a force of 18 lb is required to hold a spring stretched 2 in. beyond its natural length. how much work w is done in stretching it from its natural length to 4 in. beyond its natural length? w

The loads carried by an elevator are found to follow a normal distribution with a mean weight of 1812 lbs, and a standard deviation of 105.3 lbs. The answer is c) [1606, 2018].

To answer this question, we need to use the concept of confidence intervals. A 95% confidence interval means that in 95% of all cases, the true population parameter (in this case, the weight of the elevator load) will fall within the interval.

To find the interval centered about the mean, we need to calculate the margin of error first. The formula for margin of error is:

Margin of Error = z*(standard deviation/square root of sample size)

Since we do not have a sample size here, we will use the population standard deviation instead.

For a 95% confidence level, the z-value is 1.96. So, plugging in the values we have:

Margin of Error = 1.96*(105.3/square root of 1)

Margin of Error = 205.97

Now, we can find the interval by adding and subtracting the margin of error from the mean:

Interval = [1812 - 205.97, 1812 + 205.97]

Interval = [1606.03, 2017.97]

Therefore, the answer is c) [1606, 2018].

to learn more about mean click here:

brainly.com/question/30094057

#SPJ11

The area of the region is 25/3 square units.

Any point on a parabola is at an equal distance from both the focus, a fixed point, and the directrix, a fixed straight line. A parabola is a U-shaped plane curve.

First, let's find the equation of the tangent line to the parabola at the point (5,100). The derivative of y = 4x² is y' = 8x, so the slope of the tangent line at x = 5 is y'(5) = 8(5) = 40. Thus, the equation of the tangent line is y - 100 = 40(x - 5), or y = 40x - 100.

To find the points of intersection of the parabola and the tangent line with the x-axis, we need to solve the equations y = 4x² and y = 40x - 100 for y = 0:

4x² = 0 => x = 0

40x - 100 = 0 => x = 2.5

So the region we want to find the area of is bounded by the x-axis and the curves y = 4x² and y = 40x - 100, with x ranging from 0 to 2.5.

To find the area, we need to integrate the difference between the two functions with respect to x:

A = ∫[0, 2.5] (40x - 100 - 4x²) dx

A = [20x² - 4/3 x³]0 to 2.5

A = 20(2.5)² - 4/3 (2.5)³ - 0

A = 25/3

Therefore, the area of the region is 25/3 square units.

Learn more about parabola on:

https://brainly.com/question/12595802

#SPJ4

Answer:

-√36

Step-by-step explanation:

The first (approx. 3.567) is obviously irrational, as it continues forever; the decimal values do not end.

The next (√18) is approx. 4.243 and is irrational.

The next (π/3) is irrational because it involves an irrational number, π.

The last (-√36) is -6 and is therefore rational.

Answer:

4) 24

Step-by-step explanation:

Diagonals of a rectangle are congruent and bisect each other.

AE = x + 2

BD = 4x - 16

2AE = BD

2(x + 2) = 4x - 16

2x + 4 = 4x - 16

20 = 2x

x = 10

AC = BD = 4x - 16 = 4(10) - 16 = 40 - 16 = 24

Answer: 4) 24

The value of the test statistic is approximately -3.02. this value represents how far the sample mean is from the hypothesized population mean in terms of the standard error of the mean.

The test statistic can be calculated using the formula: t = (X - μ) / (s / √n)

where X is the sample mean (4.0 psi), μ is the hypothesized population mean (4.1 psi), s is the population standard deviation (0.7 psi), and n is the sample size (150). Plugging in the values, we get: t = (4.0 - 4.1) / (0.7 / √150) ≈ -3.02

Therefore, the value of the test statistic is approximately -3.02. This value represents how far the sample mean is from the hypothesized population mean in terms of the standard error of the mean.

A negative value indicates that the sample mean is lower than the hypothesized population mean. A value of -3.02 is quite far from zero, suggesting that the engineer's claim that the valve performs to specifications may be false.

The next step would be to determine the corresponding p-value and compare it to the level of significance to make a decision about rejecting or failing to reject the null hypothesis.

To know more about value click here

brainly.com/question/30760879

#SPJ11

The school district's magnet school programs, of the 1882 qualified applicants, 52.44% were accepted, 16.41% were waitlisted, and 31.15% were turned away for lack of space.

The relative frequency for each decision made by the school district regarding their magnet school programs.
First, let's define relative frequency.

It is the fraction or proportion of the total data that belongs to a particular category or class. In this case, the categories are "accepted," "waitlisted," and "turned away."
To find the relative frequency for each decision, we need to divide the number of applicants in each category by the total number of qualified applicants, which is 1882.
So, the relative frequency for "accepted" is:
987/1882 = 0.524 or 52.4%
The relative frequency for "waitlisted" is:
309/1882 = 0.164 or 16.4%
And the relative frequency for "turned away" is:
586/1882 = 0.312 or 31.2%
To summarize the results, we can say that out of the 1882 qualified applicants for the school district's magnet school programs, 52.4% were accepted, 16.4% were waitlisted, and 31.2% were turned away due to lack of space.

This indicates that there is high demand for these programs and the school district needs to consider expanding their capacity to accommodate more students.

For similar question on school programs

https://brainly.com/question/21573814

#SPJ11

The market share of the four remaining companies is 29% to the nearest percent.

The market share the four remaining companies have, to the nearest percent is calculated as follows;

The revenue of the other four companies is calculated as;

R = $4,120,500 - $2,940,000

R = $1,180,500

The market share of the four remaining companies is calculated as follows;

market share = ($1,180,500 / $4,120,500) x 100

market share = 28.65% ≈ 29%.

Learn more about market share here: https://brainly.com/question/4017104

#SPJ1

The inequality that determines the number of miles that Eddie can travel is $1.75 + $0.25x  ≤ $15 (first option).

The first step is to determine the inequality sign that would be used.

Here are inequality signs and what they mean:

The sign that would be used is (≤) less than or equal to

The form of the inequality is:

[flat fee + (cost per mile x number of miles)] ≤ total amount she has

$1.75 + ($0.25 × x) ≤ $15

$1.75 + $0.25x  ≤ $15

To learn more about inequality, please check: https://brainly.com/question/5031619

#SPJ1

the randomly generated integer between 0 and 100 (inclusive). If there is a tie, the winner will be randomly selected from the tied submissions. What is the probability that a person who buys a ticket with a single submission will win the lottery

The probability that a person will win depends on the number of people who buy tickets and submit their integers. Assuming there are n participants, each person's submission has a 1/n chance of being selected as the winner.

Since there are 101 possible integers that can be generated, the probability that any given person's submission is exactly correct is 1/101. Therefore, the probability that a person who buys a ticket with a single submission will win the lottery is 1/n * 1/101.

Learn more about Probability here:- brainly.com/question/13604758

#SPJ11

The domain of the relation in the graph is:

{-2, -1, 0, 2, 5}

A relation maps elements from one set (the domain) into elements from another set (the range).

Such that the domain is represented in the horizontal axis.

In the graph, we can see the points:

{(-2, -3), (-1, -1), (0, 3), (2, 1), (5, 2)}

The domain is the set of the first values of these points, then the domain is:

{-2, -1, 0, 2, 5}

The correct option is the first one.

Learn more about domains at:

https://brainly.com/question/1770447

#SPJ1

To divide the polynomial p(x) by d(x), we can use long division or synthetic division. Let's say we choose to use long division.

First, we need to write the polynomials in descending order of degree, with any missing terms filled in with zeros. Let's say the polynomials are:

p(x) = 3x^3 - 5x^2 + 2x + 4
d(x) = x - 2

Then, we set up the long division like this:

         3x^2 + x + 4
   x - 2 | 3x^3 - 5x^2 + 2x + 4

We divide the first term of p(x) by the first term of d(x), which gives us 3x^2. We write this above the division bar and multiply it by d(x), which gives us 3x^3 - 6x^2. We subtract this from p(x), bringing down the next term:

         3x^2 + x + 4
   x - 2 | 3x^3 - 5x^2 + 2x + 4
         - 3x^3 + 6x^2
             ----------
              -11x^2 + 2x

We repeat the process with the next term, dividing -11x^2 by x to get -11x, writing this above the division bar, and multiplying it by d(x) to get -11x + 22. We subtract this from -11x^2 + 2x, bringing down the next term:

         3x^2 + x + 4 - 11/(x-2)
   x - 2 | 3x^3 - 5x^2 + 2x + 4
         - 3x^3 + 6x^2
             ----------
              -11x^2 + 2x
              + 11x^2 - 22
              ----------
                     -20

Since we have no more terms to bring down, our remainder is -20. Therefore, the quotient p(x)/d(x) is:

p(x)/d(x) = 3x^2 + x + 4 - 11/(x-2) - 20/(x-2)^2

We can express this in the form p(x) d(x) by multiplying both sides by d(x):

p(x) = d(x) (3x^2 + x + 4 - 11/(x-2) - 20/(x-2)^2)
To answer your question, we'll first need the specific polynomials for p(x) and d(x) that you'd like to divide. However, I can still guide you through the general steps to perform the division and express the quotient.

1. Choose either synthetic or long division, depending on your preference and the complexity of the polynomials.
2. Divide p(x) by d(x) using the chosen method. Make sure to follow the steps of the division process carefully to obtain the correct quotient and remainder.
3. Once the division is complete, express the quotient p(x)/d(x) in the form p(x) = d(x) * q(x) + r(x), where q(x) is the quotient and r(x) is the remainder.

Visit here to learn more about polynomial brainly.com/question/11536910

#SPJ11

Large MAD tells us that the average distance between each data value and the mean is large.

Given that;

The mean age of swimmers for all of these teams is 10.

Since, MAD is the mean absolute deviation (MAD) of a set, it tells the average distance between each data value and the mean.

Hence, It is a method to express the variance in the data set.

So, the large MAD tells us that the average distance between each data value and the mean is large.

Learn more about the mathematical expression visit:

brainly.com/question/1859113

#SPJ1

A confidence level is a statistical term that refers to the probability that a population mean or proportion falls within a specific range of values, called the confidence interval. The confidence level is typically expressed as a percentage and is based on the level of certainty desired by the researcher or decision-maker.

A confidence interval is a range of values around a point estimate, such as a sample mean or proportion, that is likely to contain the true population parameter with a specified level of confidence. The confidence interval is constructed by taking the point estimate and adding and subtracting the margin of error, which is based on the standard error of the estimate and the desired level of confidence.

For example, if we estimate the mean height of a population to be 65 inches with a margin of error of 2 inches and a 95% confidence level, the confidence interval would be [63, 67]. This means that we are 95% confident that the true population mean height falls between 63 and 67 inches.

Learn more about statistical term

https://brainly.com/question/30761414

#SPJ4

If 400 g sample is composed of 100 g of cesium (Cs) and 300 g of iodine,  the percent by mass of I in the sample is 75%. So, correct option is D.

The percent by mass of iodine in the sample can be calculated by dividing the mass of iodine by the total mass of the sample and then multiplying by 100.

Mass of iodine = 300 g

Mass of cesium = 100 g

Total mass of sample = 300 g + 100 g = 400 g

Percent by mass of iodine = (mass of iodine / total mass of sample) x 100

= (300 g / 400 g) x 100

= 0.75 x 100

= 75%

Therefore, the correct answer is D. 75%. This means that 75% of the total mass of the sample is iodine. It is important to note that the percent by mass of cesium in the sample is 25% because the sum of the percent by mass of all components in a sample must equal 100%.

So, correct option is D.

To learn more about mass click on,

https://brainly.com/question/30310140

#SPJ1

The derivative of F(x) is F'(x) = 2x³ - 8x² + 4x.

A relation between a collection of inputs and outputs is known as a function. A function is, to put it simply, a relationship between inputs in which each input is connected to precisely one output.

To find the derivative of the given function F(x), we will apply the fundamental theorem of calculus and differentiate the integral with respect to x.

Let's compute F'(x):

F(x) = ∫[1 to x²] (t³ - 4t² + 2) dt

To differentiate the integral with respect to x, we'll use the Leibniz integral rule:

F'(x) = d/dx ∫[1 to x²] (t³ - 4t² + 2) dt

According to the Leibniz integral rule, we have to apply the chain rule to the upper limit of the integral.

F'(x) = (x²³ - 4x²² + 2) d(x²)/dx - (1³ - 4(1)² + 2) d(1)/dx   [applying the chain rule to the upper limit]

F'(x) = (x²³ - 4x²² + 2) (2x) - (1 - 4 + 2) (0)  [using the power rule for differentiation]

F'(x) = 2x(x²³ - 4x²² + 2)

F'(x) = 2x³ - 8x² + 4x

Therefore, the derivative of F(x) is F'(x) = 2x³ - 8x² + 4x.

Learn more about function on:

https://brainly.com/question/7693326

#SPJ4

cost of couch table is 732 and the cost of coffee table is 366

let the cost of coffe table is x

the cost of the couch=2×cost of coffe table

=2x

couch and coffe table=1098

2x+x=1098

3x =1098

x=366

2x=2×366=732

The organs of static equilibrium, also known as the maculae, are located within two expanded chambers within the vestibule called the utricle and saccule.

Utricle and saccule are filled with a gel-like substance containing tiny calcium carbonate crystals called otoliths. When the head moves, the otoliths shift and stimulate the hair cells within the maculae, which send signals to the brain regarding the body's position and movement. This allows us to maintain balance and stability, especially when standing still or moving in a straight line. Any disruptions or damage to the maculae can result in issues with balance, dizziness, and vertigo.

Learn more about static equilibrium here,

https://brainly.com/question/25727573

#SPJ4

i have no idea for answer

The sum of the squares of the first 5 terms in the Fibonacci sequence is equal to [tex]Fn - Fn+1[/tex] , but the result is not true for n[tex]= 6[/tex] .

The Fibonacci sequence is a sequence of numbers where each number is the sum of the two preceding numbers, starting from [tex]0[/tex] and [tex]1.[/tex]

To show that the sum of the squares of the first n terms in the Fibonacci sequence is equal to[tex]Fn - Fn+1[/tex], we can use mathematical induction.

Inductive step:

Assume that the result is true for some value of n, and consider the case where n [tex]= 5.[/tex]

[tex]0, 1, 1, 2, 3[/tex]

The fifth and sixth terms of the Fibonacci sequence are:

[tex]F5 = 5[/tex] and [tex]F6 = 8[/tex]

So,  for n = 5 is:

[tex]Fn - Fn+1[/tex]

[tex]F5 - F6 = 5 - 8 = -3[/tex]

We can also calculate[tex]Fn - Fn+1[/tex] for n = 6 using the values of F6 and F7:

[tex]F6 - F7 = 8 - 13 = -5[/tex]

So, we have:

[tex]Fn - Fn+1 = -F(n+1)[/tex]

[tex]15 = -3[/tex]

Which is not true, so the assumption that the result [tex]Fn - Fn+1,[/tex] is true for n = 5 leads to a contradiction. Therefore, we can conclude that the result is not true for n[tex]= 6[/tex].

Therefore, we have shown that the sum of the squares of the first [tex]5[/tex] terms in the Fibonacci sequence is equal to but the result is not true for n[tex]= 6.[/tex]

To know about sequence visit:

https://brainly.com/question/30262438

#SPJ4

The histogram that represents a set of data that is left-skewed is the one where the majority of the data is on the right side of the histogram, and the tail of the histogram extends to the left.

A left-skewed histogram is also called a negatively skewed histogram. In a left-skewed distribution, the majority of the data values are on the right side of the histogram, and the tail of the histogram extends to the left. This means that the data is clustered around higher values and gradually decreases as the values become smaller.

For example, imagine a dataset that represents the ages of a group of people. If most of the people in the group are young adults, but there are a few older individuals, the histogram would be left-skewed because the tail of the histogram (representing the older individuals) would extend to the left.

To know more about histogram,

https://brainly.com/question/30354484

#SPJ11

Answer:

cubic meter (m³)

Step-by-step explanation:

N/A

Ortiz would be paid $1056 for working 48 hours under the given pay rate of $22 per hour.

If Ortiz worked for 48 hours at a pay rate of $22 per hour, the calculation of his total earnings can be done by multiplying the number of hours worked by the hourly rate.

To calculate Ortiz's earnings for 48 hours, we multiply 48 by $22, which gives us a total of $1056.

Therefore, Ortiz would be paid $1056 for working 48 hours under the given pay rate of $22 per hour.

Learn more about pay rate,

brainly.com/question/13592880

#SPJ12

It is found that Ortiz paid $1056 for working 48 hours under the given pay rate of $22 per hour.

We are given that Ortiz worked for 48 hours at a pay rate of $22 per hour

Then the calculation of his total earnings could be done by multiplying the number of hours worked by the hourly rate.

To determine Ortiz's earnings for 48 hours, we multiply 48 by $22, that will gives us a total of $1056.

48 x 22 = 1056

Therefore, Ortiz will be paid 1056 dollars for working 48 hours under the  pay rate of $22 per hour.

Learn more about pay rate at ;

brainly.com/question/13592880

#SPJ12

The equation is true for any value of x! This means that no matter how many tools Victor gives to Ilay, the ratio of their tools will never be 3:4. Therefore, there is no solution to this problem.

Let's start by using algebra to represent the given information. Let's say that the number of tools Victor has is represented by the variable "v" and the number of tools Ilay has is represented by the variable "i".

According to the problem, we know two things:

The ratio of Victor's tools to Ilay's tools is 5:2, which can be written as:

v/i = 5/2

Victor has 42 more tools than Ilay, which can be written as:

v = i + 42

Now, we want to find how many tools Victor should give to Ilay so that the ratio becomes 3:4. Let's say that the amount of tools Victor gives to Ilay is represented by the variable "x".

After giving x tools to Ilay, Victor will have v-x tools, and Ilay will have i+x tools. We want to find the value of x that makes the ratio of v-x to i+x equal to 3:4.

So, we can set up the following equation:

(v-x)/(i+x) = 3/4

Now we can substitute the expression for v and the ratio of v/i to get an equation in terms of i and x:

(i+42-x)/(i+x) = 3/4

Next, we can cross-multiply to get rid of the denominators:

4(i+42-x) = 3(i+x)

Simplifying this equation:

4i + 168 - 4x = 3i + 3x

Combining like terms:

i = 7x - 168

Now we have an equation that relates the number of tools Ilay has to the number of tools Victor gives him. We can substitute this into the equation v=i+42 to get an equation that only involves x:

v = 7x - 126

Finally, we can use this equation to find the value of x that makes the ratio 3:4.

(v-x)/(i+x) = 3/4

(7x-126-x)/(i+x) = 3/4

6x-126 = (3/4)(i+x)

6x-126 = (3/4)(7x-168+x)

6x-126 = (3/4)(8x-168)

6x-126 = 6x - 126

To know more about ratio,

https://brainly.com/question/29467965

#SPJ11

Answer:

$391.2 per owner

Step-by-step explanation:

find the total price of the items and divide it by five

There are many natural objects that have two or more lines of symmetry. here are two examples:

Starfish - A starfish has five arms which can be equal in shape and size, and every arm has two lines of symmetry running down the length of the arm. this means that a starfish has a total of ten strains of symmetry, with every line bisecting two fingers.

Snowflakes - Snowflakes are intricate ice crystals which can have many strains of symmetry. the precise variety of lines of symmetry depends on the form of the snowflake.

However typically, a snowflake has as a minimum six traces of symmetry that bypass via its middle factor, creating six same hands. some snowflakes could have as many as twelve strains of symmetry, making them quite symmetrical and beautiful herbal objects.

Learn more about Starfish:-

https://brainly.com/question/31440158

#SPJ4

If 3 over 5 of the family income is spent on food, The amount spent on  food is $2118.6

If their total income is 3531 dollar and 3/5 is spend on food, we find the sum total of the amount of money spend on food by multiply the fraction or ratio to the total income the family gets monthly.

Therefore; Amount spent on food = monthly income x 3/5

It becomes $3531 x 3/5 or 3531 x 0.6

= $2118.6

It means that 2/5 of the income will be 2/5 x  $3531  = $1 412.4

$2118.6 + $1412.4 = 3531

Find more exercises on calculating amount spent;

https://brainly.com/question/25001541

#SPJ4

The equation of the perpendicular bisector of the line segment with endpoints (-1, -8) and (7, -2) is y = (-4/3)x - 1.

The perpendicular bisector of a line segment is the line that passes through the midpoint of the segment and is perpendicular to it. To find the midpoint of the segment with endpoints (-1, -8) and (7, -2), we can use the midpoint formula: ((x₁ + x₂)/2, (y₁ + y₂)/2)

By using given the values, we get :

((-1 + 7)/2, (-8 + (-2))/2)

= (3, -5)

So the midpoint is (3, -5).

To find the slope of the line segment connecting the two endpoints. We can use the slope formula: (y₂ - y₁)/(x₂ - x₁)

By using the given values, we get:

(-2 - (-8))/(7 - (-1))

= 6/8

= 3/4

So the slope of the line segment is 3/4.

To find the slope of the perpendicular bisector, we need to find the negative reciprocal of the slope of the line segment. The negative reciprocal of 3/4 is -4/3.

To find the equation of the line in point-slope form, we can use:

y - y₁ = m(x - x₁)

y - (-5) = (-4/3)(x - 3)

y + 5 = (-4/3)x + 4

y = (-4/3)x - 1

Therefore, the equation of the perpendicular bisector of the line segment with endpoints (-1, -8) and (7, -2) is y = (-4/3)x - 1.

To know more about Equation here

https://brainly.com/question/11408912

#SPJ4

There is sufficient evidence to conclude that the proportion of sales he makes to women is more than 75%.

At the 1% significance level, the critical value for a one-tailed test with 149 degrees of freedom is 2.326. Since the p-value of 0.0001 is much smaller than 0.01, we reject the null hypothesis that the proportion of sales made to women is equal to 0.75. Therefore, we can conclude that there is sufficient evidence to suggest that the proportion of sales made to women is more than 75%.

Note that we cannot conclude that the proportion of sales made to women is more than 50% because the null hypothesis assumes that the proportion is exactly 75%, not 50%. Furthermore, we have only tested the hypothesis that the proportion is greater than 75%, not whether it is greater than 50%. Therefore, the correct answer is: "There is sufficient evidence to conclude that the proportion of sales he makes to women is more than 75%."

To know more about hypothesis visit :

https://brainly.com/question/31319397

#SPJ4

Answer:

The line that appears to be tangent to circle S is not actually tangent.

[tex] \sqrt{ {14}^{2} + {19}^{2} } = \sqrt{196 + 361} = \sqrt{557} [/tex]

√557 is not equal to 25.

Answer:

  not a tangent

Step-by-step explanation:

You want to know if a segment 19 units long from a point 25 units from the center of a circle of radius 14 units is a tangent.

A tangent to a circle forms a right angle with the radius to the point of tangency. You can easily check to see if the triangle shown is a right triangle by using the Pythagorean theorem.

If the triangle is a right triangle the sum of the squares of the short sides is equal to the square of the hypotenuse:

  14² +19² = 25²

  196 +361 = 625

  557 = 625 . . . . . . . . false — not a right triangle; not a tangent

__

Additional comment

The attached figure is drawn to scale. It shows line QR intersects the circle in 2 places, so is not a tangent. The angle at Q is obtuse.

Given 3 sides of a triangle, you can classify it as acute, right, or obtuse using the "form factor" computed as follows. Form the sum of the squares of the two shorter sides, and subtract the square of the longer side:

  f = 14² +19² -25² = 196 +361 -625 = -68

The interpretation is ...

The correct expansion of (-4x + 9)² is 16x² - 72x + 81.

We have,

Step 1: Start with the expression (-4x + 9)².

Step 2: To expand this expression, we use the formula for the square of a binomial: (a - b)² = a² - 2ab + b².

Step 3: In this case, a is -4x and b is 9.

Applying the formula, we have:

(-4x + 9)² = (-4x)² - 2(-4x)(9) + (9)².

Step 4: Simplify each term in the expansion:

(-4x)² = 16x² (square the first term).

-2(-4x)(9) = 72x (multiply -2, -4x, and 9 together).

(9)² = 81 (square the second term).

Step 5: Combine the simplified terms:

(-4x + 9)² = 16x² - 72x + 81.

Thus,

The correct expansion of (-4x + 9)² is 16x² - 72x + 81.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ12