) [ 400 - x^2 ]
To maximize, make V'(x) = 0, and solve for x.
0 = (3/4) [ 400 - x^2 ]
0 = 400 - x^2
x^2 = 400
x = +/- 20
Therefore,
x = { 20, -20 }
However, since x represents a dimension, it can never be negative, and we must discard the negative solution. That means
x = 20.
This tells us that the maximum volume occurs when x = 20. However, the question is asking WHAT the largest volume of the box is. Solving this is as simple as plugging x = 20 into our volume function, V(x).
V(x) = (1/4)(x)(1200 - x^2)
Therefore,
V(20) = (1/4) (20) (1200 - 20^2)
V(20) = (1/4) (20) (1200 - 400)
V(20) = (1/4) (20) (800)
V(20) = (20/4)(800)
V(20) = 5(800)
V = 4000cm^3
Hence the answer is, the largest possible volume of the box is V = 4000cm^3.
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a seven-sided number cube with the sides numberd 1,2,3,4, 5, 6, 7 is rolled once. What is the probability that an even number less than five is rolled?
6/7
5/7
2/7
9/49
Answer:
i think it 2/7
Step-by-step explanation:
im sorry if wrong
Select the point - slope form of the line
Select one:
a.
y − y1 = m ( x − x1 )
b.
ax + by + c = 0
c.
x / a + y / b = 1
d.
y = mx + b
Answer:
y − y1 = m ( x − x1 )
Step-by-step explanation:
Point slope form would include a slope 'm' and a point (x1, y1).
The first option is the general formula for point-slope form.
B is standard form for a straight line (it can also be Ax + By = C)
C is intercept form.
D is slope-intercept form.
Hope this helps.
A transportation company was interested in the number of miles that residents of the metropolitan area travel by car per day. It argued that the number of miles that the western residents of the metropolitan area travel more than the eastern residents of the metropolitan area per day. They randomly selected 13 western residents and 13 eastern residents with the following data, at a significance level of 0.01:
Western Eastern Difference
Mean 20.1 18.5 1.6
Sample Size 13 13 13
Standard Deviation 8.41 7.38 4.58
Required:
Is it a one-tailed problem or a two-tailed problem?
Given statement solution is :- The alternative hypothesis suggests a one-sided (one-tailed) test, focusing on whether the mean number of miles traveled by western residents is greater than that of eastern residents. In this scenario, it is a one-tailed problem.
To determine whether it is a one-tailed or two-tailed problem, we need to examine the hypothesis being tested.
In this case, the transportation company is interested in whether the number of miles traveled by residents of the western and eastern metropolitan areas differ. They argue that the number of miles traveled by western residents is more than that of eastern residents.
If we set up our hypotheses as follows:
Null Hypothesis (H₀): The mean number of miles traveled by western residents is not significantly different from the mean number of miles traveled by eastern residents (μw - μe = 0).
Alternative Hypothesis (H₁): The mean number of miles traveled by western residents is significantly greater than the mean number of miles traveled by eastern residents (μw - μe > 0).
The alternative hypothesis suggests a one-sided (one-tailed) test, focusing on whether the mean number of miles traveled by western residents is greater than that of eastern residents.
Therefore, in this scenario, it is a one-tailed problem.
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? That is how you write the answer.
All the possible values of x are given as follows:
26 < x < 28.
What is the condition for 3 lengths to represent a triangle?In a triangle, the sum of the lengths of the two smaller sides has to be greater than the length of the greater side.
If 27 is the greater side, we have that:
x + 1 > 27
x > 26.
If x is the greater side, we have that:
x < 27 + 1
x < 28.
Hence the interval of possible values is given as follows:
26 < x < 28.
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Will mark u BRAINLIEST! Please help this is due ASAP
Answer + Explanation:
let x be the measure of angle x
let y be the measure of angle y
\(\left \{ {{x + y = 180} \atop {x=24+y}} \right.\)
Now, solve:
plug x = 24 + y into x + y = 180
24 + y + y = 180
24 + 2y = 180
2y = 156
y = 78
Now, plug this back into the equation x = 24 + 78
x = 102
Answer:
x= 102
y= 78
Step-by-step explanation:
x+y=180
x= y + 24
2x-24 = 180
HELP ME PLEASE IM STUCK QUICK
Answer:
I don't know which one you meant sorry
All of them?
Only one?
two of them?
Sorry
Simplify: 76 ÷ 72. 7 3 7 8 7 4 7 12
We can simplify the fraction by dividing both numbers by 4 (or by 2 two times), we will get the equivalent fraction 19/18
How to simplify the quotient?Here we have a quotient (or we can also call it a fraction) which is:
76/72
To simplify any fraction, what you need to do is divide both numerator and denominator by the same number.
For example, if we use 2, we will get:
76/2 = 38
72/2 = 36
then we have the equivalent fraction.
38/36
But we can keep simplifying this, divide by 2 again:
38/2 = 19
36/2 = 18
We get:
19/18
We can't simplify this anymore because 19 is prime.
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A group of four friends goes to the movies. Each friend pays for a ticket, a snack, ana
drink. The ticket costs d dollars. The snack costs 1.5 times the price of a ticket
The drink costs $1.25 less than the ticket.
The expression 4d + 4(1.5d) + 4(d - 1.25) represents the amount the
riends pay altogether in dollars.
Which part of the expression represents the total amount the friends
pay for snacks?
d - 1.25
1.5d
4(1.50)
4d - 1.25)
Answer:
the answer is
4(1.5d)
Step-by-step explanation:
hope it help
The expression of the total amount paid on snacks is 4(1.5d).
What is the expression?The expression is a sentence with multiple variables and constants connected via mathematical operator. An expression cannot have an equal to “=” sign.
It is known that the cost of a snack for 1 friend is 1.5 times the price of the ticket, d. So, the cost of a snack for 1 friend will be 1.5d
Multiply the cost of snacks for 1 friend by 4, to determine the total cost spent by 4 friends on snacks.
4(1.5d)
Thus, the expression for the total amount spent on snacks will be 4(1.5d).
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a bank is worried about a portfolio of 5 loans that it currently has on its books. it judges that the probability of default for each of these loans is 25%. the amount of money that the bank will lose if a default happens on each of these loans is random and has an independent normal distribution with mean $25,000 and sd $5000. assuming that the defaults are independent:
The expected loss due to default on the portfolio of 5 loans is 6,250, and the standard deviation of the expected loss is 556.25.
The expected loss due to default on the portfolio of 5 loans is given by the formula:
Expected Loss = Probability of Default x Expected Loss per Loan
Expected Loss = 0.25 x (25,000) = 6,250
The variance of the expected loss due to default on the portfolio of 5 loans is given by the formula:
Variance of Loss = Probability of Default x Variance of Loss per Loan
Variance of Loss = 0.25 x (5000)2 = 312,500
Therefore, the standard deviation of the expected loss due to default on the portfolio of 5 loans is given by the formula:
Standard Deviation of Loss = √Variance of Loss
Standard Deviation of Loss = √312,500 = 556.25
The expected loss due to default on the portfolio of 5 loans is 6,250, and the standard deviation of the expected loss is 556.25.
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Which equation is enough information to prove that lines m and n are parallel lines cut by transversal p? select three options. a = c a = d c = d b c = 180° b d = 180°
One of the alternatives isc=d because when a line meets two parallel lines, matching angles are created and the identical corners are congruent.
What are parallel lines?Coplanar, straight lines that don't intersect anywhere are considered parallel lines in geometry. Planes in the same three-dimensional space that never cross each other are said to be parallel. Curves that are parallel to one another and maintain a set minimum distance do not touch or intersect. Lines in a plane that consistently have the same separation are said to be parallel. Nothing can cross a parallel line. Lines that cross at a straight angle of 90 degrees are called perpendicular lines.
A = d is also a solution due to vertical angles. Finally, b+d=180 since b+c=180 and c=d, and b+d=180 as a result. The solution is therefore B,C,E, where a=d, c=d, and b+d=180.
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Hello, Can you help me with the following question:My family is planning to build a brick wall that approximates the shape of a trapezoid. The shorter base of the trapezoid needs to start with a row of 5 bricks, and each row must increase by 2 bricks on each side until there are 20 rows. How can I go about finding out how many bricks I will need to buy so that I don’t spend more money than needed?
In this problem, we have the sequence
5,9,13,17,21,...
Is an arithmetic sequence
the common difference is d=4
there are 20 terms (rows) in the sequence
Remember that
The rule to find the sum of the first n terms of the arithmetic sequence is equal to
\(S=\frac{n}{2} [2a_1+(n-1)d]\)where
n=20
a1=5 ----> first term
d=4
substitute given values
\(S=\frac{20}{2}[2(5)+(20-1)4]\)S=860
therefore
The answer is 860 bricksHELP HAVING A BAD DAY!!!!!!!!!!!!!!!! WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!
Answer:
-½ + (root2 / 2) i + root½ i
Step-by-step explanation:
\( \frac{a}{b} - \frac{c}{d} = \frac{ad - cb}{bd} \)
I used this formula to do it but let me know if it's enough or you have to simplify it further
Answer:
45
Step-by-step explanation:
What is the constant of proportionality between y and x in this graph?
Answer:
k = 2
Step-by-step explanation:
the equation representing direct proportion is
y = kx ← k is the constant of proportionality
divide both sides by x , then
k = \(\frac{y}{x}\)
using the point on the line (2, 4 )
k = \(\frac{4}{2}\) = 2
What is the measure of exterior angle B in the polygon?
B
(9x + 3)
(8x)
A
C(5x + 4)
OA. 93°
OB. 96°
O C. 116°
OD. 87°
(9x + 5)°
The value of Exterior Angle B in the polygon is equal to 102°.
What is Polygon?
A polygon is a two-dimensional closed object made up of line segments (not curves). Polygon is made up of two words: poly (which means numerous) and gon (which means shape) (means sides). A closed figure requires at least three line segments connected end to end.
We are given eith the exterior angles
∠A = 8x°
∠B = 9x + 3°
∠C = 5x + 4°
∠D = 9x + 5°
And using the property that sum of exterior angles of a polygon is 360°
We can find the value of x
8x + 9x + 3 + 5x + 4 + 9x +5 = 360
31x + 12 = 360
31x = 348
x = 11
∠B = 9*11 + 3° = 99 + 3 = 102°
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Construct a stem and leaf plot of the data. how does it suggest that the sample mean and median will compare
To construct a stem and leaf plot, you first need to separate each data point into a stem and a leaf. The stem represents the leading digit(s) of the data point, while the leaf represents the trailing digit(s).
Once you have organized the data in this way, you can create the plot. The stems are listed vertically, and the leaves are placed horizontally next to their corresponding stems. Make sure to arrange the leaves in ascending order.
Regarding how the stem and leaf plot suggests the sample mean and median will compare, we can look at the distribution of the data. If the leaves are evenly distributed across the stems, it suggests a symmetrical distribution. In this case, the sample mean and median will be similar.
However, if the leaves are concentrated in certain stems, it suggests an asymmetrical distribution. In this scenario, the sample mean and median may differ. The median tends to be less affected by extreme values, while the mean can be influenced by outliers.
Therefore, by examining the stem and leaf plot, you can get a sense of whether the sample mean and median will be similar or different based on the distribution of the data.
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Find the distance between the two points. (–5, –2) , (9, 2)
Using a local telephone book to select a simple random sample could introduce _____ bias.
Answer:
Undercoverage
Step-by-step explanation:
Using a local telephone book to select a simple random sample could introduce UNDERCOVERAGE bias.
I hope it helps! Have a great day!
Can somebody please helppppp !
What is the value of the expression x-3y when x=6 and y=12
Answer:
-30
Step-by-step explanation:
Original Equation:
x - 3y
Plug in the values.
6 - 36
-30
Hope I helped :)
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Question is in picture
Answer:
27.5ft
Step-by-step explanation:
a² + b² = c²
Plug in what you have:
a² + 12² = 30²
Get a by itself:
a² = 30² - 12²
Simplify:
a² = 900 - 144
Simplify:
a² = 756
Simplify:
√a = √756
Then you get 27.49 and when you round you get 27.5
Part (c) In words, state what your random variable X represents X represents the number of hours a woman works in a week X represents the number of women who work over 80 hours a week. X represents the average number of women who work over 80 hours a week. X represents the average number of hours women work in one week. Correct! The investigation involves the average number of hours that women work in a given week.
There is sufficient evidence to conclude that the average number of hours women work each week is more than 80 hours
The hypothesIs are
Ha : μ>80
Given the sample size n=68 and sample mean X 83 , sample standard deviation s=10
The test statistic is
t = x~ - 80/s/√n
t= 83-80/10/√68
t- 2.4738634
The P-value of the test is
P-value P(T> 2.4738634)
P-value 0.0080
When α=0.05,
Reject the null hypothesis since P-value 0.0080 a 0.05
i) The -a) 10090 two-sided confidence interval for mean based on the sample data is
{x}\pm t_{1-\α /2,n-1}\frac{s}/{√n}
Here the 95% confidence interval is
= 83 ± t1-0.05/2,67 10/V68
= (80.58,85.42)
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find the equation of the line that is perpendicular to y=3/4x-3 and passes through the point (3,-2)
Answer:
Step-by-step explanation:
perp. -4/3
y + 2 = -4/3(x - 3)
y + 2 = -4/3x + 4
y = -4/3x + 2
what is a congruent polygon
A congruent polygon refers to two or more polygons that have the same shape and size. There must be an equal number of sides between two polygons for them to be congruent.
Congruent polygons have parallel sides of equal length and parallel angles of similar magnitude. When two polygons are congruent, they can be superimposed on one another using translations, rotations, and reflections without affecting their appearance or dimensions. Concluding about the matching sides, shapes, angles, and other geometric properties of congruent polygons allows us to draw conclusions about them.
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