hey everyone! can u guys please help i really struggle in math and i just need some help
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Answer:

12

Step-by-step explanation:

(5 - 1) X 3

4 x 3

12

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Answer:

3

Step-by-step explanation:

Don't know how to explain it I just know that 27 has a perfect cube of 3.

Answer:

n = 9

Step-by-step explanation:

n3 = 27

n3/3 = 27/3

n = 9

The random variable X represents the length of each engineering conference, and is measured in days.

The normal distribution should be used for this problem, as the underlying population is normal. The normal distribution is a continuous probability distribution that is characterized by a symmetric bell-shaped curve. It is a useful model for events that follow a normal or Gaussian pattern, such as the lengths of engineering conferences.

c. i. The 95% confidence interval for the population mean length of engineering conferences is (3.38, 4.50) days.

ii. The graph of the 95% confidence interval for the population mean length of engineering conferences is shown below.

iii. The error bound for the 95% confidence interval is 0.77 days. This can be calculated using the formula: Error Bound = 1.96*(standard deviation/√sample size). In this case, the error bound is calculated as: 1.96 * (1.28/√84) = 0.77.

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Answer: g(x) =  -(1/2)*x + 3.

Step-by-step explanation:

First, let's define a reflection over the x-axis.

If we have a point (x, y) and we reflect it over the x-axis, our new point will be (x, -y).

Now, when we have a function

f(x) = y, the points can be written as:

(x, y = f(x) ) = (x, f(x))

Then, after the reflection over the x-axis, we have:

(x, y = g(x)) = (x, -f(x))

So now we have g(x) = -f(x)

and we know that f(x) = (1/2)*x - 3

then our new function is g(x) =  y = -f(x) = -( (1/2)*x - 3) = -(1/2)*x + 3.

g(x) =  -(1/2)*x + 3.

If the dimensions of the rectangle were doubled, the area in square inches is: \(Area = 4x^2 - 8x\)

Given the following data:

If the dimensions of the rectangle were doubled, the value of L and W becomes;

\(L = 2x\)

\(W = 2(x - 2)\)

Mathematically, the area of a rectangle is given by the formula;

\(Area = Length\) × \(Width\)

\(Area = 2x\) × \(2(x-2)\)

\(Area = 2x\) × \(2x - 4\)

\(Area = 4x^2 - 8x\)  square inches.

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The function of the town's population is an exponential growth

From the question, we have the following parameters that can be used in our computation:

Initial population = 3800

Growth  rate = 2% every year

From the above, we understand that

There is a growth in the population by 2% every year

Using the above as a guide, we have the following:

This means that the function is an exponential growth

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Answer: 60%

Step-by-step explanation:

Sixth-graders that picked the museum = 39

Sixth-graders that picked the factory = 26

Total number of sixth graders = 39 + 26 = 65

Therefore, the percentage of the sixth-graders that picked the museum would be:

= Sixth-graders that picked the museum / Total number of sixth graders × 100

= 39/65 × 100

= 60%

Answer:

Step-by-step explanation:

Given the expression

y = 19.75x------------------1

and y is the number of gallons

we know that

rate= quantity/time

quantity= rate*time-----------2

comparing the two equations

we can see that

the rate is 19.75 gallons/minutes

and the time is x

therefore x is the number of minutes taken

The required proportional ratio is y = 0.08 x. gives Halona 23 minutes to move her 1.93 kilometers to her neighbor's house. As long as you move at a steady pace.

How many kilometers Halona can run in x minutes y expressed as a ratio. Then find y in percentage. The relationship between two or more proportional or inversely proportional sets of values, whether they are directly related or not, is called proportionality.

Here we have

Substitute k into the proportional equation.

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Answer:

It would take her 10 track practices to get up to 40 miles.

Step-by-step explanation:

The surface area of a cuboid is the area of all the six faces of a cuboid. The Paint that is required to paint 3 boxes is 13 pints.

The surface area of a cuboid is the area of all the six faces of a cuboid. It is given by the formula,

\(\rm \text{Surface area of the box}= 2[(Length \times width)+(Width \times Height)+(Length \times height)]\)

As it is given the dimensions of the storage box are a length of 8 feet, a width of 5 1/2 feet(5.5 feet), and a height of 4 1/2 feet(4.5 feet). Therefore, the surface area of the box can be written as,

\(\rm \text{Surface area of the box}= 2[(Length \times width)+(Width \times Height)+(Length \times height)]\)

\(\rm \text{Surface area of the box}= 2[(8\times 5.5)+(5.5\times 4.5)+(8 \times 4.5)] = 209.5\ ft^2\)

As it is given that the surface area that can be covered with a pint of paint is 50 square feet, therefore, the paint that will be required to paint 209 square feet is,

\(\text{Paint Required} = \dfrac{\text{Total area that is needed to be paint}}{\text{Area covered in a pint of paint}}\)

\(\rm \text{Paint Required} = \dfrac{209.5}{50} = 4.19\ pints\)

Now, we know that the surface area of the box is 209 square feet, while the paint required to paint a complete box is 4.19, therefore, the paint that will be required to paint 3 boxes will be,

\(\text{Paint required to paint 3 boxes} = 3 \times 4.19 = 12.57 \approx 13\)

Hence, the Paint that is required to paint 3 boxes is 13 pints.

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The solution of the linear equations will be (-2, 1).

The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result.

A relationship between two or more parameters that, when shown on a graph, produces a linear model. The degree of the variable will be one.

The linear equation is given as,

y = mx + c

Where m is the slope of the line and c is the y-intercept of the line.

The equations are given below.

y = -(5/2)x - 4

y = (1/2)x + 2

The above equations are the equation of the line.

The lines are drawn on the graph. And the lines intersect at (-2, 1).

Thus, the solution of the linear equations will be (-2, 1).

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it would take approximately 0.0004 seconds (or 0.4 milliseconds) to determine the activity with a statistical uncertainty of 2%.

To determine the activity with a statistical uncertainty of 2%, we need to calculate the time interval that would provide sufficient data to achieve this level of precision.

The statistical uncertainty is typically expressed as the standard deviation or the relative standard deviation (coefficient of variation). In this case, let's assume the 2% uncertainty refers to the relative standard deviation.

The relative standard deviation (RSD) is calculated as the standard deviation divided by the mean, expressed as a percentage:

RSD = (Standard Deviation / Mean) * 100%

Given that the mean number of decays in 10 minutes is 1000, we can use this information to calculate the standard deviation:

Standard Deviation = (RSD / 100%) * Mean

                 = (2% / 100%) * 1000

                 = 0.02 * 1000

                 = 20

Now, to determine the time interval required to achieve the desired statistical uncertainty, we can use the following formula:

Time Interval = (Standard Deviation / Mean)²

Time Interval = (20 / 1000)²

             = 0.02²

             = 0.0004

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Answer:

254 dollars.

Step-by-step explanation:

First, we multiply 106 × 0.6 = 63 dollars. Lastly, we just multiply 63 × 4 = 254.

Hope this helps.

Answer:

The answer is 0.8

Step-by-step explanation:

\( \: \: \: \: \: \: 0. 8\\ 5 \sqrt{40} \\ - 40 \\ 0\)

Thus, The answer is 0.8

-TheUnknownScientist 72

The probability that at least one child would draw the nickel too small is: P(X ≥ 1) = 1 - P(X = 0).

b) To find the probability that exactly 4 children would draw the nickel too small, we can use the binomial probability formula. The formula is: P(X = k) = (nCk) * (p^k) * (q^(n-k)), where n is the number of trials, k is the number of successes, p is the probability of success, and q is the probability of failure.

In this case, n = 8 (as 8 children are chosen), k = 4 (as exactly 4 children drawing the nickel too small), p = 0.15 (as the probability of a child drawing the nickel too small), and q = 1 - p = 1 - 0.15 = 0.85.

So, the probability that exactly 4 children would draw the nickel too small is: P(X = 4) = (8C4) * (0.15^4) * (0.85^(8-4)).

c) To find the probability that at least one child would draw the nickel too small, we can use the complement rule. The probability of at least one success is equal to 1 minus the probability of no success.

The probability of no success (all children drawing the nickel of the right size) is given by: P(X = 0) = (8C0) * (0.15^0) * (0.85^8).

Therefore, the probability that at least one child would draw the nickel too small is: P(X ≥ 1) = 1 - P(X = 0).

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Given the equation of the line:

The slope-intercept form is: y = m * x + b

Where (m) is the slope

So, we will solve the given equation for (y)

so, the answer will be the slope-intercept form:

The degrees of freedom are in a t test. Degrees of freedom refer to the number of values in a statistical calculation that are free to vary. In a paired t test, the degrees of freedom are calculated as the number of pairs minus 1.

In the case of using pairs of identical twins in an experimental design for a paired t test, each twin in the pair would be considered one observation. So if we have N pairs of identical twins, we would have a total of 2N observations. Since each pair of twins is considered one observation in the t test, we would have N pairs of observations. Therefore, the degrees of freedom in this t test would be N - 1.

In summary, for an experimental design using pairs of identical twins in a paired t test, the degrees of freedom would be equal to the number of pairs of twins minus 1. This is because each pair of twins is considered one observation in the t test.

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Absolute represented by |x| where x is a number means making the numer positive irrespective of its formal state

1) |-2|<|1|

2< 1

The above statement is false

2) |1|<|0|

1<0

The above statement is also false

3) |-1|<|-2|

1<2

The above statement is true

4) |1| > |-2|

1 > 2

The above statement is false too

Using the normal distribution, the probability that a worker selected at random makes between $500 and $550 is: 2.15%.

The z-score of a measure X of a normally distributed variable with mean mu and standard deviation sigma is given by:

Z = (X - mu)/sigma

The mean and the standard deviation are given as follows:

mu = 400, sigma = 50

The probability is the p-value of Z when X = 550 subtracted by the p-value of Z when X = 500, hence:

X = 550:

Z = (X - mu)/sigma

Z = (550 - 400)/50

Z = 3

Z = 3 has a p-value of 0.9987.

X = 500:

Z = (X - mu)/sigma

Z = (500 - 400)/50

Z = 2

Z = 2 has a p-value of 0.9772.

0.9987 - 0.9772 = 0.0215 = 2.15% probability.

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The fractions to show the value of each 9 in the decima 0.999 are 9/10, 9/100, 9/1000.

To write the fraction that shows the value of each 9 in the decimal 0.999, we can use the following method

The digit 9 in the tenths place represents 9/10 or 0.9.

The digit 9 in the hundredths place represents 9/100 or 0.09.

The digit 9 in the thousandths place represents 9/1000 or 0.009.

Thus, the fractions are

0.9 = 9/10

0.09 = 9/100

0.009 = 9/1000

The value of the 9 on the left is related to the value of the 9 in the middle by a factor of 10.

The value of the 9 on the right is related to the value of the 9 in the middle by a factor of 10, so the 9 on the right is one-tenth the value of the 9 in the middle.

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Therefore, the maximum displacement of the particle is 4 units, and it occurs at time t = 1.

To find the maximum displacement, we need to first determine the particle's velocity and acceleration.

The velocity of the particle is given by the derivative of its position function:

\(v(t) = y'(t) = 3t^2 - 12t + 9\)

The acceleration of the particle is given by the derivative of its velocity function: a(t) = v'(t) = 6t - 12

Now, to find the maximum displacement, we need to find the time at which the particle comes to rest.

This occurs when its velocity is zero:

\(3t^2 - 12t + 9 = 0\)

Simplifying this equation, we get:

\(t^2 - 4t + 3 = 0\)

This quadratic equation factors as:

(t - 1)(t - 3) = 0

So the particle comes to rest at t = 1 or t = 3.

Next, we need to determine whether the particle is at a maximum or minimum at each of these times.

To do this, we look at the sign of the acceleration:

When t = 1, a(1) = 6(1) - 12 = -6, which is negative.

Therefore, the particle is at a maximum at t = 1.

When t = 3, a(3) = 6(3) - 12 = 6, which is positive.

Therefore, the particle is at a minimum at t = 3.

Finally, we need to find the displacement of the particle at each of these times:

\(y(1) = 1^3 - 6(1)^2 + 9(1) = 4\)

\(y(3) = 3^3 - 6(3)^2 + 9(3) = 0.\)

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Step-by-step explanation:

\(circumference = 2\pi\: r \: \\ = 2 \times 3.14 \times 86 \\ = 540.08\)

Answer:

540.08

Step-by-step explanation:

55% of the claims are within one standard deviation of the mean claim size.

To find the percentage of claims that are within one standard deviation of the mean claim size, we first need to calculate the mean and standard deviation of the distribution.

The mean claim size is:

u = (20 × 0.10) + (30 × 0.10) + (40 × 0.10) + (50 × 0.20) + (60 × 0.15) + (70 × 0.10) + (80 × 0.25) = 54

The variance can be calculated as follows:

s^2 = [\((20-54)^{2}\) × 0.10] + [\((30-54)^{2}\) × 0.10] + [\((40-54)^{2}\) × 0.10] + [\((50-54)^{2}\) × 0.20] + [\((60-54)^{2}\) × 0.15] + [\((70-54)^{2}\) × 0.10] + [\((80-54)^{2}\) × 0.25] = 340

The standard deviation is the square root of the variance:

s = √340 ≈ 18.44

To find the percentage of claims that are within one standard deviation of the mean claim size, we need to find the range of claim sizes that fall within the interval (u - s, u + s).

(u - s) = 54 - 18.44 = 35.56

(u + s) = 54 + 18.44 = 72.44

We can see from the table that the claim sizes 40, 50, 60, and 70 fall within this range, and their probabilities add up to:

0.10 + 0.20 + 0.15 + 0.10 = 0.55

Therefore, 55 percentage of the claims are within one standard deviation of the mean claim size.

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Answer:

Your answer would be C

Step-by-step explanation:

Trust it's c and if it's not I am sorry but trust me.

Answer:

-3

Step-by-step explanation:

in every term we subtract 2 so

7-2=5

so in every answer subtract 2

5-2=3

3-2=1

1-2=-1

-1-2=-3

Answer:

- 3

Step-by-step explanation:

There is a common difference between consecutive terms in the sequence, that is

5 - 7 = 3 - 5 = 1 - 3 = - 1 - 1 = - 2

Thus subtracting 2 from the last term shown gives the next term

- 1 - 2 = - 3