Given z-score is z = 2.58 and the null hypothesis isH0: p = 0.85, where p is the true proportion, and we need to find the p-value.
We know that for a two-tailed test, the p-value is the probability that a z-score is greater than or equal to the absolute value of the calculated z-score or less than or equal to its negative value. So, the p-value for a two-tailed test is: p-value = P(z ≥ 2.58) + P(z ≤ -2.58) ..............(1) Here, z = 2.58 represents the upper critical value, and the negative of it is the lower critical value (z = -2.58)
As the given hypothesis is a two-tailed test, we need to calculate the probabilities for both critical values. From the standard normal distribution table, the probabilities for these critical values are:
P(z ≥ 2.58) = 0.0049 (approx.) P(z ≤ -2.58) = 0.0049 (approx.)
Substituting these values in equation (1), we get: p- value = 0.0049 + 0.0049 p-value = 0.0098Hence, the p-value is 0.0098 (approx.)
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Answer fast pleasee
Richard and Teo have a combined age of 48. Richard is 15 years older than twice Teo's age. How old are Richard and Teo?
Richard is 35 years old and Teo is 10 years old.
What is the linear function?
The difference between starting and final numbers is the percentage drop. It displays a percentage loss of value compared to the original regardless of the units. The difference between the initial and final amounts is the amount of decline.
We have,
Richard and Teo have a combined age of 48.
Richard is 15 years older than twice Teo's age.
Let the ages of Richard and Teo be R and T years old respectively.
R +T= 48 -----(1)
R= 2T + 15 -----(2)
Substitute (2) into (1):
2T +15 +T= 48
3T +15= 48
3T= 48 -15
3T= 33
T= 33 ÷ 3
T= 10.1
Substitute T= 10.1 into (2):
R= 2(10.1) +15
R= 20.2 +15
R= 35.2
R = 35
Hence, Richard is 35 years old and Teo is 10 years old.
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Give and example of an irrational number and explain how you know it is irrational.
Answer:
sqrt(2) it cannot be expressed as a fraction and is not repeating
Step-by-step explanation:
Answer:
Pi is irrational.Step-by-step explanation:
3.14...
The "..." symbol indicates that a number is 100% irrational.
Hope it helps! ✶ ✶✶
Find the value of 2.8 + 6.5
Answer:
Step-by-step explanation:
2.8 + 6.5 = 9.3
Answer:
9.3
Step-by-step explanation:
2.8+6.5=9.3
You'd use addition to solve this
What is 1,035 divided by 38
Answer:
27.2368421053
Step-by-step explanation:
Which of the following shows the graph of Y = 2 In x?
Please I need the answer
Hope this helps~! Brainliest is 'preciated if it does!
The formula 2y = 3x + 6 is used in chemistry. How can this formula be solved for Y?
\(2y = 3x + 6\\y = \frac{3}{2}x + \frac{6}{2} = \frac{3}{2}x + 3\)
Answer the two questions in the photo for easy points ( will mark brainliest if correct )
[10] D
A counter-example is an example that shows the argument can have true premises and a false conclusion.
Option D shows someone who is good at math, but isn't an engineer. This is a counter-example.
[11] B
Similar to the previous question, options A, B, and D are all dogs. However, option C is not a dog and also has four legs. Therefore, it is a counter-example.
*20 points* 7x + 24 = 2x - 6 How many solutions?
Answer:
x= -6
Step-by-step explanation:
so i'm thinking 1 solution.
(let me know if i'm wrong)
Answer:
infinitely many solutions.
Step-by-step explanation:
If solving an equation yields a statement that is true for a single value for the variable, like x = 3, then the equation has one solution. If solving an equation yields a statement that is always true, like 3 = 3, then the equation has
Which derived character is placed immediately after that group on the cladogram?
Answer:
Step-by-step explanation:
One that has the next least in common with the rest.
a demand curve is given by p = 430/(x 9). find the consumer surplus when the selling price p is $10. (round your answer to the nearest cent.)
When the selling price is $10, the consumer surplus is approximately $0.00 (rounded to the nearest cent).
The consumer surplus when the selling price is $10 is found by,
1. First, identify the demand curve equation: p = 430/(x+9).
2. Next, find the quantity demanded (x) when the selling price (p) is $10. Plug p = 10 into the demand curve equation: 10 = 430/(x+9).
3. Solve for x: 10(x+9) = 430. This simplifies to 10x + 90 = 430. Subtract 90 from both sides: 10x = 340. Divide by 10: x = 34.
4. Now, find the price consumers are willing to pay for the 34th unit using the demand curve equation: p = 430/(34+9). This simplifies to p = 430/43, which equals p ≈ 10.
5. The consumer surplus is the difference between the price consumers are willing to pay for the 34th unit and the selling price, multiplied by the quantity demanded, and divided by 2 (since the surplus forms a triangle). In this case, the consumer surplus is approximately (10 - 10) * 34 / 2 = 0.
When the selling price is $10, the consumer surplus is approximately $0.00 (rounded to the nearest cent).
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what is 3/10 of 365=
PLEASE HELP ME
Answer:
109.5 i hope this helps tell me if its right
Some one help if you can please
Answer:
x= 131
Step-by-step explanation:
PLZ MARK AS BRAINLIEST
Answer:
131°
Step-by-step explanation:
All angles in a triangle add up to 180°
180 - (39 + 92) = 49
A straight angle is 180°
180 - 49 = 131
Problem 6 (16 points). An individual opens a savings account with an initial investment of $500. The bank offers her an annual interest rate of 9%, which is continuously computed. She decides to deposit $200 every month. a) Write an initial value problem that models this investment over time. b) Solve the IVP.
c) What is the value of the investment in 2 years? d) After the 2 year mark, she increases her monthly investment to $300. What is the value of the investment a year later? Show all your work for full credit; you may use a calculator for this problem. Problem 7 (16 points). Solve the following IVP: ycosx−2xe y coz x − 2x eʸ -6x² - (x² eʸ - sin x - 4) yᶦ = 0; y (π) = 0
The investment problem is modeled by an initial value problem (IVP) where the rate of change of the investment is determined by the initial investment, monthly deposits, and the interest rate.
a) The investment problem can be modeled by an initial value problem where the rate of change of the investment, y(t), is given by the initial investment, monthly deposits, and the interest rate. The IVP can be written as:
dy/dt = 0.09y + 200, y(0) = 500.
b) To solve the IVP, we can use an integrating factor to rewrite the equation in the form dy/dt + P(t)y = Q(t), where P(t) = 0.09 and Q(t) = 200. Solving this linear first-order differential equation, we obtain the solution for y(t).
c) To find the value of the investment after 2 years, we substitute t = 2 into the obtained solution for y(t) and calculate the corresponding value.
d) After 2 years, the monthly deposit increases to $300. To find the value of the investment a year later, we substitute t = 3 into the solution and calculate the value accordingly.
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4. The dot plots show how much time, in minutes, students in a class took to complete
each of five different tasks. Select all the dot plots of tasks for which the mean time is
approximately equal to the median time.
A
19
A+
05 10 15 20 25 30 35 40 45 50 55 60
*******
++
++
5 10 15 20 25 30 35 40 45 50 55 60
cos
.
*********
"
****
10 15 20 25 30 35 40 45 50 55 60
*******
.
***H
D
0 5 10 15 20 25 30 35 40 45 50 55 60
.
E ++
0 5 10 15 20 25 30 35 40 45 50 55 60
Main Answer: The dot plots for tasks A+ and D show the mean time is approximately equal to the median time.
Supporting Question and Answer:
How do we determine if the mean time is approximately equal to the median time based on a dot plot?
To determine if the mean time is approximately equal to the median time based on a dot plot, we need to look at the distribution of the data and see if it is symmetric or skewed. If the data is roughly symmetric, with values distributed evenly on both sides of the median, then the mean and median will be close to each other, and the mean time will be approximately equal to the median time. Conversely, if the data is skewed, with more values on one side of the median than the other, then the mean and median will be further apart, and the mean time will not be approximately equal to the median time.
Body of the Solution:The dot plots of tasks for which the mean time is approximately equal to the median time are:
Dot plot A+: The median is around 25 minutes, and the mean is also around 25 minutes.
Dot plot D: The median is around 20 minutes, and the mean is slightly above 20 minutes.
Therefore, dot plots A+ and D have approximately equal mean and median times.
Final Answer:Thus, dot plots A+ and D have approximately equal mean and median times.
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The dot plots for tasks A+ and D show the mean time is approximately equal to the median time.
To determine if the mean time is approximately equal to the median time based on a dot plot, we need to look at the distribution of the data and see if it is symmetric or skewed. If the data is roughly symmetric, with values distributed evenly on both sides of the median, then the mean and median will be close to each other, and the mean time will be approximately equal to the median time. Conversely, if the data is skewed, with more values on one side of the median than the other, then the mean and median will be further apart, and the mean time will not be approximately equal to the median time.
Body of the Solution: The dot plots of tasks for which the mean time is approximately equal to the median time are:
Dot plot A+: The median is around 25 minutes, and the mean is also around 25 minutes.
Dot plot D: The median is around 20 minutes, and the mean is slightly above 20 minutes.
Therefore, dot plots A+ and D have approximately equal mean and median times.
Thus, dot plots A+ and D have approximately equal mean and median times.
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mLON is a straight angle.
mMON = 8x - 13
mLOM = 7x – 17°
Find MON
Answer:MON=99
Step-by-step explanation:
8x-13+7x-17=180
15x=210
x=14
Answer:
Step-by-step explanation:
8x - 13 + 7x - 17 =180
15x - 30 = 180
15x = 210
x = 14
8(14) - 13= 112 - 13 = 99
Which proportion can you use to find the value of a?
The proportion used to find the value of a is a/18 = 16/a
What is proportion?Proportion is a mathematical comparison between two numbers. According to proportion, if two sets of given numbers are increasing or decreasing in the same ratio, then the ratios are said to be directly proportional to each other.
Given are three similar triangles, (refer to attached figure to separately see the similar triangles)
We know that, similar triangle have corresponding sides in equal ratio,
Therefore,
a/18 = 16/a
Hence, the proportion used to find the value of a is a/18 = 16/a
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Recall how to find the the number of standard deviations away from the mean a particular value fell from using the normal probability plot. now we use the body in order to determine the z-score.
It is not entirely clear what is meant by "using the body" to determine the z-score. However, I will explain how to find the z-score from a normal probability plot.
A normal probability plot is a graphical tool used to check if a given data set follows a normal distribution. In this plot, the data is plotted against a theoretical normal distribution. If the data points fall approximately along a straight line, then the data can be considered normally distributed. To find the z-score of a particular value from a normal probability plot, we need to first determine the standardized normal variable, which is the number of standard deviations away from the mean that the value falls. We can estimate this by finding the percentile of the value on the vertical axis of the plot, and then using the standard normal distribution table to find the corresponding z-score. For example, suppose a data set has a mean of 50 and a standard deviation of 10. We have a value of 65 that we want to find the z-score for using the normal probability plot. If the vertical axis of the plot indicates that the 65th percentile falls at a standardized normal variable of approximately 1.28, we can look up this value in the standard normal distribution table to find that the corresponding z-score is approximately 1.28 x 10 + 50 = 63.8. Therefore, we can use the normal probability plot to estimate the z-score of a particular value by finding its percentile on the plot and using the standard normal distribution table to find the corresponding z-score.
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Expand to write an equivalent expression: -12(-2x+4y)
Factor to write an equivalent expression: 26a−10
26x - 52y is the equivalent expression.
2(13a - 5) is the equivalent expression.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
-13 (-2x + 4y)
= -13 x -2x+ -13 x 4y
= 26x - 52y
Now,
26a - 10
Taking out a common factor.
= 2 (13a - 5)
Thus,
26x - 52y and 2(13a - 5) are the equivalent expression.
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n/4+1=5 nnnnnnnnfegorogrohtohteohteoeoioeitleigeoeohohrhoagororohroooh
Show all your work! Thank you!
Answer:
a
Step-by-step explanation:
1+1=2 2+2=4 meaning its 9$ for the cheesecake and 10 for the apple pie
Solve.a. Hillary can do a certain puzzle in 5 hours. Bill can do the same puzzle in 7 hours. How longwill it take them if they work together?b. A motor boat goes 10 miles against the current in a river in the same time that it goes 15miles with the current. If the rate of the current is 3 mph, find the rate of the boat in stillwater.
So, it takes Hillary and Bill approximately 4.35 hours to complete 1 puzzle together and the speed of the boat in still water is approximately 12 mph.
a. Let's call the time it takes for Hillary and Bill to complete the puzzle together "t." We know that in 5 hours, Hillary can do 1 puzzle, so her rate is 1/5 puzzles per hour. Bill can do 1 puzzle in 7 hours, so his rate is 1/7 puzzles per hour. When they work together, their combined rate is (1/5 + 1/7) puzzles per hour. To find the time it takes them to complete 1 puzzle together, we set up an equation: t = 1 / (1/5 + 1/7). Solving for t, we find that it takes them approximately 4.35 hours to complete 1 puzzle together.
b. Let's call the speed of the boat in still water "s." When the boat is going against the current, its speed is s - 3 mph, and when it is going with the current, its speed is s + 3 mph. We know that it takes the same amount of time for the boat to go 10 miles against the current and 15 miles with the current, so we can set up an equation: 10 / (s - 3) = 15 / (s + 3). Solving for s, we find that the speed of the boat in still water is approximately 12 mph.
Therefore, it takes Hillary and Bill approximately 4.35 hours to complete 1 puzzle together and the speed of the boat in still water is approximately 12 mph.
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Hello can someone help please :)
\(▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)
The values of x for which f(x) = 8 are :
x = 6x = -6A simple impact crater on the moon has a diameter of 15
A 15-kilometer diameter impact crater is a relatively small feature on the Moon's surface. It was likely formed by a small asteroid or meteoroid impact, creating a circular depression.
Impact craters on the Moon are formed when a celestial object, such as an asteroid or meteoroid, collides with its surface. The size and characteristics of a crater depend on various factors, including the size and speed of the impacting object, as well as the geological properties of the Moon's surface. In the case of a 15-kilometer diameter crater, it is considered relatively small compared to larger lunar craters.
When the impacting object strikes the Moon's surface, it releases an immense amount of energy, causing an explosion-like effect. The energy vaporizes the object and excavates a circular depression in the Moon's crust. The crater rim, which rises around the depression, is formed by the ejected material and the displaced lunar surface. Over time, erosion processes and subsequent impacts may alter the appearance of the crater.
The study of impact craters provides valuable insights into the Moon's geological history and the frequency of impacts in the lunar environment. The size and distribution of craters help scientists understand the age of different lunar surfaces and the intensity of impact events throughout the Moon's history. By analyzing smaller craters like this 15-kilometer diameter one, researchers can further unravel the fascinating story of the Moon's formation and its ongoing relationship with space debris.
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A right rectangular prism has a length of 2 1/2 feet, a width of 3 feet, and a height of 1 1/2
feet. Unit cubes with side lengths of 1/2 foot are added to completely fill the prism with no space remaining. What is the volume, in cubic feet, of the right rectangular prism?
Answer: 11.25 ft³
Step-by-step explanation:
We can use the volume formula to solve. I will turn the halves into 0.5 for calculation purposes.
V = L * W * H
V = 2.5 * 3 * 1.5
V = 11.25 ft³
The volume of the rectangular prism is 11.25 ft³.
A tennis match requires that a player win three of five sets to win the match. If a player wins the first two sets, what is the probability that the player wins the match, assuming that each player is equally likely to win each set
Using it's concept, it is found that there is a 0.875 = 87.5% probability that the player wins the match.
What is a probability?A probability is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, these following outcomes result in the player winning the match:
Wins the third set, with 0.5 probability.Loses the third set but wins the fourth, each with 0.5 probability.Loses the third and fourth sets but wins the fifth, each with 0.5 probability.Hence, the probability that he wins the match is given as follows:
p = 0.5 + 0.5² + 0.5³ = 0.875.
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(1 /a+ 1/b) (a+b-c)+(1/b+1/c) (b+c-a) + (1/c+1/a)(c+a-b)
plz solve this question
Answer:
(1 /a+ 1/b) (a+b-c)+(1/b+1/c) (b+c-a) + (1/c+1/a)(c+a-b)
plz solve this question
Step-by-step explanation:
3 is the ans
Problems 1-5: We want to know the true proportion of students that are ok with online courses. We take a sample of 120 students, and 72 said they are ok with online courses. We want to create a 95% confidence interval. Answer the questions below:1) What is the point estimate for the population proportion?2) What is the standard error?3) What is the z score for 95% confidence?4) What is a 95% confidence interval for this data?5) What is the margin of error for this data?
Answer:
Step-by-step explanation:
ima a braintlest
PLEASE HELP QUICK
An artist is designing a kite like the one show below. Calculate the area to determine how much material she will need to create the kite.
1) 38 square inches
2) 66.5 square inches
3) 114 square inches
4) 180.5 square inches
Answer:
Area=180.5 sq in
Step-by-step explanation:
(7x9.5x.5x2)+(12x9.5x.5x2)=Area
66.5+114=Area
Area=180.5 sq in
Find the first and second derivatives of the function. (Factor your answer completely.)
g(u) = u(2u − 3)^3
g ' (u) = g'' (u) =
The first derivative of the function `g(u) = u(2u - 3)^3` is `g'(u) = 6u(2u - 3)^2 + (2u - 3)^3`. The second derivative of the function is `g''(u) = 12(u - 1)(2u - 3)^2`.
Given function: `g(u)
= u(2u - 3)^3`
To find the first derivative of the given function, we use the product rule of differentiation.`g(u)
= u(2u - 3)^3`
Differentiating both sides with respect to u, we get:
`g'(u)
= u * d/dx[(2u - 3)^3] + (2u - 3)^3 * d/dx[u]`
Using the chain rule of differentiation, we have:
`g'(u)
= u * 3(2u - 3)^2 * 2 + (2u - 3)^3 * 1`
Simplifying:
`g'(u)
= 6u(2u - 3)^2 + (2u - 3)^3`
To find the second derivative, we differentiate the obtained expression for
`g'(u)`:`g'(u)
= 6u(2u - 3)^2 + (2u - 3)^3`
Differentiating both sides with respect to u, we get:
`g''(u)
= d/dx[6u(2u - 3)^2] + d/dx[(2u - 3)^3]`
Using the product rule and chain rule of differentiation, we have:
`g''(u)
= 6[(2u - 3)^2] + 12u(2u - 3)(2) + 3[(2u - 3)^2]`
Simplifying:
`g''(u)
= 12(u - 1)(2u - 3)^2`.
The first derivative of the function `g(u)
= u(2u - 3)^3` is `g'(u)
= 6u(2u - 3)^2 + (2u - 3)^3`. The second derivative of the function is `g''(u)
= 12(u - 1)(2u - 3)^2`.
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The first derivative of g(u) is g'(u) = (2u - 3)³ + 6u(2u - 3)², and the second derivative is g''(u) = 12(2u - 3)² + 12u(2u - 3).
Using the product and chain ruleFirst, let's find the first derivative:
g'(u) = (2u - 3)³ * d(u)/du + u * d/dx[(2u - 3)³]
Using the chain rule, we can differentiate (2u - 3)³ and u as follows:
d(u)/du = 1
d/dx[(2u - 3)³] = 3(2u - 3)² * d(2u - 3)/du
= 3(2u - 3)² * 2
Plugging these values back into the equation for g'(u), we have:
g'(u) = (2u - 3)² + u * 3(2u - 3)² * 2
= (2u - 3)³ + 6u(2u - 3)²
Simplifying the expression, we have:
g'(u) = (2u - 3)³ + 6u(2u - 3)²
Now, let's find the second derivative:
g''(u) = d/dx[(2u - 3)³ + 6u(2u - 3)²]
Using the chain rule and product rule, we can differentiate each term:
d/dx[(2u - 3)³] = 3(2u - 3)² * d(2u - 3)/du
= 3(2u - 3)² * 2
d/dx[6u(2u - 3)²] = 6(2u - 3)² + 6u * d/dx[(2u - 3)²]
= 6(2u - 3)² + 6u * 2(2u - 3)
The Second derivativePlugging these values back into the equation for g''(u), we have:
g''(u) = 3(2u - 3)² * 2 + 6(2u - 3)² + 6u * 2(2u - 3)
= 6(2u - 3)² + 6(2u - 3)² + 12u(2u - 3)
= 12(2u - 3)² + 12u(2u - 3)
Simplifying the expression further, we have:
g''(u) = 12(2u - 3)² + 12u(2u - 3)
Therefore, the first derivative of g(u) is g'(u) = (2u - 3)³ + 6u(2u - 3)², and the second derivative is g''(u) = 12(2u - 3)² + 12u(2u - 3).
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what is the probability that a randomly selected gas station in russia charged more than the mean price in the united state
The probability that a randomly selected gas station in Russia charges more than the mean price in the United States is quite low.
This is because the prices of gas in Russia are typically much lower than the mean price of gas in the United States. The average cost of gasoline in Russia is around $0.50 per liter while in the United States, the average price of gas is around $1.78 per liter.
To explain further, the cost of living in Russia is lower than the cost of living in the United States. This means that there is more disposable income for people living in Russia and as a result, the price of gas is much lower than in the United States.
In addition, the cost of transportation and other production costs are lower in Russia than in the United States, which also keeps the prices of gas in Russia lower.
All of these factors make it unlikely that a randomly selected gas station in Russia would be charging more than the mean price in the United States.
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