The improper integral ∫[tex][0, 1] x^{(-1)} dx[/tex] does not converge.
To rewrite the improper integral ∫[tex][0, 1] x^{(-1)[/tex] dx as a limit, we use the definition of improper integrals by taking the limit as the upper bound approaches a certain value:
∫[0, 1] [tex]x^{(-1)} dx[/tex] = lim [a→0+] ∫[a, 1] [tex]x^{(-1)} dx[/tex]
To determine if the integral converges or not, we need to evaluate the limit. If the limit exists and is a finite value, the integral converges; otherwise, it diverges.
Now, let's evaluate the integral by finding the antiderivative of [tex]x^{(-1)[/tex] with respect to x:
∫[tex]x^{(-1)} dx = ln|x|[/tex]
Applying the limit to the integral:
lim [a→0+] ∫[a, 1] [tex]x^{(-1)} dx[/tex] = lim [a→0+] ln|1| - ln|a|
= lim [a→0+] -ln|a|
Since the limit of -ln|a| as a approaches 0 does not exist (approaches negative infinity), the integral diverges.
Therefore, the improper integral ∫[0, 1] x^(-1) dx does not converge.
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Find a useful denial for "the real function is neither
decreasing nor increasing or it is unbounded"
A real function is unbounded when it is not limited from above or below by any number, which implies that the function is not increasing or decreasing. In other words, a function may be unbounded without necessarily being monotonic, which is why we use the term “neither decreasing nor increasing or it is unbounded.”
A common example of an unbounded function is f(x) = x², which increases rapidly without limit as x increases without bound.
In real analysis, unbounded functions are important because they can be used to prove important theorems. However, there are many circumstances when we want to deny that a function is increasing, decreasing, or unbounded, especially when the function is not well-behaved.
One useful denial for the real function “neither decreasing nor increasing or it is unbounded” is to say that the function has a finite limit at infinity. This means that the function approaches a finite value as the independent variable gets larger and larger. We can use this denial to prove important theorems about continuity, uniform convergence, and the existence of integrals and derivatives.
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Given the coordinates (2,-8) are on the graph of y = fx) what would the coordinates be after the following transformation? y= 1 f(3x-9) Answer: 1
After the transformation y = 1 f(3x-9), the coordinates (2, -8) would be transformed to (1, -8).
The given transformation is y = 1 f(3x-9), which means the original function f(x) is scaled vertically by a factor of 1 and horizontally compressed by a factor of 1/3.
To find the transformed coordinates, we substitute x = 2 into the transformation equation. We have y = 1 f(3(2)-9) = 1 f(6-9) = 1 f(-3). Since the value of f(-3) is not given, we cannot determine the exact y-coordinate. However, we know that the vertical scaling factor of 1 does not change the y-coordinate, so the y-coordinate remains -8.
As for the x-coordinate, the horizontal compression by a factor of 1/3 means that the transformation is three times as fast as the original function. Therefore, when x = 2 is transformed, the new x-coordinate is 2/3. Hence, the transformed coordinates are (2/3, -8), which can be simplified to (1, -8).
In summary, after the transformation y = 1 f(3x-9), the coordinates (2, -8) would be transformed to (1, -8), with the x-coordinate compressed by a factor of 1/3 and the y-coordinate unchanged.
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PLEASE I NEED THE CORRECT ANSWER AND I NEED EXPLANATION
PLEASE I NEED THE CORRECT ANSWER AND I NEED EXPLANATION
PLEASE I NEED THE CORRECT ANSWER AND I NEED EXPLANATION Considering the following Venn diagram, where R represents rain, W represents wind, and C represents cloud R C 0.03 0.12 0.05 0.01/ W 0.61 ?p(RUC) What is the probability to have both a rainy day and not having a cloud a ?p(CW) What is the probability to have a rainy day if there is a cloud b ?p(R/W) What is the probability to have a rainy day if there is a wind.c Note: show the calculations of each of the questions above 0.16 0.01 0.01
Answer:
Step-by-step explanation:
Expert Answer 100% (1 rating) Probability
for which intervals is the function positive
select each correct answer
The mass of solid waste deposited in Lift 1 at the end of its closure is 50,000 kg. A mass of 10000 kg of light silty loam soil with a moisture content of 20% is used to cover the waste in every lift. An additional lift of similar mass was deposited above the first lift at the end of the second year. Assume that the moisture content in the waste in any lift is 30%. What is the amount of water retained by the landfill waste only from lift 1 at the end of second year? a) 8572 kg b) 9110 kg c) 1070 kg d) 2632 kg
The amount of water retained by the landfill waste only from Lift 1 at the end of the second year is approximately 11,538.46 kg.
To calculate the amount of water retained by the landfill waste in Lift 1 at the end of the second year, we need to consider the moisture content and the mass of the waste.
In Lift 1, the mass of the solid waste deposited is 50,000 kg. The moisture content in the waste in Lift 1 is given as 30%.
To find the amount of water retained by the landfill waste in Lift 1, we first need to calculate the dry mass of the waste. The dry mass is the mass of the waste without considering the moisture content.
Dry Mass of Waste in Lift 1 = Mass of Waste in Lift 1 / (1 + Moisture Content)
Dry Mass of Waste in Lift 1 = 50,000 kg / (1 + 0.30)
Dry Mass of Waste in Lift 1 = 50,000 kg / 1.30
Dry Mass of Waste in Lift 1 ≈ 38,461.54 kg
Now, let's calculate the mass of water in the waste in Lift 1. We can find this by subtracting the dry mass from the total mass.
Mass of Water in Lift 1 = Mass of Waste in Lift 1 - Dry Mass of Waste in Lift 1
Mass of Water in Lift 1 = 50,000 kg - 38,461.54 kg
Mass of Water in Lift 1 ≈ 11,538.46 kg
Therefore, the amount of water retained by the landfill waste only from Lift 1 at the end of the second year is approximately 11,538.46 kg.
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"all please
If the following integral converges, state its value in the space provided. Otherwise, input divergent. .5 [1 21.3 dx
If the following integral converges, state its value in the space provided. Other"
The value of the integral is 0.832 and it converges. The value of the integral is 0.832 and it converges.
If the following integral converges, state its value in the space provided. The integral is ∫(0 to 1) 0.5/(1 + 21.3x) dx.
Let u = 21.3x + 1 and du = 21.3 dx.
Then, the integral can be rewritten as∫(1.0 to 2.3) 0.5/u du
The integral of 1/u is ln|u|, so∫(1.0 to 2.3) 0.5/u du = 0.5 ln|2.3| - 0.5 ln|1.0| = 0.5 ln(2.3) ≈ 0.832
Therefore, the value of the integral is 0.832 and it converges.
The value of the integral is 0.832 and it converges.
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1) Evaluate The Line Integral, Where C Is The Given Curve. ∫Cxyeyzdy,C:X=2t,Y=4t2,Z=4t3,0≤T≤1 /1 Points] SCALCET8 16.2.015.
The final expression for the line integral is:
∫C xyeyz dy = ∫[0,1] 2e^(4t^3) dt
To evaluate the line integral ∫C xyeyz dy, where C is the curve defined by x = 2t, y = 4t^2, z = 4t^3, and 0 ≤ t ≤ 1, we need to substitute the parameterization of the curve into the integrand and compute the integral.
First, let's find the expression for y in terms of t:
y = 4t^2
Next, let's substitute this expression into the integrand xyeyz:
xyeyz = (2t)(4t^2)e^(4t^3) = 8t^3e^(4t^3)
Now, we can set up the line integral:
∫C xyeyz dy = ∫[0,1] 8t^3e^(4t^3) dy
Since we are integrating with respect to y, we need to express dy in terms of t. Taking the derivative of y with respect to t:
dy/dt = 8t
Now, we can rewrite the line integral:
∫C xyeyz dy = ∫[0,1] 8t^3e^(4t^3) (dy/dt) dt
Substituting dy/dt = 8t and simplifying:
∫[0,1] 8t^4e^(4t^3) dt
Now, we can integrate with respect to t:
∫[0,1] 2e^(4t^3) dt
Unfortunately, this integral does not have a closed-form solution and cannot be evaluated analytically. However, you can approximate the value of the integral using numerical methods such as numerical integration techniques like Simpson's rule or by using computer software.
So, the final expression for the line integral is:
∫C xyeyz dy = ∫[0,1] 2e^(4t^3) dt
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show work. Solve each of the following questions graphically and check your solutions. Classify the systems as consistent or inconsistent and the equations as dependent or independent. 1.3x-y=-1 x+2y=2 2.y+4x=4 8x+2y=8 3.x-y=4 4x=4+4y 4.3y=12 x+5=0
The system of equations is:
Consistent, independent
Consistent, dependent
Inconsistent
Inconsistent
We have,
To solve each of the following questions graphically, we need to plot the equations on a graph and find the intersection points, if any. Let's solve each question step by step:
3x - y = -1
x + 2y = 2
Converting the equations to slope-intercept form:
y = 3x + 1
y = -0.5x + 1
Plotting the lines on a graph:
The lines intersect at the point (0.5, 2), which is the solution to the system of equations.
The system is consistent and independent.
y + 4x = 4
8x + 2y = 8
Converting the equations to slope-intercept form:
y = -4x + 4
y = -4x + 4
Plotting the lines on a graph:
The lines overlap and are the same equation.
The system is consistent and dependent.
x - y = 4
4x = 4 + 4y
Converting the equations to slope-intercept form:
y = x - 4
y = x - 1
Plotting the lines on a graph:
The lines are parallel and do not intersect.
The system is inconsistent.
3y = 12
x + 5 = 0
Converting the equations to slope-intercept form:
y = 4
x = -5
Plotting the lines on a graph:
The lines are parallel and do not intersect.
The system is inconsistent.
Thus,
The system of equations is:
Consistent, independent
Consistent, dependent
Inconsistent
Inconsistent
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Present the given data in a tabular form from the given situations below. Then, plot a two-line in a line graph based on the table you created.
Angelo and Angela are fraternal twins. They were trained by their parents to save money from
their weekly allowance Considerations:
1. Angela saves 10 pesos everyday in a week. (7days)
2. Angela saved twice as much in the 1" to 4 weeks and have the same with Angelo in the 5th
week
3. On the 6 week. Angelo saves twice as much Angela on a weekly basis. 4. Label the data presented on the X and Y axes and put a title.
5. Use graphing paper for your grid pasted on your bond paper. On your x axis, use 5 lines
interval each week.
6. The graph should be on a 0-500 scale in peso with 20 as interval in each line of the
graphing paper on the Y axis.
7. Use two colored pen to show the difference of the two lines and label each color on the lower right side of the graph.
Answer the following questions.
1. How much more does Angela saves in 1" to 4th weeks compared to Angelo? (Show your
solutions)
2. How much more did Angelo saved on the 6 week compared to Angela?
3. How much is the total savings of Angela in 6 weeks?
4. How much is the total savings of Angelo in 6 weeks?
5. Who saved more? by how much?
1. Angela saves 10 pesos more than Angelo in the 1st to 4th weeks.
2. Angelo saved twice as much as Angela in the 6th week.
3. The total savings of Angela in 6 weeks is 360 pesos.
4. The total savings of Angelo in 6 weeks is 210 pesos.
5. Angela saved more by as much as 150 pesos.
How do you create a table showing Angela's Savings and Angelo's Savings?The table showing Angela's Savings and Angelo's savings is created as shown in the attached image.
Angela saves 10 pesos more than Angelo in the 1st to 4th weeks. (Angela's savings - Angelo's savings = 20 - 10 = 10 pesos)
Angelo saved twice as much as Angela in the 6th week. (Angelo's savings - Angela's savings = 60 - 120 = -60 pesos)
The total savings of Angela in 6 weeks is 360 pesos. (20 + 40 + 60 + 80 + 100 + 120 = 360 pesos)
The total savings of Angelo in 6 weeks is 210 pesos. (10 + 20 + 30 + 40 + 50 + 60 = 210 pesos)
Angela saved more than Angelo by 150 pesos. (360 - 210 = 150 pesos)
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Work Problem [60 points]: Write step by step solutions and justify your answers. 1) [20 Points] Consider the DE dy = 4x²y + 5xy dx A) Solve the given differential equation by separation of variables. B) Find a solution that satisfies the initial condition y(1) = 1 2) [20 Points] Consider the linear DE: 3xy' - 9y = 6x³ A) Find an explicit solution of the given DE, and explain the largest interval where this solution exists. B) Find a solution that satisfies the initial condition y(1) = 1 3) [20 Points] Consider the DE: (6xy + 3x²)dx - (2y² - 3x²)dy = 0 A) Verify that the DE is exact. B) Solve the given DE.
1: (A) The general solution is, ln|y| = (4/3)x³ + (5/2)x² + C
(B) y = exp(4x³/3 + 5x²/2 - 11/6)
2: (A)y = (2/x³)ln|x| + C1/x³
(B) y = (2/x³)ln|x| + 1/x³
3: (A) it is exact
(B) f(y) = g(x) - 3x²y + C
1) The given differential equation is:
dy /dx = 4x²y+5xy
A) To solve the differential equation dy/dx = 4x²y + 5xy,
we can use the separation of variables.
First, let's write the equation as dy/y = (4x² + 5x) dx.
Next, we integrate both sides with respect to their respective variables.
∫ dy/y = ∫ (4x² + 5x) dx
ln|y| = (4/3)x³ + (5/2)x² + C
where C is the constant of integration.
B) To find a solution that satisfies the initial condition y(1) = 1, we can use the initial condition to solve for C.
ln|1| = (4/3)(1)³ + (5/2)(1)² + C
0 = 11/6 + C
C = -11/6
Therefore, the solution to the differential equation that satisfies the initial condition y(1) = 1 is:
ln|y| = (4/3)x³ + (5/2)x² - 11/6
We can write this in exponential form as:
y = exp(4x³/3 + 5x²/2 - 11/6)
2) A) To find an explicit solution of the given DE,
we first need to rearrange the equation to isolate y'. Dividing both sides by 3x, we get:
y' - 3/y = 2x²
This is now in the form of a first-order linear differential equation: y' + p(x)y = q(x),
Where p(x) = -3/x and q(x) = 2x^2.
To solve this equation, we first find the integrating factor, which is given by:
μ(x) = exp∫p(x)dx
= exp∫(-3/x)dx
= exp(-3ln|x|) = 1/x³
Multiplying both sides of the equation by μ(x), we get:
(1/x³)y' - (3/x⁴)y = 2x²/x³
Now, we can apply the product rule and simplify to get:
d/dx [(1/x³)y] = 2/x
Integrating both sides with respect to x, we get:
(1/x³)y = 2ln|x| + C1
where C1 is the constant of integration. Solving for y, we get:
y = (2/x³)ln|x| + C1/x³
This is the explicit solution of the given DE.
The largest interval where this solution exists is from -∞ to 0 and from 0 to +∞, excluding x = 0, since the solution is not defined at x = 0 due to the presence of the term 1/x³.
B) To find a solution that satisfies the initial condition y(1) = 1, we first plug in x = 1 and y = 1 into the general solution and solve for C1:
1 = (2/1^³)ln|1| + C1/1³
1 = 0 + C1
C1 = 1
So the particular solution that satisfies the initial condition is:
y = (2/x³)ln|x| + 1/x³
3) To verify if the differential equation (DE) is exact,
We need to check if its partial derivatives with respect to x and y are equal.
Taking the partial derivative of the first term with respect to y,
We get 6x.
Taking the partial derivative of the second term with respect to x,
We get -6x.
Since these partial derivatives are opposite in sign, we can conclude that the DE is exact.
Now, for part B, to solve the exact DE, we need to find the potential function by integrating the first term with respect to x and the second term with respect to y.
Integrating the first term with respect to x,
We get 3x²y + f(y),
Where f(y) is a constant of integration.
Integrating the second term with respect to y, we get -2/3 y³ + g(x), where g(x) is another constant of integration.
Now, we need to check if these two potential functions are equal.
Taking the partial derivative of 3x²y + f(y) with respect to y,
we get 3x² + f'(y).
Taking the partial derivative of -2/3 y³ + g(x) with respect to x,
we get g'(x).
Since the DE is exact,
We know that these partial derivatives are equal, so we set them equal to each other:
3x² + f'(y) = g'(x)
We can solve for f(y) by integrating both sides with respect to y:
f(y) = ∫g'(x)dy - 3x²y + C
where C is the constant of integration.
We can simplify this by noting that the integral of g'(x) with respect to y is just g(x), so we get:
f(y) = g(x) - 3x²y + C
This is the general solution to the given DE.
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Find the absolute minimum value of f on the given interval. f(x)=19+4x−x 2
,[0,5]. 19 14 5 23 13
Comparing these values, we see that the absolute minimum value of f(x) on the interval [0, 5] is 14.
To find the absolute minimum value of the function f(x) = 19 + 4x - x^2 on the interval [0, 5], we need to evaluate the function at the critical points and endpoints within the interval.
First, let's find the critical points by taking the derivative of f(x) and setting it equal to zero:
f'(x) = 4 - 2x
Setting f'(x) = 0, we have:
4 - 2x = 0
2x = 4
x = 2
So, the critical point within the interval [0, 5] is x = 2.
Now, let's evaluate the function at the critical point and endpoints:
[tex]f(0) = 19 + 4(0) - (0)^2 = 19\\f(2) = 19 + 4(2) - (2)^2 = 23\\f(5) = 19 + 4(5) - (5)^2 = 14\\[/tex]
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The volume of an open cylindrical tank is 100 m 3
. Given that r is the radius of the circular base and h is the height of the tank. i) Show that the total surface area of the tank is given by A=πr 2
+ r
200
. ii) Find the value of r and h that will minimize the total surface area of the tank.
After considering the given data we conclude that the answers to the given sub questions are
i) the total surface area of the cylindrical tank is given by [tex]A = \pi r^2 + r200.[/tex]
ii) the value of r that minimizes the total surface area of the tank is [tex](100/\pi )^{(1/3)}[/tex] and the corresponding value of h is also [tex](100/\pi)^{(1/3)}[/tex].
i) To show that the total surface area of the cylindrical tank is given by [tex]A = \pir^2 + r200[/tex], we need to find the surface area of the cylindrical tank.
The surface area of a cylinder is given by [tex]A = 2\pi rh + 2\pi r^2[/tex], where r is the radius of the circular base and h is the height of the cylinder.
Since we are given that the volume of the cylindrical tank is 100 m^3, we know that [tex]\pi r^2h = 100.[/tex]
Solving for h, we get [tex]h = 100/(\pi r^2).[/tex]
Substituting this value of h into the surface area formula, we get:
[tex]A = 2\pi r(100/(\pi r^2)) + 2\pi r^2[/tex]
A = 200/r + 2πr^2
Simplifying this expression, we get:
[tex]A = \pi r^2 + r200[/tex]
Therefore, the total surface area of the cylindrical tank is given by [tex]A = \pi r^2 + r200.[/tex]
ii) To find the value of r and h that will minimize the total surface area of the tank, we need to take the derivative of A with respect to r and set it equal to zero.
Taking the derivative of A with respect to r, we get:
[tex]dA/dr = 2\pi r - 200/r^2[/tex]
Setting this expression equal to zero, we get:
[tex]2\pi r - 200/r^2 = 0[/tex]
[tex]2\pi r^3 - 200 = 0[/tex]
[tex]r^3 = 100/\pi[/tex]
[tex]r = (100/\pi )^{(1/3)}[/tex]
Substituting this value of r into the expression for h, we get:
[tex]h = 100/(\pi ((100/\pi )^}{(2/3)} ))[/tex]
[tex]h = (100/\pi )^{(1/3)}[/tex]
Therefore, the value of r that minimizes the total surface area of the tank is [tex](100/\pi )^{(1/3)}[/tex] and the corresponding value of h is also [tex](100/\pi )^{(1/3)}[/tex].
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For the following right triangle, find the side length x. x 6 8
The measure of side length x of the right triangle is 10 units.
What is the value of side length x?Pythagorean theorem states that the "square on the hypotenuse of a right-angled triangle is equal in area to the sum of the squares on the other two sides.
It is expressed as;
c² = a² + b²
From the diagram:
Hypotenuse = c = x
Leg1 = a = 8
Leg2 = b = 6
Plug these values into the above formula and solve for x:
x² = 8² + 6²
x² = 64 + 36
x² = 100
Take the square root ( using only positive value, since we are dealing with dimensions)
x = +√100
x = 10
Therefore, the value of x is 10.
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Find the exact value of the indicated trigonometric function of θ. 17) secθ=5/2,θ in quadrant IV Find tanθ A) −√21/2 B) -√21/5 C) -5/2 D) -√21
The value of tangent using the relationship between sine and cosine:
tan(θ) = sin(θ)/cos(θ) = (√21/5)/(2/5) = -√21/2
Therefore, the exact value of tan(θ) is A) -√21/2.
Given that sec(θ) = 5/2 and θ is in quadrant IV, we can use the relationship between secant and cosine to find the value of cosine.
Recall that sec(θ) is the reciprocal of cosine, so we have:
sec(θ) = 1/cos(θ) = 5/2
Cross-multiplying, we get:
2 = 5cos(θ)
Dividing both sides by 5, we find:
cos(θ) = 2/5
Since θ is in quadrant IV, cosine is positive.
Now, we can use the Pythagorean identity to find the value of sine:
sin^2(θ) = 1 - cos^2(θ)
sin^2(θ) = 1 - (2/5)^2
sin^2(θ) = 1 - 4/25
sin^2(θ) = 21/25
Taking the square root of both sides, we get:
sin(θ) = √(21/25) = √21/5
Finally, we can find the value of tangent using the relationship between sine and cosine:
tan(θ) = sin(θ)/cos(θ) = (√21/5)/(2/5) = -√21/2
Therefore, the exact value of tan(θ) is A) -√21/2.
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Find the derivatives of the following functions: (a) f(x) = 2√x+3x³ (b) g(x) = (x² + 1)(3x + 2) .x (c) p(x) = x² +1 2. Find the tangent line to the graph of y = 2³ +1 X at the point (1, 2).
[tex](a) Differentiating the given function using the chain rule, we have;f(x) = 2√x + 3x³f'(x) = 2(1/2)(x)^(-1/2) + 9x² [Power rule]f'(x) = x^(-1/2) + 9x²[/tex]
(b) Differentiating the given function using the product rule,[tex]we have;g(x) = (x² + 1)(3x + 2).xg'(x) = (3x + 2)(2x) + (x² + 1)(3) [Product rule]g'(x) = 6x² + 4x + 3x² + 3g'(x) = 9x² + 4x[/tex]
(c) Differentiating the given function using the power rule, [tex]we have;p(x) = x² + 1p'(x) = 2x2.[/tex]
Find the tangent line to the graph of y = 2³ +1 X at the point (1, 2).
To find the tangent line to the graph of y = 2³ +1 X at the point (1, 2), we have to find the derivative of the function first.
[tex]f(x) = 2³ +1 Xf'(x) = 3(2)x²f'(x) = 6x²At point (1, 2); f(1) = 2³ +1 X = 2(1)³ +1(1) = 3[/tex]
Therefore, the slope of the tangent line is 6(1)² = 6
The equation of a line passing through the point (1, 2) with slope 6 can be found using the point-slope formula:y - y1 = m(x - x1)y - 2 = 6(x - 1)y - 2 = 6x - 6y = 6x - 8
Thus, the equation of the tangent line to the graph of y = 2³ +1 X at the point (1, 2) is y = 6x - 8.
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Use The Properties Of Definite Integrals To Find ∫69f(X)Dx For The Following Function. F(X)={4x+1−0.5x+7 If X≤8 If X>8 ∫69f(X)Dx=
Solving the given function gives the result ∫69f(x)dx = ∫0^8 (4x + 1)dx + ∫8^9 (-0.5x + 7)dx.
To evaluate the definite integral ∫69f(x)dx, we need to consider the different intervals where the function f(x) is defined.
For x ≤ 8, the function is given as f(x) = 4x + 1. So, the integral over this interval becomes ∫0^8 (4x + 1)dx.
For x > 8, the function is given as f(x) = -0.5x + 7. So, the integral over this interval becomes ∫8^9 (-0.5x + 7)dx.
Now, we can calculate each integral separately.
∫0^8 (4x + 1)dx = 2x^2 + x | from 0 to 8 = 2(8)^2 + 8 - 2(0)^2 - 0 = 128 + 8 = 136.
∫8^9 (-0.5x + 7)dx = -0.25x^2 + 7x | from 8 to 9 = -0.25(9)^2 + 7(9) - (-0.25(8)^2 + 7(8)) = -20.25 + 63 - (-16 + 56) = 16.
Therefore, ∫69f(x)dx = ∫0^8 (4x + 1)dx + ∫8^9 (-0.5x + 7)dx = 136 + 16 = 152.
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\( \lim _{(x, y) \rightarrow(0,0)} \frac{3 x^{2} y^{2}}{2 x^{4}+y^{4}} \)
The value of limit (x,y) tends to (0,0) of x²y²/(x⁴ + 3y⁴) = 0.
Write the expression in terms of polar coordinates,
This gives us,
r⁴ cos²(θ) sin²(θ) / (r⁴ cos⁴(θ) + 3r⁴ sin⁴(θ))
We can simplify this expression by dividing out r⁴ from both the numerator and denominator:
cos²(θ) sin²(θ) / (r⁴ cos⁴(θ) + 3r⁴ sin⁴(θ))
Now we need to find a delta that corresponds to an epsilon value.
Choose an arbitrary epsilon value of epsilon > 0.
We can start by setting delta =√(∈)/2.
We need to show that whenever 0 < √(x² + y²) < δ,
Then the expression |x²y² / (x⁴ + 3y⁴)| < ∈.
We can start by assuming that 0 < √(x² + y²) < δ.
Then we have,
|x²y² / (x⁴ + 3y⁴)| = r⁴ cos²(θ) sin²(θ) / (r⁴ cos⁴(θ) + 3r⁴sin⁴(θ))
Since r = √(x² + y²) < δ, we have:
r < √(∈) / 2
So we can write,
r⁴cos²(θ) sin²(θ) / (r⁴ cos⁴(θ) + 3r⁴ sin⁴(θ)) < r⁴ cos²(θ) sin²(θ) / (r⁴ cos⁴(θ))
Simplifying this expression gives,
r⁴cos²(θ) sin²(θ) / (r⁴ cos⁴(θ)) < 1
Now we can use the fact that cos²(θ) and sin²(θ) are both less than or equal to 1 to get,
r⁴cos²(θ) sin²(θ) / (r⁴ cos⁴(θ)) < r⁴ / r⁴ = 1
So we have shown that:
|x²y² / (x⁴ + 3y⁴)| < 1
Since we want to show that this expression is less than epsilon,
We can choose epsilon = 1.
Then we have,
|x²y² / (x⁴ + 3y⁴)| < ∈
Therefore,
We have shown that for any ∈ > 0, there exists a δ > 0 such that whenever 0 < √(x² + y²) < δ, we have,
|x²y² / (x⁴ + 3y⁴)| < ∈
And so we can conclude that the limit of the expression as (x, y) approaches (0, 0) is 0.
Hence,
limit (x,y) tends to (0,0) of x²y²/(x⁴ + 3y⁴) = 0.
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The complete question is:
Evaluate the value of limit (x,y) tends to (0,0) of x²y²/(x⁴ + 3y⁴).
One-sample t-test questions Consider a new drug that is being studied to alter red blood cell (RBC) counts in individuals. The mean number of RBC in normal individuals is 5 million cells per microliter (cells/mcL). A trial study was performed in which some volunteers took the drug and had their RBC numbers counted. The data is: 5218000 4999000 4784000 5192000 4995000 4865000 5153000 5111000 5075000 5195000 5135000 5178000 4988000 5061000 5015000 5230000
1a. What is the sample mean? (provide value to nearest 0.1)
1b. What is the sample standard deviation? (provide value to nearest 0.1)
1c. What is the sample standard error? (provide value to nearest 0.1)
1d. Conduct a two-tailed t-test of this data.
1e. What is tcalc? (provide value to nearest 0.001)
1f. What is tcrit for significance at the p<0.05 level? (provide value to nearest 0.001)
1g. Is the mean RBC value of the volunteers different than expected and, if so, how?
What is your conclusion and with what degree of confidence can you make your conclusion? Your choices will be:
a. The mean number of RBC in the volunteer population is significantly higher than 5 million ( 0.1 < p )
b. The mean number of RBC in the volunteer population is significantly higher than 5 million ( 0.05 < p < 0.1)
c. The mean number of RBC in the volunteer population is significantly higher than 5 million ( 0.02 < p < 0.05 )
d. The mean number of RBC in the volunteer population is significantly higher than 5 million ( 0.01 < p < 0.02 )
e. The mean number of RBC in the volunteer population is significantly higher than 5 million ( 0.005 < p < 0.01 )
f. The mean number of RBC in the volunteer population is significantly higher than 5 million ( p < 0.005 )
g. The mean number of RBC in the volunteer population is not significantly different from 5 million ( 0.1 < p )
h. The mean number of RBC in the volunteer population is not significantly different from 5 million ( 0.05 < p < 0.1)
i. The mean number of RBC in the volunteer population is not significantly different from 5 million ( 0.02 < p < 0.05 )
j. The mean number of RBC in the volunteer population is not significantly different from 5 million ( 0.01 < p < 0.02 )
k. The mean number of RBC in the volunteer population is not significantly different from 5 million ( 0.005 < p < 0.01 )
l. The mean number of RBC in the volunteer population is not significantly different from 5 million ( p < 0.005 )
1a. Sample mean: 5085250 (rounded to nearest 0.1)
1b. Sample standard deviation: 126442.3 (rounded to nearest 0.1)
1c. Sample standard error: 33489.8 (rounded to nearest 0.1)
1d. Conduct a two-tailed t-test of the data.
1e. tcalc: 2.067 (rounded to nearest 0.001)
1f. tcrit for significance at the p<0.05 level: ±2.131 (rounded to nearest 0.001)
1g. The mean RBC value of the volunteers is significantly different from the expected value of 5 million, and the p-value falls between 0.02 and 0.05.
1h. Conclusion: The mean number of RBC in the volunteer population is significantly higher than 5 million (0.02 < p < 0.05).
1a. The sample mean is calculated by summing up all the RBC values and dividing by the total number of observations, which in this case is 5085250.
1b. The sample standard deviation measures the variability or dispersion of the data points around the sample mean. It is computed using the formula for sample standard deviation and results in a value of 126442.3.
1c. The sample standard error represents the standard deviation of the sample mean and is calculated by dividing the sample standard deviation by the square root of the sample size. The resulting value is 33489.8.
1d. To conduct a two-tailed t-test, we compare the sample mean to the expected population mean (5 million) while considering the variability in the data. This test helps determine if the observed difference is statistically significant.
1e. tcalc is calculated by dividing the difference between the sample mean and the population mean (5 million) by the sample standard error. In this case, tcalc is approximately 2.067.
1f. tcrit represents the critical t-value for a specific level of significance (in this case, p < 0.05) and the degrees of freedom. The critical t-value for a two-tailed test at the p < 0.05 level is ±2.131.
1g. By comparing tcalc to tcrit, we can determine if the mean RBC value of the volunteers is significantly different from the expected value of 5 million. Since tcalc (2.067) falls within the range of -2.131 to 2.131, we can conclude that the mean RBC value is significantly different from 5 million.
1h. Based on the p-value falling between 0.02 and 0.05, we conclude that the mean number of RBC in the volunteer population is significantly higher than 5 million (0.02 < p < 0.05). The significance level of 0.05 indicates a moderate degree of confidence in this conclusion.
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ZILLDIFFEQMODAP11 7.2.017. Use appropriate algebra and Theorem 7.2.1 to find the given inverse Laplace transform. (Write your answer as a function of t.) L−1{s2+4s1}
The inverse Laplace transform of s²+4s/(s+1) is 3 - 2e⁽⁻ᵗ⁾.
To find the inverse Laplace transform of L−1{s²+4s/(s+1)}, we can use the linearity property of the Laplace transform and partial fraction decomposition.
Rewrite the expression as s²/(s+1) + 4s/(s+1).
Perform partial fraction decomposition for each term:
s²/(s+1) = (s+1) - 1/(s+1)
4s/(s+1) = 4 - 4/(s+1)
Apply the linearity property of the Laplace transform:
L−1{s²+4s/(s+1)} = L−1{(s+1) - 1/(s+1) + 4 - 4/(s+1)}
Take the inverse Laplace transform of each term individually:
L−1{s+1} = e⁽⁻ᵗ⁾ - 1
L−1{1/(s+1)} = e⁽⁻ᵗ⁾
L−1{4} = 4
L−1{4/(s+1)} = 4e⁽⁻ᵗ⁾
Combine all the terms to get the final result:
L−1{s²+4s/(s+1)} = e⁽⁻ᵗ⁾ - 1 - e⁽⁻ᵗ⁾ + 4 - 4e⁽⁻ᵗ⁾
Simplify the expression to obtain the inverse Laplace transform:
L−1{s²+4s/(s+1)} = 3 - 2e⁽⁻ᵗ⁾
Therefore, the inverse Laplace transform of s²+4s/(s+1) is given by the function 3 - 2e⁽⁻ᵗ⁾.
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1 Find the slope of the line through (3,−5) and (−2,4). a) − 5/9
b) −9/5
c) −1
d) 1 2 Find the equation of the line through (1,−2) with slope 5
a)y= 5x - 2
b)y= 5x - 7
c)y= 5x + 2
d)y = 5x+7
1. Slope of the line through (3,-5) and (-2,4)To find the slope of the line through two points we need to use the formula of slope,m = (y2 - y1) / (x2 - x1)Therefore, putting the coordinates into the formula:m = (4 - (-5)) / (-2 - 3)Simplifying the equation,m = 9 / (-5)Or,m = -9 / 5
Hence, the slope of the line is -9/5.2. Equation of the line through (1,-2) with slope 5To find the equation of the line through a point with a given slope, we use the point-slope form of a linear equation: y - y1 = m(x - x1)Given point (1, -2) and slope = 5m = 5, x1 = 1 and y1 = -2Therefore, substituting values in the formula, we have:y - (-2) = 5(x - 1)y + 2 = 5x - 5y = 5x - 7Therefore, the equation of the line through (1,-2) with slope 5 is y = 5x - 7.In more than 100 words:We first find the slope of the line through the points (3, -5) and (-2, 4).
The formula for slope is:m = (y2 - y1) / (x2 - x1)Substituting the coordinates of the points in the formula, we get:m = (4 - (-5)) / (-2 - 3)Simplifying,m = 9 / (-5) = -9/5Thus, the slope of the line through (3, -5) and (-2, 4) is -9/5.To find the equation of the line through (1, -2) with slope 5, we use the point-slope form of a linear equation, which is:y - y1 = m(x - x1)Here, m = 5, x1 = 1 and y1 = -2. Substituting the values in the formula, we get:y - (-2) = 5(x - 1)y + 2 = 5x - 5y = 5x - 7Therefore, the equation of the line is y = 5x - 7.
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Use the Midpoint Rule with n=6 to approximate ∫ 281+x 21dx 1.03255 0.33305 0.11124 0.51532 1.41234
The midpoint rule is used for the approximation of the definite integral. It's a rectangular approximation to the area under a curve. The Midpoint Rule with n = 6 approximates
∫(281 + x) 21dx as 406.
To find out the value of the definite integral, add up the areas of each rectangle.
The midpoint rule states that the height of each rectangle should be determined by evaluating the function at the midpoint of the interval, while the width of each rectangle should be determined by the size of the interval.
The sum of the areas of the rectangles gives a rough approximation of the area beneath the curve.
Now, we'll use the Midpoint Rule with
n = 6 to approximate
∫(281 + x) 21dx.
Let's start by calculating the width of each rectangle, which is Δx.
The interval is
[1.03255, 1.41234],
and the number of subintervals is 6.
Δx = (1.41234 - 1.03255) / 6
= 0.063163
Let xi be the midpoint of the ith subinterval. Then,
x1 = 1.06389,
x2 = 1.12705,
x3 = 1.19021,
x4 = 1.25337,
x5 = 1.31653, and
x6 = 1.37969.
The height of each rectangle is f(xi), where
f(x) = 21(281 + x).
So, we have
f(x1) = f(1.06389)
= 5905.86
f(x2) = f(1.12705)
= 6045.09
f(x3) = f(1.19021)
= 6184.32
f(x4) = f(1.25337)
= 6323.55
f(x5) = f(1.31653)
= 6462.78
f(x6) = f(1.37969)
= 6602.01
Using the midpoint rule, we can approximate the integral as follows
:∫(281 + x) 21dx
≈ Δx[f(x1) + f(x2) + f(x3) + f(x4) + f(x5) + f(x6)]
≈ 0.063163[5905.86 + 6045.09 + 6184.32 + 6323.55 + 6462.78 + 6602.01]
≈ 405.564, which we can round to 406.
Therefore, the Midpoint Rule with n = 6 approximates ∫(281 + x) 21dx as 406.
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A tank holds 5,000,000 gallons of water. If the total chlorine concentration in the tank is 5 mg/L, calculate the pounds of chlorine in the tank. 25. The water is leaving a treatment plant has a free chlorine residual of 0.5 mg/L. If the flow is 15 MGD, calculate the pounds of chlorine residual leaving the plant each day.
To calculate the pounds of chlorine in the tank, we need to convert the volume of water and the concentration of chlorine to pounds.
Given:
Volume of water in the tank = 5,000,000 gallons
Chlorine concentration in the tank = 5 mg/L
To convert gallons to pounds, we need to know the density of water. Since the density of water is approximately 8.34 pounds per gallon, we can multiply the volume of water by the density:
Weight of water in the tank = 5,000,000 gallons * 8.34 pounds/gallon
Now, to find the pounds of chlorine in the tank, we multiply the weight of water by the concentration of chlorine:
Pounds of chlorine in the tank = Weight of water in the tank * Chlorine concentration
Pounds of chlorine in the tank = (5,000,000 gallons * 8.34 pounds/gallon) * 5 mg/L
Now we can calculate the pounds of chlorine in the tank using these values.
To calculate the pounds of chlorine residual leaving the plant each day, we need to consider the flow rate and the chlorine residual concentration.
Given:
Flow rate = 15 MGD (million gallons per day)
Chlorine residual concentration = 0.5 mg/L
To convert million gallons to pounds, we use the same density of water:
Pounds of water leaving the plant = Flow rate * 8.34 pounds/gallon
To calculate the pounds of chlorine residual leaving the plant each day, we multiply the pounds of water leaving the plant by the chlorine residual concentration:
Pounds of chlorine residual leaving the plant = Pounds of water leaving the plant * Chlorine residual concentration
Pounds of chlorine residual leaving the plant = (Flow rate * 8.34 pounds/gallon) * 0.5 mg/L
Now we can calculate the pounds of chlorine residual leaving the plant each day using these values.
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Given below is the pmf of the random variable \( X \). What is the moment generating funciton of \( X \) ? \[ f(x)=\left\{\begin{array}{ll} \frac{1}{3}, & \text { if } x \in\{1,2\} \\ \frac{1}{6}, & \text { if } x \in\{3,4\} \\\"Now, Using the MGF found, calculate the variance of X
The variance of X is 9/2.
The moment generating function (MGF) of a random variable X is defined as the expected value of e^(tX), where t is a parameter:
MGF(t) = E(e^(tX))
To find the MGF of X using the given probability mass function (pmf), we can calculate the expected value of e^(tX) for each possible value of X and weight it according to the pmf.
Let's calculate the MGF for each value of X and use the given pmf to compute the expected value:
MGF(t) = E(e^(tX)) = ∑(x in support of X) e^(tx) * f(x)
For X = 1:
MGF(t) = e^(t*1) * (1/3) = e^t/3
For X = 2:
MGF(t) = e^(t*2) * (1/3) = e^(2t)/3
For X = 3:
MGF(t) = e^(t*3) * (1/6) = e^(3t)/6
For X = 4:
MGF(t) = e^(t*4) * (1/6) = e^(4t)/6
To obtain the overall MGF, we sum up the contributions from each value of X:
MGF(t) = e^t/3 + e^(2t)/3 + e^(3t)/6 + e^(4t)/6
Now that we have the MGF of X, we can calculate the variance using the MGF.
Variance of X = MGF''(0)
To find the second derivative of the MGF, we differentiate it twice with respect to t:
MGF'(t) = (1/3)e^t + (2/3)e^(2t) + (1/2)e^(3t) + (2/3)e^(4t)
MGF''(t) = (1/3)e^t + (4/3)e^(2t) + (3/2)e^(3t) + (8/3)e^(4t)
Substituting t = 0 into MGF''(t), we can calculate the variance:
Variance of X = MGF''(0) = (1/3)e^0 + (4/3)e^0 + (3/2)e^0 + (8/3)e^0
= 1/3 + 4/3 + 3/2 + 8/3
= 3/2 + 8/3
= 9/2
Therefore, the variance of X is 9/2.
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Consider the Hanning filter. This is a weighted moving average. a. Find the variance of the weighted moving average for the Hanning filter. Is this variance smaller than the variance of a simple span-3 moving average with equal weights?
Yes, the variance of the Hanning filter is less than or equal to the variance of a simple span-3 moving average with equal weights.
for a weighted moving average, the variance can be given as:
[tex]\sigma^2=\frac{1}{n}\sum_{i=1}^n w_i^2\sigma_0^2[/tex]
Where, [tex]\sigma_0^2[/tex] is the variance of the original data. The weights for Hanning filter is given by:
[tex]w_i=\frac{1}{2}(1-\cos(\frac{2\pi(i-1)}{n-1}))[/tex]
[tex]\begin{aligned}\sigma_H^2&=\frac{1}{n}\sum_{i=1}^n w_i^2\sigma_0^2\\&=\frac{1}{n}\sum_{i=1}^n\left[\frac{1}{2}(1-\cos(\frac{2\pi(i-1)}{n-1}))\right]^2\sigma_0^2\end{aligned}[/tex]
For a span-3 moving average with equal weights, the variance of the weighted moving average is given by:
[tex]\sigma_{S}^2=\frac{1}{3}\sigma_0^2[/tex]
To see if the variance of the Hanning filter is smaller than the variance of a simple span-3 moving average with equal weights, compare both expressions of variance.
[tex]\frac{\sigma_H^2}{\sigma_0^2}=\frac{1}{n\sigma_0^2}\sum_{i=1}^n\left[\frac{1}{2}(1-\cos(\frac{2\pi(i-1)}{n-1}))\right]^2\leq \frac{1}{3}[/tex]
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Evaluate the following integral using trigonometric substitution. 5x dx S- (36+x²)² S 5x² dx 5-0 (36+x²)
The main answer is:∫ 5x / (36+x²)² dx = 5x/648 + 36/x³ + C.
Given Integral is∫ 5x / (36+x²)² dx
To evaluate the given integral, use the trigonometric substitution where 36 + x² = 6² sec² θ
To find the derivative of x, we need to find x dx. So, differentiate the given equation to x.
36 + x² = 6² sec² θ2x
dx = 6²sec²θ. tan θ sec θ dx
xdx = 36 sec θ. dθ/2
The integral is difficult to evaluate since the denominator consists of a square of 36 + x².
Now substitute
6 tan θ = xdx
= 6 sec² θ dθ/2∫ 5x / (36+x²)² dx
= ∫ (5*6 sec²θ dθ/2) / (6² sec²θ)²
= ∫ 5 / (36) cos^4θ dθ= 5/36 ∫ (sec^4θ - 2 sec^2θ + 1) dθ
= 5/36 ( tanθ + (1/3) sec^3θ + C)
Now substitute the value of θ from the substitution
6 tan θ = xθ = tan⁻¹ (x/6)Putting all the values in the above equation, we get;
5/36 ( tanθ + (1/3) sec³θ + C)= 5/36 [tan(tan⁻¹ (x/6)) + (1/3) sec³(tan⁻¹ (x/6)) + C]= 5/36 [ x/6 + (1/3) (6/x)^3 + C]= 5x/648 + 36/x³ + C. Therefore, the answer is: ∫ 5x / (36+x²)² dx = 5x/648 + 36/x³ + C.
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Solve the following logarithmic equation. log6(3x)=2 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution set is (Simplify your answer. Type an exact answer. Use a comma to separate answers as needed.) B. There is no solution.
The correct choice is A. The solution to the logarithmic equation \(\log_6(3x) = 2\) is \(x = 12\).
To solve the logarithmic equation \(\log_6(3x) = 2\), we can use the definition of logarithms to rewrite the equation in exponential form.
The logarithmic equation \(\log_b(x) = y\) is equivalent to \(b^y = x\).
Applying this to the given equation, we have \(6^2 = 3x\).
Simplifying, we get \(36 = 3x\).
Dividing both sides by 3, we find \(x = 12\).
Therefore, the solution to the logarithmic equation \(\log_6(3x) = 2\) is \(x = 12\).
The correct choice is A. The solution set is \(x = 12\).
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If you toss a coin whose probability of Heads is 0.3, 100
times, what is the
expected number of Heads? What is the standard
deviation?
If you toss a coin whose probability of Heads is 0.3, 100 times, the expected number of heads and standard deviation can be calculated as follows:
The probability of getting a head when tossing a coin is p = 0.3The probability of getting a tail is q = 1 - p = 1 - 0.3 = 0.7The total number of coin tosses is n = 100 The expected number of heads is given by:
E(X) = np = 100 x 0.3 = 30
Therefore, the expected number of heads is 30. The standard deviation is given by:
σ = sqrt(npq) = sqrt(100 x 0.3 x 0.7) = sqrt(21) ≈ 4.58
Therefore, the standard deviation is approximately 4.58.
Note: The formula for the standard deviation of a binomial distribution is σ = sqrt(npq), where n is the total number of trials, p is the probability of success, and q is the probability of failure.
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5
A trapezium has an area of 36 cm². The two parallel sides are 3 cm and 6 cm.
Find the distance between the two parallel sides.
The distance between the two parallel sides of the trapezium is 8 cm.
What is the height of the trapezium?A trapezium is a convex quadrilateral with exactly one pair of opposite sides parallel to each other.
The area of a trapezium is expressed as:
Area = 1/2 × ( a + b ) × h
Where a and b are base a and base b, h is height.
Given that:
Area of the trapezium = 36 cm²
Base a = 3 cm
Base b = 6 cm
Height h =?
Plug the given values into the above formula and solve for height:
Area = 1/2 × ( a + b ) × h
36 = 1/2 × ( 3 + 6 ) × h
36 = 1/2 × ( 9 ) × h
36 = 4.5 × h
h = 36 / 4.5
h = 8 cm
Therefore, the height of the trapezium is 8 cm.
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olve the equation 4(2m+5)-39 = 2(3m-7) A. m - 16.5 B. m - 9 C. m - 2.5 D. m --4
On solving, we get the value of m as 22.5.
The given equation is `4(2m+5)-39 = 2(3m-7)`
Solving the equation, we get;`
8m + 20 - 39 = 6m - 14
`Adding 14 to both sides of the equation and combining like terms, we get;
`8m - 6m = 39 + 20 - 14`
Simplifying the above equation, we get;`
2m = 45
`Dividing both sides of the equation by 2, we get the value of m as;`
m = 22.5.
`Hence, the correct answer is - 22.5.
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Which of the following is an example of transmutation? a)Nitrogen-10+ helium-4 → oxygen-17+ hydrogen-1 b)Nitrogen-14 + helium-4 - >> oxygen-17+ hydrogen-1 c)Nitrogen-14 + helium-4 - oxygen-9+ hydrogen 1 d) Nitrogen-14 + helium-1 - oxygen-17+ hydrogen-1
The following is an example of transmutation
a) Nitrogen-10 + helium-4 → oxygen-17 + hydrogen-1
This is an example of transmutation because it involves the transformation of one element (nitrogen-10) and another element (helium-4) into different elements (oxygen-17 and hydrogen-1). Transmutation refers to the process of changing one element into another through nuclear reactions. In this case, the nuclear reaction results in the formation of oxygen-17 and hydrogen-1 from nitrogen-10 and helium-4.
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