What is the relationship between a 90% confidence interval around a mean and a 95% confidence interval around a mean?
a. The 90% C.I. is wider and includes more values than the 95% C.I.
b. The 95% C.I. is more precise in estimating a mean than the 90% C.I.
c. The 90% C.I. is more precise in estimating a mean than the 95% C.I.
d. The 95% C.I. is narrower and includes less values than the 90% C.I.

One-to-one is the following types of functions have inverse functions.

What is a simple definition of a function?

As a set of inputs with one output for each, a function is defined as a relationship between them. In plain English, a function is an association between inputs in which each input is connected to precisely one output.

                      A function is a type of rule that produces one output for a single input. One function, many. function onto (Surjective Function) into: perform. Function of a polynomial.

What does function entail when it does not?

A function is a relationship between a domain and a range where every value in the domain only has one possible value in the range. This notion is violated by relations that are not functions.

                            They contain at least one value in the domain that relates to two or more values in the range.

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There are 28 males and 11 females in the class.

What is a linear equation?

A linear equation is an algebraic equation of the form y=mx+b. involving only a constant and a first-order (linear) term, where m is the slope and b is the y-intercept. Occasionally, the above is called a "linear equation of two variables," where y and x are the variables.

Let the number of males be x and the number of females be y. We know that x = y + 17 and x + y = 39.

Substituting the first equation into the second equation, we get:

y + y + 17 = 39

2y + 17 = 39

2y = 22

y = 11

The number of females is 11, and the number of males is x = y + 17 = 11 + 17 = 28.

Hence, there are 28 males and 11 females in the class.

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Answer:

The answer is 1.86x10 6

Step-by-step explanation:

10x6 is 100k and the speed light travels is 186k so to get the answer you need to find the one that gets to 100k and then multiply it by 1.86

A triangle has two sides of length 18.9 and 2.9. inequality which describes the possible lengths for the third side, x is 16 < x < 21.8

The triangle inequality theorem states that,

given two lengths of the sides of a triangle, the length of the third side of the triangle must be greater than the difference and less than the sum of the two given sides.

For the two sides a and b of the triangle, the third side c must follow as follows:

(a - b) < c < (a + b)

So let a = 18.9 and b = 2.9

let the length of third side of triangle be x then

(18.9 - 2.9) < x < (18.9 + 2.9)

=> 16 < x < 21.8

So , the third side of the triangle must follow the inequality 16 < x < 21.8

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The rectangular prism that has the dimensions of 3 inches by 4.75 inches by 20.5 inches, has a total surface area, found by adding the surface areas of the six faces of 346.25 in²

The surface area of a solid three dimensional object is the area of the boundary surface of the object and its surroundings.

The dimensions of the rectangular prism in the question can be defined as follows;

Let the length of the rectangular prism = 3 inches

Let the width of the prism = 4.75 inches

Let the height of the prism = 20.5 inches

The surface area, A, of a rectangular prism can be found using the formula

A = 2 × Length × Width + 2 × Length × Height + 2 × Height × Width

Therefore, the surface area of the rectangular prism in the question is found as follows;

Area, A = 2 × 3 × 4.75 + 2 × 3 × 20.5 + 2 × 20.5 × 4.75 = 346.25

The total surface area of the rectangular prism is; 346.25 in²

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Answer:

60 or 90 degrees

Step-by-step explanation:

if one angle is 30 the other has to be 60 or 90 as they are common múltiples due the cosine rule and pythogras therom (mind my spelling).

The limit as a definite integral on the interval [tex]$\lim _{n \rightarrow \infty} \sum_{i=1}^n \frac{\cos x_i}{x_i} \Delta x$[/tex] on [2π , 4π] is [tex]$\int_{2\pi}^{4 \pi} \frac{\cos x}{x} d x$$[/tex].

A definite integral uses infinitesimal slivers or stripes of the region to calculate the area beneath a function. Integrals can be used to represent a region's (signed) area, the cumulative value of a function changing over time, or the amount of a substance given its density.

Definite integral, a term used in mathematics. is the region in the xy plane defined by the graph of f, the x-axis, and the lines x = a and x = b, where the area above the x-axis adds to the total and the area below the x-axis subtracts from the total.

If an antiderivative F exists for the interval [a, b], the definite integral of the function is the difference of the values at points a and b. The definite integral of any function can also be expressed as the limit of a sum.

Let the equation be

[tex]$\int_a^b f(x) d x=\lim _{n \rightarrow \infty} \sum_{i=1}^n f\left(x_i\right) \Delta x$[/tex]

substitute the values in the above equation, we get

= [tex]$\lim _{n \rightarrow \infty} \sum_{i=1}^n \frac{\cos x_i}{x_i} \Delta x$[/tex] on [2π, 4π],

simplifying the above equation

[tex]$\int_{2\pi}^{4 \pi} \frac{\cos x}{x} d x$$[/tex]

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Answer:

x=2

Step-by-step explanation:

7÷x=22÷6

cross multiply

7×6=21×x

21x=42

21x/21=42/21

x=2

The section A has total seats of, 25000, section B has got 14,700 and section C has got total 10,300 seats.

Mathematical actions are called expressions if they have at least two terms that are related by an operator and include either numbers, variables, or both. Adding, subtraction, multiplying, and division are all reflection coefficient operations. A mathematical operation such as reduction, addition, multiplication, or division is used to integrate terms into an expression.

As per the given equations in the question,

A + B + C = 50,000   (i)

42A + 24B + 18C = 1,588,200     (ii)

A = B + C    (iii)

Substitute value of A from (iii) to (i),

2B + 2C = 50000

B + C = 25,000   (iv)

Similarly, substitute value of (iii) in equation (ii),

42 (B +C) + 24B + 18C = 1588200

66B + 60C = 1588200

33B + 30C = 794100  (v)

Multiply 33 in equation (iv) and subtract from (v)

-3C = -30900

C = 10,300 seats.

Now,

B + C = 25000

B = 25000 - 10300

B = 14,700 seats.

And,

A = B + C

A = 10300 + 14700

A = 25000 seats.

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We can find the equation of any line passing through a given point and parallel or perpendicular to a given line by finding the slope of the given line and using slope-intercept form.

Given, the line passing through a given point and parallel and perpendicular to a given line

we have to find the equation of the lines

Let l1 be a line passing through a point (p , q) and parallel to a line l2.

suppose the equation of the line l2 be,

y = mx + c

the line l2 has slope m

Now to find the equation of the line l1,

(y - q)/(x - p) = m

On cross-multiplying, we get

y - q = m(x - p)

y = mx - pm + q

So, the equation of the line l1 be,

y = mx + (q - pm)

Similarly, we can find the equation of any line passing through a point and parallel to a given line.

Hence, we can find the equation of any line with the slope.

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You can infer that the exponential model is a better fit for the data in the experiment, as it has smaller residuals than the quadratic model.

Residuals are the difference between the actual data points and the predicted values generated by the model. They are a measure of how well a model fits the data, and a lower residual indicates a better fit. Therefore, if the student's exponential model has smaller residuals than their quadratic model, it can be concluded that the exponential model is a better fit for the experiment data.

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Answer:

Yes.

Step-by-step explanation:

In order for a relation to be a function, Each y value must have a unique x value. If there is any point where a vertical line hits the relation in two places, it is not a function. This relation follows the rules of being a function, and therefore is a function.

The age of Michelle is 30 years old (option A).

The mathematical operation that would be used to determine the required value is multiplication. Multiplication is the process of determining the product of two or more numbers. The sign that represents multiplication is ×.

The first step is to determine Fiona's age.

Fiona's age = Madeline's age x 2

Fiona's age = 5 x 2 = 10

The second step is to determine Michelle's age.

Michelle's age = Fiona's age x 3

Michelle's age = 10 x 3

Michelle's age = 30

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Answer: -20, -19, -18, |-18|, |-22|, |30|

Step-by-step explanation:

A number with vertical lines on either side means the absolute value of that expression, i.e. how far it is from 0. An absolute value can be 0 or positive but never negative.

|-18| = 18

|-22| = 22

|30| = 30

Positive numbers are bigger, greater, or higher than zero. They are on the opposite side of zero from the negative numbers. Negative numbers get smaller the farther they are from zero. You can think of positive and negative numbers as being opposites because they are on opposite sides of the number line.

I hope this helps :)

Speed is the ratio of distance and time.

It shows how fast an object is moving at a given time.

The rate of change of the distance below the sea level with respect to time is 11 feet per second.

Speed is the ratio of distance and time.

It shows how fast an object is moving at a given time.

We have,

The table has a linear relationship.

We can choose two data from the table.

At time = 15,

Distance below the sea level = 545 feet.

At time = 27,

Distance between the sea level = 677

Now,

The rate of change of the distance below the sea level with respect to time.

Slope:

= (677 - 545) / (27 - 15)

= 132 / 12

= 11 feet per second

Thus,

The rate of change of the distance below the sea level with respect to time is 11 feet per second.

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The rate of change of distance for the submarine is given by 11 feet/sec.

In order to find the slope between two points (x₁, y₁) and (x₂, y₂), take the ratio of the difference of the respective coordinates as (y₂ - y₁)/(x₂ - x₁).

Given that,

The table for distance travelled versus time taken for a submarine.

In order to find the slope, take two values of distance and time from the given table as  380 feet at t = 0 and 545 feet at t = 15.

Now, the slope can be found as,

slope = (545 - 380)/(15 - 0)

         = 165/15

         = 11

Hence, the rate of change of distance below sea level with respect to time is given as 11 feet/sec.

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Probability that the horse will not win the race is  d) 0.6250

What is a probability ?

A probability is a number that reflects the chance or likelihood that a particular event will occur. Probabilities can be expressed as proportions that range from 0 to 1, and they can also be expressed as percentages ranging from 0% to 100%.

odds in favour of winning a race of 3:5

thus, 3 chances of winning to every 5 chances of losing.

So, if the race were held 8 times, one would be expected to win 3 races and lose 5 races.

Thus, the probability of winning the race is 3/8.

Probability that the horse will not win the race is 1- 3/8 = 1 - 0.3750 = d) 0.6250

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The expected value for the number of subjects who are vaccinated and are diseased is  56.7

Since we are given the information that a new vaccination is being used in a laboratory experiment to investigate whether it is effective. there are 273 subjects in the study.  We can calculate this by taking the total number of subjects who are vaccinated (119) and multiplying it by the proportion of subjects who are diseased

(47/273).  119 x (47/273) = 56.7

which is  the expected value for the number of subjects who are vaccinated and are diseased

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Answer:

62 + 6x + 10y

Step-by-step explanation:

1. add the x's together

3x+3x = 6x

2. add the constants together

66-6-6+4+4 = 62

3. add the y's together

5y + 5y = 10y

The linear equation for the given chart is: y = -3x + 7.

From the chart given, we can use two pairs of values to find the slope (m) and the y-intercept (b), then plug in their values into the equation that is expressed in slope-intercept form as y = mx + b.

Using two points, (1, 4) and (3, -2), find the slope (m):

Slope (m) = change in y / change in x = (-2 - 4) / (3 - 1)

Slope (m) = -6/2

Slope (m) = -3

Find the y-intercept (b) by substituting m = -3 and (x, y) = (1, 4) into y = mx + b:

4 = -3(1) + b

4 = -3 + b

4 + 3 = b

7 = b

b = 7

To write the linear equation, substitute m = -3 and b = 7 into y = mx + b:

y = -3x + 7

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The required choice for inequality is Option 2.

What is inequality?

An inequality in mathematics is a relation that compares two numbers or other mathematical expressions in an unequal way.

Finding a range, or ranges within ranges, of values that an unknown x can have while still satisfying the inequality is referred to as "solving" an inequality. In this lesson, inequalities are resolved using graphs and algebra.

Given, 3(8 – 4x) < 6(x – 5)

or, 24 - 12x < 6x - 30

or, 24 + 30 < 6x + 12x

or, 54 < 18x

or, 18x > 54

or, x > 3 means x is greater than positive 3 and pointing to the right.

Hence, the required choice for inequality is Option 2.

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Answer: b

Step-by-step explanation:

The correct statement regarding whether Maple Street and Elm Street are parallel lines is given as follows:

Yes, because angles 1 and 2 are supplementary.

Parallel lines are two lines that do not intersect, or technically, intersect only at infinity.

In this problem, we have that angles 1 and 2 are supplementary angles, hence:

m<1 + m<2 = 180º

As the sum of the measures of supplementary angles is of 180º.

Then these two angles are classified as consecutive interior angles, meaning that Maple Street and Elm Street are parallel lines cut by the transversal River Drive.

Thus the second option is the correct option.

The situation is represented by the image shown at the end of the answer.

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The dimensions of the rectangle are 6 and 3.5 ft.

Let the width of rectangle be x. So, the length of the rectangle will be 2x - 1. As per the known fact, the area of rectangle is given by the formula -

Area = length × breadth

Keep the values in formula to find the dimensions of the rectangle

x(2x - 1) = 21

Performing multiplication on Left Hand Side of the equation

2x² - x = 21

Rewriting the equation

2x² - x - 21 = 0

On factorizing we get, x = -3 and 3.5.

The dimensions of rectangle can not be negative, this, taking the value of x as 3.5. Now, the width of rectangle will be 3.5.

Length of rectangle = (2×3.5 - 1)

Length of rectangle = 7 - 1

Length of rectangle = 6

Thus, the length and width is 6 and 3.5 ft respectively.

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The complete question is -

the length of a rectangle 1ft less than double the width ,and the area of the rectangle is 21ft^2 find the dimensions

1. My friend took his master's degree in Spain :- Simple

2. Roses are red, but violets are blue. :- Compound

3. You are entitled to a 30% discount if you are a member.:- Compound

4. Boel was on time, but Tom was late.:- Compound

5. Either he watches a niovie or dines with his friends.:- Compound

6. If it is an acute angle, then it has less than 90.:- Simple

A simple sentence consists of just one clause. And it is consist of a subject and a verb.

A simple sentence has the most basic elements that make it a sentence: a subject, a verb, and a completes thought.

A compound sentence is made up of two or more independent clauses.

This compound sentence consist of two simple clauses connected by the coordinating conjunction 'and'.

Two independent clauses need to be connected with a coordinating conjunction or separated with a full stop or semicolon.

A simple sentence can also be refereed to as an independent clause.

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On solving the provided question, we got to know that -  to plot the graph, required equation is 3x +y -8 = 0

a collection of numbers, symbols, and operators (like + and ) that represent a value. Examples -  2 + 3 is a formula and there is also the statement 3 x/2. The equals symbol does not appear in expressions. Actually, none of these = ≠ < > ≤ ≥

We frequently have to understand a written phrase in order to write an expression. For instance, the notation x + 6 can be used to represent the phrase "6 added to some number," where x stands for the unknown value.

To plot the graph,

we need to find the equation first.

and to find the equation -

[tex](y - y1) = m(x - x1)\\here,\\x1 = 1\\y1 = 5\\m- ( -3 )[/tex]

equation  -

(-3)(x-1) = y-5

-3x + 3 = y-5

3x - 3 = 5-y

3x +y -8 = 0

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Answer: 74

Step-by-step explanation:

Answer:

74

Step-by-step explanation:

Got it right on the test.

The integer the represent a flight overbooked by 4 passengers is y = x + 4

What is Equation Modelling?

Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.

Given,

A flight overbooked by 4 passengers.

Let, x = Initial capacity of the flight to have passengers

and, y = Total capacity after adding all the passengers

so, the equation is

y = x + 4

Therefore, the integer the represent a flight overbooked by 4 passengers is y = x + 4.

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Answer:

∠D = 127°

Step-by-step explanation:

Let's define the properties of a parallelogram to understand how to solve for ∠D.

⭐The opposite angles in a parallelogram are congruent.

⭐The sum of the interior angles of a parallelogram is 360°.

First, let's solve for x knowing that the opposite angles are congruent.

∠A = ∠C

[tex]13x - 25 = 9x - 1[/tex]

[tex]13x - 9x = 25 - 1[/tex]

[tex]4x = 24[/tex]

[tex]x = 6[/tex]

∴ x = 6

Next, substitute x into ∠C.

∠C = 9x - 1

∠C = 9(6) - 1

∠C = 54 - 1

∴ ∠C = 53°

Finally, substitute ∠C into the equation 2(∠D) + 2(∠C) = 360° to solve for ∠D.

2(∠D) + 2(∠C) = 360°

2(∠D) + 2(53) = 360

2(∠D) + 106 = 360

2(∠D) = 254

∴ ∠D = 127°

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$100 much better off per month would the firm be if it adopted preventive maintenance.

Given that,

We have to find how much more profitable would the company be each month if it implemented preventive maintenance.

We know that,

Number of Breakdowns are 0, 1, 2, 3, 4

The problems for the breakdowns are 0.50, 0.25, 0.10, 0.10, 0.05

Cost of a breakdown is $2,000

A monthly preventive maintenance programme costs $2,000

Expected probability of breakdown:

E(x) = Σ(X × p(x))

= (0×0.5) + (1×0.25) + (2×0.10) + (3×0.10) + (4×0.05)

= 0.95

E(x) ×cost of breakdown = (0.95 × 2000) = $1900

So, Difference between breakdown and preventive maintenance

1900 - 2000 = - $100

Therefore, $100 much better off per month would the firm be if it adopted preventive maintenance.

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The proportion is 12 : 14 : : 18 : w and the value of w is 21

The number of shots in Game 2 is 21

What is Proportion?

The proportion formula is used to depict if two ratios or fractions are equal. The proportion formula can be given as a: b::c : d = a/b = c/d where a and d are the extreme terms and b and c are the mean terms.

Given data ,

Let the 2 games be Game 1 and Game 2

Now , the equation will be

The number of points in Game 1 = 12

The number of shots in Game 1 = 14

And ,

The number of points in Game 2 = 18

The number of shots in Game 2 = w

So , the proportion equation is given as

Number of points in Game / number of shots in Game = number of points in Game / number of shots in Game 2

Substituting the values in the equation , we get

12 / 14 = 18 / w

Multiply by 14 on both sides of the equation we get

12 = ( 18 x 14 ) / w

Multiply by w on both sides of the equation , we get

12w = 18 x 14

Divide by 12 on both sides of the equation , we get

w = ( 18 x 14 ) / 12

On simplifying the equation , we get

w = 3 x 7

w = 21

Therefore , the value of w is 21

Hence , The proportion is 12 : 14 : : 18 : w and the value of w is 21

The number of shots in Game 2 is 21

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-25x+800=0

-25x =-800

25x=800

x=32

Answer:

x = 32

Step-by-step explanation:

0=-25x+800

To solve for x, add 25x to each side

0+25x=-25x+800+25x

25x = 800

Divide each side by 25

25x/25 = 800/25

x = 32