Answer:
a) 96.64% probability that maximum speed is at most 50 km/h
b) 24.67% probability that maximum speed is at least 48 km/h
c) 86.64% probability that maximum speed differs from the mean value by at most 1.5 standard deviations
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean \(\mu\) and standard deviation \(\sigma\), the zscore of a measure X is given by:
\(Z = \frac{X - \mu}{\sigma}\)
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question, we have that:
\(\mu = 46.8, \sigma = 1.75\)
A. What is the probability that maximum speed is at most 50 km/h?
This is the pvalue of Z when X = 50. So
\(Z = \frac{X - \mu}{\sigma}\)
\(Z = \frac{50 - 46.8}{1.75}\)
\(Z = 1.83\)
\(Z = 1.83\) has a pvalue of 0.9664
96.64% probability that maximum speed is at most 50 km/h.
B. What is the probability that maximum speed is at least 48 km/h?
This is 1 subtracted by the pvalue of Z when X = 48.
\(Z = \frac{X - \mu}{\sigma}\)
\(Z = \frac{48 - 46.8}{1.75}\)
\(Z = 0.685\)
\(Z = 0.685\) has a pvalue of 0.7533
1 - 0.7533 = 0.2467
24.67% probability that maximum speed is at least 48 km/h.
C. What is the probability that maximum speed differs from the mean value by at most 1.5 standard deviations?
Z = 1.5 has a pvalue of 0.9332
Z = -1.5 has a pvalue of 0.0668
0.9332 - 0.0668 = 0.8664
86.64% probability that maximum speed differs from the mean value by at most 1.5 standard deviations
For which of the following displays of data is it not possible to find the mean histogram frequency, table, stem, and leaf plot doc plot
The mean from a Histogram, table, and dot plot, it is not possible to determine the mean directly from a stem-and-leaf plot.
Out of the given options, the display of data for which it is not possible to find the mean is the stem-and-leaf plot.
A histogram displays data in the form of bars, where the height of each bar represents the frequency of data within a specific range. From a histogram, it is possible to calculate the mean by summing up the products of each value with its corresponding frequency and dividing it by the total number of data points.
A table presents data in a structured format, typically with rows and columns, allowing for easy calculation of the mean. By adding up all the values and dividing by the total number of values, the mean can be obtained from a table.
A stem-and-leaf plot organizes data by splitting each value into a stem (the first digit or digits) and a leaf (the last digit). While a stem-and-leaf plot provides a visual representation of the data, it does not directly provide the frequency or count of each value. Hence, it is not possible to determine the mean directly from a stem-and-leaf plot without additional information.
A dot plot represents data using dots along a number line, with each dot representing an occurrence of a value. Similar to a histogram and table, a dot plot allows for the calculation of the mean by summing up the values and dividing by the total number of data points.
In summary, while it is possible to find the mean from a histogram, table, and dot plot, it is not possible to determine the mean directly from a stem-and-leaf plot.
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What is the following sum? 125x10
Answer:
1250
Step-by-step explanation:
whenever you multiply by 10 just add a zero to the end of the other number
125 x 10=
1250
In a multiple choice quiz there are 5 questions and 4 choices for each question (a, b, c, d). Robin has not studied for the quiz at all, and decides to randomly guess the answers. What is the probability that
Answer:
\(Pr = 0.140625\)
Step-by-step explanation:
Given
\(n = 5\) --- questions
\(options = 4\) ---- a, b, c or d
Required
The probability that 1st correct question is the 3rd
The probability of selecting the right answer is:
\(p = \frac{1}{options}\)
\(p = \frac{1}{4}\)
\(p = 0.25\)
Using complements, we have:
\(q = 1-p\)
\(q = 1-0.25\)
\(q = 0.75\) --- probability of selecting the wrong answer
The required probability is represented as:
Pr = First is wrong * Second is wrong * Third is correct
\(Pr = q * q * p\)
This gives
\(Pr = 0.75 * 0.75 * 0.25\)
\(Pr = 0.140625\)
Quadrilateral PEST has vertices (0, -5), (9, 2), (12, 13), and (3, 6), respectively.
a) Sketch a graph of the quadrilateral.
b) Classify the quadrilateral as a square, rectangle or rhombus.
c) Determine the intersection point of the diagonals.
will give brainliest :)
Answer:
what they said was correct just took the test
Step-by-step explanation:
Need help will give brainliest and 5 stars for the fastest answers with work.
The function required is g(x) = 2 + x - 4 + (3 - c + b) where a = 4-2+b-c, b = 6 - 3 + c, and c = 2-a-2+b.
What is function?Function is a relationship between two variables. It is represented by an equation that shows the values of one variable in terms of the other.
We can create a new function g(x) to transform f(x) so that it includes the point (-2, 2).
To do this, we need to find the values of a, b, and c where g(x)= a+(x-b)+c.
We know that f(2)=4, f(3)=4, and f(2)=2. We can use these points to solve for a, b, and c.
To solve for a, we can plug in x=2 and solve for a:
a+2-b+c = 4
a = 4-2+b-c
To solve for b, we can plug in x=3 and solve for b:
a+3-b+c = 4
b = 4-a-3-c
To solve for c, we can plug in x=2 and solve for c:
a+2-b+c = 2
c = 2-a-2+b
Now that we have a, b, and c, we can plug them into the equation
g(x) = a + (x-b) + c and get:
g(x) = 4 - 2 + (x - (4-a-3+c)) + (2 - a - 2 + b)
g(x) = 4 - 2 + (x - 4 + a + 3 - c) + (-a - 2 + b + 2)
g(x) = 4 - 2 + (x - 4) + (a + 3 - c - a - 2 + b + 2)
g(x) = 4 - 2 + x - 4 + (3 - c + b)
g(x) = 2 + x - 4 + (3 - c + b)
When we plug in x = -2, we get:
g(-2) = 2 - 2 - 4 + (3 - c + b)
g(-2) = -4 + (3 - c + b)
g(-2) = 2
We can now solve for c and b using the above equation:
-4 + (3 - c + b) = 2
3 - c + b = 6
b = 6 - 3 + c
Therefore, g(x) = 2 + x - 4 + (3 - c + b) where a = 4-2+b-c, b = 6 - 3 + c, and c = 2-a-2+b is the function required.
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Can anyone please solve this
The answers include the following:
61324318111566What is Addition?This is referred to as a mathematical operation in which two or more numbers or quantities are added together to form a sum.
3x = 18
x = 18/3 = 6
x+9 =22
x = 22-9 = 13
x/4 = 6
x = 6 × 4 = 24
x-12 =19
x = 19+12 =31
2x + 9 = 25
2x = 25-9 =16
x=16/2 = 8
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What function matches the table
A town's population of children increased from 376 to 421 during the past year.
Which equation shows how to find the percent increase?
Answer:
The percentage increase equation is:
Percentage Increase = [ (Final Value - Starting Value) / |Starting Value| ] × 100
The percentage increase = 11.97%
Step-by-step explanation:
Given
Starting Value = 376
Final Value = 421
To determine
Percentage Increase =?
The percentage increase equation:
Percentage Increase = [ (Final Value - Starting Value) / |Starting Value| ] × 100
= [(421 - 376) / (376)] × 100
= [45 / 376] × 100
= 11.97%
Therefore, the percentage increase = 11.97%
Answer:
3700 kings
Step-by-step explanation:
how many solutions does this equations have 3(2.4x+4)=4.1x+7+3.1x?
Answer:
3(2.4x+4)=4.1x+7+3.1x has no solutions.
The base of a regular pyramid is a hexagon.
The figure shows a regular hexagon with center C. An apothem is shown as a dashed segment perpendicular to an edge and is labeled as a. A dashed line segment joins the center with the left vertex of the edge perpendicular to the apothem. This segment has a length of 8 centimeters. The angle formed by the edge and the segment measures 60 degrees.
What is the area of the base of the pyramid?
Enter your answer in the box. Express your answer in radical form.
Answer:
\(216\sqrt{3}\) \(cm^{2}\)
Step-by-step explanation:
Length of edge:
\(12\)
Length of apothem:
\(\frac{\sqrt{3}}{2}*12\)
\(6\sqrt{3}\)
3 × Length of edge × Length of apothem:
\(3*12*6\sqrt{3}\)
\(216\sqrt{3}\)
The answer is 96√3 cm²
PLEASE HELP!!!!! QUICK!! LOTS OF POINTSSSS!!!!!
Answer:
B
Step-by-step explanation:
I did That before
Answer:
the answer is d hope this helped
Step-by-step explanation:
A bakery offers a sale price of $3.00 for 6 muffins. What is the price per dozen?
Answer:
$6.00
Step-by-step explanation:
In order y find the cost of one muffin, we divide the price of 6 muffins by 6.
$3.00 / 6 = $0.50
Therefore, the cost of one muffin is $0.50.
To find the price per dozen, we multiply the cost of one muffin by 12.
$0.50 * 12 = $6.00
Therefore, the price per dozen muffins is $6.00.
What is the solution to this inequality? 1/3x − 7>−4
Add 7 to both sides.
1/3x > −4 + 7Add −4 and 7 to get 3.
1/3x > 3Multiply both sides by 3, the reciprocal of 1/3 . Since 1/3 is >0, the direction of inequality remains the same.
x > 3 × 3Multiply 3 and 3 to get 9.
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x = √2x-1
Simplify each equation. Make sure to check for extraneous solutions
x= V2 x-1
x-V2 x= -1
x+x = 1/V2
2x = 1/V2
x = 1/2V2
x = V2/4
. Sinaia is having a birthday party with snacks and activities for her guests. At one table, five
people are sharing three-quarters of a pizza. What equal-sized portion of the whole pizza will
each of the five people receive?
Answer:
1/5 or 0.2 of the whole pizza
but it says that theres only 3/4 of the pizza there. so 3/4 of a pizza eaten by 5 people each person would get 0.15 of the pizza
Step-by-step explanation:
Write a paragraph proof of the Triangle Proportionality Theorem.
(Theorem 8.6)
__ __
Given: BD || AE
Prove: BA/CB = DE/CD
The Triangle Proportionality Theorem, also known as the Side Splitter Theorem, states that if a line is parallel to one side of a triangle, then it divides the other two sides proportionally.
Triangle Proportionality Theorem:
To prove this theorem, we begin by drawing a ΔABC with a line DE parallel to side AB. We then draw lines BD and CE, which intersect the parallel line DE at points F and G, respectively. By the properties of parallel lines, we know that ∠ADE and ∠ABD are congruent, and ∠AED and ∠ADB are congruent. Similarly, ∠CDE and ∠BDC are congruent, and ∠CED and ∠DCB are congruent.
We can then use the properties of similar triangles to show that ΔADE and ΔABC are similar, as are ΔCDE and ΔACB. This means that the ratios of corresponding side lengths are equal:
BA/DE = CA/CE and CB/DE = AB/BD
We can then substitute CA - BA for CB in the first equation, and BD for AB in the second equation:
BA/DE = (CA - BA)/CE and CB/DE = BD/(CA - BA)
Cross-multiplying both equations, we obtain:
BA * CE = DE * (CA - BA) and CB * DE = BD * (CA - BA)
Adding the two equations, we get:
BA * CE + CB * DE = (DE + CE) * CA
Dividing both sides by CB * DE, we obtain:
BA/CB = (DE + CE)/CE * CA/DE = DE/CD
Thus, we have proven the Triangle Proportionality Theorem.
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help me please How would you informally prove that you are taking courses online?
A) You could show a registrar’s receipt with the current date.
B) You could show your course notes with the current date.
C) You could repeat all the material you learned.
D) You could ask for an enrollment verification notice from the school.
The conditional statement is solved and you could ask for an enrollment verification notice from the school
Given data ,
Let the statement be informally proven that you are taking courses online
And , To informally prove that you are taking courses online, you can contact the professors of the courses via email and obtain informal permission from them first.
Then you can initiate the request using the new online information system of the school to obtain an enrollment verification notice
It is a legitimate document that the school has produced that may be utilized for a number of things, including debt deferments, employment, and insurance.
Hence , the conditional statement is solved
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Fill in the missing values below one at a time to find the quotient when x^3 - x^2 - 3x + 2 is divided by x - 2.
Therefore, the quotient when x³ - x² - 3x + 2 is divided by x - 2 is x² - 2x - 5 with a remainder of -3.
To find the quotient when x³ - x² - 3x + 2 is divided by x - 2, we will use the long division method. Here is the solution:
Step 1: The first term of the quotient is x². Multiply x² by x - 2 to get x³ - 2x². Subtract this product from x³ - x² to get: x² - 3x² = -2x²
Step 2: Bring down the next term of the dividend, which is -3x. The new dividend is -2x² - 3x.
Step 3: The second term of the quotient is -2x. Multiply -2x by x - 2 to get -2x² + 4x. Subtract this product from -2x² - 3x to get -5x.
Step 4: Bring down the last term of the dividend, which is +2. The new dividend is -5x + 2. Step 5: The third term of the quotient is -5. Multiply -5 by x - 2 to get -5x + 10. Subtract this product from -5x + 2 to get -3.
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Match each expression with A, B, C or D.
A=a^3
B=6a
C=12a
D=3a^2
i)3a x 4
ii)a^2xa
iii) 6 1/2 a^2
The matching expressions are:
\(i) 3a x 4 = C (12a)\\ii) a^2 x a = A (a^3)\\iii) 6 × 1/2 a^2 = D (3a^2)\)
i) 3a x 4 can be represented as C (12a) since multiplying 3a by 4 gives 12a.
ii) a^2 x a can be represented as A (a^3) since multiplying a^2 by a gives a^3.
iii) \(6 \times 1/2 a^2\) can be represented as D (3a^2) since multiplying 6 by 1/2 and then by a^2 gives 3a^2.
To understand the matching expressions, let's break down each one:
i) 3a x 4:
This expression represents multiplying a variable, 'a', by a constant, 4. The result is 12a, which matches with C (12a).
ii) a^2 x a:
This expression represents multiplying the square of a variable, 'a', by 'a' itself. This results in a^3, which matches with A (a^3).
iii) 6 × 1/2 a^2:
This expression involves multiplying a constant, 6, by a fraction, 1/2, and then multiplying it by the square of 'a', a^2. The final result is 3a^2, which matches with D (3a^2).
Therefore, the matching expressions are:
i) 3a x 4 = C (12a)
ii) a^2 x a = A (a^3)
iii) 6 × 1/2 a^2 = D (3a^2)
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An arctic cold front is moving through an area. It is 37F when the temperature begins to drop. The scatter plot suggests a linear relationship between the temperature and the number of hours since the cold front arrived. Use the scatter plot to answer parts ac.
Answer: The slope describes the change in temperature for every hour after the cold front arrives.
Step-by-step explanation:
The Monday relates to the Thursday so than, the Friday relation the ….? A: Tuesday B : Saturday C : Sunday D: Monday E:
Wednesday
Answer:
The correct answer is B: Saturday.
The relationship between Monday and Thursday is that they are two days apart in a typical Monday-to-Sunday week. Similarly, Friday is also two days apart from Tuesday in a typical week, so the relationship between Friday and Tuesday would be the same as the relationship between Monday and Thursday. Therefore, the correct answer is B: Saturday.
I can prove that 2=1, where is the error?
X = 1
X+X = 1+X
2x = 1+X
2x = X+1
2X-2 = X+1-2
2x-2 = X-1
2 (x-1)/(x-1) = X-1/X-1
2 times 1 = 1 1-1 / 1-1
2 = 1
I subtracted -2
because thats the # I chose to subtract with.
The mistake is when you try to divide by X - 1, because you can't divide by zero.
Where is the problem in this procedure?Here we start by defining:
X = 1
The second step makes sense, we are adding the same value in both sides:
X + X = X + 1
2X = X + 1
Now subtract 2 in both sides:
2X - 2 = X + 1 - 2
2X - 2 = X - 1
Here is the mistake, you divide both sides by X - 1
But we already defined that X = 1
Then you are trying to divide by zero, and that opeartion is not defined, that is why you reach a false equation.
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Write an equation of the line that passes through the point (4, –5) with slope 2.
A. y−4=2(x+5)
B. y−4=−2(x+5)
C. y+5=2(x−4)
D. y+5=−2(x−4)
After answering the provided question, we can conclude that The slope answer is not listed as a choice, but this is the correct equation.
what is slope?In mathematics, slope is the slope of the regression of a line or curve. It is a measure of the degree to which a function's y-value varies once the x-value changes. A line's slope is usually expressed as a letter m and is able to be calculated as follows: m = (y2 - y1) / (x2 - x1) (x1, y1) and (x2, y2) is some two important points on the line. The slope of a line can be favorable, negative, equal to 0, or unknown. A positive slope means the line rises up from left to right, whereas a slope means the line falls back from left to right.
To find the equation of the line passing through the point (4,-5) with slope 2, we can use the point-slope form of the equation of a line.
y - y1 = m(x - x1)
y - (-5) = 2(x - 4)
y + 5 = 2x - 8
y = 2x - 13
y = 2x - 13
The answer is not listed as a choice, but this is the correct equation.
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What is x^2-2 in factored parentheses form?
\( {x}^{ 2 - 2} = {x}^{0} = 1\)
ok done. Thank to me :>
Polygon A B C D E has 5 sides. Which is a correct description of the polygon? It is a concave pentagon because segment AE would extend into the inside of the polygon, and it has five sides. It is a convex hexagon because it has six sides and none of the sides would extend into the inside of the polygon. It is a concave hexagon because segment AE would extend into the inside of the polygon, and it has six sides. It is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.
Answer:
It is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.
Step-by-step explanation:
Polygons are plane shapes with more than three sides. They are named after the number of their sides. Examples are trigon (3 sides), hexagon (6 sides), nonagon (9 sides) etc.
in the question, the given polygon ABCDE is a pentagon because it has five sides. And it would be a convex pentagon with none of its sides extending into the interior of the polygon.
Answer:
D-It is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon. Edu 2020
Step-by-step explanation:
18 2/3 divided by 1/3
Answer:
56
Step-by-step explanation:
HELP HELP PLEASE I BARELY HAVVE ANYTIME LEFT PLEASE HEL;P ME OUT
1/4
Step-by-step explanation:
I used points (4,2) and (8,3).
The average cost to build a 4 , 000 sq ft fast-food restaurant in Miami is about $ 952 , 000 . Find the average cost per square foot to build a fast-food restaurant.
Average cost per square foot to build a fast-food restaurant is $238 .
What is division?The division is the process of repetitive subtraction. It is the inverse of the multiplication operation. It is defined as the act of forming equal groups. While dividing numbers, we break down a larger number into smaller numbers.
Given,
Area of the restaurant = 4000 sqft
Total average cost to build the restaurant
= $952000
Average cost of per sqft
= 952000/4000
= $238
Hence, $238 is the average cost per square foot to build a fast-food restaurant.
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What is 60 percent of 92?
O 1.53
0 5.52
O 15.3
0 55.2
60 percent of 92 is 55.2 after applying the concept of the percentage, option (D) 55.2 is correct.
What is the percentage?It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.
It is given that:
60 percent of 92
Let x be the 60 percent of the 92
x = 60 % of 92
x = (60/100)92
x = 55.2
Thus, 60 percent of 92 is 55.2 after applying the concept of the percentage, option (D) 55.2 is correct.
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Which angles below are equal to ∠CDB?
Answer:
(x) ∠CAB
Step-by-step explanation:
In ΔCOD and ΔBOA
\(\frac{OA}{OB} = \frac{OD}{OC} \\\\\implies \frac{OC}{OB} = \frac{OD}{OA}\)
Also,
∠COD = ∠BOA (vertically opposite angles)
⇒ ΔCOD and ΔBOA are similar
⇒ ∠CDO = ∠BAO
⇒ ∠CDB = ∠BAC
⇒ ∠CDB = ∠CAB