i need help its due in 2 hours

The p-value for a t-score of -0.92 is approximately 0.18 and since it is greater than the significant level, the null hypothesis is rejected.

The first step in testing this hypothesis is to calculate the test statistic, which in this case is a t-score. The formula for the t-score is (y - mu) / (s / sqrt(n)), where y is the sample mean, mu is the hypothesized population mean, s is the sample standard deviation, and n is the sample size.

In this case, the sample mean is 25.9, the hypothesized population mean is 26, the sample standard deviation is 7.6, and the sample size is 50. Plugging these values into the formula, we get a t-score of -0.92.

Next, we need to find the p-value associated with this t-score. We can use a t-table or a calculator to do this. Using a t-table with 49 degrees of freedom (since we have a sample size of 50 and one parameter estimated from the sample), we find that the p-value for a t-score of -0.92 is approximately 0.18.

Since the p-value is greater than the significance level of 0.05, we fail to reject the null hypothesis. In other words, we do not have substantial evidence to conclude that the population mean is less than 26. However, it is important to note that the sample mean is slightly below the hypothesized population mean, and the p-value is relatively close to the significance level. Therefore, it may be worthwhile to conduct additional studies with larger sample sizes or different populations to further investigate this question.

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The quotient of the division 3x⁴ + 20x³ + 14x² + 17x + 30 ÷ x + 6 is 3x³ + 2x² + 6x - 19

The quotient expression is given as

3x⁴ + 20x³ + 14x² + 17x + 30 ÷ x + 6

The long division expression is represented as

x + 6 | 3x⁴ + 20x³ + 14x² + 17x + 30

So, we have the following division process

           3x³ + 2x² + 6x - 19

x + 6 | 3x⁴ + 20x³ + 14x² + 17x + 30

          3x⁴ + 18x³

         --------------------------------

                    2x³ + 14x² + 17x + 30

                    2x³ + 12x²

         -------------------------------------

                                 6x² + 17x + 30

                                 6x² + 36x

         -------------------------------------

                                            -19x + 30

                                            -19x - 114

         -------------------------------------

                                                       134

Hence, the quotient of the long division is 3x³ + 2x² + 6x - 19

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The answer should be

2x³ + 14x² + 17x + 30

The bicycle mechanic should cut a strip of plastic approximately 82 inches long to place between the tube and tire of the 26-inch diameter bicycle tire.

To calculate the length of the strip of plastic needed, we first need to determine the circumference of the tire. The formula for the circumference of a circle is C=2πr, where C is the circumference, π is approximately 3.14, and r is the radius of the circle.

In this case, the tire diameter is 26 inches, so the radius is 13 inches (half of the diameter). Therefore, the circumference of the tire is: C = 2πr = 2π(13)     = 81.64 inches (rounded to two decimal places)

To ensure that the strip of plastic fits snugly between the tube and tire, it should be the same length as the circumference of the tire. Therefore, the strip of plastic should be 82 inches long (rounded to the nearest inch).

In summary, the bicycle mechanic should cut a strip of plastic that is 82 inches long to fit between the tube and tire of the 26-inch diameter bicycle tire.

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The spindle speed for a cut taken with a 4-inch high-speed drill and a cutting speed of 30 feet per minute is approximately 35.1 revolutions per minute.

Speed is a measure of how fast an object is moving. It is usually measured in units of distance per unit time, such as miles per hour or meters per second. Speed is an important concept in physics, engineering, and everyday life

We can use the formula for spindle speed that relates spindle speed to cutting speed and tool diameter:

S = (C × 12) / (π × D)

where S is spindle speed, C is cutting speed in feet per minute, D is tool diameter in inches, and π is the mathematical constant pi.

We know that for a 3-inch high-speed drill with a cutting speed of 70 feet per minute, the spindle speed is 88.2 revolutions per minute. We can use this information to solve for the constant of proportionality k:

88.2 = (70 × 12) / (π × 3)

k = 88.2 × (π × 3) / (70 × 12)

k ≈ 0.0039

Now we can use the value of k to find the spindle speed for a 4-inch high-speed drill with a cutting speed of 30 feet per minute:

S = k × C × 12 / D

S = 0.0039 × 30 × 12 / 4

S = 35.1

Therefore, the spindle speed for a cut taken with a 4-inch high-speed drill and a cutting speed of 30 feet per minute is approximately 35.1 revolutions per minute.

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The plant's height at 12 months would be 38 inches.

Assuming the plant's height follows a linear pattern, Robin can use the equation y = mx + b, where y is the height of the plant, x is the number of months, m is the slope or rate of growth, and b is the y-intercept or initial height.

To find the equation, Robin can use the data from the three months:

Using these data points, Robin can calculate the slope m:

m = (11-5)/(3-1) = 3 inches/month

Then, using the point-slope form of the equation, Robin can find the y-intercept b:

y - 5 = 3(x - 1)

y = 3x + 2

Therefore, the algebraic expression to find the plant's height for any month x is y = 3x + 2.

To find the plant's height at 12 months, Robin can substitute x = 12 into the equation:

y = 3(12) + 2 = 38 inches

So the plant's height at 12 months would be 38 inches.

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Answer:

(4),(3),(1),(2),(2),(1)

Step-by-step explanation:

Mnemonic to memorize trigonometric ratios: SOH CAH TOA

(S=O/H C=A/H T=O/A)

Sine, Cosine, Tangent, Opposite to x, Adjacent to x, Hypotenuse

Cosecant = 1/Sine, Secant = 1/Cosine, Cotangent = 1/Tangent

The amount in millimeters of lace they have left after finishing the quilts is 400 millimeters.

Determine how much lace is needed for each quilt. Each quilt has a perimeter that we need to cover with lace. The perimeter is the sum of all sides of a rectangle, which is (2 x width) + (2 x length).

Each quilt is 2.2 meters wide and 2.7 meters long. So, the perimeter of one quilt is (2 x 2.2) + (2 x 2.7) = 4.4 + 5.4 = 9.8 meters.

Since there are 2 quilts, the total lace needed for both quilts is 9.8 meters x 2 = 19.6 meters.

They bought a 20-meter roll of lace. To find out how much lace is left, subtract the total lace used from the initial length of the roll: 20 meters - 19.6 meters = 0.4 meters.

To convert this to millimeters, multiply by 1,000: 0.4 meters x 1,000 = 400 millimeters.

So, Franklin and his aunt have 400 millimeters of lace left after finishing the quilts.

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The coordinates of the images after the translation are K' (-4, 6).

To find the image coordinates of K', we need to translate the coordinates of K 6 units up.

This can be done by adding 6 to the y-coordinate of K.

So, the y-coordinate of K' will be:

y-coordinate of K' = y-coordinate of K + 6

= 0 + 6

= 6

To find the x-coordinate of K', we just need to keep the x-coordinate of K the same, since the translation is only in the vertical direction.

Therefore, the image coordinates of K' are (-4, 6).

So, the correct answer is C. K′(−4, 6).

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The total number of problems he solved is 36 if after completion of 27 problems he has completed 75% of the assignments.

Percentage of completion = 75 % of the work

The percentage can be converted to decimal by dividing the percentage by 100.

Thus, the part that has been completed = 75% = 0.75 of the work

The number of questions done = 27

Let the total number of questions be x

Thus, 75% of x is given as 27

75% of x = 27

0.75 * x = 27

0.75x = 27

x = 27/0.75

x = 36

Thus, the total number of questions is 36.

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Deion increased the distance he ran by 20%.

To discover the percentage increase within the distance Deion ran, we need to first calculate the amount of increase.

The increase in distance that Deion ran this week compared to final week is:

6.4 miles

To find the proportion increase, we need to divide the increase by means of the original value (the distance he ran last week),

Then multiply by using a hundred to express the result as a percent.

The original price (last week's distance) is:

32 miles

Therefore, the percentage increase within the distance he ran is:

(6.4 miles / 32 miles) x 100% = 20%

So, Deion increased the distance he ran by 20%.

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The unit price in dollars per centimeter is 80 cents.

:: Total wire length = 19.5 cm

:: Total amount paid = $15.60

Per unit price = [ (total amount paid) / (total wire length) ]

Per unit price = (15.60 / 19.5) $/cm

Per unit price = 0.8 ($/cm)

And as we know, $1 = 100 cents,

So,

$0.8 = 0.8 x 100 cents = 80 cents.

Therefore, the unit price in dollars per centimeter is 80 cents.

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We can plot the points (1,8), (2,6), (3,2), and (4,1) on a graph by using a coordinate plane and the x and y-coordinates of each point.

To plot these points, we will use a coordinate plane, which is a two-dimensional graph with an x-axis and a y-axis. The x-axis represents the horizontal position, and the y-axis represents the vertical position. We will use the x-coordinate to determine the horizontal position of the point and the y-coordinate to determine the vertical position of the point.

For the first point, (1,8), we will start at the origin of the graph, which is the point (0,0). We will then move 1 unit to the right along the x-axis and 8 units up along the y-axis to plot the point.

For the second point, (2,6), we will start again at the origin and move 2 units to the right along the x-axis and 6 units up along the y-axis to plot the point.

We will repeat this process for the remaining points, (3,2) and (4,1), to plot all four points on the graph. Once all four points are plotted, we can connect them with a line to visualize the pattern of the ball's bounces.

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Complete Question:

Sara drops a tennis ball and lets it bounce. She records the height of the ball after each of its bounces as an ordered pair, where x represents the number of bounces and y represents the height of the ball in inches.

The ordered pairs she records are (1,8), (2,6), (3,2) and (4,1).

Plot the ordered points on the graph.

Answer:

Step-by-step explanation:

Find area of all shapes and add

A(biggest rectangle) = Lw =  6*3 =18   there are 2 of those A=36

A(long skinny rectangle = Lw = 2*6 =12  there are 2 of those A=24

A(smallest) = Lw = 2*3=6 there are 2 of those A=12

Add it all up

A=36+24+12 = 72

I checked it 5 times.  I keep getting 72

Answer:

Step-by-step explanation:

(3√27)^4 = (3^1/3 * 3^3/2)^4 = (3^5/2)^4 = 3^10 = 59049

So the equivalent expression is not listed among the given options.

The approximate volume of the cylinder with a diameter of 14cm and height of 49cm is 10780.78 cubic centimeters, calculated using the formula V=πr²h.

To calculate the volume of a cylinder, we use the formula

Volume = πr²h

where π is pi, r is the radius of the cylinder, h is the height of the cylinder.

We are given the diameter of the cylinder, which is 14 cm. The radius of the cylinder is half of the diameter, so

radius = diameter / 2 = 14 cm / 2 = 7 cm

The height of the cylinder is given as 49 cm.

Now we can use the formula to find the volume of the cylinder

Volume = πr²h = 3.14 x 7² x 49 = 10780.78 cubic centimeters (rounded to two decimal places)

Therefore, the approximate volume of the cylinder is 10780.78 cubic centimeters.

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--The given question is incomplete, the complete question is given

" What is the approximate volume of the cylinder? when diameter is 14cm height is 49cm (Use 3. 14 as an approximation of pi. )"--

The height of the candle after x hours is given by the equation y = 2x + 14.

Let's first convert the time interval to hours. There are 60 minutes in an hour, so 30 minutes is equivalent to 0.5 hours.

After x hours, the candle will have burned down by 2x inches (since it burns 1 inch every 0.5 hours).

If y is the total height of the candle, then we can write the equation:

y - 2x = 14

We can solve for y:

y = 2x + 14

So the height of the candle after x hours is given by the equation y = 2x + 14.

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Answer:

Step-by-step explanation:

You want the measures of the angles where lines cross if the sum of three of them is 280°.

Angle b and c form a linear pair, so ...

  b + c = 180°

Substituting that into the given equation, we have ...

  b + c + d = 280°

  180° + d = 280°

  d = 100°

Angles in this figure that do not share a side are vertical angles, hence congruent.

  b = d = 100°

  c = 180° -b = 180° -100° = 80° . . . . using the linear pair relation

  a = c = 80°

The solution to the inequality given is false.

To determine whether x = 5 is a solution of the inequality x + 3 > 12, we substitute x = 5 into the inequality and see if the resulting statement is true or false:

5 + 3 > 12

8 > 12

In this case, when we substitute x = 5 into the inequality, we get the statement 5 + 3 > 12, which simplifies to 8 > 12. This statement is false, since 8 is not greater than 12. Therefore, x = 5 is not a solution of the inequality x + 3 > 12.

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The full question is:

Tell whether the given value is a solution of the inequality X + 3 > 12; x = 5

The selling price of the necklace at the store is $32.64.

To calculate the selling price of the necklace, we will first find the markup amount and then add it to the original cost.

Markup = (Original Cost) x (Markup Percentage)
Markup = $24 x 36% = $24 x 0.36 = $8.64

Now, add the markup amount to the original cost to find the selling price:

Selling Price = Original Cost + Markup
Selling Price = $24 + $8.64 = $32.64

So, the selling price of the necklace at the store is $32.64.

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Step-by-step explanation:

1kL = 100 dal

x = 470 dal .... you will criss cross it

1 kl × 470 dal = x ×100dal

470 dal kl = 100dal x ... then you will divide 100 dal from both side

4.7 kl = x

x = 4.7 kl

so our result is 4.7kl which is equal to 470 dal

Step-by-step explanation:

470 dal = 4.7 kl

because 1 kl = 100 dal

[tex] \frac{1}{x} = \frac{100}{470} \\ \\ 100x = 470 \\ x = \frac{470}{100} \\ x = 4.7[/tex]

The correct response is 12, as finding the predicted smoking and asbestos exposure group requires finding x, and in that case, the ratios in the rows and columns are equal.

4/2 = x/6 Or 6/2= x/4

This suggests that x = 12.

Smoking refers to the act of inhaling and exhaling the smoke produced by burning tobacco or other substances such as marijuana or hookah. It is a highly addictive habit that poses significant health risks to both smokers and those exposed to secondhand smoke. Smoking can lead to a variety of illnesses and diseases, including lung cancer, heart disease, stroke, chronic obstructive pulmonary disease (COPD), and various other cancers. It is estimated that smoking is responsible for nearly 8 million deaths globally each year.

The chemicals in tobacco smoke can also harm the environment, contributing to air pollution and litter. Despite the well-known risks associated with smoking, many people continue to smoke due to addiction, peer pressure, or a lack of understanding about the long-term consequences.

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- If the equation is overdamped, b ∈ (-∞, -2√6) ∪ (2√6, ∞).
- If the equation is underdamped, b ∈ (-2√6, 2√6).
- If the equation is critically damped, b ∈ {-2√6, 2√6}.

To determine the behavior of the solution for the given differential equation s′′ + bs′ + 6s = 0, we need to analyze the roots of the characteristic equation:

r^2 + br + 6 = 0

For this quadratic equation, the discriminant Δ is given by:

Δ = b^2 - 4(1)(6) = b^2 - 24

The behavior of the solution depends on the value of Δ:

1. Overdamped: If Δ > 0, the solution will be overdamped.
2. Underdamped: If Δ < 0, the solution will be underdamped.
3. Critically damped: If Δ = 0, the solution will be critically damped.

Now, we find the intervals of b for each case:

1. Overdamped (Δ > 0):
b^2 - 24 > 0
This inequality holds for b ∈ (-∞, -2√6) ∪ (2√6, ∞).

2. Underdamped (Δ < 0):
b^2 - 24 < 0
This inequality holds for b ∈ (-2√6, 2√6).

3. Critically damped (Δ = 0):
b^2 - 24 = 0
This equation holds for b = -2√6 and b = 2√6.

In conclusion:
- If the equation is overdamped, b ∈ (-∞, -2√6) ∪ (2√6, ∞).
- If the equation is underdamped, b ∈ (-2√6, 2√6).
- If the equation is critically damped, b ∈ {-2√6, 2√6}.

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The location of point B is (4, −2). So the answer is (4, −2).

To find the location of point B, we can use the midpoint formula, which states that the coordinates of the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) are:

((x1 + x2)/2, (y1 + y2)/2)

In this case, we know that point M is the midpoint of segment AB, and we know the coordinates of point M. We also know the coordinates of point A. So we can use the midpoint formula to solve for the coordinates of point B.

Let's call the coordinates of point B (x, y). We know that point M is the midpoint of segment AB, so we can set up the following equation:

((−2 + x)/2, (2 + y)/2) = (1, 0)

Simplifying this equation, we get:

(−2 + x)/2 = 1 and (2 + y)/2 = 0

Solving for x and y, we get:

x = 4 and y = −2

Therefore, the location of point B is (4, −2). So the answer is (4, −2).

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Answer:

3

Step-by-step explanation:

2x2=4

4x2=8

8x2=16

The cost of two oranges is 1.1 dollars.

One Sunday, Cory bought 4 apples and 6 oranges and paid $5.10. Dalia bought 2 apples and 5 oranges and paid $3.65.

Therefore, using equation,

let

x = cost of each apples

y = cost of each oranges

Hence,

4x + 6y = 5.10

2x + 5y = 3.65

Multiply equation(ii) by 2

4x + 6y = 5.10

4x + 10y = 7.3

4y = 2.2

y = 2.2 / 4

y = 0.55 dollars

Therefore,

cost of 2 oranges = 0.55(2) = 1.1 dollars

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Answer:

Step-by-step explanation:

We can use the Pythagorean theorem to solve this problem. Let's call the length of the ladder "L". The ladder, the wall of the house, and the ground form a right triangle. The distance between the ladder and the house is the base of the triangle, which is 15 feet. The height of the triangle is the distance from the ground to the spotlight, which is 20 feet. The length of the ladder is the hypotenuse of the triangle.

Using the Pythagorean theorem, we have:

L^2 = 15^2 + 20^2

L^2 = 225 + 400

L^2 = 625

L = sqrt(625)

L = 25

Therefore, a ladder of at least 25 feet is needed for the electrician to reach the place where the light is mounted.

As a result, the angle formed by Luis's backpack and the ground is roughly 53 degrees (rounded to the nearest degree).

A function in mathematics is a relationship between a set of potential outputs and a number of potential inputs, with the feature that each input is associated to only one possible output. It is a principle or set of guidelines that allots a different output value towards each input value. Equations, graphs, and tables are frequently used to depict functions in order to explain how the output changes as the input does. They are employed to express relationships between various quantities, such as the length of time it takes for an automobile to drive a certain distance or the height of an object in relation to its weight. The concept of a function is crucial to many departments of science and math, and it is widely applied in areas like engineering,

given

We can use trigonometry to determine the angle that Luis's backpack creates with the ground.

Consider the backpack's handle to represent the hypotenuse of a right triangle, with the vertical leg being Luis's hand's distance from the ground (3 feet) and the horizontal leg being the backpack's height (3.5 feet).

The angle can be determined using the inverse tangent function (tan-1):

53.13 degrees at tan-1(3.5/3)

As a result, the angle formed by Luis's backpack and the ground is roughly 53 degrees (rounded to the nearest degree).

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The 90% confidence interval for the amount of time that teens spend online each week is (30.761, 32.839) hours

To find the 90% confidence interval for the amount of time that teens spend online each week, we can use the following formula

CI = x ± z*(σ/√n)

where

x is the sample mean

σ is the population standard deviation

n is the sample size

z is the z-score associated with the desired confidence level

In this case, we have

x = 31.8 hours

σ = 5.91 hours

n = 85

z = 1.645 (for a 90% confidence level, using a z-table or calculator)

Plugging in these values, we get

CI = 31.8 ± 1.645*(5.91/√85)

Simplifying, we get

CI = 31.8 ± 1.039

We can interpret this interval as saying that if we were to take many random samples of 85 teens and compute the confidence interval for each sample, about 90% of these intervals would contain the true population mean.

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The volume of the larger cone will be 48 cm³.

This is because when a shape is enlarged by a scale factor of 2, the volume is increased by a factor of 2³ (or 8). So, 6 x 8 = 48.


When we enlarge a shape by a scale factor, we are multiplying all of its dimensions by that factor. In the case of a cone, this means that we are increasing the radius and the height of the cone by a factor of 2.

We can use the formula for the volume of a cone to find out how the volume changes when we enlarge it. The formula for the volume of a cone is V = (1/3)πr²h, where r is the radius and h is the height.

If we multiply the radius and the height of the cone by 2, we get a new cone with a radius of 2r and a height of 2h. Plugging these new values into the formula for the volume of a cone, we get:

V' = (1/3)π(2r)²(2h) = (1/3)π(4r²)(2h) = (8/3)πr²h

We can simplify this expression by multiplying the original volume by 8/3:

V' = (8/3) x 6 = 48

So the volume of the larger cone is 48 cubic centimeters.

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