help me understand this math problem I need help asap pls help me .

Help Me Understand This Math Problem I Need Help Asap Pls Help Me .

Answers

Answer 1

Answer:

d

Step-by-step explanation:

the length of arc YPX is calculated as

YPX = circumference of circle × fraction of circle

the central angle of arc XY = 90° , then

central angle of arc YPX = 360° - 90° = 270°

YPX = 2πr × [tex]\frac{270}{360}[/tex] ( r is the radius )

       = 2π × 8 × [tex]\frac{3}{4}[/tex]

       = 16π × [tex]\frac{3}{4}[/tex]

       = 4π × 3

       = 12π m


Related Questions

compute the length of the curve ()=⟨−6,4 4,−5−3⟩ over the interval 0≤≤7. (use symbolic notation and fractions where needed.)

Answers

This integral may not have a simple closed-form solution. However, we can approximate the length using numerical methods such as numerical integration techniques or software tools like numerical integration libraries.

To compute the length of the curve described by r(t) = ⟨-6t, 4t^2, -5t - 3⟩ over the interval 0 ≤ t ≤ 7, we need to calculate the integral of the magnitude of the derivative of r(t) with respect to t.

The derivative of r(t) is given by:

r'(t) = ⟨-6, 8t, -5⟩

The magnitude of r'(t) is calculated as follows:

|r'(t)| = sqrt((-6)^2 + (8t)^2 + (-5)^2)

|r'(t)| = sqrt(36 + 64t^2 + 25)

|r'(t)| = sqrt(64t^2 + 61)

To find the length of the curve, we integrate the magnitude of r'(t) over the interval 0 to 7:

Length = ∫[0,7] |r'(t)| dt

Length = ∫[0,7] sqrt(64t^2 + 61) dt

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if the average number of nonconforming units is 1.6, what is the probability that a sample will contain 2 or less nonconforming units? use the poisson distribution.

Answers

The probability that a sample will contain 2 or fewer nonconforming units, using the Poisson distribution with an average of 1.6, is approximately 0.602.

To calculate the probability that a sample will contain 2 or fewer nonconforming units, we can use the Poisson distribution. The Poisson distribution is commonly used to model the probability of rare events occurring over a fixed interval or in a given sample.

The formula for the Poisson distribution is:

P(X = k) = (e^(-λ) * λ^k) / k!

where λ is the average number of

units.

In this case, the average number of nonconforming units is 1.6. We want to find the probability of having 2 or fewer nonconforming units, which means we need to calculate:

P(X ≤ 2) = P(X = 0) + P(X = 1) + P(X = 2)

Using the Poisson distribution formula, we can substitute the values:

P(X ≤ 2) = (e^(-1.6) * 1.6^0) / 0! + (e^(-1.6) * 1.6^1) / 1! + (e^(-1.6) * 1.6^2) / 2!

Calculating this expression, we find:

P(X ≤ 2) ≈ 0.602

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Decide whether the following statement makes sense​ (or is clearly​ true) or does not make sense​ (or is clearly​ false). Explain your reasoning.When Sally is​ depressed, she listens to music. I saw her today listening to​ music, so she must have been depressed.Question content area bottomPart 1Choose the correct answer below.A.The statement makes sense. Sally listens to music when she is depressed. If she is listening to​ music, then Sally must be depressed.  B.The statement makes sense. Sally listens to music when she is depressed. The statement clearly communicates that this is the only time Sally listens to music.C.The statement does not make sense. Sally listens to music when she is depressed. If she is listening to​ music, then Sally must not be depressed.  D.The statement does not make sense. Sally listens to music when she is​ depressed, but the statement does not clearly state that this is the only time Sally listens to music.

Answers

Based on the given statement, the correct answer would be:

option A. The statement makes sense. Sally listens to music when she is depressed. If she is listening to music, then Sally must be depressed.

The given statement is discussing a potential relationship between Sally's emotional state of being depressed and her behavior of listening to music. The question asks whether the statement makes sense, is clearly true, or does not make sense, and provides four options to choose from.

Option A states that the statement makes sense and suggests that if Sally is listening to music, then she must be depressed. This option is reasonable because the statement establishes a connection between Sally's depression and her behavior of listening to music. It implies that listening to music is a coping mechanism or an activity she engages in when she experiences depressive feelings.

Therefore, if someone observes Sally listening to music, it can be inferred that she might be in a depressed state at that moment.

On the other hand, options B and C can be eliminated because they make extreme and unsupported claims. Option B suggests that Sally only listens to music when she is depressed, which is not explicitly stated in the given statement. Option C states that if Sally is listening to music, then she must not be depressed, which contradicts the initial connection established between depression and listening to music in the statement.

Option D highlights the incomplete nature of the statement but does not render it entirely senseless. It acknowledges that the statement mentions Sally's behavior of listening to music when she is depressed but does not provide information about other potential reasons she might listen to music.

In summary, option A is the most appropriate choice as it aligns with the established correlation between Sally's depression and her listening to music, while considering the possibility of other reasons for her music listening behavior.

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the graph above represents position x versus time t for an object being acted on by a constant force. the average speed during the interval between 1 s and 2 s is most nearly]
(A) 2 m/s (B) 4 m/s (C) 5 m/s (D) 6 m/s (E) 8 m/s

Answers

The average speed during the interval between 1 second and 2 seconds is most nearly 8 m/s, which corresponds to option (E).

To determine the average speed during the interval between 1 second and 2 seconds, we need to find the displacement of the object during that time interval and divide it by the duration.

Looking at the graph, we can observe that the object's position increases from approximately 0 meters at 1 second to approximately 8 meters at 2 seconds.

Therefore, the displacement is 8 meters - 0 meters = 8 meters.

The duration of the time interval is 2 seconds - 1 second = 1 second.

To calculate the average speed, we divide the displacement by the duration:

Average speed = Displacement / Duration = 8 meters / 1 second = 8 m/s.

Therefore, the average speed during the interval between 1 second and 2 seconds is most nearly 8 m/s, which corresponds to option (E).

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write the equation in standard form of a line that passes through the point (4,-2) and has a slope of -1

Answers

standard form for a linear equation means

• all coefficients must be integers, no fractions

• only the constant on the right-hand-side

• all variables on the left-hand-side, sorted

• "x" must not have a negative coefficient

[tex](\stackrel{x_1}{4}~,~\stackrel{y_1}{-2})\hspace{10em} \stackrel{slope}{m} ~=~ - 1 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-2)}=\stackrel{m}{- 1}(x-\stackrel{x_1}{4}) \implies y +2 = - 1 ( x -4) \\\\\\ y+2=-x+4\implies y=-x+2\implies {\Large \begin{array}{llll} x+y=2 \end{array}}[/tex]

A pipe is constructed with dimensions as shown above. What is the volume of the solid portion of the
pipe? Round to the nearest tenth.

Answers

The required Volume of solid portion is  343.935 [tex]cm^3[/tex].

Given that, in cylinder, diameter of outer base circle = 7mm, diameter of inner base circle = 3mm and height of cylinder is 9mm.

To find the volume of the solid portion of the pipe, calculate the volume of the cylinder.

The formula for the volume of a cylinder is given by:

Volume = π x [tex]r^2[/tex] x h,

where r is the radius of the base circle and h is the height of the cylinder.

First,  find the radius of the outer base circle. The  radius is half of that:

Radius of outer base circle (r1 )= 7 mm / 2 = 3.5 mm.

Now,  find the radius of the inner base circle.  The radius is half of that:

Radius of inner base circle (r2) = 3 mm / 2 = 1.5 mm.

Calculate the volume of the cylinder by subtracting the volume of the inner cylinder from the volume of the outer cylinder:

Volume of solid portion = π x ([tex]r1^2[/tex] - [tex]r2^2[/tex]) x h,

where r2 is the radius of the outer base circle and r1 is the radius of the inner base circle.

Plugging in the values:

Volume of solid portion = π x ([tex](3.5)^2[/tex] - [tex](1.5)^2[/tex]) x 9.

Calculating this expression will give us the volume of the solid portion of the pipe.

Volume of solid portion = 3.14 x (12.25 - 2.25) x 9.

c = 343.935 [tex]cm^3[/tex].

Therefore, the required Volume of solid portion is  343.935 [tex]cm^3[/tex].

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∆ABC~∆DEF area of triangle abc is 64cm² and area of triangle DEF is 9cm². if AB is 16cm what is De?​

Answers

The measure of length of the triangle is x = 6 cm

Given data ,

∆ABC~∆DEF , since ∆ABC and ∆DEF are similar triangles, their corresponding sides are proportional.

The ratio of the areas of two similar triangles is equal to the square of the ratio of their corresponding sides.

Let's denote the length of DE as x.

Given:

Area of ∆ABC = 64 cm²

Area of ∆DEF = 9 cm²

AB = 16 cm

The ratio of the areas is:

(Area of ∆ABC) / (Area of ∆DEF) = 64 / 9

The ratio of the corresponding sides is:

AB / DE = 16 / x

(AB / DE)² = (Area of ∆ABC) / (Area of ∆DEF)

(16 / x)² = 64 / 9

Simplifying the equation:

256 / x² = 64 / 9

256 * 9 = 64 * x²

2304 = 64 * x²

Dividing by 64:

36 = x²

Taking the square root:

x = √36

x = 6

Hence , the length DE is equal to 6 cm.

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Please help . I will reward nicely

Answers

The information needed to show that triangle ABC is similar to triangle A'B'C' is the measure of angle B.

To show that triangle ABC is similar to triangle A'B'C', we need to demonstrate that all three corresponding pairs of angles have equal measures.

This means that we need to establish the following:

∠A = ∠A'

∠B = ∠B'

∠C = ∠C'

Given that ∠A = 100 degrees and ∠C = 45 degrees, we still need to know the measure of angle B to determine if the triangles are similar.

If the measure of angle B' is 35 degrees, then the triangles are NOT similar because the angles ∠B and ∠B' do not have equal measures.

For triangles to be similar, all corresponding pairs of angles must have equal measures.

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cabinets and cutout boxes shall have _ to accommodate all conductors installed in them without crowding

Answers

Answer: Yes

Step-by-step explanation:

Yes, you can run different system voltages in the same conduit and boxes. The conductors must be rated for the highest voltage present and used on all circuits.

You need to get final payment for the cabinets before they enter the home. then bill for the installation the day of instillation and collect the check before you leave if possible

No, once installed they become part of the house, you can not remove the kitchen cabinets or any other cabinets that have been installed without the consent of the home owner in writing. if you are a good contractor why would you have to take the kitchen cabinets out of the house anyway. But if you have to you can take the doors.

- Using what you found in part a, determine the length that Hailey needs to
extend the garden to have an area of 32 ft²

Answers

Hailey needs to extend her garden by 2 ft to achieve an area of 32 ft².  

To solve this problem, we need to find the additional length required to increase the garden's area from 24 ft² to 32 ft².

To determine the length Hailey needs to extend her garden, we can use the formula for the area of a rectangle, which is given by length multiplied by width.

Given that the width of Hailey's garden is 4 ft and the current area is 24 ft², we can set up the following equation.

Length [tex]\times[/tex] 4 = 24

To find the length, we divide both sides of the equation by 4:

Length = 24 / 4

Length = 6 ft.

Therefore, Hailey's garden currently has a length of 6 ft.

Now, to determine the length she needs to extend the garden to achieve an area of 32 ft², we subtract the current area from the desired area:

Additional Area = Desired Area - Current Area

Additional Area = 32 ft² - 24 ft²

Additional Area = 8 ft²

Since the width remains unchanged at 4 ft, the length she needs to extend the garden by is equal to the additional area divided by the width:

Length Extension = Additional Area / Width

Length Extension = 8 ft² / 4 ft

Length Extension = 2 ft.

Therefore, Hailey needs to extend her garden by 2 ft to achieve an area of 32 ft².

In conclusion, the length that Hailey needs to extend her garden to have an area of 32 ft² is 2 ft.

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The complete question may be like:

Question: Based on the information gathered in part a, determine the length that Hailey needs to extend her garden to achieve an area of 32 ft².

Context: Hailey has a rectangular garden with a fixed width of 4 ft. The current area of her garden is 24 ft².

the random variables x and y have the joint density f x y(x y)= x y00x y1 otherwiseA. Var (x)B. Var (y)C. COV (X,Y)D. P (X,Y)

Answers

The values of all sub-parts have been obtained.

(a) Var(x) = 11/144

(b) Var(y) = 11/144

(c) Cov(X, Y) = -1/144

(d) p(x,y) = -1/11.

What is Random Variables?

A random variable is a variable with an unknown value or a function that values each result of an experiment.

As given function is,

[tex]f_{XY}(x,y)= \left \{ {{(x+y) 0 < x < 1,0 < y < 1} \atop {(0) otherwise}} \right.[/tex]

Evaluate the value of integral as follows:

[tex]E(X)=\int\limits^1_0 {\int\limits^1_0 {xf(x,y)} \, dx } \, dy\\\\E(X)=\int\limits^1_0 {\int\limits^1_0 {x*(x+y)} \, dx } \, dy\\\\E(X)=7/12\\E(X)=E(Y)[/tex]

Since E(X) = E(Y).

Similarly,

[tex]E(X^2)=\int\limits^1_0 {\int\limits^1_0 {x^2f(x,y)} \, dx } \, dy\\\\E(X^2)=\int\limits^1_0 {\int\limits^1_0 {x^2(x+y)} \, dx } \, dy\\\\E(X^2)=5/12\\E(X^2)=E(Y^2)[/tex]

Since E(X²) = E(Y²).

Similarly,

[tex]E(X,Y)=\int\limits^1_0 {\int\limits^1_0 {xyf(x,y)} \, dx } \, dy\\\\E(X,Y)=\int\limits^1_0 {\int\limits^1_0 {xy*(x+y)} \, dx } \, dy\\ \\E(X,Y)=1/3[/tex]

(a) Simplify the value of Var(x):

Var(x) = E(X²) - (E(x))²

Var(x) = 5/12 - (7/12))²

Var(x) = 5/12 - 49/144

Var(x) = 11/144

(b) Simplify the value of Var(y):

As per obtained result [E(X) = E(Y)]. then

Var(y) = 11/144.

(c) Simplify the value of Cov(X, Y):

Cov(X, Y) = E (X, Y) - E(X) * E(Y)

Substitute values,

Cov(X, Y) = 1/3 - (7/12) * (7/12)

Cov(X, Y) = 1/3 - 49/144

Cov(X, Y) = -1/144

(d) Simplify the value of p(x,y):

p(x,y) = Cov(x,y)/sqrt(Var(x)*Var(y))

Substitute values,

p(x,y) = (-1/144)/(11/144)

p(x,y) = -1/11

Hence, the values of all sub-parts have been obtained.

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if p(x,3), q(7,-1) and pq=5 units find the possible value of x

Answers

Answer:

the possible values of x are:

x = 7 + √21

x = 7 - √21

Step-by-step explanation:

To find the possible value of x, we need to calculate the distance between points P(x, 3) and Q(7, -1) using the distance formula:

d(PQ) = √((x - 7)² + (3 - (-1))²) = 5

Simplifying the equation:

d(PQ) = √((x - 7)² + 4) = 5

Squaring both sides of the equation:

(x - 7)² + 4 = 25

Expanding the equation:

(x - 7)² = 25 - 4

(x - 7)² = 21

Taking the square root of both sides:

x - 7 = ±√21

Now we can solve for x:

x = 7 ± √21

Luna has 8 pints of juice. Michael has 2% times as many
pints of juice as Luna. A) How many pints of juice does Michael have?b) How many more pints of juice does Michael have than
Luna?Give your answers as whole numbers or as fractions in their simplest form

Answers

The 8 pints of juice Luna has and the amount Michael has which  is a multiple of the mixed fraction 2 3/4 and the amount Luna has indicates;

A) The amount of juice Michael has is 22 pint of juice

B) Michael has 14 more pint of juice than Luna

What is s fraction?

A fraction is a number that represents a part of an amount, and which can be represented by the quantity of the part over the quantity of the whole, with a division line in between the quantities.

Part of the question, obtained from a similar question on the internet includes;

Michael has 2 3/4 has many pints of Juice as Luna

A) The amount of juice Michael has obtained from the multiple of the amount of juice Luna has, which is 2 3/4 is therefore;

Michael has 2 3/4 × 8 pints of juice = 8 × 11/4 pint = 22 pint of juice

B) The amount of juice Michael has than Luna, ΔV is therefore;

ΔV = 22 pint - 8 pint = 14 pint

Michael has 14 more pint of juice than Luna

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Indicate the MOST appropriate measurement. The floor area in a small classroom is about: O 80 m² O 80 cm² 80 hm²

Answers

The most appropriate measurement for indicating the floor area in a small classroom is 80 m². The option O 80 m² accurately represents the floor area of the small classroom.

When measuring the floor area of indoor spaces like classrooms, square meters (m²) are commonly used as the unit of measurement. Square centimeters (cm²) would be too small of a unit for a classroom, and hectares (hm²) would be too large.

The option 80 m² accurately represents the floor area of the small classroom. It indicates an area of 80 square meters, which is a reasonable and commonly used unit for measuring indoor spaces. Therefore, the correct and most appropriate measurement is O 80 m².

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in a normal distribution, about how much of the distribution lies within two (2) standard deviations of the mean?a. 95%b. 90%c. 80%

Answers

Answer: a. 95%

In a normal distribution, about 95% of the distribution lies within two standard deviations of the mean.

Find the Taylor series for f(x) = ln(x), a = 9f(x) = ln(9) +centered at the given value of a. [Assume thatf has a power series expansion. Do not show thatRn(x) → 0.]f(x) = ln(9) +[infinity]n = 1Find the associated radius of convergence R.R =

Answers

the radius of convergence is R = 9.

To find the Taylor series for f(x) = ln(x) centered at a = 9, we can start by calculating the derivatives of f(x) and evaluating them at x = a.

f(x) = ln(x)

f'(x) = 1/x

f''(x) = -1/x^2

f'''(x) = 2/x^3

f''''(x) = -6/x^4

...

Now, let's evaluate these derivatives at x = a = 9:

f(9) = ln(9)

f'(9) = 1/9

f''(9) = -1/81

f'''(9) = 2/729

f''''(9) = -6/6561

...

The Taylor series for f(x) centered at a = 9 can be written as:

f(x) = f(9) + f'(9)(x-9) + f''(9)(x-9)^2/2! + f'''(9)(x-9)^3/3! + ...

Substituting the evaluated derivatives, we have:

f(x) = ln(9) + (1/9)(x-9) - (1/81)(x-9)^2/2! + (2/729)(x-9)^3/3! - ...

Simplifying the series, we get:

f(x) = ln(9) + (1/9)(x-9) - (1/2)(x-9)^2/81 + (1/3)(x-9)^3/729 - ...

The associated radius of convergence, R, can be found using the formula:

R = 1 / lim |a_n / a_(n+1)|,

where a_n is the coefficient of (x-9)^n in the Taylor series.

In this case, as the coefficients are constant multiples of the powers of (x-9), we can observe that the series converges for all x within a distance of 9 from the center a = 9.

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statisticians calculate the consumer price index by taking the 80,000 prices of individual products and combining them, using ______________ .

Answers

Statisticians calculate the Consumer Price Index (CPI) by combining the 80,000 prices of individual products using a weighted average based on their relative importance or expenditure weights.

The Consumer Price Index is a measure of the average change over time in the prices paid by urban consumers for a basket of goods and services. To calculate the CPI, statisticians collect price data for a representative sample of approximately 80,000 individual products that are commonly purchased by urban consumers. These products cover a wide range of categories, including food, housing, transportation, healthcare, and more.

Each product's price is then multiplied by its respective expenditure weight, which represents the proportion of total consumer spending allocated to that product. These weights are determined through surveys and data analysis to reflect the typical spending patterns of urban consumers. The resulting values are then summed up to obtain a total expenditure amount.

To calculate the CPI, statisticians divide the total expenditure by a base period expenditure and multiply the result by 100. The base period is typically a reference point or benchmark year against which the price changes are measured. This process allows for tracking and comparing price changes in the basket of goods and services over time, providing insight into inflation and changes in the cost of living.

In summary, statisticians calculate the Consumer Price Index by combining the prices of 80,000 individual products using a weighted average based on their expenditure weights, representing the relative importance of each product in urban consumers' spending patterns. This method allows for measuring and monitoring changes in the overall price level and cost of living.

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PLEASE HELP ASAP I PROMISE WHO EVER ANSWERS FIRST WILL GET BRAINLIEST BUT IT HAS TO BE THE RIGHT ANSWER THANKS

Answers

The experimental probability that his next flip will be heads is,

⇒ 3/5

⇒ 60%

We have to given that;

Luke conducted an experiment.

In each trial he flipped a coin and rolled a number cube that has sides labeled 1 to 6.

Hence, By given table of outcomes,

We get;

The experimental probability that his next flip will be heads is,

⇒ P = Number of times heads occur / Total outcomes

⇒ P = 3/5

⇒ P = 3/5 × 100%

⇒ P = 60%

Thus, The experimental probability that his next flip will be heads is,

⇒ 3/5

⇒ 60%

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Rewrite in logarithmic form
(P(5)xp(7)^1/3+7=17
(P(19)xP(6)^1/5-4=20
Anwsers should be logp(10)=4
Logp(24)=5
SHOW WORK
URGENT

Answers

To rewrite the given equations in logarithmic form, we need to recall the definition of logarithms. Logarithms represent the exponent to which a base is raised to produce a given value.

Using this information, we can rewrite the equations as follows:

P(5) * P(7)^(1/3) + 7 = 17

To rewrite this equation in logarithmic form, we can express it as:

logP(17 - 7) = logP(5) + logP(7)^(1/3)

Simplifying further, we have:

logP(10) = logP(5) + (1/3) * logP(7)

The equation in logarithmic form is logP(10) = logP(5) + (1/3) * logP(7).P(19) * P(6)^(1/5) - 4 = 20

Applying the same process, we can rewrite the equation as:

logP(20 + 4) = logP(19) + (1/5) * logP(6)

Simplifying further, we get:

logP(24) = logP(19) + (1/5) * logP(6)

Thus, the equation in logarithmic form is logP(24) = logP(19) + (1/5) * logP(6).

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ANCER QUICKLY PLEASE!!!

A B C D?!?

Answers

The result of subtracting 7x - 9 from 2x² - 11 is given as follows:

2x² - 7x - 2.

How to apply the subtraction operation?

The base term for the expression in this problem is given as follows:

2x² - 11.

The base term of the expression is subtracted by the term given as follows:

7x - 9.

Hence the subtraction operation is given as follows:

2x² - 11 - (7x - 9) = 2x² - 11 - 7x + 9.

Then we combine the like terms as follows:

2x² - 11 - 7x + 9 = -2x² - 7x - 2.

Meaning that the second option is the correct option in the context of the problem.

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A bucket contains 72 red crayons, 48 green crayons, 48 blue crayons, and 48 yellow crayons. The art teacher also has 120 peices of drawing paper. What is the largest number of identical kits the art teacher can make using all the crayons and
All of the paper

Answers

The art teacher can make a maximum of 24 identical kits using all the crayons and drawing paper for proper distribution.

To determine the largest number of identical kits the art teacher can make using all the crayons and drawing paper, we need to find the greatest common divisor (GCD) of the quantities.

The GCD represents the largest number that can divide all the quantities without leaving a remainder.

The GCD of the quantities of crayons can be found by considering the prime factorization:

[tex]72 = 2^3 * 3^2\\\\48 = 2^4 * 3\\\\48 = 2^4 * 3\\\\48 = 2^4 * 3\\\\[/tex]

The GCD of the crayons is [tex]2^3 * 3[/tex], which is 24.

Now, we need to find the GCD of the quantity of drawing paper:

120 = [tex]2^3 * 3 * 5[/tex]

The GCD of the drawing paper is also [tex]2^3 * 3[/tex], which is 24.

Since the GCD of both the crayons and drawing paper is 24, the art teacher can make a maximum of 24 identical kits using all the crayons and drawing paper.

Each kit would contain an equal distribution of crayons and drawing paper.

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Directions: Type your answer in the box.
The heights of 200 kindergarten students at T. E. Wright Elementary are normally distributed with a
mean of 40 inches and a standard deviation of 1.8 inches. Approximately how many students have a
height between 37.3 inches and 44.5 inches? Your answer must be in the form of a whole number.

Answers

Approximately 185 students have a height between 37.3 inches and 44.5 inches.

To find the number of students with a height between 37.3 inches and 44.5 inches, we can use the properties of the normal distribution.

First, we need to standardize the values using the z-score formula:

z = (x - μ) / σ

Where:

x = individual height

μ = mean height

σ = standard deviation

For the lower limit:

z1 = (37.3 - 40) / 1.8

z1 = -1.5

For the upper limit:

z2 = (44.5 - 40) / 1.8

z2 = 2.5

Next, we can use a standard normal distribution table (also known as a z-table) to find the proportion of values between -1.5 and 2.5. The proportion represents the area under the curve, which corresponds to the percentage of students with heights between the given range.

Looking up the z-scores in the z-table, we find the following values:

For z = -1.5, the cumulative probability is 0.0668 (approximately).

For z = 2.5, the cumulative probability is 0.9938 (approximately).

To find the proportion of values between -1.5 and 2.5, we subtract the cumulative probability of the lower limit from the cumulative probability of the upper limit:

Proportion = 0.9938 - 0.0668

Proportion ≈ 0.927

Finally, we multiply the proportion by the total number of students (200) to get the approximate number of students with heights between 37.3 inches and 44.5 inches:

Number of students = Proportion x Total number of students

Number of students ≈ 0.927 x 200

Number of students ≈ 185.4

Rounding to the nearest whole number, approximately 185 students have a height between 37.3 inches and 44.5 inches.

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Generally, the NEC® permits a fuse to carry ___ percent of its rating when it supplies a load that is not operated continuously.Select one:a. 100b. 80c. 50d. 125

Answers

Generally, the NEC® permits a fuse to carry 80 percent of its rating when it supplies a load that is not operated continuously. The correct option is b.

According to the National Electrical Code (NEC), a fuse is generally permitted to carry up to 80% of its rating when supplying a load that is not operated continuously. This provision is based on safety considerations and is intended to prevent the fuse from tripping prematurely during temporary or intermittent overloads.

Allowing a fuse to carry up to 80% of its rating ensures that it can handle short-term surges in current without blowing. This is important because many electrical devices and appliances draw higher currents when they are first turned on or during certain operations. Allowing the fuse to handle these temporary overloads helps avoid unnecessary interruptions in power supply.

By limiting the fuse to 80% of its rating, the NEC provides a safety margin. This margin accounts for factors such as variations in load characteristics, ambient temperature, and other operating conditions that may affect the actual current flowing through the fuse.

In summary, the NEC permits a fuse to carry up to 80% of its rating for non-continuous loads to accommodate temporary overloads while maintaining safety and reliability in electrical systems. Hence, b is the correct option.

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a researcher obtain a statistically significant r=-.91 when n=30. how would you report this?

Answers

A statistically significant negative correlation coefficient of r = -0.91 was obtained from a sample of n = 30. This indicates a strong and significant negative relationship between the variables.

The researcher conducted a correlation analysis and found a correlation coefficient (r) of -0.91, which indicates a strong negative relationship between the variables under investigation. The negative sign indicates that as one variable increases, the other variable tends to decrease, and vice versa.

The statistical significance of the correlation coefficient is crucial in determining whether the observed relationship is likely to be due to chance or if it truly exists in the population. In this case, the report should highlight that the obtained correlation coefficient is statistically significant.

To establish statistical significance, the researcher likely conducted a hypothesis test, such as a t-test or a permutation test, to determine the probability of obtaining a correlation coefficient as extreme as -0.91 under the null hypothesis of no correlation. Since the obtained correlation coefficient is statistically significant, it suggests that the observed negative relationship is unlikely to be a result of chance and provides evidence for a genuine association between the variables in the population from which the sample was drawn.

Reporting this finding is important for conveying the strength and significance of the negative relationship to the readers, providing valuable insights for further analysis and interpretation of the variables under investigation.

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the median of a data set with 179 values would be the average of the 89th and the 90th values when the data values are arranged in ascending order.T/F

Answers

Answer:

False

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

The median is the middle value of the data set.

If the data set has odd number of values (2n + 1) then the median is the value of the term with the number:

[(2n + 1) - 1]/2 = 2n/2 = n

In our case n would be:

(179 + 1)/2 = 180/2 = 90

Hence the given statement is False.

from the digits, 0,5,7,8 you form a 3-digit number without repeating digits. you od not include any numbers that start with 0. list all the outcomes of the sample space.

Answers

Answer:

507, 508, 570, 580, 578, 587, 875, 857, 805, 807, 850, 870, 750, 780, 708, 705, 758, 785

Step-by-step explanation:

Hope this helps, a brainliest would be much appreciated as this took a while lol

Solve for the missing variable.

A) 60 degrees
B) 105 degrees
C) 255 degrees
D) 90 Degrees

Answers

Answer:

B

Step-by-step explanation:

85+110+90=285

360-285=75

180-75=105

Therefore B = 105 degrees

Hope this helps

is the height of the curve for a given value of x; it is closely related to the probability of an observation falling in an interval around x.

Answers

The height of the curve for a given value of x is closely related to the probability of an observation falling in an interval around x.

How to find the probability?

The height of the curve, also known as the probability density function (PDF), represents the relative likelihood of different values occurring in a distribution. In probability theory, the area under the curve within a specific interval represents the probability of an observation falling within that interval.

Therefore, the height of the curve at a particular value of x reflects the probability of an observation being close to that value.

The concept of the PDF and its relationship to probability is fundamental in statistical analysis. By examining the height of the curve at different points, we can assess the likelihood of observing specific values or ranges of values.

This information is crucial for making inferences, estimating probabilities, and conducting hypothesis testing in various fields such as finance, biology, and social sciences.

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some one do this giving out 100 points
Complete the sentence: Squares and rectangles both have four ______ angles.
acute
obtuse
right
uneven

Answers

right

theres ur answer

So that AM:MB = 3:2 and N is the midpoint of

CM

If the area of △CNB is 35 in2, find the area of △CMB, △AMC, and △ABC

Answers

Area of △CMB ≈ 23.33 in² ,Area of △AMC ≈ 52.50 in²,Area of △ABC ≈ 75.83 in².

The problem step by step.

Given that AM:MB = 3:2, we can express the areas of triangles △CMB, △AMC, and △ABC in terms of their corresponding sides.

1. Area of △CNB = 35 in²

Since N is the midpoint of CM, we know that the ratio of the areas of △CNB and △CMB is the same as the ratio of their corresponding bases. Therefore, the area of △CMB can be determined as follows:

Area of △CMB = (2/3) * Area of △CNB = (2/3) * 35 = 70/3 in² ≈ 23.33 in²

2. Area of △AMC

Since AM:MB = 3:2, we can consider the area ratio as the square of the side ratio. Therefore, the area of △AMC can be determined as follows:

Area of △AMC = (3/2)² * Area of △CMB = (9/4) * (70/3) = 630/12 in² ≈ 52.50 in²

3. Area of △ABC

The area of △ABC can be obtained by summing the areas of △CMB and △AMC:

Area of △ABC = Area of △CMB + Area of △AMC = 70/3 + 630/12 = 280/12 + 630/12 = 910/12 in² ≈ 75.83 in²

To summarize:

Area of △CMB ≈ 23.33 in²

Area of △AMC ≈ 52.50 in²

Area of △ABC ≈ 75.83 in²

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