Answer: A is true, B is False, C is False and D is True.
Step-by-step explanation:
A. True. This statement is true by definition of independent events.
B. False. The correct statement is: If events A and B are independent, then P(A ∩ B) = P(A) * P(B). This is the definition of independent events.
C. False. If events A and B are independent, then P(A ∩ B) = P(A) * P(B). Since neither P(A) nor P(B) is necessarily zero, it follows that P(A ∩ B) is also not necessarily zero.
D. True. If events A and B are independent, then P(B|A) = P(B) and by rearranging the conditional probability formula, we get P(B ∩ A) = P(B|A) * P(A) = P(B) * P(A). Similarly, we can also show that P(A|B) = P(A), which means that P(B|A) = P(B) = P(A|B).
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when the points on a unit hypersphere, we know the projection on any unit vectors has mean 0 and variance 1. then, is this condition sufficient to say that the original points are uniformly distributed on the unit hypersphere?
No, the condition of having a mean of 0 and variance of 1 for projections on any unit vector is not sufficient to say that the original points are uniformly distributed on the unit hypersphere.
This is because it only guarantees that the projections have a specific statistical distribution, but it doesn't provide information about the distribution of the original points in the hypersphere. In fact, there are many non-uniform distributions that satisfy this condition, such as Gaussian or Laplace distributions.
To determine if the original points are uniformly distributed on the unit hypersphere, additional information about their distribution is needed, such as their density function or probability measure. One common way to test for uniformity is to use statistical tests such as the Kolmogorov-Smirnov test or the Anderson-Darling test, which compare the observed distribution to the expected distribution under uniformity.
In summary, having a mean of 0 and variance of 1 for projections on any unit vector is a necessary but not sufficient condition for uniform distribution on the unit hypersphere, and additional information and testing is needed to confirm uniformity.
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Determine the Standard Deviation of a Variable from Raw Data Identify the given statement as either true or false. The standard deviation can be negative. (This is a reading assessment question Be certain of your answer because you only get one attempt on this question.) Choose the correct answer below False True
The given statement is false. The standard deviation is a measure of the spread of data from its mean value. It is always a positive value or zero, but it cannot be negative.
If the standard deviation is zero, it means that all the data values are the same, and there is no variability. However, if the standard deviation is small, it means that the data points are close to the mean value, while a large standard deviation indicates that the data points are widely spread out from the mean. Therefore, it is important to understand that the standard deviation cannot be negative and should always be interpreted as a positive value or zero.
The given statement is: "The standard deviation can be negative." To determine whether this statement is true or false, let's briefly review the concept of standard deviation.
Standard deviation is a measure of the dispersion or spread of a set of values in a dataset. It is calculated using the square root of the variance, which is the average of the squared differences from the mean.
Since variance involves squaring the differences, it will always be a positive value or zero. Consequently, when taking the square root of a positive value or zero, the result will never be negative.
Therefore, the correct answer to the statement "The standard deviation can be negative" is False. Standard deviation cannot be negative as it represents the dispersion of values in a dataset.
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An expression is given.
8x³ - 2x - 5x+7
Determine the BEST description of the given parts of the expression. Select each word ONLY ONCE for each part of the expression.
-5
82³
74
Term
O
O
O
Coefficient
O
O
O
©2023 Illuminate Education TM, Inc.
Constant.
O
8x³ is a term
-5 is a coefficient
+ 7 is a constant
What are algebraic expressions?
Algebraic expressions are defined as expressions that are made up of terms, variables, constants, factors and coefficients.
These algebraic expressions are also composed of arithmetic or mathematical operations.
These operations are;
AdditionDivisionBracketParenthesesSubtractionMultiplicationFrom the information given, we have that the algebraic expression is;
8x³ - 2x - 5x+7
We have that;
8x³ is a term
-2x is a term
-5 is a coefficient
+ 7 is a constant
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Using the notation of the previous problem, prove that for sets A, B, C, D ∈ P(X). AΔB = CΔD <---> AΔC = BΔD.
To prove that AΔB = CΔD if and only if AΔC = BΔD, we need to show two implications:
If AΔB = CΔD, then AΔC = BΔD
If AΔC = BΔD, then AΔB = CΔD
Let's start with implication 1:
Suppose AΔB = CΔD. This means that every element that is in A or B, but not both, is also in C or D, but not both. Similarly, every element that is in C or D, but not both, is also in A or B, but not both.
Now consider AΔC. This is the set of elements that are in A or C, but not both. We can split this set into two parts: (i) the elements that are in A but not in C, and (ii) the elements that are in C but not in A.
For part (i), we know that these elements are either in B or not in B, because if an element is in A but not in C, it must be in B (since B is the set of elements that are in A but not in AΔB). Similarly, for part (ii), we know that these elements are either in D or not in D.
Therefore, we can write AΔC = (A∩B')∪(C∩D').
Similarly, we can write BΔD = (B∩A')∪(D∩C').
Now, since AΔB = CΔD, we have that (A∩B')∪(C∩D') = (B∩A')∪(D∩C'). Rearranging this equation, we get (A∩C')∪(C∩A') = (B∩D')∪(D∩B'). This means that AΔC = BΔD, which proves implication 1.
Now let's move on to implication 2:
Suppose AΔC = BΔD. This means that every element that is in A or C, but not both, is also in B or D, but not both. Similarly, every element that is in B or D, but not both, is also in A or C, but not both.
Now consider AΔB. This is the set of elements that are in A or B, but not both. We can split this set into two parts: (i) the elements that are in A but not in B, and (ii) the elements that are in B but not in A.
For part (i), we know that these elements are either in C or not in C, because if an element is in A but not in B, it must be in C (since C is the set of elements that are in A but not in AΔC). Similarly, for part (ii), we know that these elements are either in D or not in D.
Therefore, we can write AΔB = (A∩C')∪(B∩D').
Similarly, we can write CΔD = (C∩A')∪(D∩B').
Now, since AΔC = BΔD, we have that (A∩C')∪(B∩D') = (C∩A')∪(D∩B'). Rearranging this equation, we get (A∩D')
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two circles that share the same center have radii $10$ meters and $20$ meters. an aardvark runs along the path shown, starting at $a$ and ending at $k$. the aardvark runs meters. what is
the aardvark runs $10\sqrt{3} + 30$ meters.Since the circles have the same center, we can connect points $B$ and $C$ to the center of the circles to form radii of length $10$ and $20$ meters.
We can also draw a line segment connecting points $A$ and $K$ to form a straight line that intersects the two radii at points $D$ and $E$, respectively.
Using the Pythagorean theorem, we can find the length of $DE$ as follows:
$DE = \sqrt{AE^2 - AD^2}$
where $AE = 20$ meters and $AD = 10$ meters. Thus,
$DE = \sqrt{20^2 - 10^2} = 10\sqrt{3}$ meters.
We know that the aardvark runs along the path from $A$ to $D$, along the radius of the smaller circle, then along the path from $D$ to $E$, along the segment connecting the two radii, and finally along the path from $E$ to $K$, along the radius of the larger circle. Therefore, the total distance the aardvark runs is:
$AD + DE + EK = 10 + 10\sqrt{3} + 20 = 10\sqrt{3} + 30$ meters.
Thus, the aardvark runs $10\sqrt{3} + 30$ meters.
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you have started your position as transportation director in a small town called mountainside village. there is only one road in and out of town. today you can expect at peak traffic to see 35 cars per hour and the drive along the road with no traffic is 1 minute. assuming poisson arrival and exponential drive times, what is the current utilization of the road?
From exponential distribution of drive time, the current utilization of the road, in small town and only one road in and out of town is equals to the 05833 or 58 33%.
If i started my position as transportation director in a small town called mountainside. To calculate the current utilization of the road, we have to use the formula, Utilization = Arrival rate x Drive time
Let's consider, Poisson arrival and exponential drive times, then
Arrival rate = λ = 35 cars per hour
Drive time = [tex]\frac{ q}{ μ} = \frac{ 1}{60 } hours [/tex] (since the drive time is 1 minute)
Therefore, from above formula of Utilization = 35 cars per hour x (0.0166 hours)
Utilization = 0.5833 or 58.33%
So, the current utilization value is 58.33%.
Thus, the current utilization of the road is
05833 or 58 33%
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i need the derivative of this please?!
The differentiation for the given function is f'(x)=[tex]12/x^2+8/x^5[/tex]
Power Rule of Differentiation states that if x is a variable raised to power n, then the derivative of x raised to the power n is represented by
[tex]\frac{d}{dx}x^n = n.x^n^-^1[/tex]
The given function is f(x) = [tex]-12/x-2/x^4[/tex]
Using the differentiation rule for the given function it can be written as
[tex]\frac{d}{dx}(-12/x-2/x^4) = -12(-1.x^-^1^-^1)-2(-4.x^-^4^-^1)[/tex]
f'(x)=[tex]12/x^2+8/x^5[/tex]
Hence, the answer is [tex]12/x^2+8/x^5[/tex]
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v=<8,3,5>
w=<2,2,2>
Find the cosine of the angle between v and w
If v=<8,3,5> w=<2,2,2>, the cosine of the angle between vectors v and w is approximately 0.93294.
To find the cosine of the angle between vectors v and w, we will use the formula:
cos(θ) = (v • w) / (||v|| ||w||)
where θ is the angle between the vectors, v • w is the dot product of v and w, and ||v|| and ||w|| are the magnitudes of v and w, respectively.
First, let's find the dot product (v • w):
v • w = (8 * 2) + (3 * 2) + (5 * 2) = 16 + 6 + 10 = 32
Next, let's find the magnitudes of v and w:
||v|| = √([tex]8^2 + 3^2 + 5^2[/tex]) = √(64 + 9 + 25) = √98
||w|| = √([tex]2^2 + 2^2 + 2^2[/tex]) = √(4 + 4 + 4) = √12
Now, let's find the cosine of the angle between v and w:
cos(θ) = (32) / (√98 * √12) = 32 / (9.899494936611665 * 3.4641016151377544) ≈ 0.93294
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The cosine of the angle between v and w is 0.9332
To find the cosine of the angle between v and w, we can use the formula:
cos(Ф) = (v.w) / (||v|| ||w||)
where Ф is the angle between v and w, the . represents the dot product, and || || represents the magnitude or length. First, let's calculate the dot product of v and w:
v.w = 8*2 + 3*2 + 5*2 = 32
Next, let's calculate the magnitudes of v and w:
||v|| = sqrt(8^2 + 3^2 + 5^2) = sqrt(98)
||w|| = sqrt(2^2 + 2^2 + 2^2) = sqrt(12)
Now we can substitute these values into the formula:
cos(Ф) = (v.w) / (||v|| ||w||)
cos(Ф) = 32 / (sqrt(98) * sqrt(12))
cos(Ф)= 32 / (sqrt(1176))
cos(Ф) = 32 / 34.29
cos(Ф)= 0.9332
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These lists provide information about two jobs. 2 lists provide information about 2 jobs. job a pays 35,000 dollars per year, has 10 paid days off per year, and has no benefits. job b pays 31,000 dollars per year, has 15 paid days off per year, and provides medical and dental insurance. which statement best compares the two jobs? job a has a lower salary than job b, but the benefits make job a a more attractive pay package. job b has a lower salary than job a, but the benefits make job b a more attractive pay package. job a has a higher salary than job b plus benefits that make job a a more attractive pay package. job b has a higher salary than job a plus benefits that make job b a more attractive pay package.
Job B has a lower salary than Job A, but the benefits make Job B a more attractive pay package.
When comparing the two jobs, it's important to consider not just the salary but also the benefits and paid time off. While Job A offers a higher salary than Job B, it doesn't come with any benefits. On the other hand, Job B has a lower salary but provides medical and dental insurance as well as more paid time off. Depending on the individual's priorities and circumstances, they may value either a higher salary or better benefits and work-life balance. Therefore, Job B could be considered more attractive to some people because of its benefits package, despite the lower salary.
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Indicate below whether the equation in the box is true or false?
Answer: False
Step-by-step explanation: :)
15. Express the repeating decimal 4.61 as an exact fraction using a geometric series with 0.01 being the repeating decimal.
Answer:
4 11/18------------------------
We have a repeating decimal 4.6(1).
Let's express it as a GP:
4.6(1) = 4.6 + 0.01 + 0.001 + 0.0001 + ...Fund the sum of infinite GP, with the first term of a = 0.01 and common ratio of r = 0.1:
S = a/(1 - r) S = 0.01/(1 - 0.1) = 0.01/0.9 = 1/90Add 4.6 to the sum:
4.6 + 1/90 =4 + 0.6 + 1/90 =4 + 6/10 + 1/90 = 4 + 54/90 + 1/90 = 4 + 55/90 = 4 + 11/184 11/18Hence the fraction is 4 11/18.
The notation p(zless than
a. The probability that a standard normal random variable is less than a b. The probability that a standard normal random variable is greater than a
c. The probability that a standard normal random variable is equal to a d. The probability that a standard normal random variable is not equal to a
The notation p(z < a) represents the probability that a standard normal random variable is less than a. This can be found using a standard normal distribution table or a calculator that provides a normal distribution function.
The probability that a standard normal random variable is less than a can also be expressed as P(Z < a), where Z is a standard normal random variable.
The probability that a standard normal random variable is greater than a can be found using the complement rule, which states that the probability of an event occurring is equal to 1 minus the probability of the event not occurring. Therefore, P(Z > a) = 1 - P(Z < a).
The probability that a standard normal random variable is equal to a is zero, as the standard normal distribution is continuous and has an infinite number of possible values.
The probability that a standard normal random variable is not equal to a can be found using the complement rule again. P(Z ≠ a) = 1 - P(Z = a), where P(Z = a) = 0 (as mentioned above). Therefore, P(Z ≠ a) = 1.
Let's break down each part of your question and provide an explanation for each term:
a. The notation p(z < a) refers to the probability that a standard normal random variable (Z) is less than a certain value (a). In a standard normal distribution (with a mean of 0 and standard deviation of 1), this represents the area under the curve to the left of the value 'a'. To find this probability, you can refer to a standard normal table or use a calculator with a normal distribution function.
b. The probability that a standard normal random variable is greater than a (p(z > a)) can be calculated by subtracting the probability that the variable is less than a from 1 (since the total probability is always 1): p(z > a) = 1 - p(z < a).
c. In a continuous probability distribution like the standard normal distribution, the probability that a standard normal random variable is equal to a specific value (p(z = a)) is always 0. This is because there are an infinite number of possible values, and the probability associated with each individual value is negligible.
d. The probability that a standard normal random variable is not equal to a (p(z ≠ a)) is essentially the complement of the probability that it is equal to a. Since p(z = a) is 0 in a continuous distribution, the probability that the variable is not equal to a is 1: p(z ≠ a) = 1.
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the area of a sector of a circle with a central angle of 2 rad is 25 m2. find the radius of the circle.
Let's denote the radius of the circle by r. The radius of the circle is 5 meters.
The central angle of 2 radians means that it cuts off an arc whose length is equal to 2 times the radius, or 2r. The formula for the area of a sector is:
A = (1/2) r^2 θ
where A is the area of the sector, r is the radius, and θ is the central angle in radians. We can use this formula to find the radius of the circle:
25 = (1/2) r^2 (2)
25 = r^2
r = ±√25
Since the radius of a circle can't be negative, we take the positive square root:
r = 5 m
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given that p(a ∩ d)=2/5, find p(~ (a ∩ d)).
The probability of the event "~ (a ∩ d)", or the probability that either "a" OR "d" does not occur, is 3/5.
The symbol "∩" represents the intersection of two events.
For example, "a ∩ d" means the event where both "a" and "d" occur together.
The symbol "~" means "not" or "complement." So, "~ (a ∩ d)" means the event where "a ∩ d" does NOT occur, or in other words, where "a" OR "d" does not occur.
Now, onto the question.
We are given that p(a ∩ d) = 2/5, which means that the probability of both events "a" and "d" occurring together is 2/5.
We want to find the probability of the event "~ (a ∩ d)", or the probability that either "a" OR "d" does not occur.
To find this probability, we need to use some basic probability rules.
One of these rules is that the probability of an event happening (let's call it "E") is equal to 1 minus the probability of the complement of that event not happening (~E).
In other words, p(E) = 1 - p(~E).
So, if we apply this rule to the event "~ (a ∩ d)", we get:
p(~ (a ∩ d)) = 1 - p(a ∩ d)
Now we can substitute in the value we were given for p(a ∩ d):
p(~ (a ∩ d)) = 1 - 2/5
Simplifying this gives:
p(~ (a ∩ d)) = 3/5
Therefore, the probability of the event "~ (a ∩ d)", or the probability that either "a" OR "d" does not occur, is 3/5.
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solve the inequality
2c + 1 >7
—-
3
Answer:
c > 9
Step-by-step explanation:
[tex]\frac{2c}{3} +1 > 7[/tex]
To solve this, first subtract 1 from both sides
[tex]\frac{2c}{3} +1 > 7\\\frac{2c}{3} > 6[/tex]
multiply both sides by 3
2c > 18
divide both sides by 2
c > 9
Hope this helps! :)
Answer:
c > 9
Step-by-step explanation:
The discount rate is kept ________ the federal funds rate because the Fed prefers that ________. A) below; banks borrow reserves from each other B) below; banks borrow reserves from the Fed C) above; banks borrow reserves from each other D) above; banks borrow reserves from the Fed
The discount rate is kept above the federal funds rate because the Fed prefers that banks borrow reserves from each other in order to maintain a stable and competitive interbank lending market.
The discount rate is kept above the federal funds rate because the Fed prefers that banks borrow reserves from each other. So, the correct answer is option C) above; banks borrow reserves from each other. This is because the Federal Reserve wants to encourage banks to borrow from each other in the open market, which promotes stability and liquidity within the banking system.
This helps to ensure that banks have access to necessary funds and can lend to customers at reasonable rates. Therefore, option D is incorrect and the correct answer is A) below; banks borrow reserves from each other.
The discount rate is kept above the federal funds rate because the Fed prefers that banks borrow reserves from each other.
So, the correct answer is option C) above; banks borrow reserves from each other. This is because the Federal Reserve wants to encourage banks to borrow from each other in the open market, which promotes stability and liquidity within the banking system.
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barney and betty break into a parking meter with in dimes and quarters in it (legal disclaimer: don't do this), and agree that barney will get all the dimes, and betty will get all the quarters. (barney isn't terribly bright.) barney ends up with five more coins than betty. how much money did each get?
Fr the solution of Linear equations, the dollars earned by barney and betty are equal to $1.471428571 and $2.428571428 respectively.
We have barney and betty break into a parking meter. Amount of money from dimes and quarters = $3.90
Let the number of dimes and quarters collected by Barney and betty be x and y respectively. According to seniror,
x = y + 5 --(1)
Also, from unit conversion, 1 quarters
= 0.25 dollar and 1 dimes are worth the same as 0.1 dollar. So,
(number of dimes × value of 1 dimes in dollars ) + (number of quaters × value of 1 quaters in dollars )
=> 0.1 x + 0.25 y = $3.90
Multiple both sides by 100, we result
10x + 25 y = 390 --(2)
Now, we have two linear equations and we have to solve these for determining the values of x and y
Using Substitution method, Substitute value of x from equation(1) to equation(2),
=> 10( y + 5) + 25y = 390
=> 10y + 50 + 25y = 390
=> 35y = 340
=>[tex] y = \frac{ 340}{35}[/tex]
= 9.71428571429
from equation (1), x = 9.71428571429 + 5
= 14.7142857143.
So, money get by barney= 9.71428571429 × 0.25 = $2.428571428
and for betty = 14.71 × 0.1 = $1.471428571
Hence, required values are 2.428571428 dollars and 1.471428571 dollars.
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Complete question:
Barney and Betty break into a parking meter with $3.90 in dimes and quarters in it (legal disclaimer: don't do this), and agree that Barney will get all the dimes, and Betty will get all the quarters. (Barney isn't terribly bright.) barney ends up with five more coins than betty. how much money did each get?. oo
Given that
4x
F(x)= ∫ cos(t^2+2)dt,
0 what is F′(x)?(Do not include F′(x)="in your answer.
Thus, the value of F′(x) using the Fundamental Theorem of Calculus , F'(x) = 4cos(16x^2 + 2).
Using the Fundamental Theorem of Calculus, we can find the derivative F'(x) of the given function F(x).
The theorem states that if F(x) is defined as an integral from a constant (in this case, 0) to a function g(x), then the derivative F'(x) can be found by differentiating the function g(x) with respect to x and evaluating the result.
In this case, F(x) is given as the integral of cos(t^2 + 2) dt from 0 to 4x. Here, g(x) = 4x, and the integrand is cos(t^2 + 2). To find F'(x), we first differentiate g(x) with respect to x. The derivative of g(x) = 4x with respect to x is g'(x) = 4.
Now, according to the Fundamental Theorem of Calculus, we have F'(x) = cos(g(x)^2 + 2) * g'(x).
Substituting the expressions for g(x) and g'(x), we get:
F'(x) = cos((4x)^2 + 2) * 4
Simplifying this expression, we obtain the final result.
F'(x) = 4cos(16x^2 + 2)
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what is the probability of randomly choosing a 5-letter password for an internet web site that consists of only vowels?
The probability of randomly choosing a 5-letter password for an internet web site that consists of only vowels is approximately 0.00026 (or 0.026%).
There are 5 vowels in the English alphabet (a, e, i, o, u). To create a 5-letter password using only vowels, we have 5 choices for each letter in the password. Therefore, the total number of possible 5-letter passwords made up of only vowels is 5^5 = 3125.
To find the total number of possible 5-letter passwords, we need to consider all 26 letters of the English alphabet. Since there are 26 choices for each letter in the password, the total number of possible 5-letter passwords is 26^5 = 11,881,376.
The probability of randomly choosing a 5-letter password for an internet web site that consists of only vowels is the number of possible 5-letter passwords made up of only vowels divided by the total number of possible 5-letter passwords:
P(password consists of only vowels) = 3125 / 11,881,376
Therefore, the probability of randomly choosing a 5-letter password for an internet web site that consists of only vowels is approximately 0.00026 (or 0.026%).
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the price of a gallon of regular gasoline at 75 gas stations acoss the state is normally distrubuted wuith a mean of $2.05 and a standard deviavtion of 4
a) What percent of gas stations sell a gation of regular gas for less than $1.973
b) What percent of gas stations sell a gallon of regular gas for at least $2.17?
c) What is the probability that a gas station sells gallon of regular gas for less than $1.97 or greater than $2.05?
d) About how many stations sell a gallon of regular gas for no more than $2.013
The estimated number of stations selling gas for no more than $2.013 is approximately 0.1772 times 75, which is about 13.29, rounded to the nearest whole number, or 13.
To find the percentage of gas stations that sell a gallon of regular gas for less than $1.973, we need to standardize this value using the formula z = (x - mu) / sigma, where x is the value of interest, mu is the mean, and sigma is the standard deviation.
Thus, z = (1.973 - 2.05) / 0.04 = -1.925. Using a standard normal distribution table or calculator, we find that the percentage of gas stations selling gas for less than $1.973 is about 2.28%.
To find the percentage of gas stations selling gas for at least $2.17, we again standardize the value using z = (x - mu) / sigma. Thus, z = (2.17 - 2.05) / 0.04 = 3.00.
Using a standard normal distribution table or calculator, we find that the percentage of gas stations selling gas for at least $2.17 is about 0.14%.
To find the probability that a gas station sells gas for less than $1.97 or greater than $2.05, we need to calculate the z-scores for both values and use the standard normal distribution table or calculator to find the probabilities. Thus, z1 = (1.97 - 2.05) / 0.04 = -2.00 and z2 = (2.05 - 2.05) / 0.04 = 0.00.
The probability of a gas station selling gas for less than $1.97 is about 0.0228, and the probability of selling gas for greater than $2.05 is about 0.5. Therefore, the probability of selling gas for less than $1.97 or greater than $2.05 is approximately 0.0228 + 0.5 = 0.5228.
To estimate the number of stations selling gas for no more than $2.013, we need to standardize this value using the z-score formula and then use the standard normal distribution table or calculator to find the probability.
Thus, z = (2.013 - 2.05) / 0.04 = -0.925. Using a standard normal distribution table or calculator, we find that the probability of selling gas for no more than $2.013 is about 0.1772. Therefore, the estimated number of stations selling gas for no more than $2.013 is approximately 0.1772 times 75, which is about 13.29, rounded to the nearest whole number, or 13.
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About 2.74% of gas stations sell a gallon of regular gas for less than $1.973.
About 0.13% of gas stations sell a gallon of regular gas for at least $2.17.
The probability that a gas station sells a gallon of regular gas for less than $1.97 or greater than $2.05 is 2.28% + 50% = 52.28%.
About 17.88% of gas stations sell a gallon of regular gas for no more than $2.013, which is approximately 0.1788 x 75 = 13.41 or about 13 stations.
a) We need to find the area to the left of $1.973. z-score for $1.973 is given by:
z = (x - μ) / σ = (1.973 - 2.05) / 0.04 = -1.925
Using a standard normal table or calculator, we can find that the area to the left of z = -1.925 is 0.0274 or 2.74%.
b) We need to find the area to the right of $2.17. z-score for $2.17 is given by:
z = (x - μ) / σ = (2.17 - 2.05) / 0.04 = 3
Using a standard normal table or calculator, we can find that the area to the right of z = 3 is 0.0013 or 0.13%.
c) We need to find the area to the left of $1.97 and the area to the right of $2.05, and add them up. z-scores for $1.97 and $2.05 are given by:
z1 = (x1 - μ) / σ = (1.97 - 2.05) / 0.04 = -2
z2 = (x2 - μ) / σ = (2.05 - 2.05) / 0.04 = 0
Using a standard normal table or calculator, we can find that the area to the left of z = -2 is 0.0228 or 2.28%, and the area to the right of z = 0 is 0.5 or 50%.
d) z-score for $2.013 is given by:
z = (x - μ) / σ = (2.013 - 2.05) / 0.04 = -0.925
Using a standard normal table or calculator, we can find that the area to the left of z = -0.925 is 0.1788 or 17.88%.
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the odometer readings on a random sample of identical model sports cars are normally distributed with a mean of 120,000 miles and a standard deviation of 30,000 miles. consider a group of 6000 sports cars.approximately how many sports cars will have less than 150,000 miles on the odometer?
Answer:
about 45%
Step-by-step explanation:
it should be right
y is proportional to the square of (x-7) when x=12, y=2 Find y when x=17
Y is proportional to square of (X-7), when Y = 2 , X = 12 .
to make an equation we need to remove proportionality and so we multiply Y with an variable.
Let that variable be 'p'.
So according to the question,
Yp = (X-7)² (from this we will find p)
putting all the known values
2p= (12-7)²
2p = 5 * 5
p = 25/2
Now, using the same equation we will find Y , when X= 17.
Y * 25/2 = ( 17- 7)²
Y * 25/2 = 10 * 10
Y = 100 * 2 / 25
Y = 8
Step-by-step explanation:
y=(x-7)^2k....... equation 1
2=(12-7)^2xk
where k is constant
2=(5)^2k
2=(5x5)k
2=25k
*Divide both sides by coefficient of k*
2/25=25/25k
k=2/25
y=(17-7)^2 x2/25..... equation 2
y=(10)^2x2/25
y=(10x10) x2/25
y=100x2/25
y=200/25
y=8
Question 20 of 25
Does this graph show a function? Explain how you know.
V
OA. Yes, there are no y-values that have more than one x-value.
OB. No, there are y-values that have more than one x-value.
C. No, the graph fails the vertical line test.
OD. Yes, the graph passes the vertical line test.
The graph does not pass the vertical line test. (Option C)
A single vertical line can be drawn to pass through more than one point on the red curve. As a result, the vertical line test fails. We have scenarios when one input results in several outputs.
What is the vertical line test?To determine this, just draw a vertical line along the graph and count the number of times the vertical line touches the function's graph. If the vertical line meets the graph just once at each point, the graph represents a function.
The vertical line test is a graphical approach for assessing if a curve in the plane reflects the graph of a function by visually inspecting the curve's intersections with vertical lines.
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Full question:
See attached image.
22. Kalani met her friend at a park for a
18
8
morning run. The function er
f(x) = -x-10| + 5 models their un
distance from Kalani's apartment, in
miles, x minutes after they started
running. Graph the function in the
context of the situation.
vlags
The graph of the function f(x) = |-x - 10| + 5 in the context of the situation is added as an attachment
Graphing the function in the context of the situation.From the question, we have the following parameters that can be used in our computation:
The function f(x) = |-x - 10| + 5
Where
f(x) = distance from Kalani's apartmentx = minutes after they started runningUsing the above as a guide, we have the following:
We plot the minutes on the x-axis and the distance on the y-axis
The graph of the function is added as an attachment
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Complete question
Kalani met her friend at a park for a morning run. The function f(x) = |-x - 10| + 5 models their run distance from Kalani's apartment, in miles, x minutes after they started running. Graph the function in the context of the situation.
suppose we flip four coins simultaneously: a penny, a nickel, a dime, and a quarter. what is the probability that they all come up heads?
The probability that all four coins come up heads is 1/16 or approximately 0.0625.
The probability of flipping a head on a single coin is 1/2. Since each coin is flipped independently, the probability of all four coins coming up heads can be calculated by multiplying the probability of getting heads on each coin.
That is,
P(all heads) = P(heads on penny) × P(heads on nickel) × P(heads on dime) × P(heads on quarter)
Each of these probabilities is 1/2 since each coin has two possible outcomes – heads or tails – and they are equally likely to occur.
Thus,
P(all heads) = (1/2) × (1/2) × (1/2) × (1/2) = 1/16
This means that if we were to flip these four coins many times, on average we would expect to see all four coins come up heads about once in every 16 flips. It is important to note that the probability of all four coins coming up heads is independent of any previous flips – the coins do not "remember" whether they landed heads or tails on previous flips.
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Sum of angles in a
triangle
Task
Suppose ABC is a triangle in the plane as pictured below:
Suppose M is the midpoint of AC and N is the midpoint
of BC.
a. Draw the rotation of AABC by 180 degrees about M,
labeling the image of B as B'.
b. Draw the rotation of AABC by 180 degrees about N,
labeling the image of A as A'.
c. Explain why B', C, and A' are collinear.
d. Deduce that m(ZA) + m(ZB) + m(ZC) = 180.
I
Answer:
B
Step-by-step explanation:
it should be B
f(x)=1/2x-7/2 and g(x)=2x+14
Answer:
(-11.667, -9.333)
Step-by-step explanation:
were you looking for the intersection? that's what i just found. have a great day and thx for your inquiry.
if 81% of scheduled flights actually take place and cancellations are independent events, what is the probability that 3 seperate will all take place?
Assuming that cancellations are independent events, we can use the binomial distribution to find the probability that exactly 3 of the scheduled flights take place.
Let X be the number of flights that take place out of 3 scheduled flights. Then, X follows a binomial distribution with n=3 and p=0.81. The probability mass function of X is given by:
P(X=k) = (3 choose k) * (0.81)^k * (0.19)^(3-k)
where (3 choose k) is the binomial coefficient "3 choose k".
To find the probability that all 3 flights take place, we need to compute P(X=3):
P(X=3) = (3 choose 3) * (0.81)^3 * (0.19)^(0) = (1)(0.81)^3(1) = 0.531441
Therefore, the probability that all 3 scheduled flights will take place is approximately 0.531.
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ellen makes cookies and sells them at the local farmers' market. today, she is going to make batches of her famous cardamom cookies. she has a jar with 2 fluid ounces of cardamom, and her recipe calls for 1 4/5 tablespoons, or 3/10 of a fluid ounce, of cardamom in each batch. how many batches can ellen make with all of her cardamom?
Ellen can make a maximum of 6 batches of Cardamom cookies with her 2 fluid ounces of cardamom.
Ellen has 2 fluid ounces of cardamom in a jar. Her recipe requires 3/10 of a fluid ounce of cardamom for each batch of cardamom cookies.
We can use division to find the number of batches of cardamom cookies that Ellen can make with all of her cardamom:
2 fluid ounces ÷ (3/10 fluid ounce per batch) = (2/1) ÷ (3/10)
= (2/1) x (10/3)
= 20/3
= 6 2/3
Therefore, Ellen can make 6 batches of cardamom cookies with her 2 fluid ounces of cardamom, with 2/3 of a batch remaining.
Since she cannot make a fraction of a batch, Ellen can make a maximum of 6 batches of cardamom cookies with her 2 fluid ounces of cardamom.
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Find the volume of a sphere with a radius of 8 cm.
Answer:
Step-by-step explanation
The formula for the Volume of the sphere is
[tex]v= 4/3*\pi *r^{3}[/tex]
where r⇒radius of the sphere.
According to the question,
radius(r)=8cm
now,
volume(v)=4/3×π×r³
=4/3×π×8³ cm³
=4/3×512×π cm³
=2048/3×π cm³
∴The volume of a sphere with a radius of 8 cm is 2048π/3 cm³.
