Answer:
x = -1.791 and x = 2.791
Step-by-step explanation:
Graphing x^2 - x - 2 = 3
we got 2 intersects at x = -1.791 and x = 2.791
Answer:
I dont know if this is the right answer hehe
A prize wheel at a carnival consists of five equal sectors of these colors: red, blue, green, yellow, and orange. If the wheel
lands on yellow, the player wins a prize. After observing several spins, a customer suspects that the wheel is not fair. To
substantiate this belief, the customer observes 100 consecutive spins of the prize wheel. Are the conditions for inference
met?
A. No, the random condition is not met.
B. No, the 10% condition is not met
C. No, the Large Counts condition is not met.
D. Yes, all of the conditions for inference are met.
(It’s D)
Answer:
The correct answer is D.
Step-by-step explanation:
D. Yes, all of the conditions for inference are met.
A spinner is spun twice with 4 equal sections colored red, orange, green, and blue. What is the P(spinning two Reds)?
1 over 2
1 over 4
1 over 8
1 over 16
The probability of the spinner landing on 2 reds is P ( 2 Reds ) = 1/8
Given data ,
To find the probability of spinning two reds, we need to calculate the probability of spinning a red on the first spin and then multiply it by the probability of spinning a red on the second spin.
The probability of spinning a red on the first spin is 1/4 since there is one red section out of four equal sections.
Now , the value of P ( R ) = 1/4
when the spinner is spun twice ,
P ( A ) = P ( R ) P ( R )
P ( A ) = 1/4 ( 1/4 )
On simplifying , we get
P ( A ) = 1/8
Hence , the probability is P ( A ) = 1/8.
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1. In this figure, the unshaded region represents a painting and the shaded region represents a frame around the painting. All angles are night angles 6 in. 10 in 9.5 in 13.5 in (a) What is the area of the painting? Show your work (b) What is the area of the frame? Show your work Answer:
The area of a shape is the amount of space on the shape
The area of the painting is 60 square inchesThe area of the frame is 60.25 square inchesHow to determine the area of the paintingFrom the question, the dimension of the painting is 6 inches by 10 inches
So, the area of the painting is:
Area = 6 * 10
Area = 60 square inches
Hence, the area of the painting is 60 square inches
How to determine the area of the frameFrom the question, the dimension of the picture is 9.5 inches by 13.5 inches
So, the area of the picture is:
Area = 9.5 * 13.5
Area = 128.25 square inches
The area of the frame is the difference between the area of the picture and the painting.
So, we have:
Frame = 128.25 - 60
Frame = 68.25
Hence, the area of the frame is 60.25 square inches
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As long as the slope of the objectivefunction stays between the slopes of the binding constraints...
A: the optimal corner point wont change
B: the value of the objective function wont change
C: there will be alternative optimal solutions
D: there will be no slack in the solution
The correct answer is option A: the optimal corner point won't change.
The optimal corner point is the point where the objective function reaches its maximum value, with the constraints of the problem being satisfied. If the slope of the objective function stays between the slopes of the binding constraints, it means that the current optimal corner point will remain unchanged.
This is because if the objective function's slope is within the slopes of the binding constraints, then the set of points where the objective function reaches its maximum value will be the same. Therefore, the optimal corner point will not change.
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what should the size of a sample be to have a margin of error of 4or a 95onfidence level from a population with a standard deviation of 35?
The sample size should be approximately 4704 to achieve a margin of error of 4 with a 95% confidence level from a population with a standard deviation of 35.
To achieve a margin of error of 4 with a 95% confidence level from a population with a standard deviation of 35, the sample size should be calculated using the formula for sample size determination in confidence intervals.
To determine the required sample size, we can use the formula:
n = \((Z \cdot \sigma / E)^2\)
where:
n = sample size
Z = Z-score corresponding to the desired confidence level (in this case, 95% confidence level)
σ = population standard deviation
E = margin of error
In this scenario, the margin of error (E) is 4, and the population standard deviation (σ) is 35.
We need to find the appropriate Z-score for a 95% confidence level.
The Z-score for a 95% confidence level is approximately 1.96.
Plugging in these values into the formula, we have:
n = \((1.96 \cdot 35 / 4)^2\)
Simplifying the equation, we get:
n = \((68.6)^2\)
n ≈ 4704
Therefore, the sample size should be approximately 4704 to achieve a margin of error of 4 with a 95% confidence level from a population with a standard deviation of 35.
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4/3/23 Business and
ontinue
K
Sept
Oct
Complete the table to determine the unpaid balances and the finance charges. The interest rate is 1.5% on the unpaid balance.
Month Unpaid Finance Purchases Returns Payments
Balance Charge during
Month
Beginning
of Month
$665.49
$38.45 $16.67
$321.54 $38.92
Question 3, 12.1.5
Part 1 of 5
The finance charge for September is
(Round to the nearest cent.)
$170
$175
Unpaid
Balance at
End of
Month
Answer:
$409.15
Step-by-step explanation:
The finance charge for September is $10.
Unpaid Balance at End of Month: $665.49 + $38.45 + $10.00 + $16.67 - $321.54 - $38.92 = $409.15.
what will increase the width of a confidence interval? a) increase number in sample b) decrease confidence level. c) decrease variance d) increase variance.
The width of a confidence interval decreases as the sample size increases and increases as the confidence level increases.
What is a confidence interval?A confidence interval is a range of estimates for an unknown parameter in frequentist statistics. A confidence interval is calculated at a certain confidence level; the 95% confidence level is the most commonly used, although other levels, such as 90% or 99%, are also employed.So, we know that smaller samples result in narrower intervals.
With a higher sample size, we can more precisely estimate a population proportion.Therefore, a confidence interval narrows as the sample size grows and widens as the level of confidence rises.
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The expected return on MSFT next year is 12% with a standard deviation of 20%. The expected return on AAPL next year is 24% with a standard deviation of 30%. If James makes equal investments in MSFT and AAPL, what is the expected return on his portfolio. 3. Siebling Manufacturing Company's common stock has a beta of .8. If the expected risk-free return is 2% and the market offers a premium of 8% over the risk-free rate, what is the expected return on Siebling's common stock
The expected return on James's portfolio is 18%.
The expected return on Siebling Manufacturing Company's common stock is 8.4%.
To calculate the expected return on James's portfolio, we need to take the weighted average of the expected returns of MSFT and AAPL based on their respective investments.
Let's assume James invests x% in MSFT and (100 - x)% in AAPL.
The expected return on James's portfolio can be calculated as:
Expected Return = (x * Expected Return of MSFT) + ((100 - x) * Expected Return of AAPL)
Substituting the given values:
Expected Return = (x * 12%) + ((100 - x) * 24%)
To find the value of x that makes James's investments equal, we set the weights equal:
x = 100 - x
Solving this equation gives us x = 50.
Now we can substitute this value back into the expected return equation:
Expected Return = (50% * 12%) + (50% * 24%)
Expected Return = 6% + 12%
Expected Return = 18%
Therefore, the expected return on James's portfolio is 18%.
To calculate the expected return on Siebling Manufacturing Company's common stock, we can use the Capital Asset Pricing Model (CAPM).
The CAPM formula is:
Expected Return = Risk-Free Rate + Beta * Market Premium
Risk-Free Rate = 2%
Market Premium = 8%
Beta = 0.8
Expected Return = 2% + 0.8 * 8%
Expected Return = 2% + 6.4%
Expected Return = 8.4%
Therefore, the expected return on Siebling Manufacturing Company's common stock is 8.4%.
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the mean salary of professional baseball players is $2.46 million with a standard deviation of 0.32. a new player is hired with a salary of $2.65 million. what is the z-score of this salary?
The z-score for the new player's salary is 0.59375
The z-score is a measure of how many standard deviations a value is from the mean. To find the z-score for a salary of $2.65 million, we can use the following formula:
z = (x - μ) / σ
where:
x = the salary of the new player ($2.65 million)
μ = the mean salary of professional baseball players ($2.46 million)
σ = the standard deviation of the salary ($0.32 million)
Plugging in the values, we get:
z = ($2.65 million - $2.46 million) / $0.32 million
z = ($0.19 million) / $0.32 million
z = 0.59375
Therefore, the z-score for the new player's salary is 0.59375. This means that the new player's salary is 0.59375 standard deviations above the mean salary of professional baseball players.
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For a standard normal random variable, what z-score has: __________
a) The z-score corresponding to the probability of 0.2000 to the right is z = 0.84.
b) The z-score corresponding to the probability of 0.9000 to the left is z = -1.28.
a) To find the z-score corresponding to a probability of 0.2000 to the right, we need to use the fact that the area under the standard normal distribution to the right of z is equal to 1 minus the area to the left of z.
In other words, we need to find the z-value such that the area to the left of it is equal to 1 - 0.2000 = 0.8000. Consulting a standard normal distribution table or using a calculator, we find that this z-value is approximately 0.84. Therefore, the answer is z = 0.84.
b) Similarly, to find the z-score corresponding to a probability of 0.9000 to the left, we need to find the z-value such that the area to the left of it is equal to 0.9000. Consulting a standard normal distribution table or using a calculator, we find that this z-value is approximately 1.28. Therefore, the answer is z = -1.28.
In both cases, we used the fact that the standard normal distribution has a mean of 0 and a standard deviation of 1, and we transformed the probability into an area under the curve.
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Complete question is:
For a standard normal random variable, what z-score has:
a) probability 0.2000 to the right? z = _____
b) probability 0.9000 to the left? z = _________
Find the value of y.
Answer:
Y represents an employee’s annual salary, measured in thousands of dollars. X1 represents an employee’s number of years of job experience. A value of 0 represents someone who has no job experience (such as a recent college graduate). X2 represents the number of years of graduate education.
Step-by-step explanation:
I do not have that.
Which of the following distributions has a mean that varies? I. The population distribution II. The distribution of sample data III. The sampling distribution of the sample mean
O ll only
O IIl only
O I only
O all three distributions
O II and III
The following distributions has a mean that varies
II. The distribution of sample data
III. The sampling distribution of the sample mean
The correct answer is option v) II and III."
Here, we have,
In the context of statistical distributions:
I. The population distribution refers to the distribution of a specific variable within the entire population. The mean of the population distribution which is fixed and does not vary.
II. The distribution of sample data refers to the distribution of a variable within a specific sample. The mean of the sample data can vary from one sample to another.
III. The sampling distribution of the sample mean refers to the distribution of sample means taken from multiple samples of the same size from a population. The mean of the sampling distribution of the sample mean is equal to the population mean, but the individual sample means can vary from sample to sample.
Therefore, the mean varies in both the distribution of sample data (II) and the sampling distribution of the sample mean (III), but not in the population distribution (I).
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In Milgram's first study of obedience, the majority of teachers initially complied but refused to deliver more than slight levels of shock.
In Milgram's first study of obedience, participants were assigned the role of 'teacher' and were instructed to administer electric shocks to a 'learner' whenever they answered a question incorrectly. The shocks ranged from mild to severe, with the highest level labeled as 'XXX.' The learner was actually an actor, and no real shocks were administered.
The study found that the majority of teachers initially complied with the experimenter's orders and delivered shocks, but they refused to deliver more than slight levels of shock. This suggests that while they were willing to follow the instructions to some extent, they had moral reservations about causing significant harm to another person.
It is important to note that the study has been criticized for ethical concerns and the potential psychological harm it may have caused to participants. However, it remains a significant contribution to our understanding of obedience and the power of authority figures.
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Find the value of x.
106°
43°
X°
X =
Answer:
Maybe the figure of this question is a triangle.
If so...the answer comes something like this....
Hope it helps! :)
Which division expression is equivalent to 4 and one-third divided by Negative StartFraction 5 over 6 EndFraction?
Answer:
(A) 13/3 / -5/6
Step-by-step explanation:
the answer is 13 over 3 divided by negative 5 over 6
i know this because i just took the quiz. ; )
i hope this helps <3
Answer:
its A
Step-by-step explanation:
I took the quiz
(z-score) A standardized test designed to measure math anxiety has a mean of 100 and a standard deviation of 10 in the population of first year college students. Which of the following observations would you suspect is an outlier? a) 150 b) 100 c) 90 d) all of the above e) none of the above
Show the calculation.
Answer:
Step-by-step explanation:
To determine if an observation is an outlier, we need to compute its z-score and see how far it deviates from the mean in terms of standard deviations.
The formula for z-score is:
z = (x - μ) / σ
where x is the observation, μ is the mean, and σ is the standard deviation.
For option (a), the observation is 150, so the z-score is:
z = (150 - 100) / 10 = 5
For option (b), the observation is 100, so the z-score is:
z = (100 - 100) / 10 = 0
For option (c), the observation is 90, so the z-score is:
z = (90 - 100) / 10 = -1
An observation is considered an outlier if its z-score is greater than 3 or less than -3.
Therefore, the only observation that might be an outlier is option (a) with a z-score of 5. The other two options have z-scores within the range of -3 to 3 and are not considered outliers.
So the answer is (a) 150.
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Can someone please help me with this my teacher didn’t show me how to do this
Answer:
The distance on the y-axis (not sure if thats how you say it :| ) is 8, and the distance between the x-axis (again not sure thats the correct term) is 6
im not a genius, but I hope this helps :D
(there is a gragh with the points)
Jordan scored 19 points during a basketball game. She made a total of 9 baskets.
If Jordan made only one-point free throws and three-point baskets, how many of each did she make?
A
1 one-point basket; 6 three-point baskets
B
4 one-point baskets; 5 three-point baskets
C
5 one-point baskets; 4 three-point baskets
D
6 one-point baskets; 3 three-point baskets
Answer:
B) 4 one-point baskets: 5 three-point baskets
Step-by-step explanation:
(4 x 1) + (5 x 3) = 19
Answer:
B
Step-by-step explanation:
5x3=15
4x1=4
15+4=19
PLUS a total of 9 baskets.
Therefore, your answer is B
need explanation and steps
The length of the line segment AC and AG will be 6√2 units and 6√3 units, respectively.
What is a Pythagoras theorem?The Pythagoras theorem states that the sum of two squares equals the squared of the longest side.
The Pythagoras theorem formula is given as
H² = P² + B²
AB = 6
BC = 6
CG = 6
Then the length of diagonal AC is given as,
AC² = AB² + BC²
AC² = 6² + 6²
AC = 6√2
Then the length of diagonal AG is given as,
AG² = AC² + CG²
AG² = (6√2)² + 6²
AG = 6√3
The length of the line segment AC and AG will be 6√2 units and 6√3 units, respectively.
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Which equation can be used to find 40 percent of 25? StartFraction 25 divided by 1 Over 40 divided by 1 EndFraction = StartFraction 25 Over 40 EndFraction StartFraction 100 times 4 Over 40 times 4 EndFraction = StartFraction 400 Over 16 EndFraction StartFraction 40 times 4 Over 25 times 4 EndFraction = StartFraction 160 Over 100 EndFraction StartFraction 40 divided by 4 Over 100 divided by 4 EndFraction = StartFraction 10 Over 25 EndFraction
Answer:
d
Step-by-step explanation:
Answer:
I think it's D
Step-by-step explanation:
Sorry if im wrong.
A stack of books is 56 inches high. How high is it in feet and inches?
1 foot = 12 inches
56 inches / 12 inches = 4.66 feet = 4 feet and 8 inches
Answer:
4 feet and 8 inches
Step-by-step explanation:
To convert a high number of inches to feet you divide it by 12 since 12 inches makes 1 foot.
So 56÷12 = 4 reminder 8
The remainder we keep it as inches
So our answer is 4 feet and 8 inches.
Which statement best describes the function represented by the graph?
A) The function is decreasing on the interval (-∝,0) and increasing on the interval (0,∝). B) The function is decreasing on the interval (∝,∝)
C) The function is increasing on the interval (∝, ∝).
D) The function is increasing on the interval (∝,0) and decreasing on the interval (0, ∝).
A statement which best describes the function represented by the graph include the following: B) The function is decreasing on the interval (-∞, ∞).
What is a decreasing function?For any given function, y = f(x), if the output value (range or y-value) is decreasing when the input value (domain or x-value) is increased, then, the function is generally referred to as a decreasing function.
On the other hand (conversely), if the output value (range or y-value) is increasing when the input value (domain or x-value) is increased, then, the function is generally referred to as an increasing function.
By critically observing the graph above, we can reasonably infer and logically deduce that this function is decreasing over the interval -∞ < x < ∞, from left to right.
In conclusion, the output values (range or y-values) of this function are decreasing from left to right i.e as we move towards the right.
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Evaluate: Question(2): Z+8-6(z-2a)+5z
Answer:
Z+12a−z+8+12−+8
Step-by-step explanation:
Z+8−6(z−2a)+5z
+8−6(−2)+5
Z+8−6(−2a+z)+5z
+8−6(−2+)+5
Z+8−6(−2a+z)+5z
+8−6(−2+)+5
Z+8+12a−z+8+12−
Answer:
Z + 8 + 12a − z
12a + 8
Step-by-step explanation:
Suppose the profit from the sale of x units of a product is P=6400x−18x^2−400. (a) What levei(s) of production will yield a profit of $359,400 ? (Enter your answers as a comma-separated list. Round your answers to two decimal places.) (b) Can a profit of more than $359,400 be made?
(a)The levels of production that will yield a profit of $359,400 are approximately 292.36 and 651.64 units. (b)So, it is possible to make a profit of more than $359,400.
(a) To determine the level(s) of production that will yield a profit of $359,400, substitute P=359400 in the equation.6400x−18x^2−400 = 359400Adding 400 to both sides:6400x − 18x² = 359800
Dividing both sides by -2:9x² − 3200x + 179700 = 0
Applying the quadratic formula:
x = (-(-3200) ± √((-3200)² - 4(9)(179700))))/(2(9))
= (3200 ± √(10240000 - 6464400))/18
= (3200 ± √(3785600))/18
= (3200 ± 1946.55)/18x
= 292.36 or 651.64
Thus, the levels of production that will yield a profit of $359,400 are approximately 292.36 and 651.64 units.
(b) To determine if a profit of more than $359,400 can be made, we need to determine the maximum profit by completing the square, and comparing it to $359,400.P=6400x−18x^2−400
Completing the square: P= -18(x - 88.89)² + 710937.2
Maximum profit is $710,937.20, which is more than $359,400.
So, it is possible to make a profit of more than $359,400.
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Which expression is equivalent to (q Superscript 6 Baseline) squared?
q cubed
q Superscript 8
q Superscript 12
q Superscript 36
Raising q to the power of 6 and then squaring it is the same as raising q to the power of 12. Option C.
The expression \((q^6)^2\) can be simplified using the power of a power property, which states that when you raise an exponentiated quantity to another exponent, you multiply the exponents. Applying this property, we have \((q^6)^2 = q^(6*2) = q^{12.\)
Therefore, the expression \((q^6)^2\) is equivalent to \(q^{12.\)
To understand this, let's break it down step by step:
Start with \(q^6\): This means q raised to the power of 6.
Square \(q^6\): We multiply the exponent 6 by 2, giving us 12.
The result is \(q^{12\): This means q raised to the power of 12.
Hence, \((q^6)^2\) simplifies to \(q^{12.\)
In summary, the expression \((q^6)^2\) is equivalent to \(q^{12\). So Option C is correct.
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the value of( log 32 base 4 + log 243 base 9)
.
.
.
.
pls answer fast
Answer:
4/5
Step-by-step explanation:
if log 32 base 4 = x, then 32^x = 4 -> x = 2/5
if log 243 base 9 = y, then 243^y=9 -> y = 2/5
therefore, the answer is 2/5+2/5=4/5
(Best Answer gets BrainLiest)
Find the missing value in the table.
The missing value is [??]
Answer:
20
Step-by-step explanation:
You can find this answer multiple ways.
One way is that each y value increases by 5 so following the pattern of 5, 10, 15 the next one would be 20.
Another way is that the the x value is 3 times the y value so we would just have to divide 60 by 3 to get 20.
Answer: 20
Step-by-step explanation:
y is a result of dividing x by 3
15/3 = 5
30/3 = 10
...
60/3 = 20
What is the equation of the line that passes through the point (−8,4) and has a slope of −1?
Answer:
y = -1x - 4
Step-by-step explanation:
Equation of a line in slope intercept form is
y = mx + b where m = slope and b = y-intercept
Slope is given as -1
So y = -1x + b
Substitute for point x = -8, y = 4
4 = (-1)(-8) + b
4 = 8 + b
Subtract 8 both sides:
4 - 8 = b
b = -4
So equation of line is y = -1x - 4
Consider the following data for a dependent variable y and two independent variables, x1 and x2 ; for these data SST = 15,128.4, and SSR = 14,141.7.
x 1 x 2 y
29 13 95
46 10 109
24 18 112
51 16 179
41 5 94
51 19 176
75 8 170
36 13 118
59 13 142
76 16 211
Round your answers to three decimal places.
a. Compute R2 .
b. Compute Ra 2 .
c. Does the estimated regression equation explain a large amount of the variability in the data?
SelectYesNoItem 3
Based on the equation in the question , the R2 would be 0.934.
To compute R2, we need to use the formula:
R2 = SSR / SST
Given that SSR = 14,141.7 and
SST = 15,128.4,
We can substitute these values into the formula:
R2 = 14,141.7 / 15,128.4
R2 ≈ 0.934
b. To compute Ra2, we need to subtract R2 from 1:
Ra2 = 1 - R2
Substituting the value of R2 we calculated in part a:
Ra2 ≈ 1 - 0.934
Ra2 ≈ 0.066
c. A large R2 value indicates that the estimated regression equation explains a large amount of the variability in the data.
In this case, R2 is approximately 0.934, which means that the estimated regression equation explains about 93.4% of the variability in the data.
So, the answer is "Yes".
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Select the correct answer.
Which function is represented by this graph?
A.
f(x) = |x + 7| − 3
B.
f(x) = |x − 7| − 3
C.
f(x) = |x + 3| − 7
D.
f(x) = |x − 3| − 7
Answer:
answer D
Step-by-step explanation:
Answer:
f(x) = |x − 7| − 3
Step-by-step explanation:
which of the following is not a type of angle
a acute
b obtuse
c parallel
d right
Answer:
parallel
Step-by-step explanation:
parallel describes lines
the answer is C
Step-by-step explanation:
parallel is not a type of angle