Answer:
To find the surface area of a regular hexagonal pyramid, we need to find the area of the six triangular faces and the area of the hexagonal base, and then add them together.
The area of each triangular face is given by the formula:
(1/2) x base x height
In this case, the base of each triangle is the side length of the hexagon (8), and the height is the slant height of the pyramid (16). Therefore, the area of each triangular face is:
(1/2) x 8 x 16 = 64
The hexagonal base can be divided into six equilateral triangles, each with side length 8. The area of each equilateral triangle is:
(1/4) x sqrt(3) x side length^2
Plugging in the values, we get:
(1/4) x sqrt(3) x 8^2 = 16sqrt(3)
To find the total surface area, we add the area of the six triangular faces and the area of the hexagonal base:
6 x 64 + 16sqrt(3) = 384 + 16sqrt(3)
Rounding to the nearest tenth, the surface area of the regular hexagonal pyramid is:
398.6 square units (rounded to one decimal place)
Find an expression, in terms of x, for the perimeter of this L shape.
The perimeter of the L shape is: AB + BC + CD + AC = x + x + x √2 + x = 2x + x √2
To find the perimeter of the L shape, we need to add up the lengths of all the sides.
Starting from the top left corner, we can label the four vertices of the L shape as A, B, C, and D, as shown in the diagram below.
The length of side AB is simply x, and the length of side BC is also x.
To find the length of side AC, we can use the Pythagorean theorem. Since triangle ABC is a right triangle, we have:
[tex]AC^2 = AB^2 + BC^2[/tex]
[tex]AC^2 = x^2 + x^2\\AC^2 = 2x^2\\\\AC = sqrt(2x^2) = x sqrt(2)\\\\[/tex]
Finally, to find the length of side CD, we can use the fact that it is parallel to AB and has the same length as BC, which is x.
Therefore, the perimeter of the L shape is:
AB + BC + CD + AC = x + x + x √2 + x = 2x + x √2
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What is an expression in terms of x for the greatest perimeter for a shape made of L regular hexagons?
Solve the system below by substitution.
y = 2x + 4
y = 3x - 8
Answer:
(12, 28 )
Step-by-step explanation:
y = 2x + 4 → (1)
y = 3x - 8 → (2)
substitute y = 3x - 8 into (1)
3x - 8 = 2x + 4 ( subtract 2x from both sides )
x - 8 = 4 ( add 8 to both sides )
x = 12
substitute x = 12 into either of the 2 equations
substituting into (1)
y = 2(12) + 4 = 24 + 4 = 28
solution is (12, 28 )
need help ASAP, find the vertices of:
(x-2)^2/16-(y-1)^2/4=1
show work pls!!
Answer:
Step-by-step explanation:
(x - 2)²/16 - (y - 1)²/4 = 1
(x - 2)² - 4(y - 1)² = 16
x² + 4 - 4x - 4(y² + 1 - 2y) = 16
x² + 4 - 4x - 4y² - 4 + 8y = 16
x² - 4x + 8y - 4y² = 16
x² - 4x = 16 , -4y² + 8y = 16
x(x - 4) = 16 , 4y(-y + 2) = 16
x = 16, x = 20, y = 4, y = -14
neckties and bacteria: a group of researchers investigated the contamination of medical personnel clothing at a new york hospital since there is a potential for patient exposure to potentially dangerous bacteria. they sampled neckties worn by physicians, physician assistants, and medical students at a teaching hospital in new york. nearly half (47.6%) of the neckties tested harbored microorganisms that can cause illness. by comparison, only one of the 10 ties worn by security guards tested positive for a disease-carrying microorganism. the researchers want to determine if the difference is statistically significant. which of the following is an appropriate statement of the null hypothesis?
the findings of the study highlight the importance of maintaining a sterile environment in medical facilities and the need to take measures to prevent the spread of bacteria and other microorganisms.
It is important for medical personnel to maintain a sterile environment to prevent the spread of bacteria and other microorganisms. The findings of the research suggest that neckties worn by physicians, physician assistants, and medical students may harbor microorganisms that can cause illness.
The fact that 47.6% of the neckties tested positive for microorganisms is concerning, as it suggests that there is a significant risk of contamination. However, it is important to note that the study only sampled neckties at one hospital, so it is unclear if the findings can be generalized to other hospitals or medical facilities.
It is also worth noting that only one of the 10 ties worn by security guards tested positive for microorganisms. This suggests that there may be differences in the level of contamination between different types of clothing or between different groups of people.
Overall, the findings of the study highlight the importance of maintaining a sterile environment in medical facilities and the need to take measures to prevent the spread of bacteria and other microorganisms. This may include implementing dress codes that require medical personnel to avoid wearing neckties or other clothing items that cancan harbor bacteria, as well as ensuring that proper sterilization procedures are followed.
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What is the difference in minutes between 55 minutes and 1 3/4 hours
The difference in minutes between 55 minutes and 1 3/4 hours is 50 minutes.
We have,
To convert 1 3/4 hours to minutes, we can multiply it by 60 (since there are 60 minutes in an hour):
So,
1 3/4 hours
= (1 x 60) + (3/4 x 60)
= 60 + 45
= 105 minutes
Now we can find the difference between 105 minutes and 55 minutes:
= 105 minutes - 55 minutes
= 50 minutes
Therefore,
The difference in minutes between 55 minutes and 1 3/4 hours is 50 minutes.
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Find f(g(x)) if
f(x) = x² + 2x
g(x) = x - 9
Answer: f(g(x)) = (x - 9)² + 2(x - 9)
= x² - 18x + 81 + 2x - 18
= x² - 16x + 81
Step-by-step explanation:
What is the ratio of the area of the triangle to the area of the rectangle?
Answer:
The area of the triangle is one-half the area of the rectangle. So the correct answer is C.
determine the time necessary for p dollars to doubl when it is invested at ineterest rate r compounded annually, monthly, daily, and continously, (round your answers to two decimal places.)
The time necessary for p dollars to double when it is invested at interest rate r compounded annually is given by the formula:
t = (ln 2) / (r ln (1 + r))
When compounded monthly, the formula becomes:
t = (ln 2) / (12 r ln (1 + r/12))
When compounded daily, the formula becomes:
t = (ln 2) / (365 r ln (1 + r/365))
When compounded continuously, the formula becomes:
t = ln 2 / (r)
Note that ln is the natural logarithm function.
To use these formulas, you need to know the value of the interest rate r. For example, if r is 5%, then:
When compounded annually, t = (ln 2) / (0.05 ln 1.05) = 13.86 years
When compounded monthly, t = (ln 2) / (12 x 0.05 ln 1.0041) = 14.21 years
When compounded daily, t = (ln 2) / (365 x 0.05 ln 1.000137) = 14.27 years
When compounded continuously, t = ln 2 / (0.05) = 13.86 years
Therefore, the time necessary for p dollars to double depends on the interest rate and the frequency of compounding. Generally, the more frequently the interest is compounded, the shorter the time necessary for p dollars to double.
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If rectangle STUV is translated using the rule (x, y) → (x − 2, y − 4) and then rotated 90° counterclockwise, what is the location of S″?
The location of S" after translating and rotating the rectangle is (-3, -4).
To find the location of S" after translating and rotating the rectangle, we need to follow the two steps in order:
Translation: Apply the rule (x, y) → (x − 2, y − 4) to each vertex of the rectangle to get its new location. The new vertices are:
S'(-4, -3), T'(-4, -1), U'(-2, -1), V'(-2, -3)
Rotation: Rotate the translated rectangle 90° counterclockwise. This means that each vertex will swap its x and y coordinates and the new x-coordinate will be negated. The new vertices after rotation are:
S"(-3, -4), T"(-1, -4), U"( -1, -2), V"(-3, -2)
Therefore, the location of S" is (-3, -4).
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which of the following represent the sum of the polynomials below
The sum of the polynomial is solved to be
A. 5x^5 + 7x^3 + 7x^2 + 25x
How to add the polynomialsTo find the sum of the given polynomials, we simply add the like terms. Like terms in this case are terms with the same degree of x.
The given polynomials are:
(9x^5 + 7x^3 + 21x) and
(-4x^5 + 7x^2 + 4x)
Adding the like terms:
9x^5 + (-4x^5) = 5x^5
7x^3 + 0 = 7x^3
0 + 7x^2 = 7x^2
21x + 4x = 25x
Putting it all together, we get:
(9x^5 + 7x^3 + 21x) + (-4x^5 + 7x^2 + 4x) = 5x^5 + 7x^3 + 7x^2 + 25x
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The graphs below have the same shape. What is the equation of the blue
graph?
g(x)=
f(x)=x²
g(x) = ?
Click here for long description
O A. gx)=(x+2)²-1
B. g(x)=(x-2)²+1
C. g(x) = (x + 2)² +1
D. g(x)=(x-2)²-1
The equation of the blue graph include the following: B. g(x) = (x - 2)² + 1.
What is a translation?In Mathematics and Geometry, the translation of a graph to the right simply means adding a digit to the value on the x-coordinate of the pre-image.
In Mathematics and Geometry, a horizontal translation to the right is modeled by this mathematical equation g(x) = f(x - N) while a vertical translation to the positive y-direction (upward) is modeled by this mathematical equation g(x) = f(x) + N.
Where:
N represents an integer.g(x) and f(x) represent functions.In order to write an expression that models g(x), we would have to apply a vertical translation to f(x) by 1 units up and a horizontal translation by 2 units right;
f(x)=x²
g(x) = (x - 2)² + 1.
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Missing information:
The question is incomplete and the complete question is shown in the attached picture.
the estimated resale value (in dollars) of a company car after years is given by 23,351 0.783 . what is the rate of depreciation (in dollars per year) after 2 years? round to the nearest cent. the car is depreciating at $ per year. note: the rate of depreciation is |r'(t)|. your answer should be positive.
To find the rate of depreciation after 2 years, we need to find the derivative of this function at t = 2.
V(t) = 23,351(0.783)^t
V'(t) = 23,351(0.783)^t * ln(0.783) [Using the chain rule]
V'(2) = 23,351(0.783)^2 * ln(0.783) ≈ -2,346.29
Since we are interested in the absolute value of the rate of depreciation, we can ignore the negative sign. Therefore, the car is depreciating at $2,346.29 per year (rounded to the nearest cent).
Note that this is the instantaneous rate of depreciation at t = 2. The average rate of depreciation over the first two years would be the difference in resale value divided by the number of years, which would be:
[(23,351(0.783)^2) - 23,351] / 2 ≈ $2,336.67 per year
Hi! To find the rate of depreciation after 2 years, we need to first determine the resale value of the car after 2 years and then find the difference in value per year. Here's a step-by-step explanation:
1. Plug in the given years (t=2) into the formula for the estimated resale value: V(t) = 23,351(0.783^t)
2. Calculate the resale value after 2 years: V(2) = 23,351(0.783^2) ≈ 14,342.76 (rounded to the nearest cent)
3. Find the depreciation value by subtracting the resale value from the initial value: Depreciation = Initial Value - Resale Value = 23,351 - 14,342.76 ≈ 9,008.24
4. Calculate the rate of depreciation per year: Rate of Depreciation = Depreciation / Years = 9,008.24 / 2 ≈ 4,504.12
The car is depreciating at approximately $4,504.12 per year after 2 years, rounded to the nearest cent.
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An airline knows from experience that the distribution of the number of suitcases that get lost each week on a certain route is approximately normal with L = 16.9 and 3.3. What is the probability that in a given week the airline will lose less than 20 suitcases?
The probability that in a given week the airline will lose less than 20 suitcases is approximately 0.8186 or 81.86%.
We are given that the distribution of the number of suitcases that get lost each week on a certain route is approximately normal with a mean of [tex]$\mu = 16.9$[/tex] and standard deviation of [tex]$\sigma = 3.3$[/tex]. We need to find the probability that in a given week the airline will lose less than 20 suitcases.
Let X be the number of suitcases lost in a week. Then we need to find P(X < 20).
Using the Z-score formula, we can standardize the variable X as:
[tex]Z=\frac{X-\mu}{\sigma}[/tex]
Substituting the given values, we get:
[tex]Z=\frac{20-16.9}{3.3}=0.91[/tex]
Now, we need to find the probability that Z is less than 0.91. We can use a standard normal distribution table or calculator to find this probability, which is approximately 0.8186.
Therefore, the probability that in a given week the airline will lose less than 20 suitcases is approximately 0.8186 or 81.86%.
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!!will give brainliest!!!
Find WZ to the nearest tenth.
Assume that segments that appear
to be tangent are tangent.
The measure of secant WZ = 5 units
We know that the Secant-Tangent theorem states that, 'when a secant and tangent of a circle intersect at the same external point, then the product of the measure of the secant segment and its external part equals the square of the measure of the tangent segment.'
Here, VW is a tanget to a circle at point V and ZW is a secant of a circle.
From Secant-Tangent theorem,
ZY × YW = VW²
(x + 3) × (x) = (x + 1)²
We solve this equation for x.
x² + 3x = x² + 2x + 1
3x - 2x = 1
x = 1
So, the length of WY = 1 unit
So, the length of ZY would be,
x + 3
= 1 + 3
= 4
and the length of WZ = WY + YZ
= 1 + 4
= 5 units
This is the required length of WZ
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Please help with my Aleks.
Answer:
64
Step-by-step explanation:
the total must be 60×4 =240
subtract the miles already given and that us your answer. You could also make an equation. (64+53+59+x)/4=
a box has a volume of 140 cm Square if its breadth is 5 cm and it's length is 7 cm find it's height
Answer:
To find the height of the box, we need to use the formula for volume of a box: Volume = length x breadth x height
Given the values for length and breadth, we can substitute them into the formula and solve for height: 140 = 7 x 5 x height
Simplifying the equation, we get: 140 = 35 x height
Dividing both sides by 35, we get: height = 4
Therefore, the height of the box is 4 cm
what would be the difference in predicted price of two wines that both have a rating of 90, but one is produced in california, and one is produced in oregon? make sure to use your rounded coefficients from the estimated regression equation to calculate this. round your final answer to 2 decimal places. the model predicts that the california wine would be more expensive than the oregon wine.
The model predicts that California wine would be more expensive than Oregon wine by $28.00.
To calculate the difference in predicted price between the two wines, we need to use the estimated regression equation and substitute the values for the variables. Let's say our estimated regression equation is:
Price = 50 + 2.5(Rating) + 10(California) - 8(Oregon)
Both wines have a rating of 90, so we can substitute that value in:
Price of California wine = 50 + 2.5(90) + 10(1) - 8(0) = 295
Price of Oregon wine = 50 + 2.5(90) + 10(0) - 8(1) = 267
Therefore, the predicted price of California wine is $295 and the predicted price of Oregon wine is $267. The difference between the two is $28.00.
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POEEASE HELP ME ISTG I CANT GET ANYONE TO ANSWER MY QUESTIONS ILL GIVE BRAINLIEST PLEASE I BEG YOU
A wooden block is a prism, which is made up of two cuboids with the dimensions shown. The volume of the wooden block is 427 cubic inches.
Part A
What is the length of MN?
Write your answer and your work or explanation in the space below.
Part B
200 such wooden blocks are to be painted. What is the total surface area in square inches of the wooden blocks to be painted?
PLEASE GIVE A SOMEWHAT DETAILED EXPLANATION THANK YOUU!!! ^^
The length of MN is 12 inches, total surface area in square inches of the wooden blocks to be painted is 80400 square inches and
The formula for volume of a cuboid is:
Volume = Length× Width × Height
Thus 427 = (MN × 7× 3) + (5 × 5 × 7)
427 = 21MN + 175
21MN = 252
MN = 252/21
MN = 12
2) Surface area of entire object is:
TSA = 2(12 × 3) + 2(12×7) - (5 × 7) + 2(7×3) + 3(5 × 7) + 2(5 ×5)
= 402 in²
For 200 blocks:
TSA = 200× 402 = 80400 in²
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What is the slope of the line that passes through the points (3, –1) and (–2, –5)?
−5/4
−4/5
4/5
5/4
The slope of the line is 4/5.
Option C is the correct answer.
We have,
The slope of the line that passes through the points (3, -1) and (-2, -5) can be found using the slope formula:
slope = (y2 - y1) / (x2 - x1)
where (x1, y1) and (x2, y2) are the coordinates of the two points.
Plugging in the coordinates, we get:
slope = (-5 - (-1)) / (-2 - 3) = -4 / (-5) = 4/5
Therefore,
The slope of the line is 4/5.
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What equation is graphed in this figure?
Oy+2=-(-2)
Oy-4--(z+2)
Oy-3=(z+1)
Oy+1=-(z-3)
-4 -2
ty
ne
-2-
2
The equation of the graph is determined as y - 1 = 5x/3.
What is the equation of the graph?
The equation of the graph is calculated by applying the general equation of a line form.
y = mx + c
where;
m is the slope of the graphc is the y intercept = 1The slope of the graph is calculated as follows;
m = Δy/Δx
m = (y₂ - y₁ ) / (x₂ - x₁ )
m = ( -4 - 1 ) / (3 - 0)
m = -5/3
y = -5x/3 + 1
y - 1 = 5x/3
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Amani is saving for a scooter with a regular price of $70. The scooter is one sale for 10% off and there is a 5% sales tax. Amani wants to know the total price of the scooter
Amani would need to pay $66.15 for the scooter with the discount and sales tax included.
If the regular price of the scooter is $70, and it is on sale for 10% off, the sale price would be:
Sale price = Regular price - 10% of Regular price
Sale price = $70 - 0.1*$70
Sale price = $63
So the sale price of the scooter is $63.
Next, we need to add the 5% sales tax to the sale price to get the total price of the scooter. To do this, we can calculate the amount of sales tax as:
Sales tax = 5% of the Sale price
Sales tax = 0.05*$63
Sales tax = $3.15
Therefore, the total price of the scooter, including the 10% discount and 5% sales tax, would be:
Total price = Sale price + Sales tax
Total price = $63 + $3.15
Total price = $66.15
So Amani would need to pay $66.15 for the scooter with the discount and sales tax included.
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Calculate the surface area.
25 square inches
120 square inches
126 square inches
132 square inches
The surface area of the figure is 132 square units.
Option D is the correct answer.
We have,
The figure has two types of shapes.
- 3 rectangles
- 2 triangles
Now,
Area of the 3 rectangles.
= 5 x 10 + 4 x 10 + 3 x 10
= 50 + 40 + 30
= 120 square units
Area of 2 triangles.
= 1/2 x 4 x 3 + 1/2 x 4 x 3
= 1/2 x 12 + 1/2 x 12
= 6 + 6
= 12 square units
Now,
Total surface area.
= 120 + 12
= 132 square units.
Thus,
The surface area of the figure is 132 square units.
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an extrinsic reward is enjoying what one does for its own sake and an intrinsic reward is an inducement such as money, grades, or recognition.True or False
False. An intrinsic reward is enjoying what one does for its own sake, while an extrinsic reward is an inducement such as money, grades, or recognition.
Intrinsic and extrinsic rewards are two different types of motivational factors that can influence behavior.
Intrinsic rewards are those that come from within oneself, such as the enjoyment of doing a task or the sense of accomplishment that comes from completing it. These rewards are inherently satisfying and enjoyable, and they motivate people to continue doing the task or activity because of the pleasure they derive from it. For example, a person may engage in a hobby like playing music, painting, or playing a sport simply because they find it enjoyable and rewarding in itself.
On the other hand, extrinsic rewards are external motivators that are used to induce or encourage behavior. These rewards are typically tangible, such as money, grades, or recognition, and are given as a result of completing a task or activity. They are designed to incentivize individuals to perform specific actions, often with the aim of achieving a specific goal or outcome. For example, a person may work hard at their job in order to earn a promotion or raise, or may study hard in school to earn good grades.
Intrinsic and extrinsic rewards can both be effective motivators, but they operate in different ways. Intrinsic rewards are powerful because they come from within the individual and are based on personal enjoyment and satisfaction. Extrinsic rewards, on the other hand, are often seen as less powerful and may only work in the short term, because they are not inherently satisfying and may not motivate people to continue performing the task or activity once the reward is removed. However, when used effectively, extrinsic rewards can be a useful tool for motivating people and achieving specific outcomes.
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Solve the separable differential equation dy / dx = − 0. 6 y , and find the particular solution satisfying the initial condition y (0) = − 9. Y(x) =___
The differential equation solution is y(x) = [tex]-9e^_{(-0.6x)[/tex] for the initial condition y(0) = -9.
The given differential condition is dy/dx = -0.6y. To address this condition, we can isolate the factors by partitioning the two sides by y and duplicating the two sides by dx:
dy/y = -0.6dx
Then, we can incorporate the two sides. On the left side, we get ln|y|, and on the right side, we get -0.6x+C, where C is an inconsistent steady of joining:
ln|y| = -0.6x+C
To find the specific arrangement that fulfills the underlying condition y(0) = -9, we can substitute x = 0 and y = -9 into the situation:
ln|-9| = -0.6(0)+C
Rearranging, we get:
C = ln(9)
In this manner, the specific arrangement that fulfills the underlying condition is:
y(x) = [tex]-9e^_{(-0.6x)[/tex]
This is the last response.
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The complete question is:
Solve the separable differential equation dy/dx = 0.9y, and find the particular solution satisfying the initial condition y(0) = -9. y(x) = e^((0.9/2)x^2-ln(9)).
When rotated about its center, a regular octagon has In addition to rotational symmetry, a regular octagon has symmetry rotational symmetries. Lines of reflectional
6 and 8
8 and 6
8 and 8
6 and 6
A regular octagon has a rotation about its centre that has A regular octagon possesses rotational symmetry in addition to other types of symmetry. Reflective lines 6 and 6. Option d is Correct.
A regular pentagon has five rotational symmetries when it is rotated around its centre. A regular pentagon has _5_ lines of reflectional symmetry in addition to rotational symmetry.
Regular pentagons are regular polygons that have five sides. If a figure has the exact same shape after being rotated by a certain angle with regard to a fixed point in the figure, then that figure exhibits rotational symmetry for that angle.
The figure is considered to have reflectional symmetry if it is the same as the preceding figure when we reflect it with respect to a fixed line. Finding the amount of rotational and reflectional symmetries in a regular pentagon using the aforementioned definitions
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Correct Question:
When rotated about its center, a regular octagon has In addition to rotational symmetry, a regular octagon has symmetry rotational symmetries. Lines of reflectional
a. 6 and 8
b. 8 and 6
c. 8 and 8
d. 6 and 6
If the probability is 0.05 that a certain column will fail under a given load, what are the probabilities that among 16 such columns given that the failure of columns are independents a) At most two will fail.
The probability that at most 2 columns will fail is 0.98.
This is a binomial distribution problem, where the number of trials n = 16, the probability of success (a column failing) p = 0.05, and we want to find the probability of at most 2 columns failing.
To solve this, we need to calculate the probability of 0, 1, or 2 columns failing and add them up.
P(at most 2 columns failing) = P(0 columns failing) + P(1 column failing) + P(2 columns failing)
P(0 columns failing) = (n choose 0) * p^0 * (1-p)^(n-0) = (16 choose 0) * 0.05^0 * 0.95^16 = 0.45
P(1 column failing) = (n choose 1) * p^1 * (1-p)^(n-1) = (16 choose 1) * 0.05^1 * 0.95^15 = 0.38
P(2 columns failing) = (n choose 2) * p^2 * (1-p)^(n-2) = (16 choose 2) * 0.05^2 * 0.95^14 = 0.15
P(at most 2 columns failing) = 0.45 + 0.38 + 0.15 = 0.98
Therefore, the probability that at most 2 columns will fail is 0.98.
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Help need answers!!! 100 POINTS!!! what does x equal, and what does angle m
Answer:
x = 10.1, AXY = 71.7 degrees
Step-by-step explanation:
There are two ways to solve this problem. You could either do 7x+1+108.3=180 or 180-108.3, then take that number and set it equal to 7x+1.
I will be using the latter. (You can do this because angle YXB is a linear pair with angle AXY. This means they add up to 180. So to find angle AXY, you subtract 180 from 108.3)
[tex]180-108.3=71.7\\\\7x+1=71.7\\\\[/tex]
Subtract one from each side to move variables to the left and constants to the right.
[tex]7x+1-1=71.7-1\\\\7x=70.7[/tex]
Divide seven by both sides to isolate the variable.
[tex]\frac{7x}{7}=\frac{70.7}{7} \\\\x=10.1[/tex]
So now we know what x is. So to find AXY, you substitute it back into the equation.
[tex]7(10.1)+1=71.7\\\\70.1+1=71.7?\\\\71.1=71.7?[/tex]
The double dot plot shows the values in two data sets.
Double dot plot shows the values of two data sets. It shows the number line ranges from 10 to 70 showing the following values that appear as dots above the line. For data set A. Two dots above 10. Three dots above 20. Four dots above 30. Two dots above 40. One dot above 50. For data set B. One dot above 30. Three dots above 40. Four dots above 50. Two dots above 60. Two dots above 70.
Compare the data sets using measures of center and variation.
Data set A Data set B
Median $=$
Median $=$
IQR $=$
IQR $=$
The median for Data Set A is 30, and
median for Data Set B is 50.
The IQR for Data Set A is 20 (from 20 to 40), also the IQR for Data Set B is also 20 (from 40 to 60).
What is the explanation for the above ?To find the median we say ......
For data set A, the median is:
The 6th value is the middle value, since there are 12 total values.
The 6th value = 30 on the number line,
since there are 2 dots above 10, 3 above 20, and 4 above 30.
Therefore, the median of data set A is 30.
For data set B, the median is:
The 7th and 8th values are the middle values, since there are 14 total values.
The 7th and 8th values = 50 on the number line,
since there are 4 dots above 50 and 2 dots above 60.
Hence, the median of data set B is 50.
To find the IQR, we need to find the range of the middle 50% of each data set.
For data set A, the IQR is:
The lower quartile is the 3rd value, which = 20 on the number line.
The upper quartile is the 9th value, = 40 on the number line.
The IQR is the difference between the upper and lower quartiles: 40 - 20 = 20.
For data set B, the IQR is:
The lower quartile is the 4th value, = 40 on the number line.
The upper quartile is the 11th value, = 70 on the number line.
Thus,
The IQR = 70 - 40 = 30.
Thus, data set B has a higher median than data set A,
And see that data set B has a larger IQR than data set A.
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Solve using elimination. 10x + 8y = 12 4x + y = –15 ( , )
Answer:
x = -6
Step-by-step explanation:
you have given
10x + 8y = 12 and 4x + y = -15
so you must put the one var. x or y by same cofficent and in opposite sighn
so 10x + 8y = 12
- 8 (4x + y = -15 ) ......... i multiplied by -8
10x + 8y = 12
-32x - 8y = 120
then you will add the equation
(10x + 8y) + (-32x - 8y) = 12 + 120
afeter you simlify it u will get
-22x = 132
-22x = 132
x = -6 .... by dividing both sides by -22
Answer:
(-6,9)
Step-by-step explanation:
Multiply 4x + y = -15 all the say through by -8 and then add to 10x + 8y = 12
-32x -8y = 120
10x + 8y = 12
-22x = 132 Divide both sides by -22
x = -6
Substitute -6 for x
4x + y = -15
4(-6) + y = -15
-24 + y = -15 Add 24 to both sides
y = 9
Check
10x + 8y = 12
10(-6) + 8(9) = 12
-60 + 72 = 12
12 = 12 checks
4x + y = -15
4(-6) + 9 = -15
-24 + 9 = -15
-15 = -15 Checks.
Helping in the name of Jesus.
Each month, Nadeem keeps track of the number of times he visits the library and the number of books he checks out Is there a correlation
you model his data with a linear equation? Is there a causal relationship?
We may draw a scatterplot of the data and compute the correlation coefficient to see whether there is a relationship between Nadeem's visits to the library and the number of books he checks out. Linear Equation = Y =mx+c. Option A is Correct.
The degree and direction of the linear link between two variables are measured by the correlation coefficient. If the correlation is positive, it suggests that if one variable rises, the other variable rises as well.
If there is a correlation, linear regression may be used to describe the data with a linear equation.
Y= mx+c
Based on how frequently Nadeem visits the library, we may use this equation to anticipate how many books he will borrow. Correlation does not always indicate cause, though. Option A is Correct.
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Correct Question:
Each month, Nadeem keeps track of the number of times he visits the library and the number of books he checks out Is there a correlation. you model his data with a linear equation? Is there a causal relationship?
A. There is a positive correlation and no causal relationship.
B. There is a negative correlation and no casual relationship.
C. There is a casual relationship but no positive correlation.
D. There is neither a correlation nor a casual relationship.
