Answer:
OD
Step-by-step explanation:
Angles in a triangle add to 180 degrees. The only set of angles which total to 180 is the values in OD
Anthony went on a bike ride. He rode two-thirds of a mile in three-fourths of an hour. What was his biking speed in miles
per hour?
Answer:
Speed= distance/ time
Speed= (2/3)/(3/4) = 0.88 miles/hr
Given right triangle � � � ABC with altitude � � ‾ BD drawn to hypotenuse � � ‾ AC . If � � = 5 AD=5 and � � = 55 , AC=55, what is the length of � � ‾ AB in simplest radical form?
The length of AB in simplest radical form is 8.06.
We can find the length of AB using the principle of similar triangles on the triangles ABD and ABC.
Considering triangle ABD, given that AD = 5 then
Cos A = AD/AB
Also,
Cos A = AB/AC
Given that AD = 5, AC = 13, AB = x
therefore,
x/13 = 5/x
x² = 65
x = √65
= 8.06
Hence, the length of AB in simplest radical form is 8.06.
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In a state's lottery, you can bet $4 by selecting three digits, each between 0 and 9 inclusive If the same three numbers are drawn in the same order, you win and collect $500. Complete parts (a) through (e) a. How many different selections are possible? b. What is the probability of winning? (Simplify your answer.) c. If you win, what is your net profit?___ $ (Type an integer or a decimal. Do not round) d. Find the expected value for a $4 bet.___ $ (Type an integer or a decimal. Do not round) e. If you bet $4 on a certain casino game, the expected value is -1.7¢ Which bet is better in the sense of producing a higher expected value a $4 bet on the state's loftery or a S4 bet on the casino game? Explain. O A. Neither bet is better because both games have the same expected value O B. It is impossible to compare the values because they have different units. C. The casino game is a better bet because it has a larger expected value.
The expected value of a $4 bet on the state's lottery is -$0.84 and the expected value of a $4 bet on the casino game is -1.7¢ (which is equivalent to -$0.017), the state's lottery is a better bet in terms of producing a higher expected value.
a. There are 10 possible choices for each of the three digits, so the total number of different selections is 10 x 10 x 10 = 1000.
b. Since there is only one winning combination out of the 1000 possible selections, the probability of winning is 1/1000.
c. If you win, your net profit would be $500 - $4 = $496.
d. The expected value is the sum of the products of each possible outcome and its probability. In this case, the expected value is (1/1000) x $500 + (999/1000) x (-$4) = -$0.84.
e. Since the expected value of a $4 bet on the state's lottery is -$0.84 and the expected value of a $4 bet on the casino game is -1.7¢ (which is equivalent to -$0.017), the state's lottery is a better bet in terms of producing a higher expected value.
This is because the expected loss for the state's lottery is smaller than the expected loss for the casino game.
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look at the figure. each edge of this cube measures 8 ft. each face of the cube measures 64 sq ft. what is the surface area of this cube?
The surface area of this cube is 384 sq ft.
To find the surface area of this cube:
You can follow these steps:
STEP 1: Identify the number of faces on the cube: A cube has 6 faces.
STEP 2: Determine the area of each face: Each face measures 64 sq ft.
STEP 3: Calculate the surface area: Multiply the area of each face by the total number of faces.
Surface area = (Area of each face) x (Total number of faces)
Surface area = (64 sq ft) x (6)
Surface area = 384 sq ft
The surface area of this cube is 384 sq ft.
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At a large company banquet for several thousand employees and their families, many of the attendees became ill the next day. The company doctor suspects that the illness may be related to the fish, one of three options for the main course. Because all the dinner guests had to preorder their meal, the doctor was able to randomly select and contact 80 people that ate the fish, of which 64 people got sick. The doctor also randomly selected (and contacted) 60 people that did not eat the fish, of which 39 people got sick. The doctor also knows that at least 1000 attendees ordered the fish.
(a) Is this convincing evidence that the true proportion of all attendees who ate the fish that got sick is more than the true proportion of all attendees who did not eat the fish that got sick?
Part A: The given evidence is convincing to provide the true proportion regarding the attendees.
Part B: The error is a type 1 error in the hypothesis testing.
Type 1 Error and Type 2 Error
A type 1 error in hypothesis testing occurs when a null hypothesis is rejected when it is true.
A type II error in hypothesis testing occurs when the investigator fails to reject the null hypothesis that is actually false.
Given that,
the total number of attendees who ordered fish is 1000.
And, The random selection for the sample size of the attendees who ate fish is 80 of which 64 people got sick.
Hence, The number of attendees who ate the fish and got sick is calculated as given below.
No. of attendees = 64/80
% of No. of attendees = 64/80 x 100
% of No. of attendees = 80%
The random selection for the sample size of the attendees who did not eat fish is 60 of which 39 people got sick.
The number of attendees who did not eat the fish and got sick is calculated as given below.
No. of attendees = 39/60
% of No. of attendees = 39/60 x 100
% of No. of attendees = 65%
Hence, For Part A;
The given evidence is convincing to provide the true proportion of all attendees who ate the fish that got sick is more than the true proportion of all attendees who did not eat the fish that got sick.
For Part B;
The mistake here is that the doctor's theory (hypothesis) got rejected regarding the number of attendees who ate the fish got sick than those who did not eat the fish.
This error is a type 1 error in the hypothesis testing.
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Q2 In a triangle, the sum of its base and height is 12cm. a) What is the maximum possible area of the triangle? (4 marks) b) What are the base and height of the triangle found in (a)? (2 marks)
To find the maximum possible area of a triangle with a given sum of base and height, we will use the formula for the area of a triangle:
Area = 1/2 × base × height
Given that the sum of base and height is 12cm, let's denote base as "b" and height as "h". We have:
b + h = 12
To maximize the area, we want to maximize the product of base and height. From the given equation, we can express height as:
h = 12 - b
Now, let's substitute this into the area formula:
Area = 1/2 × b × (12 - b)
To find the maximum area, we will find the critical points of this equation by taking the derivative with respect to b:
d(Area)/db = 1/2 × (12 - 2b)
Set the derivative equal to zero and solve for b:
0 = 1/2 × (12 - 2b)
0 = 12 - 2b
b = 6
Now that we have the base, we can find the height using the given equation:
h = 12 - b
h = 12 - 6
h = 6
So, the maximum possible area of the triangle is:
Area = 1/2 × 6 × 6 = 18 cm²
To summarize:
a) The maximum possible area of the triangle is 18 cm².
b) The base and height of the triangle found in (a) are both 6 cm.
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A sociologist took a random sample of 1200 drivers and found that 59 of the 610 men in the sample had received a speeding ticket, while 28 of the 590 women in the sample had received a speeding ticket. The sociologist used those results to make a 99% confidence interval to estimate the difference between the proportion of male and female drivers who have received a speeding ticket (PM - Pw). The resulting interval was (0.011, 0.087). They want to use this interval to test H: PM = Pw versus HPM # pw at the a = 0.01 significance level. Assume that all conditions for inference have been met. Based on the interval, what do we know about the corresponding P-value and conclusion at the a = 0.01 level of significance? a. The P-value is greater than a = 0.01, and they should conclude that there is a difference between the proportions. b. The P-value is greater than a = 0.01, and they cannot conclude that there is a difference between the proportions. c. The P-value is less than a = 0.01, and they should conclude that there is a difference between the proportions. d. The P-value is less than a = 0.01, and they cannot conclude that there is a difference The P-value is less than a between the proportions.
The P-value is less than a = 0.01, and they should conclude that there is a difference between the proportions.
The confidence interval for the difference between the proportion of male and female drivers who have received a speeding ticket is (0.011, 0.087), which means that we are 99% confident that the true value of the difference in proportions falls within this interval.
To test the null hypothesis H: PM = Pw versus H: PM ≠ Pw, we need to see if the confidence interval includes the null value of 0. If it does not, then we can reject the null hypothesis and conclude that there is a significant difference between the proportions of male and female drivers who have received a speeding ticket.
Since the confidence interval does not include the null value of 0, we can conclude that there is a significant difference between the proportions of male and female drivers who have received a speeding ticket. The P-value is less than a = 0.01, which means that the probability of obtaining a difference in proportions as extreme as or more extreme than the one observed, assuming that the null hypothesis is true, is less than 0.01. Therefore, we reject the null hypothesis and conclude that there is a statistically significant difference between the proportions of male and female drivers who have received a speeding ticket. The correct answer is c. The P-value is less than a = 0.01, and they should conclude that there is a difference between the proportions.
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if a point (x,y) is equidist point from the point (2,3) and (6,1) show that the equation of locus is given by 2x -y =8
If a point (x,y) is equidist point from the point (2,3) and (6,1) then the equation of locus is given by 2x -y =6
Using distance formula, the distnace between point (x, y) and (2, 3) is,
d₁ = √[(2 - x)² + (3 - y)²]
And the distnace between point (x, y) and (6, 1) is,
d₂ = √[(6 - x)² + (1 - y)²]
A point (x,y) is equidist point from the point (2,3) and (6,1)
⇒ d₁ = d₂
⇒ √[(2 - x)² + (3 - y)²] = √[(6 - x)² + (1 - y)²]
⇒ (2 - x)² + (3 - y)² = (6 - x)² + (1 - y)²
⇒ 4 - 4x + x² + 9 - 6y + y² = 36 - 12x + x² + 1 - 2y + y²
⇒ -4x + 12x - 6y + 2y = 37 - 13
⇒ 8x - 4y = 24
⇒ 2x -y = 6
Hence proved.
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The complete question is:
if a point (x,y) is equidist point from the point (2,3) and (6,1) show that the equation of locus is given by 2x -y = 6
5 - c for c = 3
can someone salve this for me
The value of the equation 5- c for c = 3 will be 2.
Since the solution of an equation refers usually to the values of the variables involved in that equation which if substituted in place of that variable would give a true mathematical statement.
We need to find the solutions does the equation 5 - c for c = 3;
Now solving for c;
5-c
for c = 3
5 - 3 = 2
Therefore, the value is 2.
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5. Evaluate cos(0.573 + jo.783) and express the results in polar form. 6.Solve for y: cos2x + jsinycosy - sin2x = 0.866 +0.5 7. Find the Laplace transform of f(t) = sin? 5t 8. Find the Laplace transform of f(t) = -2t+2 sint
The results in polar form is cos(0.573) + j sin(0.783). The solution for y is 0.866 +0.5. The Laplace transform is F(s) = 5 / (s² + 25) and F(s) = (-2 / s²) + (2 / (s² + 1)), respectively.
To evaluate cos(0.573+j0.783), we use the polar form of a complex number
cos(θ) + j sin(θ).
Therefore, we have
cos(0.573+j0.783) = cos(0.573) + j sin(0.783).
To solve for
y= cos2x + jsinycosy - sin2x = 0.866 + 0.5,
we can use the trigonometric identity cos(2x) - sin(2x) = 1.
Substituting this into the equation gives:
cos(2x) + jsin(y)cos(y) - (cos(2x) - sin(2x)) = 0.866 + 0.5.
Simplifying this equation results in
jsin(y)cos(y) + sin(2x) = 0.866 + 0.5.
The Laplace transform of f(t) = sin(5t) is F(s) = 5 / (s² + 25), where s is the Laplace variable.
The Laplace transform of f(t) = -2t + 2sin(t) is F(s) = (-2 / s²) + (2 / (s² + 1)), where s is the Laplace variable.
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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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8.) Jordan needs to save at least $150 to ride the
bus to his grandparent's home. If he saves $12 a
week, what is the least number of weeks he
needs to save?
Answer:
[tex]12w \geqslant 150[/tex]
[tex]w \geqslant 12.5[/tex]
So Jordan needs to save $12 a week for at least 13 consecutive weeks.
what ud a factor of a natural number
Every composite number has at least one natural number factor other than 1 and itself. The correct answer is option D.
A composite number is a natural number larger than one that is not a prime number, implying that it has at least one element other than 1 and itself.
As a result, every composite number has at least one natural number factor that is neither 1 nor itself.
The smallest natural number that can divide all of the numbers in the integer list is 1.
When we divide a number by itself, we obtain 1 as the component.
Hence, the correct answer is option D.
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The complete question is as follows:
What is 1 of a natural number factor?
A. every
B. odd
C. even
D. composite
Is there a rigid transformation that would map ΔABC to ΔDEC?
Yes, there is a rigid transformation that would map ΔABC to ΔDEC
Checking if there is a rigid transformationFrom the question, we have the following parameters that can be used in our computation:
The triangles ABC and DEC
From the figure of the the triangles, we can see that
The triangles can be rotated to map one over the other
This is because the triangles have two congruent angle and two congruent sides i.e. they are similar by SAS
Hence. there is a rigid transformation that would map ΔABC to ΔDEC
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Ms. Mahoney is teaching shapes to a kindergarten class and is explaining the difference between geometric and organic shapes.
Square - Geometric
Triangle - Geometric
Leaf - Organic
Hand - Organic
Star - Geometric
Snowflake - Geometric
Geometric shapes are defined as shapes that have a clear and defined outline, uniformity in their angles, and consistent measurements. Examples of geometric shapes include squares, triangles, and stars. These shapes are typically man-made and are commonly found in architecture and design.
On the other hand, organic shapes are irregular and asymmetrical in nature, often resembling forms found in nature. Examples of organic shapes include leaves, hands, and clouds. These shapes are often found in art and can evoke a sense of movement and fluidity.
When teaching shapes to a kindergarten class, it is important to differentiate between geometric and organic shapes to help children understand the unique characteristics of each. This can help develop their cognitive and spatial skills and encourage creativity in their art and design projects.
Overall, the distinction between geometric and organic shapes is an important concept to introduce to young children, as it lays the foundation for future learning in math and design. By teaching them the differences between these two types of shapes, we can help them develop a deeper understanding of the world around them.
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Name That Scenario: Mail Time We've seen many different scenarios, so let's practice identifying our parameter of interest. Write the appropriate symbol for the parameter of interest for each of the following inference procedures. While not required, you may also think about what type of inference procedure (confidence interval or hypothesis test) would be most appropriate. a) A dorm manager would like to estimate the percentage of all mail items received at the dorm that are considered packages, defined as an item that cannot fit in the dorm mailbox. Type Markdown and LaTeX:
α 2
b) A FedEx warehouse manager would like to assess if the average number of packages sent from online retailers to a neighborhood in Champaign is greater than the average number of packages sent from online retailers to a neighborhood in Urbana. Type Markdown and LaTeX:
α 2
c) A bakery sells many products, including cookies \& cakes. The bakery offers both shipping and store pick-up on the products. The bakery manager woulc like to estimate the difference in store pick-up rates between all cookies and all cakes sold by the bakery. Type Markdown and LaTeX:
α 2
d) How long does mail delivery take? In a review of a mail delivery company, the reviewers would like to examine if there is an association between the weight of the package and the delivery time (the time for the package from pickup to delivery). Type Markdown and LaTeX:
α 2
a) The parameter of interest is the percentage of mail items received at the dorm that are considered packages. This can be denoted as p, where p is the proportion of packages out of all mail items received at the dorm. A confidence interval would be most appropriate for this inference procedure.
b) The parameter of interest is the difference in the average number of packages sent from online retailers to a neighborhood in Champaign and the average number of packages sent from online retailers to a neighborhood in Urbana. This can be denoted as μ1 - μ2, where μ1 is the average number of packages sent to Champaign and μ2 is the average number of packages sent to Urbana. A hypothesis test would be most appropriate for this inference procedure.
c) The parameter of interest is the difference in store pick-up rates between all cookies and all cakes sold by the bakery. This can be denoted as p1 - p2, where p1 is the proportion of cookies that are picked up in store and p2 is the proportion of cakes that are picked up in store. A confidence interval would be most appropriate for this inference procedure.
d) The parameter of interest is the association between the weight of the package and the delivery time. This can be denoted as ρ, where ρ is the correlation coefficient between the weight of the package and the delivery time. A hypothesis test would be most appropriate for this inference procedure.
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The graph of a quadratic function with vertex (1,-1) is shown in the figure below. Find the domain and the range. Write your answers as inequalities, using or as appropriate. Or, you may instead click on "Empty set" or "All reals" as the answer.
The domain of the function is all real numbers and range is y ≥ -1.
Since the vertex is at (1,-1), the axis of symmetry is x = 1.
This means that the domain of the function is all real numbers.
To find the range, we need to consider the y-values of the graph. Since the vertex is the lowest point of the graph, the range must be all y-values greater than or equal to -1.
However, since the parabola opens upwards, there is no upper bound on the y-values.
Therefore, the range is given by y ≥ -1.
Hence, the domain of the function is all real numbers and range is y ≥ -1.
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4 1/9 minus 3 3/5 i’m begging you
Answer: 23/45 or 0.51 rounded to the nearest hundredth
Step-by-step explanation:
4 1/9 can be written as 37/9, and 3 3/5 can be written as 18/5.
37/9-18/5 = (185/45) - (162/45) = 23/45 or 0.51
Given a normalized probability density function P(x) of finding the variable x in the interval [x, x + dx], write the definition for a) the mean value (x), b) the variance o2 = ((x - (x))), and c) the standard deviation of the variable x.
a) The mean value of the variable x is defined as the weighted average of x over the interval [x, x + dx], where the weights are given by the probability density function P(x). Mathematically, it is expressed as x = ∫x(x+dx) P(x) dx
b) The variance of the variable x, denoted by σ², is defined as the weighted average of the squared deviations of x from its mean value, where the weights are given by the probability density function P(x). Mathematically, it is expressed as σ² = ∫(x-x)2 P(x) dx
c) The standard deviation of the variable x, denoted by o, is the square root of the variance. Mathematically, it is expressed as σ = √σ² These definitions hold true for any normalized probability density function of the variable x over the interval [x, x + dx].
Given a normalized probability density function P(x) of finding the variable x in the interval [x, x + dx], the definitions for the mean value, variance, and standard deviation are as follows:
a) The mean value (µ) of the variable x is defined as the expected value, which can be calculated using the integral:
µ = ∫xP(x)dx, where the integral is taken over the entire range of x.
b) The variance (σ²) is defined as the average squared deviation from the mean value (µ). It can be calculated using the integral:
σ² = ∫(x - µ)²P(x)dx, where the integral is taken over the entire range of x.
c) The standard deviation (σ) of the variable x is defined as the square root of the variance:
σ = sqrt(σ²)
These definitions will help you analyze the given probability density function and understand its central tendency and dispersion.
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1. Plot the point (-1, -3,1)
-
2.
A graph which represent the points (-1, -3) and (1, -2) is shown in the image below.
What is an ordered pair?In Mathematics and Geometry, an ordered pair is a pair of two elements or data points that are commonly written in a fixed order within parentheses as (x, y), which represents the x-coordinate (abscissa) and the y-coordinate (ordinate) on the coordinate plane of any graph.
How to identify and plot the coordinates points and quadrants?Based on the cartesian coordinate (grid) below, the coordinates points and quadrants should be identified as follows;
Point (-1, -3) → quadrant 3.
Point (1, -2) → quadrant 4.
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Complete Question:
Plot the points (-1, -3) and (1, -2)
की Reduce the following CFG to Greibach Normal Form s → CA BB BSB сь Aa 5. a) Define the condition for acceptability of strings using final state and null stack method. (3 marks)
The automaton starts in the initial state q0, reads the input string w, and uses the stack to keep track of the non-terminals in the production rules.
To reduce the given CFG to Greibach Normal Form (GNF), we can follow these steps:
Step 1: Eliminate the start symbol from the right-hand side of any production by introducing a new non-terminal symbol S0 and a new production S0 → S.
S0 → S
S → CA
A → BB
B → SB
S → CBA
S → a
Step 2: Eliminate the productions with more than one non-terminal on the right-hand side.
S0 → S
S → CAA1
A1 → BA2
A2 → SB
B → SB
S → CBAA3
A3 → a
Step 3: Convert the remaining productions into GNF form by replacing the first non-terminal symbol on the right-hand side with a terminal symbol or a new non-terminal symbol.
S0 → S
S → CAZ
Z → AZ
A → BBY
Y → SB
B → SB
S → CBAW
W → A3
A3 → a
The resulting CFG is in Greibach Normal Form.
To define the condition for acceptability of strings using final state and null stack method, we need to consider the corresponding pushdown automaton. If the automaton reaches a final state and the stack is empty, then the input string is accepted.
Formally, let P = (Q, Σ, Γ, δ, q0, Z0, F) be a pushdown automaton, where Q is the set of states, Σ is the input alphabet, Γ is the stack alphabet, δ is the transition function, q0 is the initial state, Z0 is the initial stack symbol, and F is the set of final states.
A string w ∈ Σ* is accepted by P using final state and null stack method if there exists a sequence of configurations
(q0, w, Z0) ⇒* (qf, ε, ε)
such that qf ∈ F and the stack is empty.
In other words, the automaton starts in the initial state q0, reads the input string w, and uses the stack to keep track of the non-terminals in the production rules. If it reaches a final state qf and the stack is empty, then the input string w is accepted.
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Given f of x is equal to the quantity x plus 6 end quantity divided by the quantity x squared minus 9x plus 18 end quantity, which of the following is true? f(x) is decreasing for all x < 6 f(x) is increasing for all x > 6 f(x) is decreasing for all x < 3 f(x) is increasing for all x < 3
The function f(x) is increasing for all x < 3. Then the correct option is A.
Given that:
Function, f(x) = (x + 6) / (x² - 9x + 18)
A function is an assertion, concept, or principle that establishes an association between two variables. Functions may be found throughout mathematics and are essential for the development of significant links.
Simplify the function, then we have
f(x) = (x + 6) / (x² - 9x + 18)
f(x) = (x + 6) / (x² - 6x - 3x + 18)
f(x) = (x + 6) / [x(x - 6) - 3(x - 6)]
f(x) = (x + 6) / (x - 6)(x - 3)
The graph is given below.
The function f(x) is increasing for all x < 3. Then the correct option is A.
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I need help I’ve been struggling
The first four terms of the sequence are 5, -4, 14, and -22.
We have,
The first term is given as a_1 = 5.
To find the next term, we use the formula:
a_n = -2a_(n-1) + 6.
Now,
a_2
= -2a_1 + 6
= -2(5) + 6
= -4
For the third term:
a_3 = -2a_2 + 6 = -2(-4) + 6 = 14
And for the fourth term:
a_4
= -2a_3 + 6
= -2(14) + 6
= -22
Thus,
The first four terms of the sequence are 5, -4, 14, and -22.
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a. Find the value of that maximizes the area of the figure.
(12-4x) ft
12 ft
b. Find the maximum area.
The maximum area is
(x + 2) ft
square feet.
Step-by-step explanation:
Area of trapezoid height x average of bases
area = (x+2) * ( 12-4x + 12)/2
= (x+2) (12-2x) = 12x -2x^2 +24 -4x
area = -2x^2 +8x+24 will be a maximum at x = - b/2a = -8/(2*-2) = 2
x=2
Max area = 32 ft^2
suppose a sample of 211 tankers is drawn. of these ships, 146 did not have spills. using the data, construct the 80% confidence interval for the population proportion of oil tankers that have spills each month. round your answers to three decimal places.
We can use the sample proportion of tankers without spills (146/211 = 0.692) to estimate the population proportion of tankers without spills. To construct the confidence interval, we need to find the margin of error and the critical value for an 80% confidence level.
Follow these steps:
1. Calculate the sample proportion:
In the sample of 211 tankers, 146 did not have spills, so 211 - 146 = 65 tankers had spills. The sample proportion (p-hat) is the number of tankers with spills divided by the total sample size:
p-hat = 65/211 ≈ 0.308
2. Determine the z-score for an 80% confidence interval:
Using a z-table or calculator, the z-score for an 80% confidence interval is approximately 1.282.
3. Calculate the standard error:
The standard error (SE) can be calculated using the formula: SE = sqrt(p-hat*(1-p-hat)/n)
SE = sqrt(0.308*(1-0.308)/211) ≈ 0.030
4. Construct the confidence interval:
Lower limit = p-hat - (z-score * SE)
Upper limit = p-hat + (z-score * SE)
Lower limit = 0.308 - (1.282 * 0.030) ≈ 0.277
Upper limit = 0.308 + (1.282 * 0.030) ≈ 0.339
So, the 80% confidence interval for the population proportion of oil tankers that have spills each month is approximately (0.277, 0.339), rounded to three decimal places.
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The population of a city is 10,000 people. A researcher wants to estimate how many people in the city own a car. The researcher surveys a random sample of 180 people own a car. • 60 people do not own a car. Based on the sample results, estimate the number of people in the city's population that own a car and the number that do not own a car. Complete the bar graph to show your estimates, rounded to the nearest 500 . Drag the top of each bar to the correct height.
Note that the graph that best shows the estimates of the survey rounded to the nearest 500 is Graph D. See the attached image.
How is this so?If we have a total of 10,000 people, and 240 people respond to a survey.
If 180 of them own cars and 60 don't, then the ratio of the respondent to the total population is:
Those that own car = (180/240) * 10,000
= 7,500 people
Those that don't own a car = (60/240) * 10,000
= 2,500 people
This is what is depicted in Graph D, hence option D is the correct answer.
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(Middle school work)
Regarding the cylindrical designs, it is recommended that Kevin choose the first design, which takes around 108.35 square inches of plastic. Kevin does not have enough plastic to build the second design since it needed around 431.97 square.
How did we arrive at this conclusion?
Here we used the surface area formula for cylinders.
Surface Area = 2πr² + 2πrh
R is the base and h is the height.
For First Design we have
Diameter (d) = 2r = 3
so r = 1.5
So Surface Area = 2π(1.5)² + 2π(1.5) (10)
SA First Cylinder = 108.35
Repeating the same step for the second cylinder we have:
SA 2ndCylinder = 431.97
Thus, the conclusion we have above is the correct one because:
108.35in² < 205in² > 431.97in²
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Quantitative Easing was used extensively in the aftermath of the(late 1990s/2000s) dot com crisisSelect one:TrueFalse
The given statement "Quantitative Easing was used extensively in the aftermath of the(the late 1990s/2000s) dot com crisis is false because Quantitative Easing was not used extensively in the aftermath of the dot com crisis in the late 1990s/2000s.
Quantitative easing (QE) was not used extensively in the aftermath of the dot-com crisis in the late 1990s and early 2000s. In fact, QE as a monetary policy tool gained prominence after the global financial crisis of 2008. The dot-com crisis primarily affected the technology sector, causing a stock market downturn, but it did not lead to a widespread financial crisis that would have necessitated the use of QE.
Therefore, the given statement is false.
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Problem 1. (10 points] Solve the differential equation 2y2 cos xdx + (4 + 4y sin x)dy = 0. =
Answer:
To solve the differential equation 2y^2 cos(x)dx + (4 + 4y sin(x))dy = 0, we can use the method of integrating factors.
First, we can rearrange the equation as:
2y^2 cos(x)dx = - (4 + 4y sin(x))dy
Dividing both sides by y^2(4 + 4sin(x)), we get:
-2cos(x)/y^2 dx + (1 + sin(x))/y dy = 0
Now we can identify the coefficients of dx and dy as -2cos(x)/y^2 and (1 + sin(x))/y, respectively.
To find the integrating factor, we can use the formula:
μ(x) = exp[∫P(x)dx]
where P(x) is the coefficient of dx. In this case, we have:
P(x) = -2cos(x)/y^2
So we need to integrate P(x) with respect to x:
∫P(x)dx = -2∫cos(x)/y^2 dx = 2sin(x)/y^2 + C
where C is an arbitrary constant.
Therefore, the integrating factor is:
μ(x) = exp[2sin(x)/y^2 + C]
Multiplying both sides of the differential equation by the integrating factor, we get:
-2cos(x) exp[2sin(x)/y^2 + C] dx/y^2 + (1 + sin(x)) exp[2sin(x)/y^2 + C] dy/y = 0
Now we can rewrite this equation as a total derivative:
d/dx [exp[2sin(x)/y^2 + C]/y] = 0
Integrating both sides with respect to x, we get:
exp[2sin(x)/y^2 + C]/y = D
where D is a constant of integration.
Solving for y, we get:
y = sqrt[2sin(x)/(D - exp[2sin(x)/y^2 + C])]
This is the general solution to the differential equation. The constant D and C can be determined from initial or boundary conditions, if given.
The general solution to the differential equation is:
-y^2 ln|4 + 4y sin(x)| = y + C
where C = C1 + C2.
To solve the differential equation 2y^2cos(x)dx + (4 + 4y sin(x))dy = 0, we first need to check whether it is a homogeneous equation or not. A homogeneous equation is one where all the terms have the same degree. In this case, we have a term with x and a term with y, so it is not homogeneous.
Next, we can check whether it is a separable equation or not. A separable equation is one where we can write it in the form f(x)dx = g(y)dy. We can rearrange the equation as:
2y^2cos(x)dx = - (4 + 4y sin(x))dy
Dividing both sides by (4 + 4y sin(x)) and rearranging, we get:
-2y^2cos(x) / (4 + 4y sin(x)) dx = dy
Now, we can integrate both sides with respect to their respective variables:
∫ -2y^2cos(x) / (4 + 4y sin(x)) dx = ∫ dy
To solve the integral on the left-hand side, we can use the substitution u = 4 + 4y sin(x), which gives du/dx = 4y cos(x) and du = 4y cos(x)dx. Substituting this into the integral, we get:
∫ -y^2 / u du = -y^2 ln|u| + C1
Substituting back u = 4 + 4y sin(x), we get:
∫ -y^2 / (4 + 4y sin(x)) du = -y^2 ln|4 + 4y sin(x)| + C1
Integrating the right-hand side with respect to y, we get:
∫ dy = y + C2
Therefore, the general solution to the differential equation is:
-y^2 ln|4 + 4y sin(x)| = y + C
where C = C1 + C2.
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Algebra Tina had $145. She spent $40 on fruit at the farmer's market. Solve the equation 40+ c = 145 to find the amount Tina has left