You are to create a password using 8 letters from the alphabet (repetition allowed). What is the probability that no letter is repeated if the letters were randomly chosen to be in the password?

Answer:

its b

Step-by-step explanation:

trust me

According to the question Fifty boxes labeled with numbers from 1 to 50 are laid on a table. In each box there is a blue ball and a red ball are as follows :

a) To calculate the probability of picking 8 blue balls and 17 red balls from boxes with even-numbered labels, we need to consider the total number of ways this can occur divided by the total number of possible outcomes.

There are 25 boxes to be chosen, and the boxes with even-numbered labels are numbered 2, 4, 6, ..., 50. There are 25/2 = 12.5 even-numbered boxes.

The probability of picking a blue ball from each even-numbered box is 1/2, and the probability of picking a red ball is also 1/2.

The probability of picking 8 blue balls and 17 red balls from the even-numbered boxes can be calculated using the binomial probability formula:

[tex]\[P(\text{{8 blue balls and 17 red balls from even-numbered boxes}}) = \binom{{12.5}}{{8}} \left(\frac{{1}}{{2}}\right)^8 \left(\frac{{1}}{{2}}\right)^{17}\][/tex]

b) If we accidentally see the fifth ball to be red, it means we have already chosen 4 boxes and picked 4 red balls.

The probability of picking 4 red balls from the first 4 boxes is  [tex]\(\left(\frac{{1}}{{2}}\right)^4\).[/tex]

Now we need to calculate the probability of picking 4 blue balls and 13 red balls from the remaining 21 even-numbered boxes.

The probability can be calculated as:

[tex]\[P(\text{{8 blue balls and 17 red balls from remaining even-numbered boxes}}) = \binom{{21}}{{8}} \left(\frac{{1}}{{2}}\right)^8 \left(\frac{{1}}{{2}}\right)^{13}\][/tex]

The overall probability is the product of the two probabilities calculated in part a) and b).

You can substitute the values and calculate the probabilities using a calculator or computer software.

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The confidence interval for the population mean, μ is y ± t*n-1sn, where y is the sample mean, s is the sample standard deviation, and n is the sample size.

The critical value t*n-1 depends on the confidence level, C, and the number of degrees of freedom, n-1.Critical value t*n−1:The critical value t*n-1 refers to the value of t that separates the middle 100C% of the t distribution from the extreme (tail) regions, where C is the specified confidence level.

The number of degrees of freedom is n - 1. A t-value can be used to determine the confidence interval for a population mean with unknown standard deviation if the sample size is less than 30 or the population is not normally distributed.

Confidence interval:If y is the sample mean and s is the sample standard deviation, the confidence interval for the population mean μ is y ± t*n-1sn, where n is the sample size. The confidence interval is a range of values around the sample statistic that is likely to contain the true population parameter. The confidence interval is used to estimate the value of an unknown parameter, such as a population mean or proportion, and to quantify the level of uncertainty surrounding that estimate.

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Answer: 3.125

Step-by-step explanation:

Given

Triangle is dilated by a factor of [tex]\frac{1}{4}[/tex] i.e. each side multiplies to 0.25.

Side E'F' becomes 0.25 times the original length

[tex]\Rightarrow E'F'=\dfrac{1}{4}\times 12.5=3.125[/tex]

Answer:

A move in cost is a non-refundable fee that landlords charge new tenants to cover the cost of touch ups and small changes made to the rental

=> 9x² - 24x + 16

Split the middle term(term with x) in such a manner so that the product of those parts is equal to the product of term with x² and constant. Here, those parts are 12 & 12 as 12*12 = 9*16.

=> 9x² - 24x + 16

=> 9x² - (12 + 12)x + 16

=> 9x² - 12x - 12x + 16

=> 3x(3x - 4) - 4(3x - 4)

=> (3x - 4)(3x - 4)

Method 2

=> 9x² - 24x + 16

=> (3x)² - 2(3x*4) + 4²

=> (3x - 4)²

=> (3x - 4)(3x - 4)

Method 3

In case if you can't find the factors of the middle term.

Say f(x) = 0, find the zeroes using quadratic formula. Zeroes of this eqⁿ are [-(-24) ± √24²-4(9)(16)] / 2(9) = 4/3 & 4/3

Therefore, f(x) = (x - 4/3)(x - 4/3) = (3x - 4)(3x - 4)/9

Ignore the numeric constant.

f(x) = (3x - 4)(3x - 4)

Answer:

ok we know that volume of a sphere is 4/3 pi r cubed so just replace the letters with the entities given

Answer:

2.7 cm

Step-by-step explanation:

Answer: 350

Step-by-step explanation:

Answer:

1,283 m3

Step-by-step explanation:

Ok so the volume formula is:

π (pi) = 3.14

² = power of two so that number times that number

Example:

3² = 3 × 3 = 9

To find the radius since the diameter is given divide by 2:

14 / 2 = 7

Next we solve the equation:

V = 3.14 × 7² × 25/3 = 1282.817

To round to the neareast whole number 1,283

Answer:

[tex]x= 3.5[/tex]

Step-by-step explanation:

Given

[tex]k =1:4[/tex] --- scale factor

See attachment for squares

Required

Find x

The corresponding side of length x on the bigger square is 14.

So, we have:

[tex]k = x : 14[/tex]

Equate both values of k

[tex]x : 14 = 1 : 4[/tex]

Express as fractions

[tex]\frac{x }{ 14 }= \frac{1 }{ 4}[/tex]

Solve for x

[tex]x= \frac{1 }{ 4} * 14[/tex]

[tex]x= \frac{14}{4}[/tex]

[tex]x= 3.5[/tex]

The inverse function is obtained by interchanging the x and y values of each point. The correct option is b: {(3, 4), (1, 5), (0, 2), (-2, 6), (-5, 7)}; D = {3, 1, 0, -2, -5}; R = {4, 5, 2, 6, 7}.

The domain of the inverse function consists of the x-values from the original function, and the range consists of the y-values from the original function

To compute the inverse of the function, we interchange the x and y values of each point. The inverse function is {(4, 3), (5, 1), (2, 0), (6, -2), (7, -5)}.

The domain of the inverse function is D = {3, 1, 0, -2, -5} which consists of the x-values from the original function. The range of the inverse function is R = {4, 5, 2, 6, 7} which corresponds to the y-values from the original function.

It's important to note that in the inverse function, the roles of the domain and range are swapped. The x-values of the original function become the y-values of the inverse function, and vice versa.

Therefore, the correct answer is option b: {(3, 4), (1, 5), (0, 2), (-2, 6), (-5, 7)}; D = {3, 1, 0, -2, -5}; R = {4, 5, 2, 6, 7}.

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Answer:

1. 1/13,300

2. 1/13,300

3. 2607/2660

Step-by-step explanation:

Probability is the ratio of the number of possible outcomes to the number of total outcome. The probability that an event will happen added to the probability of the same even not happening is 1.

Given that there are 400 containers of frozen orange juice with 4 that are defective,

non-defective = 400 - 4 = 396

Probability of selecting

Non-defective  = 396/400 = 99/100

Defective = 4/100 = 1/100

the probability that the second one selected is defective given that the first one was defective is the same as  the probability that both are defective

= 4/400 *3/399

= 1/13,300

the probability that both are non-defective

= 396/400 * 395/399

= 99/100 * 395/399

= 33*79/20*133

= 2607/2660

Answer:

y = -2x + 8

x = 3

y = x - 1

y = 2

Step-by-step explanation:

if 2x + y = 8 and x - y = 1

you can solve using substitution, elimination, matrix etc.

You will find that x = 3 and y = 2

Hope this helped.

Answer:

138.86

Step-by-step explanation:

Multiply the radius by 2 to get the diameter.

Multiply the result by π, or 3.14 for an estimation.

That's it; you found the circumference of the circle.

The function f(x) is more steeply increasing at all points x than it is at x=1.

If the rate of change of f at x=c is twice its rate of change at x=1, then f(x) is said to be more steeply increasing at x=c than at x=1.

The rate of change of a function f(x) at any point x can be calculated by differentiating the function f(x).

That is, the derivative of the function f(x) gives the rate of change of the function at any point x.

If the rate of change of f(x) at x=1 is f'(1), and its rate of change at x=c is f'(c), then we have f'(c) = 2f'(1)

We can see that f(x) is more steeply increasing at x=c than at x=1 if and only if f'(c) > f'(1).

Since f(x) is twice as steep at x=c than at x=1, we can conclude that f'(c) > f'(1) for all c.

That is, the rate of change of f(x) is greater at any point x=c than at x=1.

Therefore, the function f(x) is more steeply increasing at all points x than it is at x=1.

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Answer:

y = x -3

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

Answer:

C. $80

Step-by-step explanation:

A. $70

B. $65

C. $80

D. $75

When he pays $70 monthly

Number of months = $2330 / $70

= 33.3 months

When he pays $65 monthly

Number of months = $2330 / $65

= 35.9 months

When he pays $80 monthly

Number of months = $2330 / $80

= 29.1 months

When he pays $75 monthly

Number of months = $2330 / $75

= 31.1 months

The monthly amounts that will allow Arthur to pay off his balance the fastest is $80 per month

The probabilities of the five other possibilities are as follows: a) P(A and B) = 1/18, b) P(A and C) = 1/12, c) P(B and C) = 5/18, d) P(B and D) = 1/18, and e) P(C and D) = 1/6.

a) To calculate P(A and B), we need to find the number of outcomes where both a double and an even sum occur. There are 18 possible outcomes with doubles (6 possibilities) multiplied by the number of outcomes where the sum is even (3 possibilities), resulting in a probability of 1/18.

b) P(A and C) requires both a double and the blue die having a higher score than the red die. Out of the 36 possible outcomes, there are 12 outcomes where a double occurs and the blue die score is greater than the red die score, resulting in a probability of 1/12.

c) To calculate P(B and C), we need to find the number of outcomes where the sum is even and the blue die score is greater than the red die score. There are 18 possible outcomes where the sum is even, and out of these, 5 outcomes also satisfy the condition for the blue die score being greater than the red die score. Therefore, the probability is 5/18.

d) P(B and D) requires both an even sum and a 6 on the red die. Out of the 36 possible outcomes, 2 outcomes satisfy these conditions (rolling a 3 on the blue die and rolling a 6 on the red die, or vice versa), resulting in a probability of 1/18.

e) P(C and D) involves both the blue die having a higher score than the red die and rolling a 6 on the red die. Out of the 36 possible outcomes, 6 outcomes satisfy these conditions, resulting in a probability of 1/6.

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The required heat equation is u(x, t) = (A×cos(λx) + B×sin(λx)) × exp(-λ²t)

To solve the heat equation in the given interval [-6, 0], we can use the separation of variables method. Let's denote the dependent variable as u(x, t), where x represents the spatial variable and t represents the temporal variable.

The heat equation in one dimension is given by:

∂u/∂t = α ∂²u/∂x²,

where α is the thermal diffusivity constant.

To solve this equation, we assume that the solution can be represented as a product of two functions, each depending on a single variable:

u(x, t) = X(x)T(t).

Substituting this into the heat equation, we have:

X(x)T'(t) = αX''(x)T(t),

where prime (') denotes differentiation with respect to the variable.

Dividing both sides by αX(x)T(t), we get:

T'(t)/T(t) = αX''(x)/X(x).

Since the left side depends only on t and the right side depends only on x, both sides must be equal to a constant, which we'll denote as -λ²:

T'(t)/T(t) = -λ² = αX''(x)/X(x).

Now, let's solve the temporal part of the equation:

T'(t)/T(t) = -λ²

This is a separable ordinary differential equation (ODE), and its general solution is given by:

T(t) = exp(-λ²t).

Next, let's solve the spatial part of the equation:

αX''(x)/X(x) = -λ².

This is also a separable ODE, and its general solution is given by:

X(x) = A×cos(λx) + B×sin(λx),

where A and B are arbitrary constants.

Therefore, the general solution to the heat equation is:

u(x, t) = (A×cos(λx) + B×sin(λx)) × exp(-λ²t).

Since we have the given interval [-6, 0], we can apply appropriate boundary conditions to determine the values of A, B, and λ that satisfy the problem.

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There are 16 cubes in each layer.

A cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex. Viewed from a corner it is a hexagon and its net is usually depicted as a cross.

Given that, a cube,

Since, we know that, all sides of a cube are equal and the cross-section of the cube is a square,

Therefore, counting the cubes of the front face,

4 cubes vertical and 4 cubes horizontal,

Therefore, total cube in front face = 4×4 = 16

Therefore, cubes in each layer is 16.

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Answer:

d

Step-by-step explanation:

3x times 5x equals 15x^2

3x times -5 equals -15x

---> 15x^2 - 15x

Answer:

y(x)=0

Step-by-step explanation:

To solve the given differential equation using Green's function, we need to first determine the Green's function associated with the given boundary conditions.

The Green's function, G(x, ξ), satisfies the following equation:

(x^2 d^2G / dx^2) + (2x dG / dx) - 4G = δ(x - ξ)

where δ(x - ξ) is the Dirac delta function. We can solve this equation subject to the boundary conditions:

G(0, ξ) = G(∞, ξ) = 0

To solve this differential equation, we assume a solution of the form:

G(x, ξ) = A(x)B(ξ)

Substituting this form into the differential equation and simplifying, we get:

x^2 d^2A / dx^2 + 2x dA / dx - 4A = 0

This is a homogeneous second-order ordinary differential equation. We can solve it by assuming a power series solution of the form:

A(x) = ∑[n=0 to ∞] (a_n x^n)

Substituting this series into the differential equation and equating coefficients of like powers of x, we get:

a_n [(n + 2)(n + 1) - 4] = 0

Solving this equation for the coefficients, we find:

a_0 = 0

a_1 = 0

a_n = 4 / [(n + 2)(n + 1)] for n ≥ 2

Therefore, the solution for A(x) is:

A(x) = 4 * ∑[n=2 to ∞] (x^n / [(n + 2)(n + 1)])

Now, we can substitute the solution for A(x) into the form of the Green's function:

G(x, ξ) = A(x)B(ξ)

G(x, ξ) = 4 * ∑[n=2 to ∞] (x^n / [(n + 2)(n + 1)]) * B(ξ)

To determine B(ξ), we impose the boundary conditions:

G(0, ξ) = 0 => 4 * ∑[n=2 to ∞] (0 / [(n + 2)(n + 1)]) * B(ξ) = 0

G(∞, ξ) = 0 => 4 * ∑[n=2 to ∞] (ξ^n / [(n + 2)(n + 1)]) * B(ξ) = 0

From these conditions, we can conclude that B(ξ) = 0. Hence, the Green's function is:

G(x, ξ) = 0

Now, to obtain the solution to the differential equation, we can use the Green's function in the following integral form:

y(x) = ∫[0 to ∞] G(x, ξ) f(ξ) dξ

where f(ξ) is the inhomogeneous term in the original differential equation.

Since G(x, ξ) = 0, the integral evaluates to zero as well. Therefore, the solution to the given differential equation is:

y(x) = 0

In conclusion, the solution to the differential equation with the given boundary conditions is y(x) = 0.

Answer:

a(10) = 170

Step-by-step explanation:

Given that,

The nth term fo the sequence is :

a(n) =  n² + 7n

We need to find the 10th term of the sequence.

Put n = 10 in the above sequence,

a(10) =  (10)² + 7(10)

= 100 + 70

= 170

So, the 10th term of the sequence is 170.

Answer:

To entertain

Step-by-step explanation:

Because the dad made a joke to entertain, and the story is entertaining the readers.

Answer: entertain

Step-by-step explanation:

Answer:

55

Step-by-step explanation:

Answer:

i think it is 24 meters

Answer:

24 meters

Step-by-step explanation:

perimeter of regular hexagon is

perimeter = 6 × a

where a is the side length

so in the problem a = 4 meters

by apply the formula you will have

perimeter = 6 x 4 meters

perimeter =24 meters