The researcher draws a random sample using a Multistage cluster sample
At each stage, you use smaller and smaller groups (units) to select a sample from a population. National surveys are frequently used to collect data from a large, geographically dispersed group of people. To use as your sample, you randomly select individual units from the cluster.
In multistage cluster sampling, the population is divided into clusters and some clusters are chosen in the first stage. You continue to break up the selected clusters into smaller clusters at each subsequent stage, and you do this until you reach the final step. In the final step, only a few members of each cluster are chosen for your sample.
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What is the slope of the line that passes through the points (-6, 1) and (-6,-4)?
Write your answer in simplest form.
Answer:
The slope is undefined
Step-by-step explanation:
Zimak bought 3 xylobars and 5 yackities from the intergalactic Candy store for 1.75 Jeejuju paid 1.88 and got 4 xylobars and 1 yackity.How much would dado pay fir 1 xylobar and 2 yakities?
The amount that Dado will pay for 1 xylobar and 2 yakities is 1.779.
What is an equation?A mathematical equation is the statement that illustrates that the variables given. In this case, two or more components are taken into consideration to describe the scenario.
Zimak bought 3 xylobars and 5 from the intergalactic Candy. Let this be:
3x + 5y = 1.75
x = xylobars
y = yackities
Jeejuju paid 1.88 and got 4 xylobars and 1 yackity. Let this be:
4x + y = 1.88
Equate the equations and this will be:
4x + y = 1.88 ....... i
3x + 5y = 1.75 .... ii
From equation i y = 1.88 - 4x
Put this into equation ii
3x + 5y = 1.75
3x + 5(1.88 - 4x) = 1.75
3x + 9.4 - 30x = 1.75
Collect like terms
3x - 30x = 1.75 - 9.4
-27x = -7.65
Divide
x = 7.65 / 27
x = 0.283
xylobars = 0.283
Since 4x + y = 1.88
4(0.283) + y = 1.88
1.132 + y = 1.88
y = 1.88 - 1.132
y = 0.748
The cost for 1 xylobar and 2 yakities will be:
x + 2y
0.283 + 2(0.748)
= 0.283 + 1.496
= 1.779
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Find the measure of the complement for the angle 1 degree
89 degrees
Explanations:
The sum of an angle and its complement is equal to 90 degrees.
Let the measure of the complement be "x"
Given the information below:
Angle = 1 degrees
Taking the sum of the angle and its complement will give:
[tex]x+1^0=90^0[/tex]Subtract 1 from both sides
[tex]\begin{gathered} x+1-1=90-1 \\ x+0=90-1 \\ x=89^0 \end{gathered}[/tex]Therefore the measure of the complement for the angle given is 89 degrees
Please help me I don’t know it
Answer:
angle 4 and 5 are interior angles, and 3 and 6 as well
he altitude of a triangle is increasing at a rate of 3.000 centimeters/minute while the area of the triangle is increasing at a rate of 4.000 square centimeters/minute. at what rate is the base of the triangle changing when the altitude is 9.500 centimeters and the area is 88.000 square centimeters?
The altitude exists 9.500 centimeters and the area exists 88.000 square centimeters is [tex]$ -\frac{9.26316}{4.75d}[/tex].
What is meant by the altitude of a triangle?A line segment passing through a triangle's vertex and running perpendicular to the line containing the base is the triangle's height in geometry. The extended base of the altitude is the name given to this line that contains the opposing side. The foot of the altitude exists the point at where the extended base and the height converge.
A triangle's altitude is determined by drawing a perpendicular line from its vertex to its opposite side. The altitude, sometimes referred to as the triangle's height, forms a right-angle triangle with the base.
Let A be the area of the triangle
h be the altitude
b be the base
The formula that relates the three is the area of a triangle
A = (1/2) bh
Note that anything listed as a "rate" is a derivative value.
dh (rate of change of altitude) = 3.000 cm/min
dA (rate of change of area) = 4 cm²/min
h = 9.500 cm
A = 88.000 cm²
Consider that both b and h are changing in this situation, so we have to treat them both as variables. This means we have to use the product rule, inserting the derivatives where applicable.
dA = (1/2) × db × h + (1/2)b × dh
substitute the values in the above equation, we get
4 = (1/2) × db × 9.5 + (1/2) b × 3.000
88 = (1/2) × b × 9.5
b = 18.52631
Now, looking back at our derivative
4 = (1/2) × db × 9.5 + (1/2) × 18.52631 × 3.000
simplifying the above equation, we get
4 = 4.75 db + 13.26316
b =[tex]$ -\frac{9.26316}{4.75d}[/tex]
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find the product
6x/(-2)
Answer:
-12xy
The result of the expression given as 6x/(-2) is -3x
How to determine the product?From the question, the expression is given as
6x/(-2)
The above expression is a quotient expression
So, we start by rewritting it as a product
This is represented as
6x/(-2) = 6x * 1/(-2)
Remove the bracket
So, we have the following equation
6x/(-2) = 6x * 1/-2
Evaluate the product
6x/(-2) = -3x
Hence, the value of the expression is -3x
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can you please help me
We have to calculate the area and perimeter of ABC.
Area:
We can calculate the area by substracting from the area of the big triangle ABD the area of the little triangle BCD. Both are right triangles.
The area of ABD is:
[tex]A_{\text{ABD}}=\frac{b\cdot h}{2}=\frac{(15+5)\cdot12}{2}=\frac{20\cdot12}{2}=\frac{240}{2}=120[/tex]The area of BCD is:
[tex]A_{\text{BCD}}=\frac{b\cdot h}{2}=\frac{5\cdot12}{2}=\frac{60}{2}=30[/tex]Then, the area of ABC is:
[tex]A_{\text{ABC}}=A_{\text{ABD}}-A_{\text{BCD}}=120-30=90[/tex]The area of ABC is 90 cm^2.
Perimeter:
We calculate the perimeter by adding the length of the three sides. We know only 2 of the sides, so we have to calculate the other one (BC).
The length of BC can be calculated using Pythagorean theorem for the triangle BCD, so we can write:
[tex]\begin{gathered} BC^2=CD^2+BD^2=5^2+12^2=25+144=169 \\ BC=\sqrt[]{169}=13 \end{gathered}[/tex]Now, we can calculate the perimeter as:
[tex]P_{\text{ABC}}=AB+BC+AC=25+13+15=53[/tex]The perimeter is 53 cm.
find the number of terms in the sequence 1,-4,16,...,65536
Answer:
9 terms
Step-by-step explanation:
The sequence given is a geometric sequence
In a geometric sequence, the nth term of the sequence can be found by the formula
[tex]a_n = a_1r^{n-1}[/tex]
[tex]\text{where }\\\\ a_n = \text {nth term}\\\\\text{$a_1 = $ first term}\\\\\text{$r = $ common ratio}[/tex]
In the given sequence,
a₁ = 1
r = -4
aₙ = 65536
So we get the relation:
65536 = 1· (-4)ⁿ⁻¹
65536 = (-4)ⁿ⁻¹
It is clear that n-1 has to be even so that the power of 4 is positive.
Substituting x = n -1 where x is even gives us
4ˣ = 65536
If we take logarithms to the base 4 on both sides we get
=> x = [tex]\log_465536 = 8\\\\[/tex]
Since x = n - 1 and x = 8, n = 9
So the 9th term in the series is 65536
find the Length of an arcade of a circle whose central angle is 212° and radius is 5.3 inches. round your answer to the nearest tenth.
The length of the arc of the circle is 19.6 inches
We can find the length of the arc using the formula;
[tex]L\text{ = }\frac{\theta}{360}\text{ }\times\text{ 2}\pi r[/tex]where ;
[tex]\begin{gathered} \theta\text{ is central angle which is 212} \\ r\text{ is radius which is 5.3 inches} \end{gathered}[/tex]Substituting these values;
[tex]\begin{gathered} L\text{ = }\frac{212}{360}\text{ }\times\text{ 2 }\times\frac{22}{7}\text{ }\times\text{ 5.3} \\ \\ L\text{ = 19.618413} \\ \\ To\text{ the nearest tenth, this is 19.6 inches} \end{gathered}[/tex]stephan is reviewing the data on product returns for an online retailer. thus far, 3.5% of all sold units were returned. if stephan takes 200 sold unit records, what is the probability that at most 6 units were returned?
3.5% of all sold units have been returned so far. The probability that at most 6 units were returned out of 200 sold unit records is 0.7323.
Given that,
For an online store, Stephan is evaluating the data on product returns. 3.5% of all sold units have been returned so far.
We have to find what is the probability that at most 6 units were returned out of 200 sold unit records.
From binomial,
Binomial to normal approximations without continuity factor Sample size ,
n = 200
Probability of an event of interest,
p = 0.035
P(0<=n<=2)
=0.7323
Therefore, the probability that at most 6 units were returned out of 200 sold unit records is 0.7323.
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is 12 an integer? Im getting confused answers
Answer:
Yes 12 is an Integer
Step-by-step explanation:
12 is a whole number that can be written without a fractional component, thus 12 is an integer.
Carrie wants to make a wallpaper border to go around the top of her room. She wants the border to look something like the illustration below.
The answer is A Reflection
This question is answered
Since Carrie wants to make a wallpaper border to go around the top of her room. She wants the border to look something like the illustration below. This is a Reflection
What is transformation?A transformation is an operation that is performed on a picture. Transformations are classified into four types: translations, reflections, dilations, and rotations. In transformations, reflections are achieved by flipping a shape or figure across a line of reflection, a point of reflection, or a plane of reflection.
A reflection is referred to as a flip in geometry. A reflection is the shape's mirror image. The line of reflection is formed when an image reflects through a line. A figure is said to reflect another figure when every point in one figure is equidistant from every point in another figure.
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write the following statements as an algebraic expression or equation.you have twice as many apples as bananas.the choices are in the picture
ok
apples = a
babanas = b
a = 2b
NEEd HELP 9th grade asp
Answer:175/48
Step-by-step explanation:
The dial on a combination lock contains markings which represent the numbers from 0 to 39. How many 3- number combinations are possible if the first and the second must be different odd numbers, while the third number must not be an odd number?.
There are 64000 distinct combinations .
The dial for the standard combination lock is fastened to a spindle. The spindle travels through many wheels and a drive cam inside the lock. Every number has one wheel, hence the number of wheels in a wheel pack depends on how many numbers are in the combination.
The lock uses the numbers 0 to 39 and has 64,000 distinct combinations.
How many possible three-number combinations are there?
You have 10 options for the first digit, 9 options for the second digit, and 8 options for the third digit, giving you 10x9x8 = 720 if you want all three possible numbers with no duplication of the digits.
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assume that for any given day, the probability of a sunny day is 80%, the probability of getting free pizza is 30%, and the probability of getting free pizza on a sunny day is 35%. a. what is the probability of a less than ideal day (no free pizza and no sun)?
The probability of a less-than-ideal day (no free pizza and no sun) is 0.25
Let us define the events from the example.
Let event A: Sunny day for any given day
event B: Getting free pizza for any given day.
Now, we will translate the word problem into our symbols.
The probability of a sunny day is 80% i.e P(A)=0.8
The probability of free getting pizza is 30% i.e. P(B) = 0.3
The probability of free pizza and a sunny day is 35% .i.e P(A∩B) = 0.35
a)Complement means not happening an event i.e. event A’ : No sunny day for any given day event B’: Not getting day free pizza for any given.
Here dash ( ‘ ) complement.
The probability of a less-than-ideal day
(no free pizza and no sun) is
P(A'∩B') = P(A∪B)'... (De Morgan's Jaw)
De Morgan's law: (A∩B)'= A'∪B'
(A∪B)’ = A'∩B'
P(A'∩B') = 1-P(A∪B) (P(A) = 1-P(A)).
= 1-[P(A) + P(B)-P(A∩B)]
= 1-[0.8+0.3-0.35]
P(A'∩B') = 0·25
The probability of a less-than-ideal day (no free pizza and no sun) is 0.25.
b)To check whether free pizza and sun are independent events or not, let us see when two events are said to be independent.
Two events (A & b) are said to be independent if P(A∩B) = P(A)· P(B)
Let us check whether this property satisfies our case or not.
LHS = P(A∩B)=0.35
RHS= P(A) P(B)
= 0.8 x 0.3
RHS = 0.24.
LHS ≠ RHS
P(ANB) ≠ P(A). P(B) in our case.
Two events A and B are not independent in our case
Sun and free pizza are not independent events.
c)Probability of no free pizza on a sunny day is P(A∩B').
P(A∩B') = P(A) - P(A∩B) = 0.8 0.35
P(A∩B') = 0·45
The probability of no free pizza on a sunny day is 0.45
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In a certain tourism destination, 28% of the city's residents work in the hospitality industry. 55% of residents are age 40 or younger, and 15% of residents are people age 40 or younger who work in the hospitality industry. What percentage of the employed population are people older than 40 who do not work in the hospitality industry?
A. 13%
B. 17%
C. 32%
D. 45%
The percentage of the employed population are people older than 40 who do not work in the hospitality industry is B. 17%.
How to calculate the percentage?The city's residents work in the hospitality industry = 28%
The residents that are age 40 or younger, and 15% of residents are people age 40 or younger = 55%
Those who work in the hospitality industry that are younger than 40% = 15%
Therefore, those that don't work in the industry will be:
Percentage of 40 or older - Percentage of those working
= (100 - 55%) - 28%
= 45% - 28%
= 17%
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The line perpendicular to y=-3x+4 that passes through the point (-3,-7)
Answer:
Step-by-step explanation:
A perpendicular line will have a sope that is the negative inverse of the reference line. The reference line is y = -3 + 4, with a slope of -3. The negative inverse would be -(-1/3) or (1/3).
The new line will take the form of y = (1/3)x + b, where b is the y-intercept (the value of y when x=0). We want the new line to go through point (-3,-7). We;ll need a value of b that will make that happen. To find b, enter the given data point and solve for b:
y = (1/3)x + b for (-3,-7).
-7 = (1/3)(-3) + b
-7 = -1 + b
b = -6
The new equation is y = (1/3)x - 6
See the attached graph.
Is 4 a factor of 64? How do you know?
Answer: yes
Step-by-step explanation: 64 is a factor of 4 because you can multiply it by 16 to get 64. Remember if you divide and get a whole number it is a factor .
Jungkook has 84 coins. Of the coins, 7/12 are nickels, 3/12 are dimes, and the rest are quarters. What is the raito of Jungkook's nickels to dimes to quarters?
If 7 out of every 12 coins are nickles (7/12) and 3 out of every 12 coins are dimes (3/12), there has to be 2 quarters out of every 12 coins (2/12)
Now, the ratio would be:
[tex]7\colon3\colon2[/tex]Miss Davidson ran a sit-up competition among her P.E. students and monitored how many sit-ups each student could do. Number of sit-ups Number of students 76 3 79 5 175 2 X is the number of sit-ups that a randomly chosen student did. What is the expected value of X? Write your answer as a decimal.
Let the total number students be s. Then
s = 3 + 5 + 2= 10
x | Number of students(n) | Pr(x) | xPr(x)
---------------------------------------------------------------------------------
76 | 3 | 0.3 | 22.8
---------------------------------------------------------------------------------
79 | 5 | 0.5 | 39.5
--------------------------------------------------------------------------------
175 | 2 | 0.2 | 35
--------------------------------------------------------------------------------
[tex]\sum \text{xPr(x) = 22.8 + 39.5 }+\text{ 35 = 97.3}[/tex][tex]\text{ The expected value is }\sum \text{xPr(x)}[/tex]Therefore, the expected value of x is 97.3
PLEASE HELP
what is the value of x? justify each step
AC= 32
Depending on where it is in the number, each digit has a different value, which is referred to as value. We figure it out by multiplying the digit's place value by its face value. For illustration: If we take 45 into account. Here, the fourth digit is in the tens column.
Explain about the value?Value in mathematics is a number that represents the outcome of a computation or function. In the aforementioned example, you may inform your teacher that 5 + 6 Equals 30 or that x + y = 9 if x = 6 and y = 3. A variable or constant can also be referred to as a value.
X has a value of 3. The following is a list of the arguments made for each step.
Adding more line segments
Rule of substitution (b)
c) Simplifying by incorporating related terms
d) Compiling terms for lies
e) Multiplying each side by 8
AB = 2x
BC = 6x + 8
AC = 32
AB plus BC equals AC. (Extension rule)
addition of a line's individual segments
2x + 6x + 8 = 32 (Substitution rule) (Substitution rule)
replacing AB, BC, and AC in the formula AB + BC = AC
8x + 8 = 32 (Simplification) (Simplification)
2x + 6x + 8 = 32, simplified adding comparable terms
8x = 24 (Assembling similar terms)
8x = 32 - 8
8x = 24
x = 3 (Divide both sides by 8) (Divide both sides by 8)
8x / 8 = 24/8
x = 3
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Solve for .
4x4<8 AND 9x + 5 > 23
Answer:
solve for what? x or y? or anything another
Step-by-step explanation:
if x
1.
[tex] - \sqrt[4]{2} \sqrt[4]{2} [/tex]
2.
[tex]x = (2 \: or \: \infty )[/tex]
so hope it help
Approximate the value of each irrational number. Explain your reasoning.
Part A
√30
May Someone Please Give Me The Answers To The Problems I Haven’t Done (Please Mark Which Ones They Are)Thank You!!
The simplest form of the ratios are:
(A) 3/1 = 3(B) 6/2 = 3(C) 18/6 = 3(D) 36/12 = 3What are ratios?An ordered pair of numbers a and b, written as a / b, is a ratio if b is not equal to 0. A proportion is an equation that sets two ratios at the same value.For instance, you could write the ratio as follows: 1: 3 if there is 1 boy and 3 girls (for every one boy there are 3 girls).
So, the ratios in the simplest form are:
We can observe that the simplest form of all the ratios is similar which is 3.
Therefore, the simplest form of the ratios are:
(A) 3/1 = 3(B) 6/2 = 3(C) 18/6 = 3(D) 36/12 = 3Know more about ratios here:
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help me answer this question please
Answer:
sum = -15/2
Step-by-step explanation:
Given the formula for the n-th term of a sequence is n(n-8)/√(n+3), you want the sum of the 1st and 6th terms.
First termThe first term is found by substituting 1 for n:
1(1 -8)/√(1 +3) = 1(-7)/√4 = -7/2
Sixth termThe sixth term is found by substituting 6 for n:
6(6 -8)/√(6 +3) = 6(-2)/√9 = -12/3 = -4
SumThe sum of the first and sixth terms is ...
-7/2 +(-4) = -(7/2 +8/2) = -15/2
sum = -7 1/2
A parabola can be drawn given a focus of (7,-3) and a directrix of y=-7. Write
the equation of the parabola in any form.
Which of the following best estimates the sum 1 1 2 3 B 0.5 0.8
we have
1/2 +1/3
Remember that
1/2=0.5
1/3=0.33 -----> rounded 0.3
so
0.5+0.3=0.80
Answer: please help
Step-by-step explanation: I don’t know what the answer is I need help
question 8 a large hotel chain sees about 500 customers per week. a data analyst working there is gathering data through customer satisfaction surveys. they are anxious to begin analysis, so they start analyzing the data as soon as they receive 50 survey responses. this is an example of what? select all that apply.
The sampling strategy used in this problem is an example of:
Failing to include diverse perspectives in the collection.Failing to choose a large enough sample size.What is sampling?Sampling is when a subset of an entire population is studied, to verify whether characteristics of the sample can be expanded to the entire population.
The sample has to be representative of the population, that is, large enough, hence it should contain all the subsets of the population.;
In the context of this problem, the chain sees about 500 customers a week and they receive the responses from 50 of them. This is a not large enough sample size, hence it could cause biased results, meaning that the perspective of the entire population will not be considered.
In the context of this problem, the survey are anonymous, and the objective of a survey is generally not to reward the participants, hence the last two options are false.
What is the missing information?The options are given as follows:
Failing to include diverse perspectives in the collection.Failing to choose a large enough sample size.Failing to reward customers for participating in the survey.Failing to collect data anonymously.More can be learned about sampling at https://brainly.com/question/9910540
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Taylor and Emily are painting banners for their Halloween Party. Taylor’s banner is 8 inches tall and 564 inches wide. The area of Emily’s banner is 10 times as large as the area of Taylor’s banner. What is the area of Emily’s banner, in square inches?
Answer:
[tex]45120 in^2[/tex]
Step-by-step explanation:
Area of Taylor's Banner (AT): [tex]A_T = 8*564=4512 in^2[/tex]
Area of Emily's Banner (AE): [tex]A_E=10*A_T[/tex]
Plugging in AT: [tex]A_E = 10 * 4512 = 45120 in^2[/tex]
The Area of Emily's Banner is 45120 inch²
What is Area of rectangle?The Area of rectangle is the product of its length to its width.
i.e., Area of rectangle= length x width
Given:
Taylor’s banner : 8 inches tall and 564 inches wide.
Area of Taylor's Banner= l x w
= 8 x 564
= 4512 inch²
and, area of Emily’s banner is 10 times as large as the area of Taylor’s banner.
So, Area of Emil's Banner= 10 x 4512
= 45120 inch²
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