A random sample of n1 = 201 people who live in a city were selected and 73 identified as a "dog person." A random sample of n2 = 91 people who live in a rural area were selected and 56 identified as a "dog person." Find the 99% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog person" and the proportion of people that live in a rural area who identify as a "dog person."

The test statistic for this problem is given as follows:

t = -0.7.

We have the standard deviation for the sample, hence the t-distribution is used to calculate the test statistic.

The equation for the test statistic is given as follows:

[tex]t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}[/tex]

In which:

The parameters for this problem are given as follows:

[tex]\overline{x} = 68.4, \mu = 69, s = 10.5, n = 152[/tex]

Hence the test statistic is given as follows:

[tex]t = \frac{68.4 - 69}{\frac{10.5}{\sqrt{152}}}[/tex]

t = -0.7.

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Answer:

-12n - 6

Step-by-step explanation:

To represent this situation, we can use the following equation:x = the number of packs of stickers Isabella bought x packs of stickers, and each pack costs $3.

So the total cost of the stickers is given by the following equation:3x = total cost of stickers Since she spent a total of $18 on stickers, we can set the equation equal to 18 to get:3x = 183x/3 = 18/3x = 6Therefore, Isabella bought 6 packs of stickers to give to her friends.

To solve this problem, let's assume that Isabella bought "x" packs of stickers.

According to the given information, each pack costs $3. So, the total amount Isabella spent on stickers is $18.

We can represent this situation with the following equation:

3x = 18

Here, "3x" represents the cost of "x" packs of stickers, and it is equal to $18.

To find the number of packs Isabella bought, we can solve the equation for "x".

Dividing both sides of the equation by 3, we get:

x = 18 / 3

x = 6

Therefore, Isabella bought 6 packs of stickers.

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The given information is that Isabella bought packs of stickers, each pack costs $3. She spent a total of $18 on stickers. It is asked to find number of packs did she buy.

Therefore, the answer for this question is that Isabella bought 6 packs of stickers.

Let the number of packs that Isabella bought be p. Each pack costs $3, so she spent a total of $18 on stickers. Using these terms, we can set up the equation:3p = 18To solve for p, we divide both sides of the equation by 3:p = 6. Therefore, the answer for this question is that Isabella bought 6 packs of stickers.

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The approximate value of sin(theta) for 0 degrees < theta < 90 degrees, given cos(theta) = 0.3090, is approximately ±0.9511. The correct answer from the given options is A, which states sin(theta) = 0.9511 and tan(theta) = 0.3249.

To determine the value of sin(theta) given that cos(theta) is 0.3090, we can use the identity [tex]\(\sin^2(\theta) + \cos^2(\theta) = 1\)[/tex].

Since we know cos(theta) is 0.3090, we can substitute it into the identity:

[tex]\(\sin^2(\theta) + 0.3090^2 = 1\)[/tex]

[tex]\(\sin^2(\theta)\)[/tex] + 0.095481 = 1

[tex]\(\sin^2(\theta)\)[/tex] = 0.904519

Taking the square root of both sides, we get:

sin(theta) = √(0.904519)

sin(theta) ≈ ±0.9511

So, the approximate value of sin(theta) is approximately ±0.9511.

Now let's evaluate the given options:

A. sin(theta) = 0.9511; tan(theta) = 0.3249

B. sin(theta) = 0.9511; tan(theta) = 3.0780

C. sin(theta) = 3.2362; tan(theta) = 0.0955

D. sin(theta) = 3.2362; tan(theta) = 10.4731

We can eliminate options C and D immediately since the value of sin(theta) cannot be greater than 1.

Now, let's consider options A and B. Both options have sin(theta) = 0.9511, which matches our approximate value. However, the value of tan(theta) in option A is 0.3249, while in option B it is 3.0780.

Since we're looking for values of sin(theta) and tan(theta) that are consistent with the given cos(theta) = 0.3090, we can conclude that option A is the correct answer.

Therefore, the approximate values of sin(theta) and tan(theta) for 0 degrees < theta < 90 degrees are:

sin(theta) ≈ 0.9511

tan(theta) ≈ 0.3249

Therefore, the correct answer is A. sin(theta) = 0.9511; tan(theta) = 0.3249.

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Answer:

82 ☺️

Step-by-step explanation:

The calculated probability will indicate the likelihood of a break-in given that the alarm has gone off. If the probability is high, it suggests a higher chance of an actual break-in. If the probability is low, it indicates that the alarm might have been triggered by some other reason.

To calculate the probability that someone is breaking into your neighbour's house if the alarm goes off tomorrow night, we can use Bayes' Theorem. Let's denote the events as follows:

A: Someone is breaking into the house

B: The alarm goes off

We need to get P(A|B), the probability of A and B.

Using Bayes' Theorem:

P(A|B) = (P(B|A) * P(A)) / P(B)

P(B|A) = 0.98 (the likelihood of the alarm sounding if someone breaks in)

P(A) = 3/10,000 (the chances of being broken into in your neighbourhood)

P(B) = ?

To obtain P(B), we can use the law of total probability:

P(B) = P(B|A) * P(A) + P(B|A') * P(A')

Since the alarm has gone off on 8 different nights for no apparent reason, we can assume P(B|A') is high, let's say 0.99.

P(A') = 1 - P(A) = 1 - 3/10,000 = 9,997/10,000

Now we can calculate P(B):

P(B) = (0.98 * 3/10,000) + (0.99 * 9,997/10,000)

Finally, we can calculate P(A|B) using Bayes' Theorem:

P(A|B) = (P(B|A) * P(A)) / P(B)

After calculating the values, we can obtain the probability that someone is breaking into your neighbor's house if the alarm goes off tomorrow night.

ii) The calculated probability will indicate the likelihood of a break-in the alarm has gone off. If the probability is high, it suggests a higher chance of an actual break-in. If the probability is low, it indicates that the alarm might have been triggered by some other reason.

To improve the situation, the manufacturer would need to reduce the false alarm rate, as the alarm going off for no apparent reason undermines its effectiveness. This can be achieved by enhancing the alarm system's technology or implementing stricter criteria for triggering the alarm. By minimising false alarms, the manufacturer can increase the reliability and credibility of the alarm system, ensuring that it only alerts for genuine break-ins.

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Answer:

I couldn't see the picture it is black

Step-by-step explanation:

the formula for the area of a trapezoid is:

[tex]\frac{b1+b2}{2} h[/tex]

insert 7 for b1, 13 for b2, and 10 for h

[tex]\frac{7+13}{2} 10[/tex]

100

Hope that helps

The solution is, the area of the trapezoid is: 100cm^2.

Area is the measure of a region's size on a surface. The area of a plane region or plane area refers to the area of a shape or planar lamina, while surface area refers to the area of an open surface or the boundary of a three-dimensional object.

here, we have,

given that,

A trapezoid has a height of 10 centimeters. One parallel base has a length of 7 centimeters, and the other parallel base has a length of 13 centimeters.

now, we know that,

the area of the trapezoid = 1/2 ( a+b)*h

so, substituting the values, we get,

the area of the trapezoid is:

= 1/2 (7+ 13) * 10

=10 * 10

=100

Hence, The solution is, the area of the trapezoid is: 100cm^2.

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Answer:

159.4

Step-by-step explanation:

I'm assuming that it's supposed to be 15x^3-12x^2 because when you copy and paste the "^" gets cut out

15*2.5^3 - 12*2.5^2 = 234.375 - 75 = 159.375

rounded is 159.4

The perimeter of the wood deck can be expressed, based on the length and width of the swimming pool to be 80 + 8c + 8w feet.

The perimeter of a rectangle is given by the formula 2x ( length + width ). With the walkway installed, the length becomes (28 + 2c) feet and the width becomes ( 12 + 2c ) feet.

Therefore, the length with the wood deck is ( 28 + 2c + 2w ) feet and the width with the deck is ( 12 + 2c + 2w ) feet.

The perimeter would therefore be:

P = 2 x [ ( 28 + 2c + 2w ) + (12 + 2c + 2w )]

P = 2 x [ 40 + 2c + 2w + 2c + 2w ]

P = 80c + 8 c + 8 w

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Answer:

x = 12

Step-by-step explanation:

3х+7 = 5x-17

-2x = -24

Answer:

Easy,

1) To find the area you need to multiply. Therefore 10 x 4 = 40 square centimeters.

2) 20, why? A calculator online for area of a triangle, it really helps! :) just look up triangle area in the future.

Step-by-step explanation:

Answer:

Step-by-step explanation:

There are 12 marbles in total with three of them being striped. The chance of pulling out a striped marble is 3/12 which can be reduced to 1/4. And 1/4 of 600 is 150.

To find the reflection of point P = (2, 6) across the y-axis, we need to change the sign of the x-coordinate while keeping the y-coordinate the same.

When reflecting a point across the y-axis, the x-coordinate becomes its opposite. Therefore, the reflected point R_y-axis (P) will have the coordinates (-2, 6).

So, R_y-axis (P) = (-2, 6).

Answer:

B

Step-by-step explanation:

Just put B

Answer:

its C

Step-by-step explanation:

Answer:

c. I believe

Step-by-step explanation:

because all of the other options dont go in a consistent order/pattern. C. matches the vertical side

please consider marking me as brainliest. as I explained my answer!

Please and thanks!

Answer:

Hi! The answer to your question is [tex]3.05[/tex]

Step-by-step explanation:

☆*: .｡..｡.:*☆☆*: .｡..｡.:*☆☆*: .｡..｡.:*☆☆*: .｡..｡.:*☆

☆Brainliest is greatly appreciated!☆

Hope this helps!!

- Brooklynn Deka

While factoring the given equation, the mistake occurred in Step 1 (option d.)

Upon reviewing the steps, we can see that the student made a mistake in Step 1. The factorization of the polynomial should be (x + 5)(x + 9), not (x + 5)(x - 9).

The correct factorization should be:

[tex]x^2 + 14x + 45 = (x + 5)(x + 9)[/tex]

The mistake occurred when the student incorrectly wrote (x - 9) instead of (x + 9) as one of the factors.

As a result, the subsequent steps are also affected. In Step 2, the student incorrectly set x - 9 = 0 instead of x + 9 = 0. This leads to an incorrect value in Step 3, where the student states that x = 9 instead of the correct value x = -9.

Therefore, the student made a mistake in Step 1, which caused subsequent errors in Step 2 and Step 3. The correct answer is d. The mistake occurred in Step 1.

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Answer:

4/5 to 80%

7/20 to 35%

9/4 to 225%

25/1000 to 2.5%

Step-by-step explanation:

To accurately complete the proof, the angles that can be filled in are: BCD and CDA; ABC and BAT.

Let's go step by step to understand why these angles are congruent. Given that segment AB is parallel to segment DC and segment BC is parallel to segment AD, we extend segment AB to point P above point B and extend segment AD to point T to the left of point A.

According to the Alternate Interior Angles Theorem, angles BCD (angle at point C) and CDA (angle at point D) are congruent. This is because these angles are formed by a transversal (segment AD) intersecting two parallel lines (AB and DC).

Next, applying the Corresponding Angles Theorem, angles ABC (angle at point A) and BAT (angle at point T) are congruent. This is because these angles are corresponding angles formed by a transversal (segment AB) intersecting two parallel lines (AD and BC).

By the Transitive Property of Equality, we can conclude that angle ABC is congruent to angle CDA. Therefore, opposite angles of parallelogram ABCD are congruent, and the proof is complete.

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Answer:

184 in²

Step-by-step explanation:

Given :

Width, w = 6 inches

Length, l = 10 inches

Height, h = 2 inches

To obtain how much wrapping paper is needed ; we take the surface area of the box

Surface area = 2(lw + lh + wh)

Surface area = 2((6*10) + (6*2) + (10*2))

Surface area = 2(60 + 12 + 20)

Surface area = 2(92)

Surface area = 184 in²

The amount of wrapping paper needed = 184 in²

Answer:

38.7

Step-by-step explanation:

[tex]\frac{sinA}{A}=\frac{sinB}{B}=\frac{sinC}{C}[/tex]

A, B and C are the sides of the triangle and sinA, sinB and sinC are the opposing angles

[tex]\frac{sin95}{43}=\frac{A}{27}[/tex]

[tex]A = sin^{-1} (\frac{27*sin95}{43} )=38.72018809[/tex]

The least nonnegative residue of 64!/52! modulo 13 is 4.

Wilson's theorem states that for any prime number 'p', the factorial of (p-1) is congruent to -1 modulo p. This can be written as (p-1)! ≡ -1 (mod p).

Using Wilson's theorem, we can find the least nonnegative residue modulo 89 for the integer 861.

For n = 861 and m = 89, we need to calculate (n mod m) as follows:

861 mod 89 = 861 - (89 * (861 // 89))

= 861 - (89 * 9)

= 861 - 801

= 60

Therefore, the least nonnegative residue of 861 modulo 89 is 60.

Now let's move on to the second part.

For n = 64!/52! and m = 13, we can simplify the expression using cancelation:

64!/52! = (64 * 63 * 62 * ... * 53 * 52!)/52!

Most of the terms in the numerator and denominator cancel out, leaving:

64 * 63 * 62 * ... * 53

To find the least nonnegative residue modulo 13, we can calculate the product of the remaining terms and take the result modulo 13.

(64 * 63 * 62 * ... * 53) mod 13 ≡ (11 * 12 * 1 * 2 * ... * 3) mod 13

≡ (11 * (-1) * 1 * 2 * ... * 3) mod 13

≡ (-11 * 1 * 2 * ... * 3) mod 13

Since (-11) ≡ 2 (mod 13), we have:

(-11 * 1 * 2 * ... * 3) mod 13 ≡ (2 * 1 * 2 * ... * 3) mod 13

Calculating the product, we find:

(2 * 1 * 2 * ... * 3) mod 13 ≡ 4 (mod 13)

Therefore, the least nonnegative residue of 64!/52! modulo 13 is 4.

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Answer:

15.98cm

Step-by-step explanation:

Given data

Volume= 602.88cm^3

Radius= 6cm

The formula for the volume of a cone is

V= 1/3 πr^2h

substitute

602.88= 1/3*3.142*6^2*h

602.88=1/3*3.142*36*h

602.88=37.704*h

h= 602.88/37.704

h= 15.98cm

Hence the height is 15.98cm

the number of favorable outcomes is 35 * 20475 = 716,625.

Probability = 716,625 / (35! / (7!(35 - 7)!)).

To determine the probability of winning the $10 prize by matching exactly three numbers, we need to calculate the total number of possible outcomes and the number of favorable outcomes.

The total number of possible outcomes can be calculated using combinations. Since we are selecting 7 numbers out of 35, the total number of possible outcomes is given by the combination formula:

C(n, r) = n! / (r!(n - r)!)

In this case, n = 35 (total numbers) and r = 7 (numbers selected). Substituting these values into the formula:

C(35, 7) = 35! / (7!(35 - 7)!)
= 35! / (7!28!)

The number of favorable outcomes is determined by choosing 3 winning numbers from the 7 numbers selected and 4 non-winning numbers from the remaining 28 numbers. The number of favorable outcomes can be calculated using combinations as well:

C(7, 3) * C(28, 4)

Substituting the values into the formula:

C(7, 3) * C(28, 4) = (7! / (3!(7 - 3)!)) * (28! / (4!(28 - 4)!))

Calculating these values:

C(7, 3) = 7! / (3!(7 - 3)!)
= 7! / (3!4!)
= (7 * 6 * 5) / (3 * 2 * 1)
= 35

C(28, 4) = 28! / (4!(28 - 4)!)
= 28! / (4!24!)
= (28 * 27 * 26 * 25) / (4 * 3 * 2 * 1)
= 20475

Therefore, the number of favorable outcomes is 35 * 20475 = 716,625.

Now, we can calculate the probability of winning the $10 prize by dividing the number of favorable outcomes by the total number of possible outcomes:

Probability = Number of favorable outcomes / Total number of possible outcomes
= 716,625 / C(35, 7)

Calculating this value:

Probability = 716,625 / (35! / (7!(35 - 7)!))

It is important to note that calculating the factorial of 35 might result in very large numbers, which may be computationally intensive. Alternatively, you can use numerical methods or estimation techniques to approximate the probability.

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Answer:

2

Step-by-step explanation:

because if 10 is the whole line of the base at the bottom of the trapezoid

and 8 is the whole top 10-8=2

Answer:

4

Step-by-step explanation:

We can do this problem by doing the absolute value of the difference between 2 and -2.

2-(-2)=4. Absolute value of 4 is 4.

Hope this helped.

~cloud

Answer:

4

Step-by-step explanation:

Answer:

The arc length is about 12.57.

Step-by-step explanation:

Formula for arc length: 2πr( degrees/360)

For ours lets do 2π8(90/360)

Simplify the 90 and 360: 16π(1/4)

This gives you: 16π/4

Divide by 4

You get: 4π

4π ≅ 12.57