Calculate the area formed by the curve y = x 2 − 9 , the x-axis,
andtheordinates x=−1 and x=4.

The given equation for the fractional part of a battery, B, that is still good after I hours of use is B = 3-004. We need to find the fractional part of the battery that is still operating after 100 hours of use.

To do that, we substitute the value of I with 100 in the equation B = 3-004:

B = 3-004 = 3-004 = 2-996.

Therefore, after 100 hours of use, the fractional part of the battery that is still operating is 2-996.

The equation B = 3-004 represents the relationship between the fractional part of the battery that is still good and the hours of use. The term 3-004 represents the fraction of the battery that is still operating after a certain number of hours. By substituting I with 100 in the equation, we can determine the specific fractional part of the battery that remains operational after 100 hours of use, which is calculated to be 2-996. This means that approximately 2.996 or 99.6% of the battery is still functioning after 100 hours.

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True. When computing a t statistic, it is necessary to use the sample variance (or standard deviation) to estimate the standard error for the sample mean.

The standard error represents the standard deviation of the sampling distribution of the sample mean. By using the sample variance (or standard deviation), we can estimate the variability of the sample mean from the population mean.

The formula to calculate the standard error of the sample mean is: standard deviation / √(sample size). The sample variance is used to estimate the population variance, and the sample standard deviation is the square root of the sample variance.

The t statistic is computed by dividing the difference between the sample mean and the population mean by the estimated standard error of the sample mean. This t statistic is used in hypothesis testing or constructing confidence intervals when the population parameters are unknown.

Therefore, the sample variance (or standard deviation) is crucial in calculating the estimated standard error, which in turn is necessary for computing the t statistic and making statistical inferences about the sample mean.

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Sorry for bad handwriting

if i was helpful Brainliests my answer ^_^

(a) The complementary solution, yc, for the associated homogeneous equation is yc(x) = C1e^(-3x) + C2e^(2x).

To find the complementary solution, we consider the homogeneous equation associated with the given differential equation, which is obtained by setting the right-hand side of the differential equation to zero. The general form of the complementary solution is in the form yc(x) = C1e^(r1x) + C2e^(r2x), where r1 and r2 are the roots of the characteristic equation. In this case, the characteristic equation is r^2 - 3r + 2 = 0, which has roots r1 = 1 and r2 = 2. Substituting these values into the general form gives us the complementary solution yc(x) = C1e^(-3x) + C2e^(2x).

(b) To find a particular solution, yp, using the method of undetermined coefficients, we assume that yp(x) has the form yp(x) = Ax + Be^(3x).

We assume that the particular solution has the same form as the non-homogeneous term, but with undetermined coefficients A and B. By substituting this assumed form into the original differential equation, we can solve for the coefficients A and B. After solving, we obtain the particular solution yp(x) = 2x + (27/10)e^(3x).

(c) To solve the initial value problem, we combine the complementary and particular solutions: y(x) = yc(x) + yp(x).

Given the initial conditions y(0) = 4, y'(0) = 13, and y''(0) = 33, we substitute these values into the general solution obtained in part (c). After evaluating the equations, we find the particular solution that satisfies the initial conditions: y(x) = (27/10)e^(3x) - (36/5)e^(2x) + 2x + 4.

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The value using Green's theorem will be zero.

Given that:

[tex]\begin{aligned} \rm I &= \int_C (x^2 - y^2) dx + 2xydy \end{aligned}[/tex]

C: x² + y² = 16

A line integral over a closed curve is equivalent to a double integral over the area that the curve encloses according to Green's theorem, a basic conclusion in vector calculus. It ties the ideas of surface and line integrals together.

Formally, let D be the area encompassed by C, which is a positively oriented, piecewise smooth, closed curve in the xy plane. Green's theorem asserts that if P(x, y) and Q(x, y) are continuously differentiable functions defined on an open area containing D:

∮C (Pdx + Qdy) = ∬D (Qx - Py) dA

The radius of the circle is calculated as,

x² + y² = 16

x² + y² = 4²

The radius is 4. Then we have

[tex]\begin{aligned} \vec{F}(x,y)&=(x^2-y^2) \hat{i} + (2xy)\hat{j}\\\\\vec{F}(x,y)&=\vec{F_1}(x,y) \hat{i} + \vec{F_2}(x,y) \hat{j}\\\\\dfrac{\partial F_2 }{\partial x} &= \dfrac{\partial F_1}{\partial y}\\\\\dfrac{\partial F_2 }{\partial x} &= \dfrac{\partial }{\partial x} (2xy) \ \ \ or \ \ \ 2y\\\\\dfrac{\partial F_1}{\partial y}&=\dfrac{\partial }{\partial y} (x^2-y^2) \ \ \ or \ \ \ -2y \end{aligned}[/tex]

The value is calculated as,

[tex]\begin{aligned} \int_C F_1dx + F_2 dy &= \int_R\int \left( \dfrac{\partial F_2}{\partial x} - \dfrac{\partial F_1}{\partial y} \right ) dxdy\\ \end{aligned}[/tex]

Substitute the values, then we have

[tex]\begin{aligned}I &= \int_R \int (2y - (-2y))dxdy\\I &= 4 \int_{x=-4}^4 \int_{y= -\sqrt{16-x^2}}^{y = \sqrt{16-x^2}} y dy\\I &= 4 \int_{x=-4}^4 \left [ \dfrac{y^2}{2} \right ]_{ -\sqrt{16-x^2}}^{y\sqrt{16-x^2}} \\I &=2 \int_{x=-4}^4 [(16-x^2)-(16-x^2)]dx\\I &= 2 \int_{x=-4}^4 0 dy\\I &= 0 \end{aligned}[/tex]

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The limit of the function is solved by L'Hopital's rule and the value of the relation [tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )} = -2/5[/tex]

Given data ,

To evaluate the limit of the expression  [tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )}[/tex], we can use series expansion.

Let's start by expanding the function tan⁻¹x in a Taylor series around x = 0. The Taylor series expansion for tan⁻¹x is:

[tex]tan^{-1}x = x - \frac{x^{3}}{3} + \frac{x^{5}}{5} - \frac{x^{7}}{7} + ...[/tex]

Now, let's substitute this expansion into the given expression:

[tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )}[/tex]

[tex]=\lim_{x \to 0} \frac{[ x - \frac{x^{3}}{3} + \frac{x^{5}}{5} - \frac{x^{7}}{7} + .. ]}{x^{4}} \\[/tex]

[tex]=\lim_{x \to 0} \frac{[ \frac{1}{3}+\frac{x^{2}}{5}+\frac{x^{4}}{7}..... ]}{x^{1}} \\[/tex]

Now, we can apply the limit as x approaches 0:

[tex]=\frac{[\frac{1}{3} -\frac{0}{5} +\frac{0}{7} ....]}{0}[/tex]

= 0/0 (indeterminate form)

To evaluate this indeterminate form, we can use L'Hopital's rule. Taking the derivative of the numerator and denominator, we get:

So, [tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )} = -2/5[/tex]

Hence , the limit of the expression [tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )} = -2/5[/tex]

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To fill the rectangular prism we need 1 cube.

To find the number of cubes needed to fill the rectangular prism, we can calculate the volume of the prism and divide it by the volume of a single cube.

The volume of the rectangular prism is given by the formula:

Volume = Length × Width × Height

Substituting the given values:

Volume = 8 in. × 4 in. × 21 in.

Volume = 672 in³

The volume of a cube is given by the formula:

Volume = Edge Length³

Substituting the given edge length:

Volume of a cube = (14 in.)³

Volume of a cube = 2744 in³

Now, we can divide the volume of the prism by the volume of a single cube to find the number of cubes needed:

Number of cubes = Volume of prism / Volume of a single cube

Number of cubes = 672 in³ / 2744 in³

Calculating this division gives:

Number of cubes ≈ 0.245

Since we cannot have a fraction of a cube, we need to round up to the nearest whole number. Therefore, we would need 1 cube to fill the rectangular prism.

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Answer:

x = 165°

Step-by-step explanation:

Linear pair: If the uncommon arm of adjacent angles form a straight line, then they are called linear pair and these adjacent angles add up to 180°

        15 + x = 180

Subtract 15 from both sides,

                x = 180 - 15

               x = 165°

Answer: 648cm^3

Step-by-step explanation:

Volume=area of base * height

Area of base: 0.5*9*24=108

108*6=648cm^3

Step-by-step explanation:

27:84:38      divide all of the terms by 27   ( to get '1' as the first number)

1  :  3.1  :  1.4

AC=5cm

CB=4cm

hypotenuse=5²+4²=25+16=41

hypotenuse=√41=6.40cm

Answer:

No, false, absolutely not, nada, by no means, not at all.

Step-by-step explanation:

When approaching complex, multi-step problems, I always tell people to list the information they have first and then make a plan to solve their problem to minimize mistakes.

The information that we have right now:

- She bought a dress for $29.98

- She bought shoes for $39

- She bought 2 belts for $14.99 each

- The tax for everything was $7.92

The plan:

Add up everything and see if if it is less or more than $100.

29.98+39+14.99(2)+7.92 = ?

= 106.88

106.88 is more than 100, so NO, she CANNOT pay for everything with 100$

If the bank changed its policy to charge the interest compounded quarterly at the same rate, the amount Gita would be paying after the change in the bank's policy for two years would be approximately Rs 107,656.99.

To calculate the amount Gita would be paying after the change in the bank's policy, we need to consider two separate compounding periods: the first year with semi-annual compounding and the second year with quarterly compounding.

First, let's calculate the amount after the first year using semi-annual compounding. The formula to calculate the amount with compound interest is given by:

A = P * (1 + r/n)^(n*t)

Where:

A = Amount after time t

P = Principal amount (initial loan)

r = Annual interest rate (as a decimal)

n = Number of compounding periods per year

t = Time in years

For the first year, Gita borrowed Rs 85,000 at an annual interest rate of 12%, compounded semi-annually. So, we have:

P = Rs 85,000

r = 12% = 0.12

n = 2 (semi-annual compounding)

t = 1 (year)

Using the formula, the amount after the first year is:

A1 = 85000 * (1 + 0.12/2)^(2*1) ≈ Rs 95,860.00

Now, for the second year, the compounding frequency changes to quarterly. The formula remains the same, but now we have:

P = Rs 95,860.00 (amount after the first year)

r = 12% = 0.12

n = 4 (quarterly compounding)

t = 1 (year)

Using the formula, the amount after the second year is:

A2 = 95860 * (1 + 0.12/4)^(4*1) ≈ Rs 107,656.99

Therefore, the amount Gita would be paying after the change in the bank's policy for two years would be approximately Rs 107,656.99.

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Therefore, the first partial derivatives of the function f(x, y, z) = 9x sin(y - z) are: fx(x, y, z) = 9 sin(y - z), fy(x, y, z) = 9x cos(y - z), fz(x, y, z) = -9x cos(y - z).

To find the first partial derivatives of the function f(x, y, z) = 9x sin(y - z), we differentiate with respect to each variable separately.

fx(x, y, z):

Taking the derivative with respect to x, we treat y and z as constants:

fx(x, y, z) = 9 sin(y - z)

fy(x, y, z):

Taking the derivative with respect to y, we treat x and z as constants:

fy(x, y, z) = 9x cos(y - z)

fz(x, y, z):

Taking the derivative with respect to z, we treat x and y as constants:

fz(x, y, z) = -9x cos(y - z)

Therefore, the first partial derivatives of the function f(x, y, z) = 9x sin(y - z) are:

fx(x, y, z) = 9 sin(y - z)

fy(x, y, z) = 9x cos(y - z)

fz(x, y, z) = -9x cos(y - z)

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Answer:

Answer for the question is A)

Answer:

A) 3:5 = 12:20

Step-by-step explanation:

The numbers should have the same proportion, so if you multiply the ratio with smaller numbers each by a specific number, it should equal the same ratio as the ratio with the bigger number (or even if you divide the ratio with bigger numbers to see if it equals the ratio with smaller numbers)

Example:

A) multiply 3:5 by 4:

3 x 4 = 12

5 x 4 = 20

Has the same proportion as 12:20, so that expresses a true proportion

B) multiply 14:6 by 2:

14 x 2 = 28

6 x 2 = 12

28:12 does not equal to 28:18, so not the same proportion.

C) multiply 6:2 by 7:

6 x 7 = 42

2 x 7 = 14

42:14 does not equal to 42:7, so not the same proportion.

Using sine rule, the bearing of A's route from C is 109.1°

To calculate the bearing of A's route from port C, we can use trigonometry and the given information. Let's denote the bearing of A's route from C as θ.

Since we have the value of three sides and only one angle, we can use sine rule to find the missing side.

a / sin A = b / sin B

10/ sin 40 = 8 / sin B

sin B = 8sin 40/ 10

sin B = 0.51423

B = sin⁻¹ (0.51423)

B = 30.94

Using the sum of angles in a triangle;

30.94 + 40 + x = 180

x = 109.1°

The bearing of A to C is 109.1°

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The area of the shapes are ;

1. 155cm²

2. 236.3 cm²

The area of a shape is the space occupied by the boundary of a plane figures like circles, rectangles, and triangles.

1. The shape is divided into parallelogram and trapezium.

area of trapezoid = 1/2(a+b) h

= 1/2( 3+13)8

= 1/2 × 16 × 8

= 64cm²

area of parallelogram

= b× h

= 13 × 7

= 91 cm²

The area of the shape = 91 +64

= 155cm²

2. area of 2 semi circle = area of circle

Therefore the surface area of the shape = πr² + πrh

= πr(r+h)

= 3.14 × 3.5( 3.5 + 18)

= 10.99 × 21.5

= 236.3 cm²

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The difference in the number of sit-ups between each day is constant. Therefore, we can use arithmetic sequence to solve that problem.

What we'll be looking for is [tex]a_{12}[/tex].

[tex]a_n=a_1+(n-1)\cdot d[/tex]

[tex]a_1=17[/tex]

[tex]d=4[/tex]

Therefore

[tex]a_{12}=17+(12-1)\cdot 4=17+11\cdot4=17+44=61[/tex]

Since the probability that each airplane part passes inspection is 93%, the probability that all five of the next parts pass inspection is:

(0.93)^5 = 0.696

Use code with caution. Learn more

This is about a 70% chance that all five of the next parts will pass inspection.

However, it is important to note that this is just a probability. It is possible that all five parts will pass inspection, but it is also possible that none of them will pass inspection

The value of VW which is the missing length of the given triangle VWZ would be = 43.2

To calculate the missing part of the triangle, the formula that should be used is given as follows;

XW/VX = YZ/YV

Where;

XW = 72

YZ = 55

VX = 72+VW

YV = 88

That is;

= 72/72+VW = 55/88

6,336 = 3960+55VW

55VW = 6336-3960

55VW = 2376

VW = 2376/55

= 43.2

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Answer:

To calculate the experimental probability of landing on the word apple (A), you need to know how many times the spinner landed on apple (A) out of the 30 spins. Experimental probability is calculated by dividing the number of times the event occurred by the total number of trials.

In this case, the formula for calculating the experimental probability of landing on apple (A) would be:

P(apple) = (Number of times spinner landed on apple) / (Total number of spins)

Without knowing how many times the spinner landed on apple (A), it is not possible to calculate the experimental probability.

Measure of angle D in the quadrilateral ABCD is 55°.

Given a quadrilateral which is inscribed inside a circle.

Opposite angles of a quadrilateral sum up to 180°.

2x - 7 + x + 4 = 180

3x - 3 = 180

3x = 183

x = 61

∠D + 2x + 3 = 180

∠D + 2(61) + 3 = 180

∠D = 55°

Hence the angle D is 55°.

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The interaction degrees of freedom for an ANOVA with six levels of Factor A and six levels of Factor B would be 25.

In an ANOVA with interaction, the interaction degrees of freedom are calculated as the product of the degrees of freedom for Factor A and Factor B.

In this case, since both Factor A and Factor B have six levels, the degrees of freedom for Factor A would be 6 - 1 = 5, and the degrees of freedom for Factor B would also be 6 - 1 = 5. Therefore, the interaction degrees of freedom would be 5 * 5 = 25.

The interaction degrees of freedom represent the variability in the data that is attributed to the interaction between Factor A and Factor B. It reflects the unique information gained from considering the joint effects of both factors and allows us to assess whether the interaction is statistically significant.

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The expected number of students participating in each activity would be:

Playing: 45 students

Reading story books: 30 students

Watching TV: 20 students

Listening to music: 10 students

Painting: 15 students

To determine the number of students expected to participate in each activity, you can calculate the percentage of students engaging in each activity and then apply that percentage to the total student population of 2,000.

Playing: 45 students

Percentage: (45 / 2,000) x 100% = 2.25%

Expected number of students: 2.25% of 2,000 = 45

Reading story books: 30 students

Percentage: (30 / 2,000) x 100% = 1.5%

Expected number of students: 1.5% of 2,000 = 30

Watching TV: 20 students

Percentage: (20 / 2,000) x 100% = 1%

Expected number of students: 1% of 2,000 = 20

Listening to music: 10 students

Percentage: (10 / 2,000) * 100% = 0.5%

Expected number of students: 0.5% of 2,000 = 10

Painting: 15 students

Percentage: (15 / 2,000) x 100% = 0.75%

Expected number of students: 0.75% of 2,000 = 15

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125 degrees is  the missing angle of the triangle

In a triangle b=3 ;  a=9 ;  c=11

We want to determine the value of Angle C.

Since we are given three sides of the triangle, we use the Law of Cosines to find any of the angles.

C²=a²+b²-2abcosC

11²=9²+3²-2(9)(3)cosC

121=81+9-54cosC

121=90-54cosC

Subtract 90 from both sides

31=-54cosC

cosC=-31/54

C=cos⁻¹(31/54)

C=125 degrees

Hence, the missing angle of the triangle is 125 degrees

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The correct option is a) l = 94.78 feet.The angle of elevation of the sun is 34, and the height of a tree is 53 feet

We have to find the length of a shadow cast by the tree, represented by "l".Step-by-step solution:

Let AB be the tree, and BC be its shadow. We can assume that the angle of elevation of the sun is measured from the top of the tree, point A, to the sun, point S.

Therefore, the angle of elevation of the sun is ∠BAS.

Let's use trigonometry to solve for the length of the shadow, "l".tan(∠BAS) = opposite / adjacent tan(34)

= AB / BC

We know that AB = 53.

Therefore,

tan(34)

= 53 / BCB

= 53 / tan(34)B

= 94.78 feet (rounded to two decimal places)

Therefore, the length of the shadow cast by the tree is

l = BC

=94.78 feet, rounded to two decimal places.

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In statistics, SSB stands for the "sum of squares between groups." The sum of squares between groups (SSB) is a measurement of the difference between the sample means and the population mean.

The variability between the treatment conditions must be established in order to do the SSB (Sum of Squares Between) calculation. The SSB calculates the variations in group means.

First, we determine the data's overall mean:

Mean = (10 + 12 + 13 + 8 + 17 + 20 + 10 + 9 + 6 + 10 + 26) / 15 = 12

The mean is then determined for each treatment condition:

The average number of warnings is (10 + 8 + 10 + 6) / 4 = 8.5 

The average number of warnings is (12 + 17 + 9 + 10) / 4 = 12.

(13, 20, and 26) / 3 (two warnings on average) = 19.67

The following formula can be used to determine SSB:

SSB is equal to n1 times the overall mean (Mean1), n2 times the overall mean (Mean2), and n3 times the overall mean (Mean3).

where the sample sizes for each treatment condition are n1, n2, and n3.

Given the information, n1 = 4, n2 = 4, and n3 = 3.

SSB = 4 * (8.5 - 12)^2 + 4 * (12 - 12)^2 + 3 * (19.67 - 12)^2

= 4 * (-3.5)^2 + 4 * (0)^2 + 3 * (7.67)^2

= 49 + 0 + 176.88

= 225.88

SSB is therefore 225.88 (rounded to the nearest hundredth).

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The perimeter of the triangle is 77 cm.In an isosceles triangle, the two legs are congruent, meaning they have the same length.

Let's assume that the length of each leg is 15 cm.

The perimeter of a triangle is the sum of the lengths of all its sides. In this case, the triangle has two congruent legs with a length of 15 cm each.

So, the perimeter of the triangle can be calculated as follows:

Perimeter = 15 cm + 15 cm + 31 cm

Perimeter = 46 cm + 31 cm

Perimeter = 77 cm

Therefore, the perimeter of the triangle is 77 cm.

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After 8 seconds the ball height was 42 units.

It is defined as the graph of a quadratic function that has something bowl-shaped.

It is given that on a game show, contestants shoot a foam ball toward a target. The table includes points along one path the ball can take to hit the target where x is the time that has passed since the ball was launched and y is the height at this time.

It is required to find how high was the ball after 8 seconds.

The orbit of the ball will be a parabola.

We know the standard form of a quadratic function:

[tex]\text{y}=\text{ax}^2+\text{bx}+\text{c}[/tex] where [tex]\text{a}\ne\text{0}[/tex]

At x = 0 and y = 10, we get:

[tex]\sf 10=a(0)^2+b(0)+c[/tex]

[tex]\sf 10=c[/tex]

[tex]\sf c=10[/tex]

At x = 2 and y = 24, we get:

[tex]\sf 24=a(2)^2+b(2)+c[/tex]

[tex]\sf 24=4a+2b+10[/tex]

[tex]\sf 4a+2b=14[/tex]                   ....(1)

At x = 16 and y = 10, we get:

[tex]\sf 10=a(16)^2+b(16)+c[/tex]

[tex]\sf 10=256a+16b+10[/tex]

[tex]\sf 256a+16b=0[/tex]               ....(2)

By solving equations (1) and (2), we get;

a = - 1/2, b = 8 and c = 10

Putting these values in the standard form of a quadratic function, we get:

[tex]\sf y=-\sf \frac{1}{2}x^2 +8x+10[/tex]

Now, after 8 seconds means when x = 8, we get:

[tex]\sf y=-\sf \frac{1}{2}\times 8^2 +8\times8+10[/tex]

[tex]\sf y=-32+64+10[/tex]

[tex]\sf y=42[/tex]

Thus, after 8 seconds the ball height was 42 units.

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The fraction that is doubled after subtracting the fourth part of the original fraction is equal to 3n/2

Let the numerator be represented by the variable 'n'.

Now, break down the problem step by step.

The fourth part of the numerator is n/4.

Subtracting the fourth part from the numerator gives us n - (n/4).

Simplifying, we have (4n - n)/4 = 3n/4.

So, the numerator after subtracting the fourth part is 3n/4.

To find the fraction that is doubled,

we need to compare the original fraction (n/4) with the result of doubling the fraction after subtracting the fourth part (2×(3n/4)).

The original fraction is n/4, and doubling after applying the other conditions gives us 3n/2.

Therefore, the fraction that is doubled as per given details is 3n/2.

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