a sample is obtained from a population by grouping people according to age and then randomly selecting 5 people from each group. what type of sampling technique is this?

What is triangle?

A triangle is a three-sided polygon with three vertices. The triangle's internal angle, which is 180 degrees, is constructed.

The given information is an acute angle ∠A, and sides a and b, along with the height of the triangle h = b sin A. The criteria for the number of possible triangles that can be formed are as follows:

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Answer:

To solve this equation for the coefficient of the x term, we need to first simplify the equation by solving for x. 5x^2 + 3x - 2 = x/3 Multiplying both sides by 3 to eliminate the fraction, we get: 15x^2 + 9x - 6 = x Bringing all terms to one side: 15x^2 + 8x - 6 = 0 Now, we can use the quadratic formula to solve for x: x = [-b ± √(b^2 - 4ac)] / 2a where a = 15, b = 8, and c = -6 x = [-8 ± √(8^2 - 4(15)(-6))] / 2(15) x = [-8 ±

Answer:

You are correct

Step-by-step explanation:

Answer:

-5, -12

Step-by-step explanation:

We just have to find somthing colder than -4f so it has to be less than -4 so it would be -5 and -12.

The correct answers to your question would be -5 and - 15.

Answer: 1 and 5

Step-by-step explanation:

[tex]f(x) = (2/3)(x - 6)/(x + 3)[/tex]

Answer:

Sure, I can help you with that! To find the value of g(7), we simply need to substitute x=7 into the expression for g(x): g(7) = (7/8)*7 - 1/2 g(7) = 49/8 - 1/2 g(7) = 95/8 Therefore, g(7) = 95/8.

0 / 350

Answer:

9. The weights, in pounds, of five pumpkins from a pumpkin patch are 17, 18, 17, 15, and 13.

What is the MAD of the weights?

Step-by-step explanation:

9. The weights, in pounds, of five pumpkins from a pumpkin patch are 17, 18, 17, 15, and 13.

What is the MAD of the weights?

Surface area of this right triangular prism=96in²

A right triangular prism is a three-dimensional geometric shape that has two parallel triangular bases and three rectangular faces that connect the bases. The triangular bases of a right triangular prism are always perpendicular to its rectangular faces. The prism is called "right" because the rectangular faces meet the bases at right angles, meaning the edges connecting the triangular and rectangular faces form right angles.

In the given  right triangular prism

S₁=5in

S₂=5in

S₃=8in

l=4in

b=8in

h=3in

Total surface area of this right triangular prism = (S₁+S₂+S₃)l+(b×h)

=(5+5+8)×4+8×3

=96

Hence, surface area of this right triangular prism=96in².

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Tone's new monthly payment is 16.16% higher than his old monthly payment To solve the problem, we need to use the formula for the monthly payment of a mortgage loan:

monthly payment = (loan amount x monthly interest rate) / (1 - (1 + monthly interest rate)^(-n))

where:

loan amount = the amount of the loan

monthly interest rate = the annual interest rate divided by 12

n = the total number of payments (in months)

Let's first find the loan amount at the beginning of the mortgage. We know that Tone paid $9.99 per thousand, so we can set up a proportion:

$9.99 / 1000 = monthly payment / loan amount

Solving for the loan amount, we get:

loan amount = monthly payment / ($9.99 / 1000) = $1000 * (monthly payment / $9.99)

Substituting the given values, we get:

loan amount = $1000 * (monthly payment / $9.99) = $55,000

This means that Tone borrowed $55,000 at the beginning of the mortgage.

Now, let's find the old monthly payment. We know that Tone had a 10.5% adjustable rate mortgage for 30 years, which means he made 12 x 30 = 360 monthly payments. We can use the formula above to solve for the monthly payment:

monthly interest rate = 10.5% / 12 = 0.00875

n = 360

monthly payment = ($[tex]55,000 x 0.00875) / (1 - (1 + 0.00875)^(-360)[/tex]) = $512.47

Therefore, Tone's old monthly payment was $512.47.

Next, let's find the new monthly payment. We know that Tone will renew his mortgage at 12.5% interest rate, which means the new monthly interest rate is:

monthly interest rate = 12.5% / 12 = 0.01042

We also know that Tone will pay $10.68 per thousand, so we can set up a new proportion:

$10.68 / 1000 = new monthly payment / loan amount

Solving for the new monthly payment, we get:

new monthly payment = $10.68 / ($1000 / $55,000) = $595.40

Therefore, Tone's new monthly payment is $595.40.

Finally, let's find the percent increase in the new monthly payment compared to the old monthly payment. We can use the percent change formula:  

percent increase = ((new value - old value) / old value) x 100%

Substituting the given values, we get:

percent increase = (($595.40 - $512.47) / $512.47) x 100% = 16.16%

Therefore, Tone's new monthly payment is 16.16% higher than his old monthly payment

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the mean of 41, 52, 56, 65, 65, 76, and 89 is 63.43.

Step-by-step explanation:

The triangles ABE and CED are similar in figure 1 by SAS similarity criteria whereas in figure 2 the triangles PST and RPQ are not similar.

The triangles are similar if all angles in one triangle are congruent to corresponding angles in other triangle and sides are proportional. There are different criterias for similarity of triangles namely SSS, SAS, ASA/AAS and RHS. According to the criteria/rule

SSS(SIDE-SIDE-SIDE):triangles are similar, if all three sides of one triangle are proportional to the three sides of another triangle.

SAS(SIDE-ANGLE-SIDE):The b are similar if two sides are proportional and an angle included  is congruent to two sides and included angle of another triangle.

ASA(ANGLE-SIDE-ANGLE):The triangles are similar if two angles are equal and an side between the angles is proportional  to the two angles and side between the angles of another triangle.

Q13) Consider ΔABE and ΔCED ,

∠AEB = ∠CED = 90°

and,

AE=21 units ;BE= 26+16=42 units

CE=16 units ; ED=32 units

and

∴ Sides are proportional

Hence ΔABE is similar to ΔCDE by SAS criteria.

Q14)Consider triangles ΔPQR and ΔPST,

Given that ∠QPT=42°, and PR bisects ∠QPT

∴∠QPR=∠RPT=21°

Given that ∠PTS=102°,

In ΔPST, by angle sum property of triangle:

∠SPT+∠PTS+∠TSP=180°

21 + 102 + ∠TSP=180°

∠TSP=180° - 102 -21

∠TSP=57°

Given that ∠PRQ=58°

In ΔPRQ, by angle sum property of triangle:

∠RPQ+∠QRP+∠PQR=180°

21 + 58 + ∠PQR=180°

∠PQR=180°- 58 - 21

∠PQR=101°

In  ΔPRQ the three angles are 21°,101° and 58° whereas in ΔPST the three angles are 21°,102° and 57°. As the angles are not congruent, the triangles are not similar.

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The total length of the parallelogram-shaped cross-country course is equal to 26 miles.

We can calculate the total length of the cross-country course using the formula for the perimeter of a parallelogram, which is twice the sum of the lengths of its adjacent sides. In this case, the adjacent sides are the base of length 7 mi and the side of length 6 mi.

So, we can find the total length by first finding the sum of these two sides:

7 mi + 6 mi = 13 mi

Then, we can multiply this sum by 2 to get the total length:

2 x 13 mi = 26 mi

Therefore, the total length of the cross-country course is 26 miles.

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Answer:

Sure! To find the diameter of the garden, we can use the formula: circumference = π x diameter Given that the circumference of the garden is 39.25 feet and π is approximately 3.14, we can plug in the values and solve for diameter: 39.25 = 3.14 x diameter diameter = 39.25 ÷ 3.14 diameter ≈ 12.5 feet (rounded to the nearest hundredth) Therefore, the approximate diameter of the garden is 12.5 feet.

The equation to model the statement is [tex]-8(y + 3) = 32[/tex] and the value of y is -7.

An equation is the statement of two expressions located on two sides connected with an equal to sign. The two sides of an equation is usually called as left hand side and right hand side.

Given statement is the product of – 8 and [tex](y + 3)[/tex] is 32.

Product means the operation is multiplication.

So the equation can be written as,

[tex]-8 (y + 3) = 32[/tex]

Dividing both sides by 8,

[tex]-(y + 3) = 4[/tex]

[tex]y + 3 = -4[/tex]

[tex]y = -4 - 3 = -7[/tex]

Hence the value of y is -7.

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Given:

The number rounded to the nearest tenth is 59.6.

To find:

The approximate value of the given number to the nearest tenth.

Solution:

The required values shown in the below table:

Number               Nearest tenth                                    

59.58333333             59.6

a. The time at which the population is at a maximum is 25 hours. b. The maximum population is 1,182,500.

A polynomial function of degree 2 is a quadratic function, while one of degree 1 is a linear function. The formula for a quadratic function is f(x) = ax² + bx + c, where a, b, and c are constants and an is not equal to 0. A parabola, a U-shaped curve, is the graph of a quadratic function. Depending on the sign of the leading coefficient, the function's minimum or maximum value is located at the parabola's vertex.

a) The highest value of the population function, which is a quadratic function with a negative leading coefficient, occurs near the parabola's vertex.

Thus, t = -b/2a.

Substituting the values  a = -1698, b = 85,000, and c = 10,000 we have:

t = -85000 / 2(-1698) = 25

Therefore, the time at which the population is at a maximum is 25 hours.

b) To determine the maximum population we substitute the value of t = 25.

p(25) = -1698(25)² + 85,000(25) + 10,000 = 1,182,500

Therefore, the maximum population is 1,182,500.

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Answer:

D. [tex]\sqrt{3}[/tex] ; 2

Hope this helps!

Step-by-step explanation:

(a) The probability of having at least 10 defective chips is approximately 0.9131. (b) The probability of having between 15 and 20 defective chips is approximately 0.4135.

First, we need to find the mean (μ) and standard deviation (σ) for the binomial distribution.
μ = np = 500 * 0.03 = 15
σ = sqrt(np(1-p)) = sqrt(15*0.97) ≈ 3.66

(a) To find the probability of at least 10 defective chips, we'll calculate the Z-score and use a Z-table:

Z = (X - μ) / σ = (10 - 15) / 3.66 ≈ -1.36

P(X ≥ 10) = 1 - P(X ≤ 10) = 1 - 0.0869 = 0.9131

So, the probability of having at least 10 defective chips is approximately 0.9131

(b) To find the probability of between 15 and 20 defective chips (inclusive), we'll calculate the Z-scores and use a Z-table:

Z1 = (15 - 15) / 3.66 ≈ 0

Z2 = (20 - 15) / 3.66 ≈ 1.36

P(15 ≤ X ≤ 20) = P(Z1 ≤ Z ≤ Z2) = P(0 ≤ Z ≤ 1.36) = 0.4135

So, the probability of having between 15 and 20 defective chips is approximately 0.4135.

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Answer:

The measure of angle 14 is 83°.

Step-by-step explanation:

Angles 6 and 14 are congruent so if angle 6 is 83° so is angle 14.

To multiply 7(b-5)(b-4), you can follow these steps:

1.

Start by distributing the 7 to the terms inside the parentheses:

7(b-5)(b-4) = 7 * b * (b-4) - 7 * 5 * (b-4)

2.

Simplify each term using the distributive property:

= 7b^2 - 28b - 35b + 140

3.

Combine like terms:

= 7b^2 - 63b + 140

So, the final answer is 7b^2 - 63b + 140.

The value of f(11) for the recursive rule and an explicit rule is 149.

An arithmetic sequence is a set of integers where each term is created by multiplying the preceding term by a fixed amount (referred to as the common difference). The nth term is often indicated by an, while the first term of the series is typically marked by a1. The following formula is used to determine the nth term in an arithmetic sequence:

a = a1 + (n-1)d

where d is the common distinction. In mathematics and other disciplines, arithmetic sequences are frequently employed to represent circumstances in which the pace or degree of change remains constant.

The recursive and explicit rule for the arithmetic sequence is given as:

an = a1 + (n-1)d

From the given graph f(1) = 19 and common difference = 32 - 19 = 13

The recursive rule is:

f(n) = f(n-1) + 13

The explicit rule is:

f(n) = 19 + 13(n-1)

Now, f(11) is calculated as:

f(11) = 19 + 13(11-1) = 19 + 130 = 149

Hence, the value of f(11) for the recursive rule and an explicit rule is 149.

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AB thus has a 12 unit length as the triangle ABE is a right triangle with hypotenuse AE and legs AB and 5 in length.

A closed triangle is a two-dimensional geometric shape having three straight edges and three angles. The shorter of a triangle's two sides is known as the hypotenuse, while its long sides are known as the triangle's legs. The longest side's opposing angle is referred to as the greatest or "opposite" angle in triangles. Angles are given names based on where they are in relation to the sides. An essential component of geometry is the study of triangles, and there are numerous varieties with distinctive characteristics. An equilateral triangle, on the other hand, has three equal edges and 3 equal angles that are each 60 degrees in length. A right triangle, for instance, has one angle that is 90 degrees in length.

given

The Pythagorean theorem can be used to determine the length of AB.

We can see from the diagram that triangle ADE is a right triangle with hypotenuse AE and legs measuring 12 and 5 (DE - AE = AD = 13 - 8 = 5). Well, here we are:

[tex]AD^2 + DE^2 = AE^2\\AE^2 = 5^2 + 12^2\\AE^2 = 169[/tex]

AE = 13

In a similar way, we can observe that triangle ABE is a right triangle with hypotenuse AE and legs AB and 5 in length. Well, here we are:

AB2 = 169 - 25 when AE2 = AB2 + BE2 132 = AB2 + 5

AB^2 = 144

AB = 12

AB thus has a 12 unit length as the triangle ABE is a right triangle with hypotenuse AE and legs AB and 5 in length.

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Answer:

To calculate the distance or length of XY, YZ, and XZ, we can use the distance formula: Distance = √[(x2 - x1)^2 + (y2 - y1)^2] For XY: Distance = √[(7 - 7)^2 + (5 - 0)^2] Distance = √[0 + 25] Distance = √25 Distance = 5 units For YZ: Distance = √[(0 - 7)^2 + (5 - 5)^2] Distance = √[49 + 0] Distance = √49 Distance = 7 units For XZ: Distance = √[(0 - 7)^2 + (5 - 0)^2] Distance = √[49 + 25] Distance = √74 Therefore, the length

Our first equation yields p = 0. We obtain q = 3p = 0 by substituting this in the second equation. Hence, p = q = 0. As a result, the values of p and q are both zero.

A polynomial is a mathematical equation composed of variables and coefficients that is solved using mathematical operations like combination, deletion, multiplication, and quel integer exponents.

given

The result of dividing the same polynomial by x + 2 is

(p[tex]x^{2}[/tex] + (2p-q)x + (5q-2))(x+2) + (q[tex]x^{3}[/tex] + q[tex]x^{2}[/tex]+ 4[tex]x^{2}[/tex]) (12p-9q-2)

p+2q-2 = 12p-9q-2

When we simplify this equation, we obtain:

11p + 2q = 0

=> 3p - q = -4 (by adding 22p to both sides and multiplying both sides by 2)

Now, we also understand that the polynomial, when divided by x – 2, leaves a remainder of -18. Synthetic division or polynomial long division yields the following results:

= (p (x-2)³ + (7p-2q)(x-2) (x-2)² + (18q-8p)(x-2)) - 18

When we compare coefficients, we find:

p = 7p - 2q = 18q - 8p = 0

Our first equation yields p = 0. We obtain q = 3p = 0 by substituting this in the second equation. Hence, p = q = 0. As a result, the values of p and q are both zero.

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The volume of the solid generated by the revolution is 33.5 cubic units.

It is given that, the diameter of the semi-circle is 4 and it is rotated to one full rotation around its diameter.

A solid generated when a semicircle is being rotated about its diameter is called a "SPHERE".

Therefore, the volume of the solid generated by the revolution is the volume of the sphere.

The formula for the volume of the sphere is given by,

Volume of sphere = (4/3)πr³

where r is the radius and π has the default value of 3.14

Here, the given diameter is 4.

To find the radius = diameter/2

radius = 4/2 = 2.

Now, to calculate the volume of the sphere substitute r=2 and π=3.14

volume of the sphere = (4/3)×3.14×2³

⇒ (4/3)×3.14×8

⇒ 100.48 / 3

⇒ 33.49 (approximately 33.5)

Therefore, the volume of the solid generated by the revolution is 33.5 cubic units.

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The probability that no two adjacent people would stand is option C: 49/256, as there are 256 distinct counting rotations.

First, we assume that one person stands up. There are 8 possible ways to select which person does. We can, next, assume that no two adjacent people stand up. There are 4 ways to choose which of the remaining 7 people will stand up (since no two adjacent people can stand up).

Then, we can assume that no two adjacent people stand up again. There are 3 ways to choose which of the remaining 6 people will stand up (since no two adjacent people can stand up).

We continue this process until there is only one person left who can stand up.

The number of arrangements according to the number of people standing.

Therefore, the number of arrangements that no two adjacent people will stand.

n(S) = 1 + 8 + 20 + 16 + 2 + 2 = 49

The total number of possible outcomes is:

2⁸ = 256

So, the probability that no two adjacent people will stand would be:

= 49/256.

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Complete question is:

Eight people are sitting around a circular table, each holding a fair coin. All eight people flip their coins and those who flip heads stand while those who flip tails remain seated. What is the probability that no two adjacent people will stand?

(a) 47/256

(b) 3/16

(c) 49/256

(d) 25//128

(e) 51/256

Step-by-step explanation:

The given attachments are the steps to getting the answer...

Based on the given data, there are a total of 13 packets and 5 of them are spicy. Therefore, the probability that the next packet Cooper pulls out of the box will be spicy is 5/13 or approximately 0.385 (rounded to three decimal places).

To calculate the probability of the next packet being spicy, we need to know how many packets of each flavor are in the box. Assuming that Cooper doesn't put back the packets he has pulled out, we can count the number of spicy packets and divide it by the total number of packets he pulled out.

In this case, out of the 13 packets he pulled out, 5 were spicy. Therefore, the probability of the next packet being spicy is 5/13, or approximately 0.38, or 38%. However, if the box is refilled with packets of different flavors, this probability may not hold.

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Answer: 4/13

Step-by-step explanation: i did this IXL and this was the correct answer

A nurse should empty a Hemovac wound suction device when it is half full to ensure proper functioning and prevent discomfort or injury to the patient due to the device becoming too heavy.

The rationale for a nurse to empty a Hemovac wound suction device when it is half full is to ensure the device is functioning correctly and to prevent it from becoming too heavy and potentially causing discomfort or injury to the patient.

When a Hemovac wound suction device is half full, it may start to lose suction, which can result in less efficient drainage of fluid from the wound site. By emptying the device, the nurse can ensure that the device is functioning correctly and that the suction pressure is maintained.

Additionally, allowing the device to become too full can make it heavy and uncomfortable for the patient, potentially causing discomfort or injury to the wound site. Therefore, emptying the device when it is half full can help prevent these complications and ensure that the patient remains comfortable throughout the healing process.

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Answer:  The probability that Travis will choose a mystery book is 1/3.

Step-by-step explanation: To find the probability that Travis will choose a mystery book, we need to determine the ratio of the number of mystery books to the total number of books on Travis's shelf.

Travis has 6 mystery books, and the total number of books on his shelf is 6 + 5 + 4 + 3 = 18.

Therefore, the probability (in fraction form) that Travis will choose a mystery book is 6/18.

To simplify this fraction, we can divide both the numerator and denominator by their greatest common divisor, which is 6.

6 ÷ 6 = 1

18 ÷ 6 = 3

So, the simplified fraction is 1/3.