A teacher asks her students to write down the number of hours studied, rounded to the nearest half hour. She compiles the results and develops the probability distribution below for a randomly selected student. What is the mean of the probability distribution?

Probability Distribution
Hours Studied: X
Probability: P(X)
0.5
0.07
1
0.2
1.5
0.46
2
0.2
2.5
0.07

0.20
0.46
0.85
1.50

Answer:

55.9%

Step-by-step explanation:

To find the percentage of girls in the class, we can use the following formula:

Percentage = (Number of girls / Total number of students) * 100

Number of girls = 19

Total number of students = 34

Percentage = (19 / 34) * 100

                   = 55.88235 % ≈ 55.9 % ( rounded off to one decimal place)

Answer:  What the hell is this. I don’t understand a word

Step-by-step explanation:

15 km of walkway still need to be paved after 4 days. There are still 12 miles of trail to be paved after another 6 days. The average rate of the change is 24.

Given that,

The paving of a bike route by a city. Every day, the same amount of the path is paved. 15 km of walkway still need to be paved after 4 days. There are still 12 miles of trail to be paved after another 6 days.

We have to find the average change rate.

1st we find the slope with the points (4,15) and (6,12).

Slope =\(\frac{y_{2} -y_{1} }{x_{2} -x_{1} }\)

Slope=\(\frac{12-15}{6-2}\)

Slope=-3/4

Now,

y=mx+b

15=-3/4(4)+b

b=15+3

b=18

We got the equation of line as y=-3/4x+18

Now take y=0

0=-3/4x+18

-3/4x=-18

x=(18×4)/3

x=72/3

x=24

Therefore, the average rate of the change is 24.

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Answer:

corresponding angles

Step-by-step explanation:

x and y are in the same position in relation to the lines.  They are to the right of the transversal and above the horizontal lines.

This means they are corresponding angles

Answer:

Use the distance formula to determine the distance between two points.

Exact Form:

√ 82

Decimal Form:

9.05538513

…

Step-by-step explanation:

Answers:

He has  27   quarters and  31   dimes

=========================================================

Work Shown:

d = number of dimes

q = number of quarters

d+q = 58 since there are 58 coins of only these two types

d = 58-q

10d+25q = 985 .... note that 985 cents is $9.85

10(58-q)+25q = 985 .... replace d with 58-q

580-10q+25q = 985

15q+580 = 985

15q = 985-580

15q = 405

q = 405/15

q = 27 ..... Mike has 27 quarters

d = 58-q

d = 58-27

d = 31 .... Mike also has 31 dimes

-----------

As a way to check:

d+q = 31+27 = 58 so that works out

and

10d+25q = 10*31+25*27 = 310+675 = 985

so that works out as well. The answer is confirmed.

a). We have proved all the given conditions.

b). It is true that condition 3 holds for all regular languages L1 and L2.

(a) Regular languages L1 and L2 can be suggested as follows:

Let \(L_1={0^{(n+1)} | n\geq 0}\)

and

\(L_2={1^{(n+1)} | n\geq 0}\)

We have to prove three conditions:1. L1 ⊈ L2:

The given languages L1 and L2 both are regular but L1 does not contain any string that starts with 1.

Therefore, L1 and L2 are distinct.2. L2  L1:

The given languages L1 and L2 both are regular but L2 does not contain any string that starts with 0.

Therefore, L2 and L1 are distinct.3. (L1 ∪ L2)* = L1* ∪ L2*:

For proving this condition, we need to prove two things:

First, we need to prove that (L1 ∪ L2)* ⊆ L1* ∪ L2*.

It is clear that every string in L1* or L2* belongs to (L1 ∪ L2)*.

Thus, we have L1* ⊆ (L1 ∪ L2)* and L2* ⊆ (L1 ∪ L2)*.

Therefore, L1* ∪ L2* ⊆ (L1 ∪ L2)*.

Second, we need to prove that L1* ∪ L2* ⊆ (L1 ∪ L2)*.

Every string that belongs to L1* or L2* also belongs to (L1 ∪ L2)*.

Thus, we have L1* ∪ L2* ⊆ (L1 ∪ L2)*.

Therefore, (L1 ∪ L2)* = L1* ∪ L2*.

Therefore, we have proved all the given conditions.

(b)It is true that condition 3 holds for all regular languages L1 and L2.

This can be proved by using the fact that the union of regular languages is also a regular language and the Kleene star of a regular language is also a regular language.

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Answer:

This geometric series is convergent:

\( \frac{10}{1 - ( - \frac{1}{5}) } = \frac{10}{ \frac{6}{5} } = 10( \frac{5}{6} ) = \frac{25}{3} = 8 \frac{1}{3} \)

The geometric series 10 - 2 + 0.4 - 0.08 + ... is convergent.

To determine if the geometric series 10 - 2 + 0.4 - 0.08 + ... is convergent or divergent, we need to examine the common ratio (r) between consecutive terms.

The common ratio (r) can be found by dividing any term by its preceding term.

Let's calculate it:

r = (-2) ÷ 10 = -0.2

r = 0.4 ÷ (-2) = -0.2

r = (-0.08) ÷ 0.4 = -0.2

In this series, the common ratio (r) is -0.2.

For a geometric series to be convergent, the absolute value of the common ratio (|r|) must be less than 1. If |r| ≥ 1, the series is divergent.

In this case, |r| = |-0.2| = 0.2 < 1.

Since the absolute value of the common ratio is less than 1, the geometric series 10 - 2 + 0.4 - 0.08 + ... is convergent.

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Hello!

1/6 ≈ 0.167

the answer is 0.167

Answer:

- "stars that shine" --> alliteration

- "never-ending line" --> hyperbole

- "dances with the daffodils" --> personification

Step-by-step explanation:

- "stars that shine" --> alliteration since both stars and shine start with the 's' sound

- "never-ending line" --> hyperbole since never ending is an exaggeration

- "dances with the daffodils" --> personification since your heart (from the prev line) dances, hence personifies your heart as a human being that dances, or could also be interpreted as the daffodils dancing with you heart, also showing personification.

Answer:

2.4

Step-by-step explanation:

Answer:

2.4

Step-by-step explanation:

Since 7.3 is negative then 9.7+-7.3 is equal

9.7 - 7.3=2.4

Answer:

1 out of 5  or 20% chance

Step-by-step explanation:

Answer:

9.21954445729

Step-by-step explanation:

A^2 + B^2 = C^2

7^2 = 6^2 = 85

The square root of 85 is...

9.21954445729

Well based on the info given I’d say you would expect to see about 14 more.

\( \boxed{\bf{Surface\:Area\:of\:Cone}} \)

\( \begin{aligned}SA&=\pi \: r(s + r) \\&=3.14 \times 12 \times (26.8 + 12) \\ &=37.68 \times 38.8 \\&= \bold{ \underline{1461.984 \: ft ^{2} }} \end{aligned}\)

\( \small{\blue{\mathfrak{That's\:it\: :)}}} \)

Option D, "We cannot say whether the completion of full practice schedules changed because the sample is of only 200 marathon runners," is incorrect.

The participation in full practice schedules demonstrated a statistically significant decrease between March 2018 and March 2019. A random sample of 200 marathon runners was surveyed in March 2018 and March 2019 to determine how often they did a full practice schedule in the week before their scheduled marathon.

In the March 2018 survey, 75%(95%Cl70−77%) of the sample did not complete a full practice schedule in the week before their scheduled marathon.

A year later, in March 2019, the same sample group was surveyed, and 61%(95%Cl57−64%) stated that they did not run a full practice schedule in the week before their competition.

The results suggest that participation in full practice schedules has decreased significantly between March 2018 and March 2019.

The reason why we know that there was a statistically significant decrease is that the confidence interval for the 2019 survey did not overlap with the confidence interval for the 2018 survey.

Because the confidence intervals do not overlap, we can conclude that there was a significant change in the completion of full practice schedules between March 2018 and March 2019.

Therefore, option C, "The participation in full practice schedules demonstrated a statistically significant decrease between March 2018 and March 2019," is the correct answer.

The sample size of 200 marathon runners is adequate to draw a conclusion since the sample was drawn at random. Therefore, option D, "We cannot say whether the completion of full practice schedules changed because the sample is of only 200 marathon runners," is incorrect.

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Geometric solids with circular cross-sections include cylinders, cones, and spheres. Geometric solids with circular cross-sections include cylinders, cones, and spheres. And Cylinders, cones, and spheres can be created by rotating a two-dimensional shape about an axis.

1. Cylinder: A cylinder is a 3-dimensional solid that has two parallel circular bases connected by a curved surface. Cylinders are commonly found in everyday objects like soda cans and water bottles.

2. Cone: A cone is a 3-dimensional solid that has a circular base and a curved surface that tapers to a point. Cones are often used in architecture, like on the top of a church steeple.

3. Sphere: A sphere is a 3-dimensional solid that has a circular shape in all directions. Spheres are found in many natural objects like planets and fruit, as well as in man-made objects like Christmas ornaments.

Geometric solids with circular cross-sections are used in various fields, including architecture, engineering, and science. They are used for creating objects such as cans, pipes, towers, and buildings. These shapes are also used for modeling the natural world, such as the earth, planets, and the stars.

Cylinders, cones, and spheres can be created by rotating a two-dimensional shape about an axis. For instance, a circle that is rotated around its center axis forms a cylinder. Similarly, a triangle that is rotated around one of its sides forms a cone, while a circle that is rotated around its center axis forms a sphere.

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Answer:

Do 100 divided by how many people there are in total

Step-by-step explanation:

#PlatoGang

On solving the provided question, we can say that by linear equation we have 2.5x * cereals = y

A linear equation is one that has the form y=mx+b in algebra. B is the slope, and m is the y-intercept. It's usual to refer to the previous clause as a "linear equation with two variables" because y and x are variables. The two-variable linear equations known as bivariate linear equations. There are several instances of linear equations: 2x - 3 = 0, 2y = 8, m + 1 = 0, x/2 = 3, x + y = 2, and 3x - y + z = 3.

2.5 cups of this particular cereal,

the following linear equation, you could calculate how many calories and grams of fiber you were eating.

let x = cereals we eat y = calories

so, equation - 2.5x * cereals = y

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Using the normal approximation to the binomial, it is found that there is a 0.0015 = 0.15% probability that at most 80 of these people will choose the creamery's brand.

In a normal distribution with mean \(\mu\) and standard deviation \(\sigma\), the z-score of a measure X is given by:

\(Z = \frac{X - \mu}{\sigma}\)

In this problem:

The mean and the standard deviation are given by:

\(\mu = np = 300(0.35) = 105\)

\(\sigma = \sqrt{np(1-p)} = \sqrt{300(0.35)(0.65)} = 8.26\)

Using continuity correction, the probability that at most 80 of these people will choose the creamery's brand is \(P(X \leq 80 + 0.5) = P(X \leq 80.5)\), which is the p-value of Z when X = 80.5, thus:

\(Z = \frac{X - \mu}{\sigma}\)

\(Z = \frac{80.5 - 105}{8.26}\)

\(Z = -2.97\)

\(Z = -2.97\) has a p-value of 0.0015.

0.0015 = 0.15% probability that at most 80 of these people will choose the creamery's brand.

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Answer:

The answer is $860

Step-by-step explanation:

$688÷0.8=$860

Step-by-step explanation:

688 is 80 % of what number, x  ?

     80% is  .80 in decimal

.80 * x  = 688

x = $688/ .8  = $  860 .

Answer:

10 cakes

Step-by-step explanation:

Answer:

10 cakes is your answer ma'am/sir

Step-by-step explanation:

Answer:

is french which is higher median number of learners

Explanation:

The vertical bar on the inside of the box visually represents the median. For the French learners, the median is at 200. For the Spanish learners, the median is at 190.

Based on the survey results, a typical parent would spend around $44 on their child's birthday gift, with a margin of error of approximately $2.9 at a 99% confidence level.

To estimate how much a typical parent would spend on their child's birthday gift, we use the sample mean and standard deviation as estimates of the population parameters. The sample mean of $44 serves as the point estimate for the population mean.

To determine the margin of error, we use the standard error, which is the standard deviation divided by the square root of the sample size. In this case, the standard error is approximately $2.5 (standard deviation of $10 divided by the square root of 20). Multiplying the standard error by the critical value corresponding to a 99% confidence level (z-value of 2.58 for a large sample size) gives us the margin of error.

Therefore, the typical amount spent on a child's birthday gift is estimated to be $44, with a margin of error of approximately $2.9. This means that we can be 99% confident that the true mean amount spent by parents falls within the range of $41.1 to $46.9.

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∠2 is congruent to ∠6 based on corresponding angle theorem.

So here ,

Since in this question they are corresponding angles of parallel lines cut by a transversal, they are ∠2 ≅ ∠6 according to the Vertical Angles Theorem.

The complete question is : "Lines c and d are parallel lines cut by transversal p. Horizontal and parallel lines c and d are cut by transversal p. On line c where it intersects with line p, 4 angles are formed. Clockwise, from uppercase left, the angles are: 1, 2, 3, 4. On line d where it intersects with line p, 4 angles are formed. Clockwise, from uppercase left, the angles are: 5, 6, 7, 8. Which must be true by the corresponding angles theorem?"

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The conveyor speed for the assembly line is 2.67 meters per minute.

To calculate the conveyor speed for the assembly line, we need to consider the width of each component and the production requirements.

Given:

Width of each component = 0.4m

Production requirement = 3000 units per day

Number of shifts per day = 2

Shift duration = 8 hours

Personal time per shift = 30 minutes

Anticipated performance = 85%

First, let's calculate the effective production time per shift after accounting for personal time:

Shift duration = 8 hours = 8 * 60 minutes = 480 minutes

Personal time per shift = 30 minutes

Effective production time per shift = Shift duration - Personal time per shift

= 480 minutes - 30 minutes

= 450 minutes

Next, we need to determine the cycle time, which is the time required to produce one unit. To find the cycle time, we divide the effective production time per shift by the number of units required per day:

Cycle time = Effective production time per shift / Production requirement per day

= 450 minutes / 3000 units

= 0.15 minutes per unit

Finally, to calculate the conveyor speed, we need to consider the width of each component and the cycle time:

Conveyor speed = Width of each component / Cycle time

= 0.4m / 0.15 minutes per unit

= 2.67 m/minute

Therefore, the conveyor speed for the assembly line is 2.67 meters per minute.

It's important to note that this calculation assumes uniform production throughout the shift and does not account for any additional factors or constraints specific to your production process.

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The volume of pyramid MABCD is (E) 870 cubic units

To find the volume of pyramid MABCD, we need to determine the dimensions of the pyramid.

Let's assume that the length of DM is 'n' units. Since MA, MC, and MB are consecutive odd positive integers, we can express them as follows:

MA = n + 2

MC = n + 4

MB = n + 6

Now, let's consider the dimensions of the rectangle ABCD. Since ABCD is a rectangle, AB and CD have the same length, and AD and BC have the same length.

Let the length of AB (and CD) be 'a' units, and the length of AD (and BC) be 'b' units.

Since DM is perpendicular to the plane of ABCD, it bisects the rectangle into two equal parts. Therefore, AD = b/2 and BC = b/2.

To find the volume of the pyramid, we can use the formula: Volume = (1/3) × base area × height.

The base area of the pyramid is given by the product of AB (a) and BC (b/2), so the base area is (a × b/2).

The height of the pyramid is given by DM (n).

Therefore, the volume of the pyramid is:

Volume = (1/3) × (a × b/2) × n

= (abn)/6

Now, let's substitute the values of MA, MC, and MB into the dimensions of the rectangle:

AB = MA + MB = (n + 2) + (n + 6) = 2n + 8

AD = MC = n + 4

Since AB = CD and AD = BC, we have:

AB = CD = 2n + 8

AD = BC = n + 4

Substituting these values into the volume formula, we have:

Volume = (abn)/6

= ((2n + 8) × (n + 4) × n)/6

Since we know that the length of DM is an integer, we need to find a value of n that makes the expression ((2n + 8) × (n + 4) × n) divisible by 6.

If we test the given answer choices, we find that the only value that satisfies this condition is 870.

Therefore, the volume of pyramid MABCD is 870 cubic units.

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The question is incomplete the complete question is :

Let ABCD be a rectangle, and let DM be a segment perpendicular to the plane of ABCD. Suppose that DM has integer length, and the lengths of MA, MC, and MB are consecutive odd positive integers (in this order). What is the volume of pyramid MABCD? (A) 2475 (B) 60 (C) 285 (D) 66 (E) 870

The function that represent reflection of f(x) is given by g(x) = Negative two-fifths(10)x

Similar to reflections regarding the y-axis, the x-axis reflections are fundamentally the same. The only distinction is that the points are mirrored from above the x-axis to below the x-axis, and vice versa, rather than along the y-axis.

Make sure you have studied how to perform basic vertical and horizontal translations before we move on to reflections across the y-axis.

The reflection across the co-ordinate axis which is x-axis is as follows;

Reflection about the x-axis

Pre-image point before reflection = (x, y)

Point of image after reflection = ((x, -y)

Therefore, the x coordinate remains the same while the y coordinate changes sign

For which given that f(x) = y = 2/5(10)x and g(x) = Reflection of f(x) across the x-axis, we have

Reflection about the x-axis

Pre-image point before reflection = (x, f(x))

cordinate of image after the reflection = (x, g(x))

Hence g(x) = -f(x) = -2/5(10)x.

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Complete question:

Which function represents g(x), a reflection of f(x) = Two-fifths (10)x across the x-axis? g(x) = Negative two-fifths(10)x g(x) = Negative two-fifths (one-tenth) Superscript x g(x) = Two-fifths (one-tenth) Superscript negative x g(x) = Two-fifths(10)-x