Answer:
2/10
Step-by-step explanation:
add the numbers and minus
Eating Together. In December of 2001, 38% of adults with children under the age of 18 reported
that their family ate dinner together seven nights a week. In a recent poll, 403 of 1122 adults
with children under the age of 18 reported that their family ate dinner together seven nights a
week. Has the proportion of families with children under the age of 18 who age dinner together
seven nights a week decreased? To answer this question, conduct a hypothesis test using the
a = 0. 05 level of significance. Round values for the sample proportion and p-value to three
decimal places
Fewer families with kids under 18 now have dinner together seven nights a week
Given,
Let p represent the percentage of households with kids under 18 that have supper together every night.
So, Null Hypothesis, : p 38% (meaning that more or the same number of families with children under the age of 18 now have dinner together seven nights a week.)
Alternate Hypothesis, : p < 38% {means that the proportion of families with children under the age of 18 who eat dinner together seven nights a week has decreased}
The test statistics that will be used here is One-sample z-test for proportions;
T.S. = ~ N(0,1)
Where,
p = sample proportion of families = 403/1122 = 0.36
n = sample of adults with children under the age of 18 = 1122
So,
The test statistics = -1.32
The value of z-statistics is -1.32.
Also, the P-value of the test statistics is given by;
P-value = P(Z < -1.32) = 1 - P(Z 1.32)
= 1 - 0.9066 = 0.0934
We have enough data to reject our null hypothesis since the test statistics will fall in the rejection region because the P-value for our test statistics is less than the level of significance, which in this case is 0.0934 < 0.10.
As a result, we draw the conclusion that fewer families with children under the age of 18 now have supper together seven nights a week.
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Which tatement are true about the line of ymmetry of a regular pentagon? Select three option
The correct option for the lines of symmetry of a regular pentagon-
C: Every line bisects a vertex angle.D: Every line bisects a side.E: Every line is perpendicular to a side.Explain the term regular pentagon?When a form can be folded or the folded portion sits perfectly on top so that all other edges match when the perpendicular line goes through at one vertex to the center of one side, the shape has a line of symmetry.Now that we have established what a line of symmetry is, we can infer that a pentagon has five sides and, thus, five lines of symmetry.An image of a pentagon's five lines of symmetry is included below.
We can observe from the following photo that the lines for symmetry cut through a vertex angle, a side, and are perpendicular to either a side.
Options C, D, and E are the appropriate choices.
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Complete question is;
Which statements are true about the lines of symmetry of a regular pentagon? Check all that apply.
A) Every line connects two vertices.
B) Every line connects the midpoints of 2 sides.
C) Every line bisects a vertex angle.
D) Every line bisects a side.
E) Every line is perpendicular to a side.
Write [tex]\frac{x^{2} - 5 }{x} + \frac{x + 8}{x-1}[/tex] as a single fraction.
The given expression can be simplified as (x³ + 3x + 5)/(x² - x).
How to add two fractions?If the fractions have the same denominators then their numerators are added keeping the denominators as the same.
For fractions with different denominators the LCM of the denominators are taken then that is divided by the numerators of each fraction and the number obtained is multiplied to each of them to get the equivalent fraction.
The given expression is as below,
(x² - 5)/x + (x + 8)/(x - 1)
It can be simplified as follows,
(x² - 5)/x + (x + 8)/(x - 1)
= ((x² - 5)(x - 1) + x(x + 8))/(x(x - 1))
= ((x³ - x² - 5x + 5) + x² + 8x)/(x² - x)
= (x³ + 3x + 5)/(x² - x)
Hence, the given expression can be written in the form of single fraction as (x³ + 3x + 5)/(x² - x).
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which is the inverse of graph f
Answer: the one in blue
Step-by-step explanation:
1. -2x² = -72
2. x² + 8 = -41
3. (2y - 3)² = 49
4. 4y² - 80 = 0
[ Solve the following quadratic Equations by extracting the square roots.] with solutions you can write in on paper:)
What is the difference between survey and experiment?
The main difference between experiment and survey is that experiment is laboratory research and survey is field research. Experiments are used to prove theories or hypotheses. Surveys are used to understand the notions of a group of people.
Select the correct answer. The average rate of change of f(x) is given by the formula . Over what interval does this formula give the average rate of change for f(x)? A. [4, 7] B. [-7, 3] C. [3, 7] D. [3, 4]
Answer:
34
Step-by-step explanation:
hope u new it have fun hsm s
Endure all, a manufacturer of batteries claims that the lifetime of their batteries is normally distributed with a mean of 500 hours and a standard deviation of 40 hours. What is the probability that an endure all battery selected at random will last more than 550 hours?.
An Endure chosen randomly the likelihood of any battery lasting longer than 550 hours is 10.56%.
What does z score mean?An indicator of how nearly a value relates to the mean of either a set of values is called a Z-score.Z-score is quantified using standard deviations relative to the mean.The data point's entire score is equal to the mean score when the Z-score is 0.The amount that the raw score departs first from mean is determined using the Z score.These steps are used to determine the Z score:
z = (x - μ)/σ
As mentioned in question-
x > 550 and μ = 500, σ = 40:
z = 550 - 500 / 40
z = 1.25
Obtain the p-value from normal distribution chart,
P(z > 1.25) = 1 - P(z < 1.25)
P(z > 1.25) = 1 - 0.8944
P(z > 1.25) = 0.1056
Thus, an Endure chosen at random the likelihood of any battery lasting longer than 550 hours is 10.56%.
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In the formula /=P-r-t, what does r stand for?
Answer:
The letter [tex]r[/tex] in the given formula represents the rate of interest.
Explanation:
Where I is the amount of interest, P is the principal (amount of money borrowed), r is the interest rate (per year), and t is the time (expressed in years).
Hope this helps!
how many ways are there to arrange the letters in the word mississippi so that either all the is are consecutive or
The required number of ways to arrange the letters in the word mississippi so that either all the is are consecutive are 11!/4!2!4!..
What is factorial?factorial, in science, the result of all certain whole numbers not exactly or equivalent to a given positive whole number and meant by that whole number and an interjection point. Subsequently, factorial seven is composed 7!, meaning 1 × 2 × 3 × 4 × 5 × 6 × 7. Factorial zero is characterized as equivalent to 1.
According to question:We have,
All out no. of words = 11
Had all letters been unmistakable, the response would have been =11!. However, as it isn't the case we want a method for diminishing it to consider the way that a portion of its letter sets are same.
In each game plan of the expressions of "mississippi" :
There are 4 S's which can be improved in 4! ways.Same thing with the I's , andTwo P's which can be improved in 2! waysPresently taking into truth the over three focuses decrease 11! by separating it by 4!2!4! also, you have your response.
Thus, required arrangement is 11!/4!2!4!.
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For what value of x is line m parallel to n?
Answer: X is equal to 21
Step-by-step explanation:
Answer:
25 degrees
Step-by-step explanation:
5x - 10 = 115
5x = 115 + 10
5x = 125
5/5 x = 125/5
x = 25
For each of the described curves, decide if the curve would be more easily given by a polar equation or a Cartesian equation. Then write an equation for the curve. (a) A circle with radius 2 and center (3, 2).
(b) A circle centered at the origin with radius 1.
The equation of circle for both the parts will be as,
(a) (x-3)² +(y-2)²= 4
(b) x²+y² = 1
What is circle?
A circle may be a form consisting of all purposes in a very plane that ar at a given distance from a given point, the centre. Equivalently, it's the curve copied out by a point that moves in a very plane so its distance from a given point is constant.
Main Body:
(a) When the circle is offset from the origin, the equation for the radius gets messy. In general, it will be the root of a quadratic equation in sine and cosine, not easily simplified. The Cartesian equation is easier to write.
Circle centered at (h, k) with radius r:
(x -h)² +(y -k)² = r²
The given circle is ...
(x -2)² +(y -2)² =2²
(x -2)² +(y -2)² = 4
__
(b) When the circle is centered at the origin, the radius is a constant. The desired circle is most easily written in polar coordinates:
x²+y² = 1
Hence the equation of circle is such.
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Ella has 23 red blocks and 41 green blocks. She will use all of the blocks to build 8 equal towers.
Answer:
8
Step-by-step explanation:
23:41
41+23=64
64/8=8
Let n be the number of trials and p be the probability of success in the binomial distribution. Under which conditions do the Binomial and Poisson distributions give approximate results? n → [infinity], p → 0 n → [infinity], p → 1 n → 0, p → 0 n → 0, p → 1
Under the Binomial and Poisson distributions gives approximate result is p → 0 n → ∞.
One of the common discrete distribution which is used in Statistics is the Binomial distribution. The Binomial distribution often deals with two types of situations, first, the occurring of an event and second, the non-occurring of an event termed respectively as success and failure. The Binomial distribution can be typically characterized by the two parameters namely “n” and “p” where “n” represents the number of trials and “p” represents the fixed probability of occurring of the desired event.
Further, the Binomial distribution can be visualized as an approach to determine the probability of observing a specified number of successes in a specified number of trials. The typical examples of Binomial distribution in our day-to-day life may include the survival of number of cancer patients, from the treatment offered, over a specified period of time;
Winning the number of seats against the number of candidates filed by a certain political party for an election;
Number of people benefiting from a certain house scheme when applied;
Number of covid patients discharged within three days from the hospital after their admission to a hospital for the treatment.
There is another discrete distribution which is equally popular as the Binomial distribution is the Poisson distribution. While the Binomial distribution deals with the number of trials and the probability of a success, Poisson distribution deals with the average number of successes per day or the number of successes observed per unit of time.
Unlike, in the case of a Binomial distribution, for a Poisson distribution, the knowledge of number of trials to get the observed number of successes is not required. The Poisson distribution has only one parameter namely “m” the mean number of successes per given unit of time.
The Poisson distribution is often taken as a limiting case of Binomial distribution, under the following conditions.
The number of trails is indefinitely large i.e., n → ∞
The probability of success, “p” is very small i.e., p → 0
np is finite i.e., np = m where p = m/n and q = 1 – m/n and m > 0.
However, it is not defined if “n” is large means how large and “p” is closed to zero means how small? It is left to the readers to assume how large n should be and how small p should be? As mentioned earlier, the Poisson distribution is often described as a limiting case of Binomial distribution.
Based on the results of the study , published by me clearly proves that even when 10 ≤ n ≤50 and p ≤ 0.2, the Poisson distribution can be a good approximation to Binomial distribution.
Hence the answer is Under the Binomial and Poisson distributions gives approximate result is p → 0 n → ∞.
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how many such tests would it take for the probability of committing at least one type i error to be at least 0.7? (round your answer up to the next whole number.)
The number of tests that it would take for the probability of committing at least one type I error to be at least 0.7 is 118 .
In the question ,
it is given that ,
the probability of committing at least , type I error is = 0.7
we have to find the number of tests ,
let the number of test be n ,
the above mentioned situation can be written as
1 - P(no type I error is committed) ≥ P(at least type I error is committed)
which is written as ,
1 - (1 - 0.01)ⁿ ≥ 0.7
-(0.99)ⁿ ≥ 0.7 - 1
(0.99)ⁿ ≤ 0.3
On further simplification ,
we get ,
n ≈ 118 .
Therefore , the number of tests are 118 .
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my last try anone willing to help
Logarithmic function log₍ₓ₊₂₎(4) = 3x can be written in exponential form as 4 = 3x ⁽ˣ⁺²⁾
Which property of log function is used?
The properties of log are nothing but the rules of logarithms and these are derived from the exponent rules.
These properties of logarithms are used to solve the logarithmic equations and to simplify logarithmic expressions.
A log function can be written in exponential form using
logₐ m = x ⇒ m = ax
According to the given question:
The given logarithmic function is
log₍ₓ₊₂₎(4) = 3x
On applying the property we get
4 = 3x ⁽ˣ⁺²⁾
Hence the required exponential form is 4 = 3x ⁽ˣ⁺²⁾
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a fair coin is flipped 10 times and the number of heads is counted. this procedure of 10 coin flips is repeated 100 times and the results are placed in a frequency table. which of the frequency tables below is most likely to contain the results from these 100 trials?
This table illustrates how many trials out of 100 resulted in each number of heads out of ten flips. Because it precisely depicts the possibility of each occurrence, this frequency table is the most likely to include the outcomes of the 100 trials.
The likelihood of receiving any number of heads out of ten flips is the same in a fair coin flip, therefore the table should show a fairly uniform distribution of trials across each number of heads. Overall, the frequency table most likely to capture the outcomes of the 100 trials has the number of heads out of 10 flips as rows and the number of trials out of 100 as columns.
This table may be used to precisely depict the data as well as determine the likelihood of each occurrence.
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There are 207 students in the 9 classes at East Middle School. At this rate, how many students are in 6 classes?
1: 54 students
2: 138 students
3: 69 students
4: 250 students
There are 207 students in the 9 classes at East Middle School. At this rate, how many students are in 6 classes?
1: 54 students
2: 138 students
3: 69 students
4: 250 students
207 / 9 = 23
23 * 6 = 138
Which congruency theorem can be used to prove that △ghl ≅ △khj? sss asa sas aas
We can prove that the given triangles GHL and KHJ are congruent using the ASA theorem. So, the second option is the correct answer.
We can say any two shapes are congruent if they have the same shape and size. For this, their sides and angles need to be mirror images of each other. We have four congruency theorems at hand here. These are side-side-side(SSS), angle-side-angle(ASA), side-angle-side(SAS), and angle-angle-side(AAS).
According to the ASA congruency theorem, one side and two angles of the triangles in question need to be similar. In the given image, we can see that two of the angles i.e., HGL and HKJ are congruent while GHL and KHJ are congruent. The sides GH and KH are also congruent. This makes the two triangles △GHL ≅ △KHJ by the ASA theorem. So, the second option is the correct answer.
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please help meeeeeeeeeeeeeeeeeee
Answer:
6, 7, 10
Step-by-step explanation:
7 > x - 4 ( add 4 to both sides )
11 > x , then
x < 11
the values from the table which are solutions are 6, 7, 10
Answer:
Answer is 11
Step-by-step explanation:
7+4>z-4+4
11>z
9. Melissa's front door is 36 inches by 82 inches. She bought a circular table that has a diameter of 91 inches. Will the table fit through the front door? Explain (Show your work).
Answer:
no it wont
Step-by-step explanation:
Draw a picture to show why this equation is true:
3/8 = 3 ÷ 8
Answer:
You can draw a picture like this:
Step-by-step explanation:
If we are working with fractions, then think of it as a circle.
3 circles divided by 8 people
(Draw 3 circles divided into eighths)
Now, on the first circle, write the number one into one of the slices.
Do the same to the second circle.
Now the third.
How many slices have the number 1 in it?
3 slices have the number 1 in it.
And each whole circle has 8 pieces.
3 (slices) divided by 8 (People) = 3/8
Line d pae through point (3, 5) and (10, 1). Line a pae through point (5, 8) and (2, 13). Are line d and line are parallel or perpendicular
lines a and d are neither parallel nor perpendicular.
What is the slope of line?
Given two line-side coordinates, use the slope formula to determine the slope of the line. The slope is defined as the ratio of the change in the y values to the change in the x values using the formula m=(y2-y1)/(x2-x1). x1 and y1 are represented by the first point's coordinates. The second points are located at x2, y2, and their locations. Whichever point you choose to classify as the first and which as the second doesn't matter.
The given points of line d is (3,5) and (10,1)
and line an of line a is (5, 8) and (2, 13).
The slope of line d is m 1 = [tex]\frac{1-5}{10-3}[/tex]
m1 = -4/ 7
The slope of line d is m2 = [tex]\frac{13-8}{2-5}[/tex]
m2 = -5/3
if the slope of two lines is equal that is m1 = m2 , then the lines are parallel and the relation m1*m2=−1, then the lines are perpendicular to each other.
Here both condition fails.
Hence, lines a and d are neither parallel nor perpendicular.
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A cylindrical container with capacity 355cc is to be produced. The bottom and side of the container are to be made of material that costs 0. 02 cents per cm2 , while the top of the container is made of material costing 0. 03 cents per cm2. Find the dimensions that will minimize the cost of the container. Provide a convincing argument that your results give the least expensive cost
The dimension of the cylindrical container that will minimize the cost of the container is a radius of 4.371 and a height of 25.85
since we know that the volume of a cylinder is :
355=πr²h, where r is the radius of the base and h is the height
So, we can say h=355/πr², here we have two circular components with the areas 2A=2πr² , for the cost of 0. 02 cents per cm² and a rectangular component of area A=2πrh , with cost of 0. 03 cents per cm².So the cost function will be :
C=0.02(2πr²)+0.03(2πrh)
C=0.04(πr²)+0.06(πrh), substuting the vale of h
C=0.04(πr²)+0.06(πr(350/πr²))
C=0.04(πr²)+(21/r), differentiating both sides we get .
C'=0
=>0.08(πr)-(21/r²)= 0, simplifying the equation we get
=>r= 3√525/2π =4.371
so for h, it will be: 355/π(3√(525/2π)) = 355/π(3√(83.55)) =350/π( 4.371) =25.85
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Let F be the radial force field F(x, y) = xi + yj. Find the work done by this force along the following two curves, both which go from (0, 0) to (4, 16). (Use the Fundamental Theorem for Line Integrals instead of computing the line integral from the definition, as you did in the previous set. This way shows why the answers to the two parts must be the same - independence of path!) A. If C_1 is the curve: x = t, y = t^2, 0 lessthanorequalto t lessthanorequalto 4, then integral_C_1 F middot dr = B. If C_2 is the curve: x = 4t^2, y = 16t^2, 0 lessthanorequalto t lessthanorequalto 1, then integral_C_2 F middot dr =
To know the answer check the given file.
Question 1
Conor is going to the movie theater. A ticket to a movie costs t dollars, and there
is a 15% amusement tax on each ticket.
a. Conor buys a ticket to see a movie. Write two expressions in terms of t
showing his total cost.
Please help !!!!
The expressions of the total cost are 1.15t and t * (1 + 0.15)
How to determine the expression of the total cost?From the question, we have the following parameters that can be used in our computation:
Cost of a ticket = t dollars
Amusement tax on each ticket = 15%
The above parameters mean that the total cost of a ticket can be calculated using the following equation
The total cost of a ticket = Cost of a ticket * (1 + Amusement tax on each ticket)
Substitute the known values in the above equation, so, we have the following representation
The total cost of a ticket = t * (1 + 15%)
Evaluate the percentage
The total cost of a ticket = t * (1 + 0.15)
So, we have
The total cost of a ticket = t * (1.15)
Evaluate the product
The total cost of a ticket = 1.15t
Hence, the expression is 1.15t
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3
Select all the correct answers.
Which expressions are equal to ¹.2*?
O 12³
0 2³.33
0 26.33
O 125
It seems that there is perhaps some missing info here. Could you double check your question to validate the information being asked? Tysm!
Identify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpoint
Answer: Identify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpoint
Step-by-step explanation: Identify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointvvIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpointIdentify the concluion of the tatement. If AB i a egment, then it ha two endpoint. O The egment ha two endpoint. O If AB i a egment. O
AB i a egment. O Then, the egment ha two endpoint
Two occupations predicted to greatly increase in number of jobs are pharmacy technicians and network systems and data communication analysts. The number of pharmacy technician jobs predicted for
2003 through 2014 can be approximated by 7.3x-y=-256. The number of network and data analyst jobs for the same years can be approximated by 12.1x-y=-234. For both equations, x is the
number of years since 2003 and y is the number of jobs in thousands.
The year in which the number of both jobs pharmacy technicians and network systems and data communication analysts is equal is 2008.
Explain the term two variable linear equation?The linear equation in 2 variables is any equation that can be written as ax + by + c = 0, in which a, b, and c are all real values while a and b are not equal to zero.Considering the set of equations
7.3x - y = -256
12.1x - y = -234
where x represents the period of time since 2003.
y represents the quantity of jobs in thousands.
We have the answer after solving the system:
(x, y) ==> (4.5, 292)
Find the year where the total number of both jobs is equal.
At the solution point, the graphs of the two lines will collide.
The year in which the number from both jobs is equal will be 4.5 years after 2003, since x is the number of years after 2003.
So, here we are:
Year where the sum of the two jobs is equal:
2003 + 4.5 = 2007.5
= 2008 year
As a result, there will be an equal number of both jobs in 2008.
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john computes the sum of the elements of each of the 15 two-element subsets of $\{1,2,3,4,5,6\}$. what is the sum of these 15 sums?
Sum of the 15 two elements subset of $\{1,2,3,4,5,6} = ( N-1) (N)(N+1)/2
Three elements....two at time (1,2) (1,3) (2,3)....sum = 12
Four elements .... two at a time (1,2) (1,3) (1,4) (2,3) (2,4) (3,4) .....sum = 30
Five elements....two at a time (1,2) (1,3) (1,4) (1,5) (2,3) (2,4) (2,5) (3,4) (3,5) (4,5)
Note that for N elements taken 2 at a time....the pattern of sums seems to be
= (N-1)(N)(N+1) / 2
For taking 6 elements taking 2 at a time the sum should be
=(5)(6)(7) /2
=210 /2
=105
Therefore, total sum of those 15 sums of the elements of each of the 15 two-element subsets of $\{1,2,3,4,5,6\}$ = 105
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