From a random sample of potential voters in an upcoming election, 47% indicated they intended to vote for Candidate R. A 95 percent confidence interval was constructed from the sample, and the margin of error for the estimate was 5%.
Which of the following is the best interpretation of the interval?
A) We are 95% confident that the proportion who intend to vote for Candidate R from the random sample is between 42% and 52%.
B) We are 95% confident that the proportion who intend to vote for Candidate R from the population is between 42% and 52%.
C) We are 95% confident that the proportion who intend to vote for Candidate R from the random sample is 47%.
D) We are 95% confident that the proportion who intend to vote for Candidate R from the population is 47%.
E) We are confident that 95% of the population intend to vote for Candidate R.

Since Dean ran 2.3 fewer kilometers than Sam. If Dean ran 6.8 km, the true statements about the distance which Sam ran are:

A. You know the difference in the distances the boys ran, so this is a subtraction problem.

E. The correct equation is s – 2.3 = 6.8.

In Mathematics, distance can be defined as the total amount of ground that is covered or travelled by a physical object (body) over a particular period of time and speed, irrespective of its direction, starting point or ending point.

Since Dean ran 6.8 km and 2.3 fewer kilometers than Sam, we can logically deduce that this is a subtraction problem. Assuming the variable s represent the distance which Sam ran, Sam's distance can be calculated as follows;

s – 2.3 = 6.8

s = 6.8 + 2.3

s = 9.1 kilometers.

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The remainder of the division is (x-3)(x+13)/x-7

From the information given, we have that;

This is represented as;

2x² + 7x - 39/x - 7

Now, factorize the numerator

Find the pair factors of -78 that sum up to 7, then substitute the value, we have;

2x² + 13x - 6x - 39/x- 7

(2x² + 13x) - (6x-39)/x-7

Factor the common terms

x(x + 13) - 3(x + 13)/x-7

Then, we get;

(x-3)(x+13)/x-7

Hence, the value is (x-3)(x+13)/x-7

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Answer:

No

Step-by-step explanation:

2 * 5 = 10

12 does not equal 10

Answer: In order to find the number of campgrounds that Montana would expect to have if it was proportional to Nevada in the number of campgrounds to counties, we need to determine the ratio of campgrounds to counties in Nevada and then apply that same ratio to Montana.

First, we'll find the ratio of campgrounds to counties in Nevada by dividing the number of campgrounds (637) by the number of counties (18): 637 / 18 = 35.389

Now we'll apply that same ratio to Montana by multiplying the number of counties in Montana (41) by the ratio of campgrounds to counties in Nevada: 41 x 35.389 = 1458.369

Rounding to the nearest whole number, we get 1458. So if Montana was proportional to Nevada in the number of campgrounds to counties, we would expect to find 1458 campgrounds in Montana.

Step-by-step explanation:

The following expressions have length dimensions: a. at b. x3/t

d. √2ax

a. at: has a dimension of m because it is the product of acceleration (m/s2) and time(s). b. 1/2at2: has a dimension of m because it is the product of acceleration (m/s2) and time(s) squared. c. x3/t: has a dimension of m because it is the product of distance x (m) cubed and time(s).

e. v2/a: is a product of velocity (m/s) squared and acceleration (m/s2) thus it doesn't have a dimension of length. d. 2ax: is a product of 2, distance x (m), and acceleration (m/s2) so it has dimension of m.

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Since it is possible to drive a fraction of a mile, so it will be appropriate to use fractions; however, it is not possible to drive a negative number of miles, so only positive rational numbers are appropriate.

A rational number is said to be positive if its numerator and denominator are both positive.

Now, we are told that lian's truck uses 0.05 gallon of gas for every mile driven. Thus;

Rate of consumption of gas = 0.05 gallons per mile

The function for number of gallons is;

y = -0.05x + 25

where;

x is number of miles

y is number of gallons

We can use a fraction for the number of miles because it is possible but then the number of miles must be positive rational numbers because number of miles cannot be negative.

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When the prism is taken out of the cylinder, the composite shape's volume is 3.048.

The volume of an item in three dimensions is the area that is enclosed by its boundaries. The space that an object occupies in three dimensions is measured by its volume, which is given in cubic units. A few of illustrations of cubic units are cm3 and in3. On the other side, an item's mass is used to measure how much matter it contains. One typical method to ascertain an object's mass is to weigh it, either in pounds or kilogrammes. Unlike the primary equation for the square of a rectangular box, which would be length, breadth, and height, the primary equation in capacity is length, width, and height.

given

volume of cylinder - 9.234

volume of the prism - 6.186

the volume of composite shape is = volume of cylinder - volume of prism

= 9.234 - 6.186

= 3.048

When the prism is taken out of the cylinder, the composite shape's volume is 3.048.

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The exact value of sin(x + y) is (1 - 2√6) /6. The 2nd option is the answer.

We have sin(x) = -1/2 and cos(y) = -1/3

x is an angle in quadrant III, and y is an angle in quadrant II

For x:

Using trigonometric ratio

sin(x) = -1/2 (sin = opposite/hypotenuse)

adjacent = √(2²-(-1)²) = √3

cos(x) = (-√3)/2  (cos = adjacent/hypotenuse)

Note: adjacent in quadrant III is negative

For y:

Using trigonometric ratio

cos(y) = -1/3  (cos = adjacent/hypotenuse)

opposite = √(3²-(-1)²) = √8 = 2√2

sin(y) = (2√2)/3  (sin = opposite/hypotenuse)

Using trigonometric identity:

sin (x + y) = sin (x)·cos(y) + cos (x)·sin (y)

sin (x + y) = -1/2·(-1/3)  +  [(-√3)/2]·[(2√2)/3]

sin (x + y) = 1/6 - (√6)/3

sin (x + y) = (1 - 2√6) /6

Thus, the exact value of sin(x + y) is  (1 - 2√6) /6

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So, b) and e) are subspaces of R3, and a), c), and d) are not.

a) {(x,y,z) ∈R3 : x = 0} is not a subspace of R3, because it doesn't contain the zero vector (0,0,0) which is a requirement for a subspace. It's also not closed under scalar multiplication.

b) {(x,y,z) ∈R3: x + y = 0} is a subspace of R3, because it's closed under scalar multiplication and addition and it contains the zero vector (0,0,0).

c) {(x,y,z) ∈R3 : xz = 0} is not a subspace of R3, because it's not closed under scalar multiplication and it's not closed under addition

d) {(x,y,z) ∈ R3: y ≥0} is not a subspace of R3, because it's not closed under addition, it doesn't contain the zero vector (0,0,0) and it's not closed under scalar multiplication.

e) {(x,y,z) ∈ R3: x = y = z} is a subspace of R3 because it satisfies all the properties of a subspace, it is closed under addition, scalar multiplication, it contains the zero vector (0,0,0) and the negative of any vector in the set is also in the set. This set contains all the vectors that are multiples of (1,1,1) which forms a subspace.

So, b) and e) are subspaces of R3, and a), c), and d) are not.

Complete Question: For each of the following subsets of R3 determine whether it is a vector subspace of R3 or not. Justify your answer.                                                                                                                                                      

a) {(x,y,z) ∈R3 : x = 0}

b) {(x,y,z) ∈R3: x + y = 0}

c) {(x,y,z) ∈R3 : xz = 0}

d) {(x,y,z) ∈ R3: y ≥0}

e) {(x,y,z) ∈ R3: x = y = z}

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Answer:

In probability and statistics, the law of big numbers holds that as a sample size increases, its mean gets closer to the average of the entire population. This is because as the sample size increases, the sample becomes more representative of the population.

According to the law of large numbers, a large entity that is expanding quickly cannot continue doing so indefinitely. Often used as instances of this phenomenon are the largest blue chips, with market values in the hundreds of billions.

Two distinct subjects can be covered by the law of huge numbers. First, there are many topics to which the law of large numbers can be applied in statistical analysis. In order to acquire the necessary amount of data, it may not be practical to survey every member of a given population, but every additional data point has the potential to raise the probability that the result is an accurate representation of the mean.

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The correct arrangement regarding the angles of the triangle is;

m∠Y < m∠Z < m∠X

In triangle XYZ, the lengths of sides are;

XY = m + 8

YZ = 2m + 3

ZX = m - 3

If m ≥ 6, then;

m + 8 ≥ 14

2m + 3 ≥ 15

m - 3 ≥ 3

Thus;

m - 3 ≤ m + 8 ≤ 2m + 3

The greatest angle is opposite to the greatest side, the smallest angle is opposite to the smallest side, so;

the greatest side is  YZ = 2m + 3- the greatest angle is ∠X

the smallest side is ZX = m - 3 - the smallest angle is ∠Y

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Answer:

y=-4x-24

Step-by-step explanation:

draw the line on a grid paper so that you know the slope must be negative. then plug in the numbers.

The number of servings that Sam has would be = 18.67 servings.

A fraction is part of a whole value that is being represented in a form of numerator and denominator.

The number of cups that Sam has = 9 1/3 = 28/3

The number of cups used for each serving = 2/4

That is ;

1 serving = 2/4 cups

X servings = 28/3 cups

Make X the subject of formula;

X servings = 28/3 ÷ 2/4

= 28/3 × 4/2

= 112/ 6

= 18.67 servings.

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The volume of the solid with the given semi-circular base with radius 5 units is equal to 333.33 cubic units.

As given in the question,

Radius of the semicircular base = 5 units

Equation of the circle is given by :

x² + y² = r²

⇒ x² + y² = 5²

⇒ x² + y² = 25

⇒ x = √25 - y²

Cross section is perpendicular to the base and it is parallel to the diameter  are squares:

Diameter is double of the radius

s = 2x

 = 2√25 - y²

Volume of the given solid is equal to :

V = [tex]\int\limits^5_0 {s^{2} } \, dy[/tex]

  = [tex]\int\limits^5_0 {( 2\sqrt{25 - y^{2} }) ^{2} } \, dy[/tex]

 = [tex]\int\limits^5_0 {( 4({25 - y^{2} }) } \, dy[/tex]

= 100y - 4y³/3 (for limit 0 to 5)

=  ( 500 - 500/3 ) - 0

= 500 ( 1 - 1/3 )

= 500( 2/3 )

= 1,000/3

= 333.33 cubic units.

Therefore, the volume of the given solid with the given measures is equal to 333.33.

The above question is incomplete, the complete question is :

Use the general slicing method to find the volume of the following solid.

The solid with a semicircular base of radius 5 whose cross sections perpendicular to the base and parallel to the diameter are squares. Place the semicircle on the xy-plane so that its diameter is on the x-axis and it is centered on the y-axis. Set up the integral that gives the volume of the solid. Use increasing limits of integration.

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Answer:

56

Step-by-step explanation:

The base area will be 4 times the side length

56 units

A real - life representation of 12 / 49 = 0. 24 is the cost of a single donut in a 49 pack of donuts that cost $ 12.00

The equation is 12 / 49 = 0. 24. A real - life representation of this could have to do with unit cost, and total cost.

The 12 could be the total cost of a package of donuts that have 49 donuts inside.

The unit cost of each of these donuts would therefore be:

= Total cost of donuts / Number of donuts in package

= 12 / 49

= $ 0.24 per donut

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Answer:

52%

Step-by-step explanation:

Since the question asks about tails, we don't need the information about heads.

So out of 200 flips, 104 were tails. If we put 104 out of 200 in fraction form, you get;

104

-----

200

Now we just divide;

104/200 = 0.52, also known as 52%

49 is the shaded part of the rectangle.

Therefore, the rule for its area is base1+base2/2xh

Base1=9

Base2=20

Height = 4

Therefore, 9+20/2 x 4= 49.

The denominator is the total number of pieces that make up the whole, which is eight. That is the figure beneath the fraction bar. The numerator is the number of shaded portions, which is 7. That is the value shown above the fraction bar.

The shaded region’s area is the difference between the area of the complete polygon and the area of the polygon’s unshaded portion. In polygons, the area of the shaded component can arise in two ways. The darkened zone might be found in the middle of a polygon or on its sides.

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The area of the shaded region of the rectangle is 130 sq. meter

A quadrilateral with four right angles is a rectangle. It may alternatively be described as a parallelogram with a right angle or an equiangular quadrilateral, where equiangular denotes that all of its angles are equal. A square is a rectangle with four equally long sides.

The denominator is the total number of pieces that make up the whole, which is eight. That is the figure beneath the fraction bar. The numerator is the number of shaded portions, which is 7. That is the value shown above the fraction bar.

The shaded region’s area is the difference between the area of the complete polygon and the area of the polygon’s unshaded portion. In polygons, the area of the shaded component can arise in two ways. The darkened zone might be found in the middle of a polygon or on its sides.

The base length = 9 m

The base width = 20 m

The height = 4m

The area of the shaded region = 1/2 *(9 + 4)*20 = 130 sq. meter

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a) The maximum height of a firework is 292.25 feet.

b) The time required by a firework to reach its maximum height is 2.875 second.

Herein we find the case of a firework being launched under free fall motion, that is, a vertical uniformly accelerated motion due to gravity, represented by following quadratic equation:

f(t) = - 16 · t² + 92 · t + 160

Where:

Part A - The maximum height can be found by modifying the quadratic equation into vertex form. This can be done by completing the square:

f(t) = - 16 · t² + 92 · t + 160

f(t) = - 16 · [t² - (23 / 4) · t - 10]

f(t) - 16 · (529 / 64) = - 16 · [t² - (23 / 4) · t + 529 / 64] + 160

f(t) - 292.25 = 16 · (t - 2.875)²

The firework reaches a maximum height of 292.25 feet.

Part B - The firework takes a time of 2.875 seconds to reach its maximum height.

Free fall equation has several mistakes and was corrected according to principles of free fall motion.

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The value of P(A|B) from the given data is 1/6 ≅ 0.17    

The term P(A/B) is known as a conditional probability which indicates the probability of an event A that depends on another event B.  

The probability of an event or outcome occurring due to the existence of a prior event or outcome is known as conditional probability.  

P(A/B) is used to find this conditional probability.

The formula for P(A/B) is given by

Here we have

A ven diagram which shows sports played by 10 students

From given figure

Number of students who play basketball, p(A) = 3

Number of students who play soccer, p(B) = 2  

Number of students who play both games, A∩B = 3  

As we know, P(A/B) = P(A∩B)/P(B)    

= 1/3 [2]

= 1/6 ≅ 0.17    

Therefore,

The value of P(A/B) from the given data is 1/6 ≅ 0.17      

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The expression for the side of the square will be s=x^(1/2) in

where s=side.

what are squares?

A square is a two-dimensional plane figure with four equal sides and all four angles are equal to 90 degrees. The properties of the rectangle are somewhat similar to a square, but the difference between the two is, a rectangle has only its opposite sides equal. Therefore, a rectangle is called a square only if all its four sides are of equal length.

The most important properties of a square are listed below:

Area of square=(side)²

Perimeter of square=4*side

Now,

Area of square=(side)²

and given that

A=x in^2

s^2=x

s=√x

Therefore, expression in rational exponent form will be

s=x^(1/2)

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The average rate of change for 1.8 < x < 2.5 is given as follows:

121.43.

The average rate of change of a function is given by the change in the output divided by the change in the input.

The change in the output for this problem is given as follows:

325 - 240 = 85.

The change in the input for this problem is given as follows:

2.5 - 1.8 = 0.7.

Hence the average rate of change is given as follows:

85/0.7 = 121.43.

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True, Deciding that a process that fills bottles with soda is functioning properly by checking the weights for a sample of bottles is an example of inferential statistics.

A subset of statistics known as inferential statistics uses a variety of analytical techniques to extrapolate conclusions about population data from sample data.

It is an example of inferential statistics because you are using a sample of data to make inferences about the population of bottles being filled, rather than measuring the weight of every bottle.

Hence, Deciding that a process that fills bottles with soda is functioning properly by checking the weights for a sample of bottles is an example of inferential statistics.

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Hey there!

Answer:

An equivalent to the given expression [tex]5f+4f[/tex] would be [tex]9f[/tex].

Hope this helps!

Answer:I hope this helps

Step-by-step explanation:

5f+4f

Collect like terms by adding their coefficients
which is like this

(5f+4f)f and now we

Add the numbers in the parentheses

=9f

The true statement is that the sample mean is not biased

From the question, we have the following parameters that can be used in our computation:

Sample selection of 2

The sample is selected such that all 4 samples are equally likely

This means that

P(Each selection) = 1/4

An unbiased sample is such that reflects all members of the population and in this case, this sample reflects the population

Hence, the sample is unbiased

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By Assuming the denominator does not equal zero. a³b³/a⁴b equivalent expression is  b⁴/a.

What is an equivalent expression?

Equivalent expressions are expressions that have the same result when they are simplified.

Two expressions are considered equivalent if they can be transformed into each other by applying mathematical operations such as simplification, combining like terms, or applying the properties of arithmetic and algebra.

Equivalent expressions can be used to solve problems more efficiently or to help understand complex mathematical concepts.

For example, simplifying an expression to its simplest form can make it easier to understand or perform further calculations with it.

Equivalent expressions can also be used to check the correctness of a solution to a problem, by verifying that the answer can be transformed into the expected result.

The given expression can be simplified as follows:

a³b³ / a⁴b = (a³/a⁴) * (b³/b)

a³/a⁴ = 1/a

b³/b = b²

Hence, By Assuming the denominator does not equal zero. a³b³/a⁴b equivalent expression is  b⁴/a.

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The side length of the cube is 1/6 and the volume is 1/216

From the question, we have the following parameters that can be used in our computation:

Face area = 1/36

This means that

Side length = √(1/36)

Evaluate

Side length = 1/6

From the question, we have the following parameters that can be used in our computation:

Side length = 1/6

This means that

Volume = (1/6)^3

Evaluate

Volume = 1/216

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Yes, cropping a picture and then using a scale factor to resize it is a two-step process.

The image is first cropped by subtracting 2 inches from the right side, altering the image's proportions.

The image is then enlarged using a scale factor of 1.5, which increases the image's dimensions by 1.5.

The final measurements of the image would be its original measurements less 2 inches (for cropping), then multiplied by 1.5. (for the resizing).

It's vital to keep in mind that both picture cropping and image scaling change the size of the final product.

Yes, cropping a photo, then resizing it with a scale factor, is a two-step process.

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By applying the formula of cuboid volume, the volume of the box can be expressed as 225x - 60x² + 4x³.

Cuboid is a 3-D shape formed by three pairs of rectangles (6 sides), 12 edges, and 8 vertices.

The volume of a cuboid can be calculated as follows:

Volume = length * width * height

Initially, we have a 15 x 15-inch piece of metal, then we cut out the four corners so that the sides can be folded up to make a box.

Now we have a shape as the attached image, where x represents the length of the sides of the squares that are to be cut out.

Thus, after the cutting, the length of the new side is 15 - 2x.

This value also represents the length and width of the box, whilst the height is x.

Now we can calculate the volume of the box:

Volume = length * width * height

             = (15 - 2x) * (15 - 2x) * x

             = (225 - 60x + 4x²) * x

             = 225x - 60x² + 4x³

Thus, the volume of the box can be expressed as 225x - 60x² + 4x³.

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