The solution of the equation 2x+4=3x-62x+4=3x−6 is x =
jacob, a researcher, asks the participants of his study to transfer data from 12 spreadsheets to 12 different documents. he observes that the participants gain more efficiency in transferring the data with each new spreadsheet. this scenario exemplifies a(n)
The scenario exemplifies a(n) that effect is practice effect
In experiments utilising within-subjects designs, the practise effect is especially problematic since participants' performance on the study variable may increase just by engaging in the activity again, independent of any study manipulations the researcher may have imposed.
When a test is retaken, the practise effects have an impact on the results. A practise effect, for instance, can result from taking numerous practise SAT exams; practise can raise your overall score.
Counter balancing is one strategy for limiting the effects of practise. It is possible that the trials will use randomization or will use every feasible order for administering treatments to subjects.
According to the question,
Jacob observes that the participants gain more efficiency in transferring the data with each new spreadsheet. this scenario exemplifies a(n) that this is Practice effect
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question 4 you are working with the following selection of a spreadsheet: a b 1 customer address 2 sally stewart 9912 school st. north wales, pa 19454 3 lorenzo price 8621 glendale dr. burlington, ma 01803 4 stella moss 372 w. addison street brandon, fl 33510 5 paul casey 9069 e. brickyard road chattanooga, tn 37421 in order to extract the five-digit postal code from north wales, pa, what is the correct function?
For the given data analysis , The correct function is : RIGHT(B3,5), which is the correct syntax.
Here it is related to data cleaning which is the process of removing or fixing data that are incorrect or formatted incorrectly, corrupted, duplicate, or even incomplete data within a dataset that exists. When we mix multiple data sources, it depicts that there can be opportunities for the data to be mislabeled or duplicated, since we are guiven that the customer names and addresses, so the correct syntax will be =RIGHT(B3,5), where the RIGHT Function that returns set number of characters of a text string from the right side
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balls labeled 1 through 9 are placed in a knapsack. two balls are selected from the knapsack, one at a time without replacement. the first ball we draw is even. what is the probability that the second ball is greater than the first ball?
The probability that the second ball is greater than the first ball is 5/8
Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.
The ratio of the number of outcomes in an exhaustive set of equally likely outcomes that produce a given event to the total number of possible outcomes.
As to even odd
first ball can be anything. Second would have to be the first is not thus 5/9.
As second smaller than first
if first is 9, probability is 8/8, 100%, if 7 probability s 6/8 so in general take first ball, value k,
then the probability is sum (k - 1) / (n = 10 - 1) for k=1,2,…,9 so that’s all in 45/8 times 1/9 so 45/72 or 5/8.
Even a clear ball has Color so unless you have an invisible ball in your collection, both balls will be some amount of color or color.
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I NEED HELP!!!!!!!!!!!!
Step-by-step explanation:
the surface area is the combination of
the base (square) area
the 4 side (triangle) areas.
the base area is : 10×10 = 100 in²
the area of a triangle is
baseline × height / 2
we know the baseline of each of the 4 triangles (10 in) and we know the height (14 in).
one triangle area is
10×14/2 = 70 in²
we have 4 of these triangles (each side of the pyramid) :
4×70 = 280 in²
the total surface area of the pyramid is
100 + 280 = 380 in²
what can you say about the geometric multiplicity of the eigenvalues of a matrix of the form a = ⎡ ⎣ 010 001 abc ⎤ ⎦ , where a, b, c are arbitrary constants?
Eigenvalues are a unique collection of scalar values connected to the set of linear equations that are most often found in the matrix equation.
What is meant by eigen value?Eigenvalues are the unique set of scalar values connected to the set of linear equations most likely found in the matrix equations. Also known as characteristic roots, the eigenvectors are. After applying linear transformations, the vector is non-zero and can only be altered by its scalar factor.
The term "eigenvalue equation" refers to an equation in which the operator multiplies the function by a constant when applied to a function. An eigenvalue is the resultant numerical value, and an eigenfunction is the function itself.
Given:
The given value is
[tex]$$A=\left[\begin{array}{lll}0 & 1 & 0 \\0 & 0 & 1 \\a & b & c\end{array}\right]$$[/tex]
where a, b, c are arbitrary constants.
If [tex]$\lambda$[/tex] is an eigen value of A Then,
[tex]$& E_\lambda={ker}(A-\lambda I) \\[/tex]
Now,
Last two rows are linearly independent.
So, we have
[tex]${dim} E_\lambda=1$[/tex]
Therefore,
[tex]${gemu}(\lambda)=1$$[/tex]
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What is 100k in Celsius ?
100k in celsius is -173.15 degrees.
The Celsius scale, commonly known as centigrade, uses a base of 0° for water's freezing point and 100° for water's boiling point. Because of the 100-degree gap between the designated points, the Celsius scale, which was developed in 1742 by the Swedish astronomer Anders Celsius, is occasionally referred to as the centigrade scale.
The Celsius scale is in general use wherever the metric system of units has been adopted, and it is used in scientific work everywhere.
To convert Celsius to kelvin, the formula is:
T(K)=°C+273.15
∴100=°C+273.15
°C=100-273.15 = - 173.15
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Andre has a summer job selling magazine subscriptions. He earns $25 per week plus $3 for every subscription he sells. Andre hopes to make at least enough money this week to buy a new pair of soccer cleats.
Write an inequality to describe the number of subscriptions Andre must sell to reach his goal.
The inequality to describe the number of subscriptions Andre must sell to reach his goal is 3s + 25 ≥ C.
What are inequalities and their types?Inequality is a relation that compares two numbers or other mathematical expressions in an unequal way.
The symbol a < b indicates that a is smaller than b.
When a > b is used, it indicates that a is bigger than b.
a is less than or equal to b when a notation like a ≤ b.
a is bigger or equal value of an is indicated by the notation a ≥ b.
Assuming the cost of soccer cleats to be 'C' and the number of subscriptions to be 's'.
∴ The inequality that represents this situation is 3s + 25 ≥ C to real his goal.
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using an average ground speed of 120 knots and taking off on runway 14, what minimum rate of climb must be maintained to meet the required climb rate (in feet per nm) to 4,800 feet as specified on the instrument departure procedures? a. 435 feet per minute. b. 500 feet per minute. c. 1,000 feet per minute.
According to the given speed, the minimum rate of climb must be maintained to meet the required climb rate to 4,800 feet as specified on the instrument departure procedures is option (d) 870 feet per minute.
Speed:
In math speed refers the rate of change of position of an object in any direction.
Given,
Here we have using an average ground speed of 120 knots and taking off on runway 14.
Now, we need to find in what minimum rate of climb must be maintained to meet the required climb rate (in feet per nm) to 4,800 feet as specified on the instrument departure procedures.
While we looking into the given question, we have identified that,
Speed = 120
Distance = 4800
Then the minimum rate of climb must be maintained to meet the required climb rate is calculated as,
Here we also note in the bottom left corner of the overhead view of the departure requires 435 ft/nm climb gradient to 4800' for obstacle clearance.
Therefore, the minimum rate is 870 feet per minute.
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Which of the following quadrilaterals has four right angles and 4 congruent sides? A. parallelogram B. rectangle C. rhombus D. square
Answer:Square
Step-by-step explanation:
A square is a quadrilateral with four right angles and four congruent sides. All squares are rectangles and rhombuses.
Answer:
D. square
Step-by-step explanation:
As an explanation, I have attached a picture of the 4 quadrilaterals and their internal angles and sides.
⭐if this response helped you, please mark it the "brainliest"!⭐
What is the value of x?
The value of x for the given expressions is 3.
What is equilateral triangle?Triangles are classified into three different types based on their sides. An isosceles triangle, a scalene triangle, and an equilateral triangle. Equilateral triangles are different from isosceles and scalene triangles.
An equilateral triangle is a triangle with all three equal sides and equal angles. An equilateral triangle is also called an equilateral triangle because each angle has a value of 60 degrees. Equilateral triangles are considered regular polygons or equilateral triangles because they have equal angles and equal sides.
In ∆ ABC
∠A= ∠B=∠C
Triangle is equilateral triangle.
All the triangle side will be equal
6x-3=3x+6=5x
=6x-3 =3x+6
=3x=g
X=3
Thus, X = 3
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Erica recorded the number of sales she made during each of the first 4 months when
she began her new career. Erica plotted the data on a coordinate grid, and she noted
that the data correlate to an exponential equation, as shown.
What is the domain of the function shown in the graph?
The domain for the given graph is obtained as {1, 2, 3, 4}.
What is a function?A function y = f(x) is a one to one relationship between two sets X and Y where the set X is called the domain and Y the range of function f(x) ans x ∈ X and y ∈ Y.
From the graph of the given exponential function,
The set of ordered pairs can be written as follows,
{(1, 10), (2, 20), (3, 40), (4, 80)}
Since the domain is the set of first elements for a given pair of ordered set.
The domain is given as {1, 2, 3, 4}.
Hence, the domain obtained from the given graph is {1, 2, 3, 4}.
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The graph missing in the question is attached here.
which graph shows a polynomial function with a positive leading coefficient?
The graph shows a polynomial function with a positive leading coefficient B.
What is meant by polynomial function with a positive leading coefficient?The function will reach its maximum value of + in the case of a positive leading coefficient and its minimum value of - in the case of a negative leading coefficient. This indicates that even degree polynomials with positive leading coefficients have a range of [ymin, ∞), where ymin stands for the global minimum that the function reaches.
When a variable in an equation like the quadratic equation, cubic equation, etc. has only non-negative integer powers or only positive integer exponents, the function is said to be polynomial.
Leading coefficients are the values listed before the variable with the biggest exponent. They can be positive, negative, real, imaginary, whole, fractional, or decimal, much like conventional coefficients, and they can also be positive, negative, real, or imaginary.
Therefore, the correct answer is option B.
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we want to conduct a hypothesis testing about comparing of the 95th percentile of the income of country a and that of country b. we take a sample from each country. can the permutation test be used in this problem?
Yes, the permutation test is used in this problem to conduct a hypothesis testing about comparing the 95th percentile of the income of country a and that of country b.
Yes, the permutation test can be used in this problem. The permutation test is a nonparametric test that can be used to compare two or more groups to determine if there is a statistically significant difference between them. In this case, we can use the permutation test to compare the 95th percentile of the incomes of the two countries. The permutation test would involve randomly permuting the data for each country, then calculating the 95th percentile for each permutation. The difference in the 95th percentile between the two countries in the original data can then be compared to the differences in the 95th percentile of the permuted data to see if the difference is statistically significant.
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HELP MEEEEEEEEEEEEEEEE PLEASEEEEEEEEEEEE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
t ≈ 11.7
Step-by-step explanation:
r
A = P (1 + -------)^(n)(t)
n
A = 5000
P = 2500
r = 0.06
n = 2
t = ?
0.06
5000 = 2500 (1 + ----------)^(2)(t)
2
0.06
5000 = 2500 (1 + ----------)^(2)(t)
÷2500 ÷2500 2
0.06
2 = (1 + ----------)^(2)(t)
2
log 2
------------------------ = 2t
0.06
log (1 + ----------)
2
log 2
(1/2) ------------------ = 2t (1/2)
0.06
log (1 + ----------)
2
11.72488612 = t
11.7 ≈ t
I hope this helps!
Solve for x: 3/4(x-13)=-2(9+x)
Answer:
x = -3
Step-by-step explanation:
Welcome to Brainly! :]
3/4(x-13)=-2(9+x)
0.75x - 9.75 = -18 - 2x
2.75x = -8.25
x = -3
:]
9,15,25, Find the 10th term
On solving thr provided question, by help of arithmetic progression, we got to know that a10 = 207
what is arithmetic progression?There are two approaches to define arithmetic progressions (AP):
The difference between any two successive terms in an arithmetic sequence must always be equal, and it is sometimes referred to as a series in which all terms except the first are created by adding a predetermined number to the preceding term.
9,15,25..............
15-9 = 6
25-15 = 10
a4 - 25 = 14 => a4 = 39
a5-39 = 18 => a5 = 57
a6-57 = 22 => a6 79
...
...
...
...
...
a10 - 169 = 38 => a10 = 207
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water runs into a conical tank at the rate of 9 ft 3/min. the tank stands point down and has a height of 10 ft and a base radius of 5 ft. how fast is the water level rising when the water is 6 ft deep?
The water level rise when it is 6 feet deep is 0.318 feet/min when a conical tank is filled with water at a pace of 9 feet per minute.
Given that,
A conical tank is filled with water at a pace of 9 feet per minute. The tank is 10 feet tall and has a base radius of 5 feet. It stands pointed down.
We have to find how quickly does the water level rise when it is 6 feet deep.
We know that,
dv/dt= 9 feet³/min
x=5 feet
y=10 feet
And we have x/y=1/2 ----->equation(1)
We know the formula
V=1/3πx²y
Differentiating on both sides
dv/dt=9
1/3πy(2x) dx/dt+π/3(x²)dy/dt
=π/3[2xy dx/dt+x² dy/dt]
From equation(1)
x/y=1/2 or y=2x
dy/dt= 2dx/dt
Now,
9=π/3[xy dy/dt+x² dy/dt]
9= π/3 dy/dt[xy+x²]
dy/dt=9×3/π×(18+9)
dy/dt=27/π×27
dy/dt= 1/π
dy/dt=0.318 feet/min
Therefore, The water level rise when it is 6 feet deep is 0.318 feet/min when a conical tank is filled with water at a pace of 9 feet per minute.
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Evaluate 9.1p + 8.9r when p = 6 and r =7.
The solution to the expression 9.1p + 8.9r is 116.9 when p = 6 and r = 7
How to evaluate the mathematical expression?From the question, the mathematical expression is given as
9.1p + 8.9r
The values of the variables are given as
p = 6 and r = 7
Substitute p = 6 and r = 7 in the given expression 9.1p + 8.9r
So, we have the following representation
9.1p + 8.9r = 9.1 * 6 + 8.9 * 7
Evaluate the products in the above equation
9.1p + 8.9r = 54.6 + 62.3
Evaluate the sum in the above equation
9.1p + 8.9r = 116.9
Hence, the value is 116.9
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How do you use demoivre's theorem to simplify (1+i)^12?
By using demovire's theorem to determine the complex numbers to simplify (1+i)^12 we get [tex]z^{12}=-2^6=-64[/tex]
first, we have to find the argument. As the complex number, z=1+i will be in the 4th quadrant
we proceed according to conditions in demovire's theorem
[tex]r=\sqrt{(1)^2+(1)^2}\\ \\r=\sqrt{2}[/tex]
so from this our angle becomes
[tex]\alpha =2\pi -tan^{-1}=- \frac{\pi }{4}[/tex]
so putting r and alpha in the formula of demovier's of complex numbers
[tex]z^{n}=r^{n}(cos\alpha +isin\alpha )\\\\z^{12}=(\sqrt{2} )^{\112} }(cos\((\frac{-\pi }{4}) +isin(\frac{-\pi }{4}) )\\\\z^{12}=2^6(-1-0)\\\\z^{12}=-2^6=-64[/tex]
we get z to the power 12 equals to negative times sixty-four.
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A company manufactures model rockets that require igniters to launch. Once an igniter is used to launch a rocket, the igniter cannot be reused. Sometimes an igniter fails to operate correctly, and the rocket does not launch. The company estimates that the overall failure rate, defined as the percent of all igniters that fail to operate correctly, is 15 percent. A company engineer develops a new igniter, called the super igniter, with the intent of lowering the failure rate. test the performance of the super igniters, the engineer uses the following process. Step 1: One super igniter is selected at random and used in a rocket. Step 2: If the rocket launches, another super igniter is selected at random and used in a rocket. Step 2 is repeated until the process stops. The process stops when a super igniter fails to operate correctly or 32 super igniters have successfully launched rockets, whichever comes first. Assume that super igniter failures are independent a. If the failure rate of the super igniters is 15 percent, what is the probability that the first 30 super igniters selected using the testing process successfully launch rockets? b. Given that the first 30 super igniters successfully launch rockets, what is the probability that the first failure occurs on the thirty-first or the thirty-second super igniter tested if the failure rate of the super igniters is 15 percent? C. Given that the first 30 super igniters successfully launch rockets, is it reasonable to believe that the failure rate of the super igniters is less than 15 percent? Explain.
0.0076 is the probability that the first 30 igniters tested do not fail .
What is probability in math?
The area of mathematics known as probability explores potential outcomes of events, along with the likelihoods and distributions of those occurrences.
a)if the failure rate for the super igniters is 15% then the probability that each igniter fails is 0.15,and the probability that it does not fail is 0.85.Therefore the probability that the first 30 igniters tested do not fail is (0.85)30= 0.0076.
b)given that there are no failures in the first 30 tries,the probabilities occurs on 31st try is 0.15 and the probability that it does not occur on 31st but occurs on 32nd try is (0.85)(0.15)=0.1275.therefore the probability of one or the other is 0.15+0.1275=0.2775.
c)the result of the probability calculation in part(a) provides reason to believ the failure rate of the super igniters is less than 15%.The calculated proability of 0.0076 shows that there is less than a 1% chance that 30 or more igniters in a row would not fail if the failured rate was 15%.This probability is smaller than conventional significance levels such as alpha=0.05 and 0.01 and thus is small enough to make it reasonable to believe that the failure rate of the super igniters is less than 15%.
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How do you determine whether the sequence a_n=(2^n+3^n) / (2^n−3^n) converges, if so how do you find the limit?
You determine the limit by [tex]\lim_{n \to \infty} a_n = -1[/tex].
A limit in mathematics is a point at which a function approaches the output for the specified input values. Calculus and mathematical analysis depend on limits, which are also used to determine integrals, derivatives, and continuity. The concept of limit, which is founded on the idea of closeness, is largely used to give values to some functions at points when none are defined in a way that is consistent with values close by.
Divide the denominator and numerator by 3n as shown.
[tex]\lim_{n \to \infty} a_n = \lim_{n \to \infty} \frac{2^n+3^n}{2^n-3^n\\}[/tex]
[tex]= \lim_{n \to \infty} \frac{(\frac{2}{3})^n+1 }{(\frac{2}{3})^n-1 } \\=\frac{0+1}{0-1} \\=-1[/tex]
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Every fall, Maya has to rake the leaves in her backyard. She wants to know the area of her backyard knows what space that she has to rake Three of the coordinates on the grid that can be used to represent her backyard are (8.5, 4), (8.5, 8) and (-2, 8). 1. Plot the fourth coordinate of the rectangle. What is the ordered pair?
Answer:
(2,4)
Step-by-step explanation:
What transformation has changed the parent function f(x) = (.5)x to its new appearance shown in the graph below? exponential graph passing through point 1, 2 and point 2, 1. (1 point) f(x) − 2 f(x + 2) f(x − 2) f(x) + 1
The transformation that has changed the parent function f(x) = (0.5)^x to the exponential graph passing through points (1,2) and (2,1) is given as follows:
f(x - 2).
How to define the transformation?The parent function for this problem is given as follows:
f(x) = (0.5)^x.
Hence the points on the graph of the parent function are given as follows:
(-1, 2), as when x = -1, f(x) = (0.5)^(-1) = (1/0.5)^1 = 2.(0, 1), as when x = 0, f(x) = (0.5)^0 = 1.(1, 0.5), as when x = 1, f(x) = (0.5)^1 = 0.5.(2, 0.25), as when x = 2, f(x) = (0.5)² = 0.25.The points on the transformed function are given as follows:
(1,2) and (2,1).
Meaning that the value assumed at x = -1 is now assumed at x = 1, while the value assumed at x = 0 is not assumed at x = 2, meaning that the function was shifted right two units, and the transformation is defined as follows:
f(x - 2).
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prove Triangle ACE is an isosceles triangle by completing this proof.
Hint: there are 3 parts to this proof!
An isosceles triangle is a type of triangle which has two of its sides to be equal, viz-a-viz two of its internal angles are equal. The required proof in the given question are stated below:
A triangle is a trigon with just three straight sides, thus three internal angles. Thus, the sum of its internal angles equals [tex]180^{o}[/tex]. Some common examples are. equilateral, isosceles, right angled, scalene, etc.
An isosceles triangle is one which has two of its sides equal, so that the measure of two of its internal angles are also equal.
Therefore, the expected proof in the question are:
STATEMENT REASON
1. AB = BC = CD = DE = EA Similar sides of a regular pentagon
2. AB = DE Congruent of sides of similar triangle
3. BC = CD Congruent of sides of similar triangle
4. <ABC = <EDC Congruent angles of similar triangle
5. AC = CE Congruent sides of an isosceles triangle
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2-[(2+10(-1)divided by 2)+1]
What is the value on the expression?
The value of the numerical expression 2 - [(2 + 10 × -1) / 2 + 1] will be 5.
What is the value of the expression?When the relevant components and basic processes of a numerical method are given values, the expression's result is the result of the computation it depicts.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
The numerical expression is given below.
⇒ 2 - [(2 + 10 × -1) / 2 + 1]
Simplify the expression, then we have
⇒ 2 - [(2 + 10 × -1) / 2 + 1]
⇒ 2 - [(2 - 10) / 2 + 1]
⇒ 2 - [(-8 / 2) + 1]
⇒ 2 - (-4 + 1)
⇒ 2 - (-3)
⇒ 2 + 3
⇒ 5
The value of the numerical expression 2 - [(2 + 10 × -1) / 2 + 1] will be 5.
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What is the set of numbers to which √10.24 belong?
√10.24 belongs to the set of rational numbers.
Here we are given the number √10.24.
Now first we see that √10.24
= 3.2
Now as we can see that there is a number other than 0 after the decimal point here. Hence the above number cannot be classified as a natural number, a whole number, or an integer.
However, on converting 3.2 into the fractional form, we see that
3.2 = 32/10
reducing this to smallest form we get
16/5
Here we could easily represent 3.2 in the form of p/q where q is not equal to 0.
Hence p/q is a rational number.
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Which of the following is a solution to both y= 4x - 8 and y = 8x - 4? A. (-12, -1) B. (3, 4) C. (1, 4) D. (-1, -12)
(-12, -1) is a solution to both y= 4x - 8 and y = 8x - 4.
What is meant by solution of equation?Any value of the variable that makes the Left Hand Side (LHS) and the Right Hand Side (RHS) of the equation equal is considered a solution to the problem. Finding the solution or solutions to an equation is known as solving it.
What are three types of solution?Unique, infinitely many solutions and no solutions are three types of solution.
If we put x=-12 and y=-1 in both of the given equation we will get L.H.S=R.HS . So (-12, -1) is the required solution.
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this data is normally distributed. what percent of the data is in the shaded region 68% 50% 95% 99.7%
As per the empirical rule, the percent of data in the shaded region is 68%.
In statistics, the empirical rule states that When you use a standard normal distribution also known as Gaussian Distribution we have to consider the following
=> Around 68% of values fall within one standard deviation of the mean.
=> Around 95% of the values fall within two standard deviations from the mean.
=> Other all of the values are about 99.7% that fall within three standard deviations from the mean.
Therefore, this facts are the 68 95 99.7 rule. And it is also called the Empirical Rule because the rule originally came from observations.
Here we have given the the data is normally distributed. And we need to find the percent of data is in the shaded region.
While we looking into the following diagram and according to empirical rule,68% of the data falls within one standard deviation of the mean.
Because, the center part is the shaded region,
So, it can be calculated as,
=> 34 + 34 = 68%
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Factor the polynomial
below completely:
10m5n² + 25m³n³
(Show work please)
Answer:
[tex]5mn^{2} (2+ 5m^{2} n)[/tex]
Step-by-step explanation:
I assumed the polynomial is [tex]10mn^{2} +25m^{3}n^{2}[/tex]
FIRST: Highlight the common factors{ 5 , m and[tex]n^{2}[/tex])
[tex]5mn^{2} (2+ 5m^{2} n)[/tex]