Answer:
1/50
Step-by-step explanation:
Divide 2/100 by 2 to get the simplest form.
eighty-two percent of all women who submit to pregnancy tests are pregnant. a new pregnancy test gives a false positive result with probability 0.02 and a correct positive result with probability 0.95. define the events: p: {a woman is pregnant} and : {the pregnancy test is positive}. a)
The probability that a woman is actually pregnant given that the test is positive is 0.974 (or 97.4%).
a) To find the probability that a woman is actually pregnant given that the test is positive, we can use Bayes' theorem:
P(p|+) = P(+|p) P(p) / P (+)
where P(p) is the prior probability of a woman being pregnant (which is 0.82), P (+) is the probability of a positive test result, and P(+|p) is the conditional probability of a positive test result given that the woman is pregnant.
We are given that the test has a false positive rate of 0.02, which means that P(+|~p) = 0.02 (where ~p denotes "not pregnant"). We are also given that the test has a correct positive rate of 0.95, which means that P (+|p) = 0.95. Therefore, we can calculate:
P (+) = P(+|p) P(p) + P(+|~p) P(~p)
= 0.95 * 0.82 + 0.02 * (1 - 0.82)
= 0.802
Substituting into Bayes' theorem, we get:
P(p|+) = 0.95 * 0.82 / 0.802
= 0.974
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determine whether the number described is a statistic or a parameter. in a survery of hospital employees, feel that they are overworked.
In a survery of hospital employees here it is parameter or statistic data is given in Question
Parameters are numeric values that characterize the population as a whole. A statistic is a number that describes the characteristics of a sample.
For example, median income in the United States is a demographic parameter. Conversely, the median income for the US sample is a sample statistic. Both values represent median income, but one is a parameter to the statistic. Easy to remember parameters and stats! Both are summary values that describe the group and have a convenient mnemonic device to remind you which group is being described. Notice their initials.
Parameter = Population
Statistics = Sample
A population is the entire group of people, things, animals, trades, etc. that are being studied. A sample is part of a population.
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A recent study showed that tea drinkers have lower stress levels than coffee drinkers. Tea drinkers are known to have a higher proportion of yoga practitioners than coffee drinkers, and they exercise on average two hours per week more than their coffee-drinking counterparts. What is the term used to describe these additional factors that might have an effect on the stress levels of tea drinkers?
The additional factors that might have an effect on the stress levels of tea drinkers are called confounding variables. Confounding variables are variables that are not the main focus of the study but may have an impact on the results.
The term used to describe these additional factors that might have an effect on the stress levels of tea drinkers is "confounding variables." Confounding variables are extraneous factors that can affect the relationship between two variables of interest and can lead to incorrect conclusions about the relationship. In this case, the higher proportion of yoga practitioners and the increased exercise among tea drinkers could be considered confounding variables because they may be influencing the observed relationship between tea drinking and lower stress levels, rather than tea consumption alone.
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The set {0,1,2,3,4,5,6,7,8,9,} has how many subsets?
Answer:
Step-by-step explanation:
The set {0,1,2,3,4,5,6,7,8,9} has 2^10 = 1024 subsets. To see why, note that each element can be either in or out of a given subset, so there are 2 choices for each of the 10 elements, giving 2x2x2x2x2x2x2x2x2x2 = 1024 possible subsets.
Two circles have a 24-cm common chord, their centers are 14 cm apart, and the radius of one of the circles is 13 cm. Make an accurate drawing, and find the radius for the second circle in your diagram. There are two solutions; find both.
That hypotenuse is the radius of the second circle which is equal to 15.
The segment joining the centers of the circles bisects the common chord.
So in the circle with radius 13, the common chord, the segment joining the centers of the circles, and the radius to an endpoint of the common chord form a right triangle with hypotenuse 13 and one leg 12; that makes the distance from the center of that circle to the common chord 5.
Since the length of the segment joining the two circles is 14, the distance from the center of the other circle to the common chord is 14-5=9.
Then in that other circle, we have a right triangle with legs 9 and 12, making the hypotenuse 15.
And that hypotenuse is the radius of the second circle which is equal to 15.
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b) How much
2. The original price of a MacBook is $1400. Students get a 10% discount. How much will
after the discount?
Show work
nswer:
Answer:
$1400 divided by 10 = $140
$1400 - $140 = $1260
Solve this equation.
Answer:
[tex]\dfrac{4a^6b^5}{c^3}[/tex]
Step-by-step explanation:
Given expression:
[tex]\dfrac{8a^4b^{-3}c^{12}}{2a^{-2}b^{-8}c^{15}}[/tex]
Separate like terms:
[tex]\dfrac{8}{2} \cdot \dfrac{a^4}{a^{-2}}\cdot \dfrac{b^{-3}}{b^{-8}} \cdot \dfrac{c^{12}}{c^{15}}[/tex]
Divide the numbers:
[tex]4\cdot \dfrac{a^4}{a^{-2}}\cdot \dfrac{b^{-3}}{b^{-8}} \cdot \dfrac{c^{12}}{c^{15}}[/tex]
[tex]\textsf{Apply the exponent rule} \quad \dfrac{a^b}{a^c}=a^{b-c}:[/tex]
[tex]4 \cdot a^{4-(-2)} \cdot b^{-3-(-8)} \cdot c^{12-15}[/tex]
Simplify the exponents:
[tex]4 \cdot a^6 \cdot b^5 \cdot c^{-3}[/tex]
[tex]\textsf{Apply the exponent rule} \quad a^{-n}=\dfrac{1}{a^n}:[/tex]
[tex]4 \cdot a^6 \cdot b^5 \cdot \dfrac{1}{c^3}[/tex]
Simplify:
[tex]\dfrac{4a^6b^5}{c^3}[/tex]
If sin(θ)>0 and sec(θ)<0, in which quadrant does θ lie?
Answer:
Quadrant II
Step-by-step explanation:
sin (∅) > 0 means sin (∅)is positive
sec (∅) < 0 means sec (∅) is negative
thus,
∅ lies in quadrant II
fill in the blank. the ___performs all arithmetic operations (for example, addition and subtraction) and all logic operations (such as sorting and comparing numbers). (please use acronym) multiple choice question.
The CPU (Central Processing Unit) performs all arithmetic operations (for example, addition and subtraction) and all logic operations (such as sorting and comparing numbers).
The acronym that fills in the blank is CPU, which stands for Central Processing Unit. The CPU is essentially the brain of a computer, responsible for processing all the information that flows through the system.
Arithmetic operations are those that involve mathematical calculations, such as addition, subtraction, multiplication, and division. These are relatively straightforward tasks for the CPU, which can perform them quickly and accurately.
Logic operations, on the other hand, involve comparing and manipulating data based on various conditions.
CPU has the ability to perform logic operations is a crucial aspect of computing, as it allows computers to make decisions and process information based on a set of rules or conditions.
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En una progresión aritmética sabemos que a2 =1 y a5 =7. Halla el término general y los términos a8 , a15 y a20
The general rule of the arithmetic sequence is given as follows:
[tex]a_n = -1 + 2(n - 1)[/tex]
The terms are given as follows:
[tex]a_8 = 13[/tex][tex]a_{15} = 27[/tex][tex]a_{20} = 37[/tex]What is an arithmetic sequence?An arithmetic sequence is a sequence of values in which the difference between consecutive terms is constant and is called common difference d.
The nth term of an arithmetic sequence is given by the following rule:
[tex]a_n = a_1 + (n - 1)d[/tex]
The difference between the 3 terms is of 6, hence the common difference is given as follows:
3d = 6
d = 2.
As the 2nd term is of 1, the first term is of:
[tex]a_1 = 1 - 2 = -1[/tex]
Hence the rule is given as follows:
[tex]a_n = -1 + 2(n - 1)[/tex]
The terms are given as follows:
[tex]a_8 = -1 + 2 \times 7 = 13[/tex][tex]a_{15} = -1 + 2 \times 14 = 27[/tex][tex]a_{20} = -1 + 2 \times 19 = 37[/tex]More can be learned about arithmetic sequences at https://brainly.com/question/30544915
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A plane left New York at 3:30pm EST and arrived in Los Angeles at 4:15pm PST. How long did the flight take?
The flight takes a total of 3 hours 45 minutes
How to determine how long did the flight take?From the question, we have the following parameters that can be used in our computation:
Inital time = 3:30 pm EST
Final time = 4:15 pm PST
When converted, we have
Inital time = 12:30 pm PST
Final time = 4:15 pm PST
So, we have
Difference = 4:15 pm PST - 12:30 pm PST
Evaluate the difference
Difference = 3 hours 45 minutes
Hence, the diration is 3 hours 45 minutes
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A group of 5 friends are playing poker one night, and one of the friends decides to try out a new game. They are using a standard 52-card deck. The dealer is going to deal the cards face up. There will be a round of betting after everyone gets one card. Another round of betting after each player gets a second card, etc. Once a total of 7 cards have been dealt to each player, the player with the best hand will win. However, if any player is dealt one of the designated cards, the dealer collects all cards, shuffles, and starts over.
The designated cards are: 6 of Spades, Jack of Diamonds. The players wish to determine the likelihood of actually getting to play a hand without mucking the cards and starting over.
In how many ways can you deal the cards WITHOUT getting one of the designated cards? (Hint: Consider how may cards are in the deck that are NOT one of the designated cards and consider how many cards need to be dealt in order for each player to have 7 cards.)
In how many ways can you deal each player 7 cards, regardless of whether the designated cards come out?
What is the probability of a successful hand that will go all the way till everyone gets 7 cards? (Round your answer to 4 decimal places.)
Recall, while using your calculator, that E10 means to move the decimal place 10 places to the right.
a) The number of ways to deal the cards without getting one of the designated cards are equals to the 2250829575120.
b) The number of ways to deal each player 7 cards, regardless of whether the designated cards come out are equals to the 21945588357420.
c) The probability of a successful hand that will go all the way till everyone gets 7 cards is equals to the 0.1025.
Five friends group are playing poker one night. They have a standard 52-card deck. So, here total possible outcomes
= 52
Now, the designated cards are 6 of Spades, Jack of Diamonds. So,
a) Number of cards are in the deck that are not one of the designated cards = 52 - 2 = 50
Number of cards that need to be dealt in order for each player to have 7 cards
= 5× 7 = 35
Thus total possible number of ways
= ⁵⁰C₃₅ = 2250829575120, which are ways to deal the cards without getting one of the designated cards.
b) Number of cards are in the deck = 52
Number of cards that need to be dealt in order for each player to have 7 cards
= 5× 7 = 35
Thus total possible number of ways
= ⁵²C₃₅ = 21945588357420
Which are ways to deal each player 7 cards, regardless of whether the designated cards come out.
c) The probability of a successful hand that will go all the way till everyone gets 7 cards is = Number of ways to deal the cards without getting one of the designated cards/Total number of ays to deal the cards
= 2250829575120/21945588357420
= 0.10256410256
Hence, required probability is 0.10256.
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Complete question:
A group of 5 friends are playing poker one night, and one of the friends decides to try out a new game. They are using a standard 52-card deck. The dealer is going to deal the cards face up. There will be a round of betting after everyone gets one card. Another round of betting after each player gets a second card, etc. Once a total of 7 cards have been dealt to each player, the player with the best hand will win. However, if any player is dealt one of the designated cards, the dealer collects all cards, shuffles, and starts over. The designated cards are: 6 of Spades, Jack of Diamonds. The players wish to determine the likelihood of actually getting to play a hand without mucking the cards and starting over.
a) In how many ways can you deal the cards WITHOUT getting one of the designated cards? (Hint: Consider how may cards are in the deck that are NOT one of the designated cards and consider how many cards need to be dealt in order for each player to have 7 cards.)
b) In how many ways can you deal each player 7 cards, regardless of whether the designated cards come out?
c) What is the probability of a successful hand that will go all the way till everyone gets 7 cards? (Round your answer to 4 decimal places.) Recall, while using your calculator, that E10 means to move the decimal place 10 places to the right.
determine the volume of the solid with a circular base of radius a whose cross sections are squares that are perpendicular to the base.
The volume of the solid is [tex]4a^2h[/tex].
Each square cross-section has a side length equal to the diameter of the circle, which is 2a.
Therefore, the area of each cross-section is
[tex](2a)^2 = 4a^2[/tex]
The volume of the solid can be found by integrating the area of the cross sections over the height of the solid.
Since the cross-sections are perpendicular to the base, the height of each cross-section is equal to the thickness of the solid, which we can denote as dx.
Thus, the volume of the solid is given by the integral of the cross-sectional area with respect to x, from x = 0 to x = h, the height of the solid:
V = ∫ (0 to h) [tex]4a^2 dx[/tex]
V = [tex]4a^2[/tex] ∫(0 to h) dx
V = [tex]4a^2[/tex] (0 to h)
V = [tex]4a^2[/tex] (h - 0)
V = [tex]4a^2h[/tex]
Therefore, the volume of the solid is [tex]4a^2h[/tex]
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PLEASE please please help, it will mean the world to me, and if you are right I will give brainliest. And try to show work! Mr Smith is putting a brick border around his irregular shaped garden. Before installing the border, he must cut the bricks to fit the angles of the garden. Use the given measures to answer this question. What are the angle measures of each vertex of the yard? Show your work.
The value of x is 24. The angle measures of each vertex of the yard are m∠A = 160°, m∠B = 142°, m∠C = 120°, m∠D = 156°, m∠E = 31°, m∠F = 111°.
What is a polygon?
A polygon is a closed polygonal chain made up of a finite number of straight line segments and is a type of plane figure in geometry. A polygon is a region that is bounded by a bounding circuit, a bounding plane, or both. A polygonal circuit's segments are referred to as its edges or sides.
The formula of the sum of interior angles of a polygon is (n - 2)×180°, where n is number of sides.
The number of sides of the given irregularly shaped garden is 6.
The sum of the interior angles of the garden is (6 - 2)×180° = 720°
Also given:
m∠A = (7x - 8)°, m∠B = (4x + 46)°, m∠C = (5x)° , m∠D = (6x + 12)°, m∠E = (x + 7)°, m∠F = (5x - 9)°.
The sum of the interior angles of the garden is
(7x - 8)° + (4x + 46)° + (5x)° + (6x + 12)° + (x + 7)° + (5x - 9)°
Therefore,
(7x - 8)° + (4x + 46)° + (5x)° + (6x + 12)° + (x + 7)° + (5x - 9)° = 720°
Combine like terms:
(7x +4x + 5x + 6x + x + 5x) + (-8 +46 + 12 + 7 - 9) = 720
28x + 48 = 720
Subtract 48 from both sides:
28x = 672
Divide both sides by 28:
x = 24
Putting x = 28 in the given angles:
m∠A = (7×24 - 8)° = 160°
m∠B = (4×24 + 46)°= 142°
m∠C = (5×24)° = 120°
m∠D = (6×24 + 12)°= 156°
m∠E = (24 + 7)° = 31°
m∠F = (5×24 - 9)° = 111°
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Over 1000 people try to climb mt Everest every year. Of those who try to climb Everest, 31 precent succeed. The probability that a climber is at least 60 years old is 0.04 The probability that a climber is at least 60 years old and succeeds in climbing Everest is 0.005.
P(success I at least 60 years old) = 0.125.
What is the probability?The possibility of an event in time is known as a probability in mathematics. How frequently does the incidence occur over the course of a specific time period, in plain English?
Given:
Over 1000 people try to climb mt Everest every year.
Of those who try to climb Everest, 31 percent succeed.
The probability that a climber is at least 60 years old is 0.04.
The probability that a climber is at least 60 years old and succeeds in climbing Everest is 0.005.
P(success I at least 60 years old) = 0.005/0.04 = 0.125
Therefore, the probability is 0.125.
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2. For the expression not chosen, describe a situation that the expression might represent. x-8
The expression that represents the number of inches the plant grew is 8 - x.
What is Expression?An expression is combination of variables, numbers and operators.
A plant measured x inches tall last week and 8 inches tall this week.
We have to find the expression which represent the plant grew this week.
The number of inches the plant grew can be represented by the difference between its height this week and its height last week.
Eight minus x is the required expression.
8 - x
Hence, the expression that represents the number of inches the plant grew is 8 - x.
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Complete question
A plant measured x inches tall last week and 8 inches tall this week. Represent the number of inches the plant grew
A. X - 8
B. 8 - X
For the expression not chosen, describe a situation that the expression might represent.
There are 9 girls and 6 boys taking golf lessons. Write the ratio that compares the number of girls taking golf lessons to the total number of students taking golf lessons.
Answer:
2:5
Step-by-step explanation:
We know
There are 9 girls and 6 boys taking golf lessons.
So, there are a total of 15 taking a golf lesson.
Write the ratio that compares the number of girls taking golf lessons to the total number of students taking golf lessons.
The ratio is
6:15 = 2:5
So, the ratio is 2:5
A corporation has four factories, each of which manufactures sport utility vehicles and pickup trucks. The number of units of vehicle produced at factory in one day is represented by in the matrixA = | 100 90 70 30 || 40 20 60 60 |Find the production levels if production is increased by 10%
If the production is increased by 10%, the new production levels for sport utility vehicles and pickup trucks are:
Factory 1: 110 sport utility vehicles
Factory 2: 99 sport utility vehicles
Factory 3: 77 sport utility vehicles, 66 pickup trucks
Factory 4: 33 sport utility vehicles, 66 pickup trucks
To find the production levels if production is increased by 10%, we need to multiply each entry of the matrix by 1.1:
A' = 1.1A = | 110 99 77 33 || 44 22 66 66 |
The matrix A' represents the new production levels. The entry in the first row and first column of A' (110) represents the number of sport utility vehicles produced at the first factory after the 10% increase in production. Similarly, the entry in the second row and third column of A' (66) represents the number of pickup trucks produced at the third factory after the 10% increase in production.
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f ( x ) = { 2 x + 4 , x ≤ − 2 4 + 1 2 x , − 2 < x < 2 − x + 5 , 2 ≤ x Which of the following is the graph of the function shown above? A line starts at a closed circle (minus 2, 0) and passes through (minus 4, minus 4). The second line starts at a closed circle (2, minus 3) and passes through (5, 0). The third line with 2 open circles at (2, 6) and (minus 2, 3) W. A line starts at a closed circle (minus 2, 0) and passes through (minus 4, minus 4). The second line starts at a closed circle (2, minus 3) and passes through (5, 0). The third line with 2 open circles at (2, 3) and (minus 2, 5) X. A line starts at a closed circle (minus 2, 0) and passes through (minus 4, minus 4). The second line starts at a closed circle (2, 3) and passes through (5, 0). The third line with 2 open circles at (minus 2, 3) and (2, 5) Y. A line starts at a closed circle (minus 2, 0) and passes through (minus 4, minus 4). The second line starts at an open circle (2, 3) and passes through (5, 0). The third line with an open circle at (minus 2, 3) and a closed circle at (2, 5) Z. A. W B. X C. Y D. Z
Answer:
The correct graph of the given function is option C. Y.
Step-by-step explanation:
The correct graph is option B (X) because it satisfies all the conditions specified in the function definition.
The first segment of the graph starts at x=-2 and goes to the left, passing through the point (-4,-4) and representing the equation 2x+4. The second segment of the graph starts at x=-2 and goes to the right, passing through the point (2,3) and representing the equation 4+1/2x. The third segment of the graph starts at x=2 and goes to the right, passing through the point (5,0) and representing the equation -x+5.
Option A (W) has a line that passes through the point (2,6), which is not on the graph of the function, and option C (Y) has a line that passes through the point (2,5), which is also not on the graph of the function. Option D (Z) has an open circle at (-2,3), which should be a closed circle according to the function definition, and a closed circle at (2,5), which should be an open circle according to the function definition.
square root of 64 minus 10 plus 13
Answer:
11
Step-by-step explanation:
[tex]\sqrt{64}[/tex] -10 + 13
8 - 10 + 13
-2 + 13
11
Jaxson works in a department store selling clothing. He makes a guaranteed salary of $250 per week, but is paid a commission on top of his base salary equal to 15% of his total sales for the week. How much would Jaxson make in a week in which he made $1800 in sales? How much would Jaxson make in a week if he made
�
x dollars in sales?
Answers: Base salary 520:
When selling for X:0.15
Total sales:250+0.15 or 0.15+250
Answer:
Step-by-step explanation:
250 per week base
15%of 1800 he made is = 270
270+250 =520
He made 520$ in the week he made 1800$ in sales
Jaxson's salary is a combination of a fixed $250 plus 15% commission on his weekly sales. For $1800 in sales, he will earn $520. If the sales amount is x dollars, then he will earn $250 + 0.15*x dollars in a week.
Explanation:Jaxson's income consists of a guaranteed base salary of $250 per week and a commission of 15% on his total weekly sales. If Jaxson made $1800 in sales in a week, his total income for the week would be his base salary plus his commission i.e., $250 + 0.15*$1800 = $520.
Similarly, if Jaxson made x dollars in sales in a week, his total income for that week would be his base salary plus his commission on the sales i.e., $250 + 0.15*x dollars.
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The equation below describes a parabola. If a is negative, which way does the parabola open?
y= ax?
If a is negative, the parabola opens down. Option C is the correct option.
What is a parabola?
Any point on a parabola is at an equal distance from both the focus, a fixed point, and the directrix, a fixed straight line. A parabola is a U-shaped plane curve. The topic of conic sections includes parabola, and all of its concepts are covered here.
A polynomial function of the second degree is a quadratic function. A quadratic function has this general form:
y = ax² + bx + c
A parabola is a name for a quadratic function's graph.
A parabola resembles the letter "U" or an upside-down "U" in general shape.
If the leading coefficient is greater than zero, the parabola opens upward; if the leading coefficient is less than zero, the parabola opens downward. This simple rule can be used to determine whether the graph of a quadratic function opens upward or downward.
Given equation is
y = ax²
The leading coefficient is a and it is a negative number. Thus the parabola opens down.
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Sergio has
p
pp paintings in his art collection. He and other local painting collectors agreed to donate a total of
48
4848 paintings to the local museum. Each of the
12
1212 collectors will donate the same number of paintings.
How many paintings will Sergio have in his art collection after his donation?
Write your answer as an expression.
Answer: Let's assume that each of the 12 collectors donates n paintings. Then the total number of paintings donated will be 12 * n. We know that the total number of paintings donated by all collectors is 48, so we have the equation:
12 * n = 48
Dividing both sides by 12, we find that each collector donates n = 4 paintings. So, if Sergio has p paintings in his collection, after his donation he will have p - 4 paintings in his collection. The final answer is:
p - 4
Step-by-step explanation:
Let X and Y be continuous random variables with joint density f
X
,
Y
(
x
,
y
)
=
e
−
y
,
f
o
r
0
<
x
≤
y
<
[infinity]
and 0 otherwise.
Find rho
X
Y
.
The correlation coefficient of X and Y is 1, since their joint density is always positive for x ≤ y.
The correlation coefficient of two continuous random variables X and Y is a measure of how similar the two variables are in terms of their behavior. In this case, X and Y have a joint density of e−y, for 0 < x ≤ y < ∞ and 0 otherwise. This implies that the correlation coefficient of X and Y is 1, since their joint density is always positive for x ≤ y. This means that there is a perfect linear relationship between the two variables, meaning that as one variable increases, the other will also increase by the same amount.
To calculate the correlation coefficient, we need to calculate the covariance and variances of X and Y. The covariance is calculated by integrating the joint density of X and Y over the given range. The variance of X and Y is then calculated by taking the square root of the expected value of the squares of the differences between the expected value of X and Y and their respective observed values. Since the joint density of X and Y is always positive for x ≤ y, the correlation coefficient of X and Y will always be 1.
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27
Select the correct answer.
Number of Players on the Team Time Taken to Complete Game (in minutes)
Teams with varying numbers of players are playing a group card game. The time taken by each team to complete one game is given in the table.
What is the relationship between the two variables?
2
3
4
5
O A. positive linear association
O B. exponential relationship
O C.
negative linear association
32
26
20
14
The relationship between the two variables negative linear association.
What is Linear Association?A straight-line link between two variables is referred to statistically as a linear relationship (or linear association).
Linear relationships can be represented graphically or mathematically as the equation y = mx + b.
Given:
The data table is organized as follows:
1 2 3 4 5
32 26 20 14 8
We see that more the number of members in the team increase, the more the times decrease.
The correlation is a negative linear association, we conclude.
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Find the volume common to two spheres, each with radius r, if the distance between their centers is r/2.
(given information: A cap of a sphere with radius r = 5 and height h = 2.)
The common volume of the two spheres is 5πr³/6. Since the two spheres are identical, the volume of the common portion is twice the volume of the spherical cap.
Since the distance between the centers of the two spheres is r/2, a cross-section of the two spheres and the plane perpendicular to their centers of symmetry will form an isosceles triangle with height h=r/2 and base 2√(r²-(r/2)²). The intersection of the two spheres will be a spherical cap with height h and radius r. The volume of this spherical cap is
V_cap = (1/3)π[tex]h^2[/tex](3r-h).
Since the two spheres are identical, the volume of the common portion is twice the volume of the spherical cap, so
V_common = 2V_cap = (2/3)π[tex]h^2[/tex](3r-h) = (5/6)πr³.Substituting h=r/2, we get
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jaden has a spinner with 8 sections labeled with letters, each section is the same size, as shown below. jaden spins the arrow 75 times, which result is most likely to be the number if times the arrow will land on a section labeled s or t?
The probability that the arrow will land on a section labeled S or T is 7/8.
What is Probability?Probability is a branch of mathematics that deals with the likelihood of an event occurring. It is the measure of the likelihood of an event occurring divided by the number of possible outcomes. Probability is used to determine the chances of a particular outcome occurring and can range from 0 to 1.
Therefore, it is likely that the arrow will land on one of these sections around 56 to 57 times out of 75 spins. It is impossible to predict exactly how many times the arrow will land on S or T, as this is a probability-based outcome. Generally speaking, with such a large number of spins, the result should be close to the probability of 7/8.
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the geometric distribution arises as the distribution of the number of times we flip a coin until it comes up heads. consider now the distribution of the number of flips until the -th head appears, where each coin flip comes up heads independently with probability . this is known as the negative binomial distribution, and we also write . find . hint: here counts the number of flips including the flip with the -th head. mark the correct expression for , below.
The correct expression for P(X = k) will be [tex]P(X = k) = \binom{k-1}{r-1} \left(\frac{1}{2}\right)^k[/tex]
Given,
The geometric distribution arises as the distribution of the number of times we flip a coin until it comes up heads. consider now the distribution of the number of flips until the -th head appears, where each coin flip comes up heads independently with probability.
The negative binomial distribution describes the probability of getting the -th success (in this case, heads) on the th trial, given a probability p of success on each trial.
We can write this as:
[tex]P(X = k) = \binom{k-1}{r-1} p^r (1-p)^{k-r}[/tex]
where k is the number of flips needed to get r successes, including the rth success.
In this case, we want the distribution of the number of flips until the rth head appears,
so we can set p = 1/2,
since the coin is fair.
We also need to adjust the formula to count the number of flips, including the flip with the rth head.
Since we need r heads to appear, the last head must appear on the rth flip, so we can write:
[tex]P(X = k) = \binom{k-1}{r-1} \left(\frac{1}{2}\right)^r \left(\frac{1}{2}\right)^{k-r+1}[/tex]
Simplifying the expression,
we get:
[tex]P(X = k) = \binom{k-1}{r-1} \left(\frac{1}{2}\right)^k[/tex]
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Do you think global warming will have an impact on you during your lifetime? A CBS News/New York Times poll of 1000 adults in the United States asked this ques- tion (CBS News website, December, 2014). Consider the responses by age groups shown below Response Age 18-29 30+Yes 134 131No 293 432Unsure a. What is the probability that a respondent 18-29 years of age thinks that global warming will not pose a serious threat during his/her lifetime?b. What is the probability that a respondent 30+ years of age thinks that global warming will not pose a serious threat during his/her lifetime? c. For a randomly selected respondent, what is the probability that a respondent answers yes? d. Based on the survey results, does there appear to be a difference between ages 18-29 and 30+ regarding concern over global warming?
From the given data the probability that a respondent 18-29 years and 30+ years are 0.536 and 0.654 espectively. The probability that they answer yes (i.e. global warming will have an impact on them during their lifetime) is 0.265. There also appears to be a difference between ages 18-29 and 30+ regarding concern over global warming.
The probability that a respondent 18-29 years of age thinks that global warming will not pose a serious threat during his/her lifetime is:
P(18-29 and No) = 293/(134 + 293 + 117) = 0.536
The probability that a respondent 30+ years of age thinks that global warming will not pose a serious threat during his/her lifetime is:
P(30+ and No) = 432/(131 + 432 + 178) = 0.654
For a randomly selected respondent, the probability that they answer yes (i.e. global warming will have an impact on them during their lifetime) is:
P(Yes) = (134 + 131)/(134 + 131 + 293 + 432 + 117 + 178) = 0.265
Yes, there appears to be a difference between ages 18-29 and 30+ regarding concern over global warming. The probability of a respondent 30+ years of age thinking that global warming will not pose a serious threat during their lifetime (0.654) is higher than the corresponding probability for respondents 18-29 years of age (0.536). This suggests that older respondents are less concerned about global warming than younger respondents. However, a formal statistical test would be needed to confirm this difference.
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Find the position vector of a particle that has the given acceleration and the specified initial velocity and position.
a(t) = 19ti + etj + e -tk, v(0) = k, r(0) = j + k
The position vector of a particle that has an acceleration, a(t) = 19t i + eᵗ j + e⁻ᵗ k, is equals to the 19 (t³/6)i + (eᵗ - t )j - (e⁻ᵗ - 2t - 2)k.
We have, The acceleration vector function of a particle is defined as, a(t)
= 19t i + eᵗ j + e⁻ᵗ k and intial velocity and position is, v(0) = k, r(0) = j + k.
We have to calculate the position vector of a particle. Now, as we know, the acceleration of a particle is equals to derivative of velocity of particle with time. In other words, velocity is integration of acceleration with respect to time.
Mathematically, v(t) = ∫a(t)dt , let C be integration constant ( vector).
v(t) = ∫a(t)dt = ∫[ (19t) i + (eᵗ) j + (e⁻ᵗ) k] dt
=> v(t) = 19(t²/2) i + eᵗ j - e⁻ᵗ k + C
At t = 0 , v(0) = k
=> k = 19(0²/2) i + e⁰j - e⁻⁰ k + C
=> k = 0 + j - k + C
=> C = 2k - j
so, v(t) = 19(t²/2) i + eᵗ j - e⁻ᵗ k + 2k - j
= 19(t²/2) i + (eᵗ - 1) j - (e⁻ᵗ - 2) k
Now, Position of a particle is determined by integrating the velocity of particle with respect to time, r(t) = ∫v(t)dt , let D be integration constant ( vector). So, r(t)
= ∫[19(t²/2) i + (eᵗ - 1) j - (e⁻ᵗ - 2) k ] dt
= 19 (t³/6) i + eᵗ j - t j - e⁻ᵗ k + 2t k + D
At t = 0, r(0) = j + k
=> j + k = 19 (0³/6) i +e⁰ j - 0j - e⁻⁰ k +2× 0k +D
=> j + k = 0 + j - k + D
=> D = 2k
so, r(t) = 19 (t³/6) i + eᵗ j - t j - e⁻ᵗ k + 2t k + 2k
= 19 (t³/6)i + (eᵗ - t )j - (e⁻ᵗ - 2t - 2)k
Hence, required position vector is 19 (t³/6)i + (eᵗ - t )j - (e⁻ᵗ - 2t - 2)k.
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