It should be noted that Yes, there is evidence that the percentage of people agreeing with the statement about regional preferences differs between all urban and rural dwellers.
How to explain the hypothesisThe sample data shows that 54.6% of urban dwellers (325/598) agree with the statement, while only 40.1% of rural dwellers (54/137) agree. This difference is statistically significant at the p < 0.05 level (two-tailed).
The test statistic is 2.83. The p-value for this test statistic is 0.0047. Since this p-value is less than 0.05, we can reject the null hypothesis and conclude that there is evidence that the percentage of people agreeing with the statement about regional preferences differs between all urban and rural dwellers.
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5 cm
Find Surface Area. Rectangles use Aslw or Anbh. Triangles use A=1/ibb.
8 cm
cm
6 cm
2 cm
14
8 can
A=
12.m
12 cm
10 cm
C
First Part
The surface area of the two solids are listed below:
Case 1 - 232 square centimeters
Case 2 - 240 square centimeters
How to find the surface area of a solid
The surface area of a solid is the sum of the areas of all its faces. There are two cases of solids whose surface areas must be determined. The area formulas for triangle and rectangle are, respectively:
Triangle
A = 0.5 · b · h
Rectangle
A = b · h
Case 1
A = (6 cm) · (8 cm) + 2 · 0.5 · (6 cm) · (12 cm) + 2 · 0.5 · (8 cm) · (14 cm)
A = 232 cm²
Case 2
A = 2 · 0.5 · (8 cm) · (3 cm) + (8 cm) · (12 cm) + 2 · (5 cm) · (12 cm)
A = 24 cm² + 96 cm² + 120 cm²
A = 240 cm²
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pythagoras theorem problems
The missing lengths of the geometric systems are listed below:
Case A: x = √5, y = √6
Case B: x = 3, y = √34
Case C: x = 10, y = √104
Case D: x = 6, y = √13
Case E: x = √2, y = 2, z = √8
Case F: x = 2√51
How to find missing lengths in a system of geometric figures
In this problem we find six geometric systems formed by addition of triangles, whose missing lengths are determined by means of Pythagorean theorem:
r = √(x² + y²)
Where:
x, y - Legsr - HypotenuseNow we proceed to determine the missing lengths for each case:
Case A
x =√(2² + 1²)
x = √5
y = √(x² + 1²)
y = √6
Case B
x = 8 - 5
x = 3
y = √(3² + 5²)
y = √34
Case C
x = √(6² + 8²)
x = 10
y = √(10² + 2²)
y = √104
Case D
x = 15 - 9
x = 6
y = √(7² - 6²)
y = √13
Case E
x = √(1² + 1²)
x = √2
y = √(2 + 2)
y = 2
z = √(2² + 2²)
z = √8
Case F
x = 2 · √(10² - 7²)
x = 2√51
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1) Let A = {1, 2, 3} and B = {a,b}. Answer the following.
a) What is B ⨯ A ? Specify the set by listing elements.
b) What is A ⨯ B ? Specify the set by listing elements.
c) Explain why |B ⨯ A| = |A ⨯ B| when B ⨯ A ≠ A ⨯ B ?
B ⨯ A = {(a,1), (a,2), (a,3), (b,1), (b,2), (b,3)}.
A ⨯ B = {(1,a), (1,b), (2,a), (2,b), (3,a), (3,b)}.
When A and B have the same cardinality, the sets B ⨯ A and A ⨯ B have the same number of elements, and therefore the same cardinality.
We have,
a)
B ⨯ A is the Cartesian product of B and A, which is the set of all ordered pairs (b, a) where b is an element of B and a is an element of A.
Therefore,
B ⨯ A = {(a,1), (a,2), (a,3), (b,1), (b,2), (b,3)}.
b)
A ⨯ B is the Cartesian product of A and B, which is the set of all ordered pairs (a,b) where a is an element of A and b is an element of B.
Therefore,
A ⨯ B = {(1,a), (1,b), (2,a), (2,b), (3,a), (3,b)}.
c)
The cardinality of a set is the number of elements in that set.
We can prove that |B ⨯ A| = |A ⨯ B| by showing that they have the same number of elements.
Let n be the number of elements in A, and let m be the number of elements in B.
|B ⨯ A| = m × n because for each element in B, there are n elements in A that can be paired with it.
|A ⨯ B| = n × m because for each element in A, there are m elements in B that can be paired with it.
Since multiplication is commutative, m × n = n × m.
So,
|B ⨯ A| = |A ⨯ B|.
The statement "B ⨯ A ≠ A ⨯ B" is not always true, but when it is, it means that A and B have different cardinalities.
In this case, |B ⨯ A| ≠ |A ⨯ B| because the order in which we take the Cartesian product matters.
However, when A and B have the same cardinality, the sets B ⨯ A and A ⨯ B have the same number of elements, and therefore the same cardinality.
Thus,
B ⨯ A = {(a,1), (a,2), (a,3), (b,1), (b,2), (b,3)}.
A ⨯ B = {(1,a), (1,b), (2,a), (2,b), (3,a), (3,b)}.
When A and B have the same cardinality, the sets B ⨯ A and A ⨯ B have the same number of elements, and therefore the same cardinality.
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x^3 = -27
i rlly need this right
Answer:
X=-3
Step-by-step explanation:
-3^3 is -27
Answer:
x³ = -27
x³×⅓ = -3³
x = -3³×⅓
x = -3
On the interval [0, 2π), which points are intersections of r = 5 4 sin(θ) and r = −6 sin(θ)? check all that apply.
Correct option is D) and E)
(3,7π/6),(3,11π/6)
What is Point of intersection?Point of intersection is the point where two lines or two curves meet each other.
The point of intersection of two lines of two curves is a point.
If two planes meet each other then the point of intersection is a line.
The term "point of intersection" refers to the intersection of two lines. The equations a1x+b1y+c1=0 and a2x+b2y+c2=0, respectively, are used to represent these two lines. The two lines' intersection point is shown in the following figure. The intersection of three or more lines can also be located.
According to the given information:let
5 + 4 sin(θ) = −6 sin(θ)
Then get
θ= -1/2
Then you can make it
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I understand that the question you are looking for is:
On the interval [0, 2π), which points are intersections of r = 5 4 sin(θ) and r = −6 sin(θ)? check all that apply.
A) -3,7/6
B) (-3,11/6)
C) (3,7/6)
D) (3,11/6)
John will toss a coin 3 times. What is the probability the coin lands on heads all three times? Write the probability as a fraction and a decimal
Answer:
It has to be either HEADS or TAILS (obviously). If it's a “Fair” coin the probability of getting either a Heads or Tails is (1/2) for each option.
Conclusion(so far):
Prob (Heads Coin 1) = (1/2) AND
Prob (Tails Coin 1) = (1/2)
To meet the requirements of the question, the second coin toss must have the same result as for the first coin toss.
So if the result for Coin 1 was Heads then the result for Coin 2 must also be Heads.
So
(Prob (Heads Coin 1 AND Heads Coin 2) = (Prob Heads Coin1) * (Prob Heads Coin 2) = (1/2)*(1/2) = (1/4)
Conclusion (so far) (2 coins tossed):
Prob of two coin tosses BOTH giving Heads is (1/2)*(1/2) = (1/4)
AND similarly
Prob of two coin tosses BOTH giving Tails is also (1/2)*(1/2) = (1/4)
To meet the requirements of the question, the third coin toss will, by definition be either HEADS or TAILS.
AND
Prob (Coin 3 Heads) = (1/2) AND
Prob (Coin 3 Tails) = (1/2)
The question is clear: We are asked to find the Probability that the (3 tosses) are the same.
That is, if the first toss (Coin 1) is Heads, then the results for Coin 2 and Coin 3 tosses must also be Heads.
Similarly if the the first toss (Coin 1) is Tails, then the results for Coin 2 and Coin 3 tosses must also be Tails.
So for the tosses for Coins 1, 2 and 3 to each be Heads, we have:
Prob (Coin 1 Heads, Coin 2 Heads, Coin 3 Heads) = (1/2)*(1/2)*(1/2) = (1/8)
AND
Prob (Coin 1 Tails, Coin 2 Tails, Coin 3 Tails) = (1/2)*(1/2)*(1/2) = (1/8)
There are NO OTHER NUMBER COMBINATIONS WHICH MEET THE REQUIREMENTS OF THE QUESTION other than 3 Heads AND 3 Tails.
It is important to note THAT THE SITUATIONS ABOVE (3 Heads AND 3 Tails) are BOTH VALID SOLUTIONS.
Therefore
The Probability for 3 Heads is (1/8)
AND
The Probability for 3 Tails is (1/8)
BUT BOTH THESE SOLUTIONS ARE VALID PROBABILITIES and BOTH meet the requirements of the question.
Therefore the overall probability is THE SUM OF BOTH PROBABILITIES, that is:
The probability that after 3 tosses, the tosses of each coin ALL give the same result is:
(1/8) + (1/8) = (2/8) = (1/4) or 0.25 or 25%
This means that after 3 coin tosses there is a 25% probability that we will get either 3 Heads or 3 Tails.
(A note of interest: It would be an error to ignore the fact that there are TWO valid number combinations which meet the requirements of the question, not one).
(In my analysis above I have identified ONLY the valid-number combination)
Step-by-step explanation:
Question content area top
Part 1
Describe type I and type II errors for a hypothesis test of the indicated claim. A publicizes that 70% of applicants become
A smaller level of significance or a larger sample size can reduce the risk of a Type I error, but may increase the risk of a Type II error, and vice versa.
Type I and Type II errors are two types of errors that can occur in hypothesis testing. In the context of the claim that "70% of applicants become", a Type I error occurs when we reject the null hypothesis (i.e., the claim that the true proportion is 70%) when it is actually true. This means that we conclude that the proportion of applicants who become something other than 70%, even though it is actually 70%. The probability of making a Type I error is denoted by the symbol alpha (α).
On the other hand, a Type II error occurs when we fail to reject the null hypothesis when it is actually false. In the context of the claim that "70% of applicants become", a Type II error occurs when we accept the null hypothesis (i.e., conclude that the true proportion is 70%) when it is actually false (i.e., the true proportion is different from 70%). The probability of making a Type II error is denoted by the symbol beta (β).
In other words, a Type I error is a false positive, where we reject the null hypothesis when we should not have, and a Type II error is a false negative, where we fail to reject the null hypothesis when we should have.
To minimize the risk of both Type I and Type II errors, it is important to carefully choose the level of significance (alpha) and the sample size. A smaller level of significance or a larger sample size can reduce the risk of a Type I error, but may increase the risk of a Type II error, and vice versa.
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For which of these numbers would you most likely count rather than subitize?
A. 0
B. 1
C. 3
D. 5
A and B are typically subitized, which means that they can be immediately recognized without counting. C and D are more likely to be counted.
Counting is the process of determining the number of items in a set by successively adding one. Subitizing, on the other hand, is the ability to immediately recognize the number of items in a small set without counting. The capacity for subitizing is limited to small sets typically ranging from 1 to 5 items, depending on the individual's age and mathematical ability. The answer to this question would be option C, 3. For most individuals, recognizing the number of items in a set of 3 would require counting rather than subitizing, as 3 is at the upper limit of the typical range for subitizing.
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find the volume.round to the nearst tenth
1)
Volume of sphere is 113.1 ft³.
Given radius of sphere 3 ft.
Volume of sphere is 4/3× π ×r³
Substitute the value of radius in the formula of Volume of Sphere,
Volume of Sphere= 4/3×π×r³
= 4/3×22/7×3³
= 4/3×22/7×27
= 113.1 ft³
Hence the given sphere has volume of 113.1 ft³ rounded to the nearest tenth.
2)
Volume of cone is 94.3 yd³
Given diameter of base of cone and height of cone.
Diameter of base = 6 yd
Radius = diameter/2
Radius= 3 yd
Height of cone = 10 yd
Volume of cone = 1/3×π×r²×h
r = radius of base of cone
h = height of cone
Substitute the values of radius and height in the formula,
Volume of cone = 1/3×π×r²×h
= 1/3×22/7×3³×10
= 660/7
= 94.3 yd³
Hence volume of cone rounded to the nearest tenth is 94.3 yd³.
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Given f(x)=11^x, what is f^-1(x)?
Answer:
The first one
\( log_{11} \: (x)\)
Step-by-step explanation:
f(x) = 11^x
Here are the steps to find the inverse of a function:
1. Let f(x)=y
2. Make x the subject of formula.
3. Replace y by x.
\(11 {}^{x} = y \\ \: log(11 {}^{x} ) = log(y) \\ x log(11) = log(y) \\ x = \frac{ log(y) }{ log(11) } = log_{11}(y) \\ f {}^{ - 1} (x) = log_{11}(x) \)
16. Your scores on four algebra tests are 93, 69, 89, and 97: After the
next test, you want your average to be at least 84. What are the
possible scores for your next test?
Answer:
81 and above
Step-by-step explanation:
They have to be 81 and above
93+69+89+97=348
348/4=87 (average)
87=81=168
168/2= 84 (average)
Answer:
72 or higher hope i helped
Step-by-step explanation:
93 +69 +89+97+x/5= 84
348 +x/5=84
84x5=420
420-348=72
How do you solve this?
Answer:
The answer is
\( {13}^{3} \)Step-by-step explanation:
\(( {13})^{2}( {13})^{ - 4} ( {13})^{5} \)To solve the expression , use the rules of indices
Since the bases are the same and are multiplying we add the exponents
That's
\( {a}^{x} \times {a}^{y} \times {a}^{z} = {a}^{x + y + z} \)So we have
\(( {13})^{2}( {13})^{ - 4} ( {13})^{5} = {13}^{2 - 4 + 5} \\ = {13}^{ - 2 + 5} \)We have the final answer as
\( {13}^{3} \)Hope this helps you
Write the polynomial -x^(3)+10 x-4x^(5)+3x^(2)+7x^(4)+14 in standard form.
Then give the leading coefficient.
a.14+10 x+3x^(2)+7x^(3)-x^(4)-4x^(5) The leading coefficient is 14 .
b.14+10 x+3x^(2)-x^(3)+7x^(4)-4x^(5) The leading coefficient is 14 .
c.-4x^(5)+7x^(4)-x^(3)+3x^(2)+10 x+14 The leading coefficient is -1.
d.-4x^(5)+7x^(4)-x^(3)+3x^(2)+10 x+14 The leading coefficient is -4.
correct option is d. -4x⁵+7x⁴-x³+3x²+10x+14. The leading coefficient is -4.
The given polynomial is -x³+10x-4x⁵+3x²+7x⁴+14.
To write the polynomial in standard form, we write the terms in decreasing order of their exponents i.e. highest exponent first and lowest exponent at last.-4x⁵+7x⁴-x³+3x²+10x+14
Hence, the correct option is d.
-4x⁵+7x⁴-x³+3x²+10x+14. The leading coefficient is -4.
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You are working with the following selection of a spreadsheet: a b 1 customer address 2 sally stewart 9912 school st. North wales, pa 19454 3 lorenzo price 8621 glendale dr. Burlington, ma 01803 4 stella moss 372 w. Addison street brandon, fl 33510 5 paul casey 9069 e. Brickyard road chattanooga, tn 37421 in order to extract the five-digit postal code from brandon, fl, what is the correct function?
The correct function that gives the right syntax for the given data analysis is; =RIGHT(B3,5)
How to Interpret Data Cleaning Analysis?Data cleaning is defined as the process of fixing or removing data that are incorrect, incorrectly formatted, duplicate, corrupted, or even incomplete data that exists within a dataset.
Now, when we combine multiple data sources, what it means is that there could be many opportunities for the data to be duplicated or mislabeled.
Now, from the question, we can see the given data of the spreadsheet with customer names and address and as such, we can easily say that the correct syntax is =RIGHT(B3,5). This is because the RIGHT Function usually returns a set number of characters from the right side of a text string.
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How do you do this? Someone please answer quick
Answer:
b=a^2-6
Step-by-step explanation:
Answer:
square both sides, you will get
\(a^{2} = b + 6\\b = a^{2} - 6\)
Step-by-step explanation:
square both sides, you will get
\(a^{2} = b + 6\\b = a^{2} - 6\)
The digit 6 in which number represents a value of 6?
Choose 1 answer:
1)906
2)644
3)565
Answer:
1) 906
Step-by-step explanation:
It's in the ones value making it represent the value of 6
A confectionery company mixes three types of toffees to form one kilogram " toffee packs. the pack is sold at rs. 17. the three types of toffees cost rs.20, rs. 10, rs. 5 per kg. resp. the mixture must contain atleast 300 gms of first type. also weight of first two types must be at least be equal to weight of third type. find the optimal mix for maximum profit.answer
The maximum profit is 6 and it is obtained when we mix 0.6 kg of type A, 0 kg of type B, and 0.4 kg of type C.
The optimal mix for the maximum profit can be found as follows:
The company mixes three types of toffees, A, B, and C. Let the weights of type A, B, and C be a, b, and c kg, respectively. Let us assume that we are making 1kg of toffee pack. Therefore, the weight of type C should be 1 - (a + b) kg. Also, the mixture must contain at least 300 gms of type A i.e a >= 0.3 kg
Also, the weight of the first two types (A and B) must be at least equal to the weight of type C, i.e a + b >= c. This condition can also be written as a + b - c >= 0
Let us now calculate the total cost of making 1kg of toffee pack.
Cost = 20a + 10b + 5c
If the pack is sold at Rs. 17, then the profit per 1kg of toffee pack is by
Profit = Selling Price - Cost = 17 - (20a + 10b + 5c)
Now we have the following linear programming problem:
Maximize P = 17 - (20a + 10b + 5c)
Subject to constraints: a + b + c = 1 (since we are making 1kg of toffee pack)
a >= 0.3a + b - c >= 0a, b, c >= 0
We can use the simplex method to solve this linear programming problem. However, to save time, we can solve it graphically. The feasible region is as follows:
We can see that the corner points of the feasible region are: (0.3, 0, 0.7), (0.6, 0, 0.4), (0, 0.5, 0.5), and (0, 1, 0).
Let us calculate the profit at each of these corner points. For example, at the point (0.3, 0, 0.7), we have a = 0.3, b = 0, and c = 0.7. Therefore, the profit is
P = 17 - (20(0.3) + 10(0) + 5(0.7)) = 3.5
Similarly, we can calculate the profit at the other corner points as well. The corner point (0.3, 0, 0.7) gives a profit of 3.5
Corner point (0.6, 0, 0.4) result in a profit of 6
Corner point (0, 0.5, 0.5) results in a profit of 5
Corner point (0, 1, 0) gives a profit of 3
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In math we are learning about percents. What is 10% of 65
write an equation of the ellipse centered at (4, 1) if its minor axis is 8 units long and its major axis is 10 units long and parallel to the x-axis.
The equation of the ellipse centered at (4, 1) with a minor axis of 8 units and a major axis of 10 units parallel to the x-axis is: (x - 4)²/25 + (y - 1)²/16 = 1
To write the equation of the ellipse centered at (4, 1) with a minor axis of 8 units, a major axis of 10 units, and parallel to the x-axis.
We will use the standard equation of an ellipse in the form:
(x - h)²/a² + (y - k)²/b² = 1
Here, (h, k) represents the center of the ellipse, a is the semi-major axis, and b is the semi-minor axis.
Given that the ellipse is centered at (4, 1), we have h = 4 and k = 1.
Since the major axis is 10 units long and parallel to the x-axis, the semi-major axis a is half of that, which is 5 units.
Similarly, the minor axis is 8 units long, so the semi-minor axis b is half of that, which is 4 units.
Now, we can plug these values into the standard equation of an ellipse:
(x - 4)²/5² + (y - 1)²/4² = 1
Simplify the equation to:
(x - 4)²/25 + (y - 1)²/16 = 1
The equation of the ellipse centered at (4, 1) with a minor axis of 8 units and a major axis of 10 units parallel to the x-axis is:
(x - 4)²/25 + (y - 1)²/16 = 1
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What is the minimum value on the interval 2 ≤x ≤10?
EXPLANATION
Given the function
f(x) = sqrt(x-1) -3
The minimum value on the interval 2≤x≤10 is -3.
We can get this by sketching different points as follows:
x y=sqrt(x-1) -3
0 undefined
1 -3
2 -2
5 -1
10 0
How many solutions does 3 - 2x = 5-x+ 3 + 4x have?
Answer:
It should be one, right??
Step-by-step explanation:
Cause, if u follow the order of operations, you would follow the same steps. I’m not tryin to take points but don’t mark me brainliest.
Answer:
One solution
Step-by-step explanation:
If you put the two equations on a graphing calculator you would see that there are only 1 point that has intersected. For a more written answer, you would combine -x and 4x to get 3x and 5 and 3 to get 8.
From there on out, you would then have this equation 3 - 2x = 8 + 3x. Add 2x both sides to get 3 = 8 + 5x, then subtract 8 both sides to get -5 = 5x. Divide both sides to get x = -1. This is the only known solution that I know of.
graph of f(x)=0.5(4)^x
The graph of the exponential function is on the image at the end.
How to find the graph of the exponential function?Here we want to graph the function:
f(x) = 0.5*(4)ˣ
To graph this (or any function) we can find some points on the function, and to do so, we need to evaluate it.
when x = 0:
f(0) = 0.5*(4)⁰ = 0.5
Then the point is (0, 0.5)
when x = 1
f(1) = 0.5*(4)¹ = 2
So we have the point (1, 2)
if x = 2
f(2) = 0.5*(4)² = 8
So we have the point (2, 8)
Now we can graph these points and connect them with a general exponential curve.
The graph of the exponential function is shown below.
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a subset of the set of integers from 1 to 100, inclusive, has the property that no two elements of sum to 125. what is the maximum possible number of elements in ?
The maximum possible number of elements in set B is 62.
A set contains elements or members that can be mathematical objects of any kind, including numbers, symbols, points in space, lines, other geometric shapes, variables, or even other sets. A set is the mathematical model for a collection of various things.
The universal set is A consisting of the primary one hundred positive integers.
Now, Set B is a subset of A.
Set B might be made up of the first 62 positive numbers, for example.
Only then is 123 the largest number that can be formed by adding all the components of set B.
Set B contains 62 items altogether.
Additionally, we can carefully swap out one or more pieces from set B and add them to its complement.
In the majority of these cases, set B may have 62 elements.
Therefore, we get the number of elements in set B will be 62.
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.Sketch the graph of f by hand and use your sketch to find the absolute and local maximum and minimum values of f. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) f(x) = sin(x), 0
The absolute maximum and minimum values of f are 1 and -1, respectively.
The given function is f(x) = sin(x)
, where 0 <= x <= 2π.Sketch the graph of f by hand:graph of f(x) = sin(x)
(where 0 <= x <= 2π)
Use the graph of f to find the absolute and local maximum and minimum values of f.
The absolute maximum value of f is 1, which occurs at x = π/2.
The absolute minimum value of f is -1, which occurs at x = 3π/2.
The local maximum values of f are 1, which occur at x = π/2 + 2πk
(k = 0, ±1, ±2, ...), and the local minimum values of f are -1, which occur at
x = 3π/2 + 2πk
(k = 0, ±1, ±2, ...).
Thus, the absolute maximum value of f is 1, and it occurs at x = π/2, and the absolute minimum value of f is -1, and it occurs at x = 3π/2.
The local maximum values of f are 1, which occur at x = π/2 + 2πk
(k = 0, ±1, ±2, ...), and the local minimum values of f are -1, which occur a
t x = 3π/2 + 2πk (k = 0, ±1, ±2, ...).
Hence, the absolute maximum and minimum values of f are 1 and -1, respectively.
The local maximum values of f are 1, which occur at x = π/2 + 2πk (k = 0, ±1, ±2, ...), and the local minimum values of f are -1,
which occur at x = 3π/2 + 2πk (k = 0, ±1, ±2, ...).
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PLZ HELP AND HURRY!!!
Answer this question
Answer:A
Step-by-step explanation:
math
Answer:
A
Step-by-step explanation:
6 cartoons will contain 4 more broken eggs than 4 cartoons and this is because if each cartoon is 12 eggs and each contain 2 broken ones then 6 cartoons would have 4 more which will equal 12 broken eggs in total.
Customers arrive at a barber shop according to a Poisson process at a rate of eight per hour. Each customer requires 15 minutes on average. The barber shop has four chairs and a single barber. A customer does not wait if all chairs are occupied. Assuming an exponential distribution for service times, compute the expected time an entering customer spends in the barber shop.
If the barber shop has four chairs and a single barber and each customer requires 15 minutes on average then assuming an exponential distribution for service times, the expected time an entering customer spends in the barbershop is 0.5 minutes.
In a Poisson process, the number of arrivals is independent of the past and the future and the time between consecutive arrivals is exponentially distributed. Customers are arriving at the barber shop according to a Poisson process at a rate of eight per hour.
The average arrival rate of the customer is given as = 8 customers/hour, which means that the average time between arrivals will be 7.5 minutes. The customer service time is given as exponentially distributed, so the expected customer service time is the inverse of the service rate.
Therefore, the expected service time = 1/4 = 0.25 hours = 15 minutes. We can then use the M/M/1 queuing model to determine the expected time an entering customer spends in the barbershop. The M/M/1 queuing model is based on the following assumptions:
Arrivals occur according to a Poisson process.The service time distribution is exponential.There is only one server.The system capacity is infinite.There are no waiting spaces in the system.Since there are four chairs in the barber shop, we can assume that the system capacity is four.
So, the system capacity is less than infinity.
We can modify the M/M/1 queuing model for M/M/1/4 queuing model.
According to the queuing model, the expected time an entering customer spends in the barbershop can be calculated as:
W = 1/μ - 1/λ + 1/(μ-λ) * (1- (λ/μ)^4)
Where: λ = Arrival rate
μ = Service rate
W = Waiting time per customer
Therefore,
W = 1/0.25 - 1/0.5 + 1/(0.5-0.25) * (1- (0.25/0.5)^4) = 0.5 - 2 + 2.6667*0.9375 = 0.5 minutes
Therefore, the expected time an entering customer spends in the barbershop is 0.5 minutes.
Learn more about exponential distribution:
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Bart is going to paint his bedroom. His uncle told him that a gallon of paint would cover a surface of approximately 40 square feet. He knew that the ceiling in his room was 9 feet high and the paint was $22 a gallon. He also had to buy brushes, a drop cloth, and a ladder. How many gallons of paint should he buy to paint the walls in his bedroom
Answer:
The measurement for the length of the walls.
Step-by-step explanation:
Given
\(Cost = \$22\) per gallon
\(Height = 9ft\)
\(1\ gallon = 40ft^2\)
See comment for complete question
Required
The additional information needed to solve the question
First, we need to calculate the area of the walls of the bedroom.
The height of the ceilings represents the length/width of the walls; so, we need the width of each side of the bedroom.
Since the width is not given, then we can conclude that the additional information needed is the length/width of the walls.
Please help 16 over 20 as decimal and why
Answer: .8
Step-by-step explanation:
\(\frac{16}{20}\) >reduce the fraction first by dividing the top and the bottome by 4
so it is easier to divide
=\(\frac{4}{5}\) >now divide 4 by 5
> 4 cannot go into 5 so you would place a decimal point after the 4 and add a 0
>4.0 divided by 5 is .8
=.8
you get a decimal which is less than 1 because you only have 4/5 which is less than 1 whole so you only get a portion as a decimal.
Long division is the universal way, but it can also be approached differently.
We know that \(20\cdot5=100\), therefore \(\dfrac{16}{20}=\dfrac{16\cdot5}{20\cdot5}=\dfrac{80}{100}=\dfrac{8}{10}=0.8\).
Or simplify \(\dfrac{16}{20}\) first: \(\dfrac{16}{20}=\dfrac{4}{5}\). Then using the same logic as above - \(5\cdot2=10\), therefore we \(\dfrac{4}{5}=\dfrac{4\cdot2}{5\cdot2}=\dfrac{8}{10}=0.8\).
Using the figure show, find the missing values. Round each value. Every time I put this up people get it wrong
Answer:
I'm sorry, I can help you with only this one :( ∠F = 44°
Step-by-step explanation:
∠F = 180° - (46° + 90°) = 44°
Springfield's current record for rainfall in a year is 2 feet. But, last month, they got 6 inches of rain! The mayor wonders what the new record would be if they had 6 inches of rain every month for a whole year. If this happened, by how many feet would Springfield beat their annual record for rainfall?
Answer:
4 feet
Step-by-step explanation:
2 feet = 24 inches
6 inches = 1/2 foot
There are 12 months in a year.
12*(1/2) = 6 feet (72 inches)
OR
12*6 = 72 inches (6 feet)
If it rained 6 inches or 1/2 foot every month of a year, it would rain 6 feet or 72 inches that year.
6-2 = 4 feet
This would be 4 feet of rain more than Springfield's world record.