Answer:
(d) a matched pairs experiment.
Step-by-step explanation:
The correct answer is option D that is d) a matched pairs experiment.
A matched pair experiment is special case of randomize block design. This experiment can be used when the statement has two treatment conditions and subjects are grouped into pair based on some treatment. For each pair, random treatments are assigned to the subjects. It is an improvement over complete randomized design.
This is an experiment because a treatment (the MP3 players) was assigned to different members of the sample(the assembly line workers) randomly.
This study is a d) matched pairs experiment where assembly line workers are given portable mp3 players to play their chosen music while working for one month and then work without music for another month, with the order determined randomly.
Explanation:This study is a matched pairs experiment because each worker serves as their own control by experiencing both treatments, with the order of treatments determined randomly. In a matched pairs experiment, participants are paired up based on similar characteristics, and each pair is randomly assigned to different treatments. Here, the workers are matched based on their own preferences for the music they choose.
The workers are given portable mp3 players and can choose their own music, which serves as the treatment variable. The productivity of the workers is measured in two different months, one with music and one without music. By comparing the workers' productivity in the two months, the study aims to determine the effect of music on productivity.
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Fresh pond has a population of 854 and is increasing by 3 people per year. Strawberry has a population of 427 and is increasing by 10% per year. Write an equation that models the growth for each town.
Answer:
Fresh Pond: p(t) = 854 +3tStrawberry: p(t) = 427·1.10^tStep-by-step explanation:
(a) The general term of an arithmetic sequence is ...
an = a1 + d(n -1)
If we let the sequence of population numbers be modeled by this, and we use t for the number of years, we want n=1 for t=0, so n = t+1 and we have ...
p(t) = 854 +3(t+1-1)
p(t) = 854 +3t
__
(b) The general term of a geometric sequence is ...
an = a1·r^(n-1)
were r is the common ratio. Here, the multiplier from one year to the next is 1+10% = 1.10. Again, n=t+1, so the population equation is ...
p(t) = 427·1.10^(t+1-1)
p(t) = 427·1.10^t
Angelica has been depositing $280 each month into a savings account with an APR of 2.76% for the last 3 years. If she continues depositing this amount for an additional 12 years, what will the balance in her savings account be?
Answer:
$62,490.65
Step-by-step explanation:
If we assume her deposits are at the beginning of the month, and that the interest is compounded monthly, the future value is that of an "annuity due." The formula is ...
FV = P(1+r/n)((1+r/n)^(nt)-1)/(r/n)
where r is the APR (.0276), n is the number of yearly compoundings (12), P is the monthly payment ($280), and t is the number of years (15). Putting the numbers into the formula and doing the arithmetic, we get ...
FV = $280(1.0023)(1.0023^180 -1)/(.0023) ≈ $62,490.65
Angelica's account balance after 15 years will be $62,490.65.
_____
If her deposits are at the end of the month, the balance will be $62,347.25.
A builder wishes to construct a ramp 21 feet long that rises to a height of 5 feet above level ground. What angle should the ramp make with the horizontal? Decimal approximations will be marked incorrect. Symbolic trigonometric expressions such as arctan(5) are accepted. 1/ 5 21 α cos radians
Answer:
α = 13.39249775
Step-by-step explanation:
Length of the vamp = 21 ft long
Height of the vamp= 5 ft
using SOHCAHTOA
tanα = opposite /adjacent
Tan α = 5/21
α = arctan(5/21)
α = 13.39249775
A man and a woman agree to meet at a certain location about 12:30 P.M. If the man arrives at a time uniformly distributed between 12:15 and 12:45, and if the woman independently arrives at a time uniformly distributed between 12:00 and 1 P.M., find the probability that the first to arrive waits no longer than 5 minutes. What is the probability that the man arrives first?
Final answer:
To find the probability that the first to arrive waits no longer than 5 minutes and the probability that the man arrives first, follow the provided detailed steps.
Explanation:
To find the probability that the first to arrive waits no longer than 5 minutes:
Man arrives first: 1/6
Woman arrives first: 1/4
Man and Woman arrive simultaneously within 5 minutes: 1/12
The probability that the man arrives first: 1/6
Daniela invested a total of $50,000, some in a certificate of deposit (CD) and the remainder in bonds. The amount invested in bonds was $5,000 more than twice the amount she put into the CD. How much did she invest in each account? Call the amount that Daniela invested in the CD d and the amount she invested in bonds b.
Answer:
The amount invested in bonds = 35,000
The amount invested in CD = 15,000.
Step-by-step explanation:
The total amount that Daniela invested is $50,000, this means if we call the amount invested in bonds [tex]b[/tex], and the amount invested in CD [tex]d[/tex], then we have:
[tex]b+d=50,000[/tex] this says the total amount Daniela invested is $50,000.
And since the amount invested in bonds [tex]b[/tex] is $5,000 more than twice the amount Daniela put into the CD, we have:
[tex]b=5,000+2d[/tex].
Thus, we have two equations and two unknowns [tex]b[/tex] and [tex]d[/tex]:
(1). [tex]b+d=50,000[/tex]
(2). [tex]b=5,000+2d[/tex],
and we solve this system by substituting [tex]b[/tex] from the second equation into the first:
[tex]b+d=50,000\\5,000+2d+d=50,000\\3d=45,000\\\\\boxed{d=15,000}[/tex]
or, the amount invested in CD is $15,000.
With the value of [tex]d[/tex] in hand, we now solve for [tex]b[/tex] from equation(2):
[tex]b=5,000+2d\\b=5000+2(15,000)\\\boxed{b=35,000}[/tex]
or, the amount invested in bonds is $35,000.
The ___________ of a lens or mirror is a rotational symmetry axis of the surfaces.
Answer:
Optical axis
Step-by-step explanation:
Optical axis is the rotational symmetry axis of the surfaces.
A line with a certain degree of rotational symmetry is called as the optical axis in an optical system.
It is the straight line that passes through the geometric center of the lens and joins two curvature centers of its surfaces.
It is also called as the principal axis.
Late shows Some TV shows begin after their scheduled times when earlier programs run late. According to a network’s records, about 3% of its shows start late. To find the probability that three consecutive shows on this network start on time, can we multiply (0.97)(0.97)(0.97)? Why or why not?
Answer:
No because the probability of consecutive shows starting late are not independent events
Step-by-step explanation:
Is good begin with the definition of independent events
When we say Independent Events we are refering to events which occur with no dependency of other evnts. Basically when the occurrence of one event is not affected by another one.
When two events are independent P(A and B) = P(A)xP(B)
But for this case we can't multiply 0.97x0.97x0.97 in order to find the probability that 3 consecutive shows start on time, because the probability for shows starting late are not independent events, because if the second show is late, the probability that the next show would be late is higher. And for this reason we can use the independency concept here and the multiplication of probabilities in order to find the probability required.
Yes, you can multiply (0.97)(0.97)(0.97) because the events are independent.
Yes, you can multiply (0.97)(0.97)(0.97) to find the probability that three consecutive shows on this network start on time. This is because the events are independent; the outcome of one show starting on time does not affect the outcome of the others.
Therefore, the probability that three consecutive shows start on time is the product of the probabilities of each show starting on time: P(all three shows start on time) = 0.97 * 0.97 * 0.97 = 0.912673.
11. Solve the problem. A company manufactures televisions in batches of 25 and there is a 1% rate of defects. Find the standard deviation for the number of defects per batch.
0.7
0.9
0.5
72.8
Answer: 0.5
Step-by-step explanation:
For binary distribution with parameters p (probability of getting success in each trial) and n (Total trials) , we have
[tex]\sigma=\sqrt{np(1-p)}[/tex]
We are given that ,
Total batches of televisions : n=25
The probability of defects : p= 0.01
Here success is getting defective batch .
Then, the standard deviation for the number of defects per batch will be :-
[tex]\sigma=\sqrt{(25)(0.01)(1-0.01)}\\\\=\sqrt{(25)(0.01)(0.99)}\\\\=\sqrt{0.2475}\\\\=0.497493718553\approx0.5[/tex] [Rounedde to the nearest tenth.]
Therefore, the standard deviation for the number of defects per batch =0.5
help me QUICK, plz! 15 points!
Answer:
t=8
Step-by-step explanation:
Subtract 12t from both sides
(12t-12t) + 16 = (13t-12t) + 24
16 = 1t (or just t) + 24
Then subtract 16 from both sides, and bring "t" over the equals sign making it a negative integer.
-t = 8
t = 8
Katie keeps a record of her transactions in a notebook. Looking over her records for the past two weeks, Katie finds that her bank statement does not match her notebook, and she actually has more money than she thought she did. These are the relevant entries in Katie’s notebook:
Transaction
Debit ($)
Credit ($)
Beginning Balance
889.23
Fence repair
75.86
---
Dry cleaning
32.38
---
Paycheck
---
140.91
Gift from cousin
---
35.00
Car payment
178.66
---
Tax refund
---
66.18
New chair
161.55
---
Ending Balance
682.87
However, Katie’s bank statement says that her ending balance is $707.10. Which of the following is a possible explanation for the discrepancy?
a.
Katie’s neighbor paid for half of the fence repair, which Katie forgot to record.
b.
Katie transposed the digits in the cost of the dry cleaning, which actually cost $23.38.
c.
Katie’s new chair was on sale for 15% off, making it cost $137.32, but Katie wrote down the before-sale price.
d.
Katie’s tax refund came in two equal-sized checks, but Katie only recorded one of them.
Answer: C
Step-by-step explanation:707.10-682.87= 24.23. Similar difference can also be found in only chair which is. 161.55-137.32=24.23
Answer:
The correct answer is C on edge :) i just did the test
Step-by-step explanation:
Tyler reads of a book on Monday, of it on Tuesday, of it on Wednesday, and of the remainder on Thursday. If he still has 14 pages left to read on Friday, how many pages are there in the book?
There are total of 32 pages in the complete book.
What are word problems?A word problem is a few sentences describing a 'real-life' scenario where a problem needs to be solved by way of a mathematical calculation.
Given is that Tyler reads 2/15 of a book on Monday, 1/3 of it on Tuesday, 2/9 of it on Wednesday, and 3/4 of the remainder on Thursday. He still has 14 pages.
Let the total number of pages in the book will be [x]. Then, we can write -
{2x/15} + {x/3} + {2x/9} + {3x/4} = x + 14
x{2/15 + 1/3 + 2/9 + 3/4} - 14 = x
259x/180 - 14 = x
1.44x - 14 = x
0.44x = 14
x = (14/0.44)
x = 32 (approx.)
Therefore, there are total of 32 pages in the complete book.
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URGENT!!!
Find the equation x^2 + y^2 + Dx + Ey + F = 0
of the circle that passes through the points. To verify your result, use a graphing utility to plot the points and graph the circle.
(0, 0), (8, 8), (16, 0)
Answer:
D= -16
E= 0
F= 0
Step-by-step explanation:
The given equation is [tex]x^{2} + y^{2} + Dx + Ey + F = 0[/tex]
It is also given that the circle passes through (0,0) (16,0) and (8,8).
Inserting (0,0) in the equation, it gives
[tex]0 + 0 + 0 + 0 + F = 0[/tex]
This gives F = 0 .
Now inserting (16,0) , it gives
[tex]16^{2} + 0^{2} + D(16) + E(0) + 0 = 0[/tex]
[tex]D(16) = -256[/tex]
[tex]D = \frac{-256}{16}[/tex]
D = -16
Now inserting (8,8) , it gives
[tex]8^{2} + 8^{2} + (-16)(8) + (E)(8) + 0 = 0[/tex]
[tex]-16 + E = -16[/tex]
E = 0
Thus the equation of circle is
[tex]x^{2} + y^{2} + (-16)x = 0[/tex]
We can draw the following graph and thus verify that points (0,0) (8,8) and (16,0) lie on graph.
The equation of the circle passing through points (0, 0), (8, 8), and (16, 0) is x^2 + y^2 - 16x - 16y = 0. Solving the system of equations derived from substituting the given points into the circle equation confirms these coefficients for D and E.
Explanation:To find the equation of the circle that passes through the points (0, 0), (8, 8), and (16, 0), we can use the standard form of a circle's equation:
x
2
+
y
2
+ D
x
+ E
y
+ F = 0
Because the circle passes through the origin (0,0), we know that F = 0. With the remaining points (8, 8) and (16, 0), we can substitute these coordinates into the equation to form a system of equations.
Using point (8,8), the equation becomes:
64 + 64 + 8D + 8E + F = 0
Using point (16,0), the equation becomes:
256 + 16D + F = 0
Since F = 0, the system of equations is:
8D + 8E + 128 = 016D + 256 = 0Solving these equations, we get:
D = -16E = -16The equation of the circle is therefore:
x2 + y2 - 16x - 16y = 0To verify the result, plotting the points and the graph of the circle on a graphing utility should show that the points lie on the circumference of the circle.
Which ordered pairs are on the line with equation 3x-y=2.
a) (0, -2) b) (-3, 4) c) (1, -5)
The ordered pair (0 , -2) lies on the line with equation 3 x - y = 2
Step-by-step explanation:
To prove that a point lies on a line
Substitute x and y in the equation by the coordinates of the pointIf the two sides of the equation equal each other, then the point lies on the lineIf the two sides of the equation not equal each other then the point does't lie on the lineThe equation of the line is 3 x - y = 2
a) Point (0 , -2)
∵ x = 0 and y = -2
- Substitute the values of x and y in the left hand side
∵ The left hand side is 3 x - y
∵ 3(0) - (-2) = 0 + 2 = 2
∴ The left hand side = 2
∵ The right hand side = 2
∴ The two sides of the equation are equal
∴ The ordered pair (0 , -2) lies on the line
b) Point (-3 , 4)
∵ x = -3 and y = 4
- Substitute the values of x and y in the left hand side
∵ The left hand side is 3 x - y
∵ 3(-3) - (4) = -9 - 4 = -13
∴ The left hand side = -13
∵ The right hand side = 2
∴ The two sides of the equation are not equal
∴ The ordered pair (-3 , 4) doesn't lie on the line
c) Point (1 , -5)
∵ x = 1 and y = -5
- Substitute the values of x and y in the left hand side
∵ The left hand side is 3 x - y
∵ 3(1) - (-5) = 3 + 5 = 8
∴ The left hand side = 8
∵ The right hand side = 2
∴ The two sides of the equation are not equal
∴ The ordered pair (1 , -5) doesn't lie on the line
The ordered pair (0 , -2) lies on the line with equation 3 x - y = 2
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Given the functionf ( x ) = x^2 + 7 x + 10/ x^2 + 9 x + 20
Describe where the function has a vertical asymptote and how you found your answer. Remember that an asymptote is represented by an equation of a line and not just a single value.
x = -4 is a vertical asymptote for the function.
Explanation:The graph of [tex]y=f(x)[/tex] is a vertical has an asymptote at [tex]x=a[/tex] if at least one of the following statements is true:
[tex]1) \ \underset{x\rightarrow a^{-}}{lim}f(x)=\infty\\ \\ 2) \ \underset{x\rightarrow a^{-}}{lim}f(x)=-\infty \\ \\ 3) \ \underset{x\rightarrow a^{+}}{lim}f(x)=\infty \\ \\ 4) \ \underset{x\rightarrow a^{+}}{lim}f(x)=\infty[/tex]
The function is:
[tex]f(x)=\frac{x^2+7x+10}{x^2+9x+20}[/tex]
First of all, let't factor out:
[tex]f(x)=\frac{x^2+5x+2x+10}{x^2+5x+4x+20} \\ \\ f(x)=\frac{x(x+5)+2(x+5)}{x(x+5)+4(x+5)} \\ \\ f(x)=\frac{(x+5)(x+2)}{(x+5)(x+4)} \\ \\ f(x)=\frac{(x+2)}{(x+4)}, \ x\neq 5[/tex]
From here:
[tex]\bullet \ When \ x \ approaches \ -4 \ on \ the \ right: \\ \\ \underset{x\rightarrow -4^{+}}{lim}\frac{(x+2)}{(x+4)}=? \\ \\ \underset{x\rightarrow -4^{+}}{lim}\frac{(-4^{+}+2)}{(-4^{+}+4)} \\ \\ \\ The \ numerator \ is \ negative \ and \ the \ denominator \\ is \ a \ small \ positive \ number. \ So: \\ \\ \underset{x\rightarrow -4^{+}}{lim}\frac{(x+2)}{(x+4)}=-\infty[/tex]
[tex]\bullet \ When \ x \ approaches \ -4 \ on \ the \ left: \\ \\ \underset{x\rightarrow -4^{-}}{lim}\frac{(x+2)}{(x+4)}=? \\ \\ \underset{x\rightarrow -4^{-}}{lim}\frac{(-4^{-}+2)}{(-4^{-}+4)} \\ \\ \\ The \ numerator \ is \ a \ negative \ and \ the \ denominator \\ is \ a \ small \ negative \ number \ too. \ So: \\ \\ \underset{x\rightarrow -4^{-}}{lim}\frac{(x+2)}{(x+4)}=+\infty[/tex]
Accordingly:
[tex]x=-4 \ is \ a \ vertical \ asymptote \ for \\ \\ f(x)=\frac{x^2+5x+2x+10}{x^2+5x+4x+20}[/tex]
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Supppose A is an invertible n\times n matrix and v is an eigenvector of A with associated eigenvalue -3. Convince yourself that v is an eigenvalue of the following matrices, and find the associated eigenvalues:
1. \ A^6, \ eigenvalue = ,
2. \ A^{-1}, \ eigenvalue = ,
3. \ A + 5 I_n, \ eigenvalue = ,
4. \ 6 A, \ eigenvalue = .
Answer:you will an app go to =567
In the last math test andrew answered 80% of all the questions correctly.If he answered 32 questions correctly, what was the total number of questions in the math test?
Answer:
The total number of questions are 40
Step-by-step explanation:
let the total number of questions be "x".
percent of questions answered correctly are 80.
In fractions 80% is [tex]\frac{4}{5}[/tex]
The total number of correctly answered questions are 32.
the equation is,
[tex](\frac{4}{5})(x) = 32[/tex]
thus , x = [tex]\frac{(5)(32)}{4}[/tex]
x= 40
Scenario: The market for used cell phones is very popular in Barylia. However, several phones available in this market are of inferior quality and it is often impossible to differentiate between a good-quality phone and a poor-quality phone. Refer to the scenario above. Based on the given information, we can conclude that the market for used cell phones in Barylia: is perfectly competitive. has only one seller. is monopolistically competitive. has asymmetric information.
Answer:
D: has asymmetric information.
Step-by-step explanation:
Several phones available in Barylia market are of inferior quality and it is often impossible to differentiate between a good-quality phone and a poor-quality phone.
So, we can conclude that the market for used cell phones in Barylia: has asymmetric information.
Asymmetric information or often called information failure shows the decision in transactions where one market or party has got better information than the others.
You select a family with three children. If M represents a male child, and F represents a female child, the set of equally likely outcomes for the children's genders is { MMM, MMF, FFM, MFF, FFM, FMF, FFM, FFF }. Find the probability of selecting a family with nothing 6 male children.
Answer:
1/8
Step-by-step explanation:
This is actually pretty easy.
First, you have the sample of the children.
You know that the family with 3 children, can only have the following children:
MMM: all males
MMF: 2 males, 1 female
MFF: 1 male, 2 females
MFM: 2 males, 1 female (different order)
FMM: 1 female, 2 males
FFM: 2 females, 1 male
FMF: 2 females, 1 male
FFF: 3 females
If you count all of these possibilities, we have 8 possible cases of family with the childrens.
In only one of them, we have only females and no males, which is the last one, all 3 females.
Therefore, the probability to select a family with no male, is only 1/8.
In the set of all possible sets of genders for three children, which is {MMM, MMF, MFF, FMM, FFM, FMF, MFM, FFF}, the event of having no male children is 'FFF'. As there are 8 possible outcomes in total, the probability of selecting a family with no male children is 1/8, or 0.125.
Explanation:It seems like there is a typo in your question. It asks about the probability of selecting a family with 'nothing 6 male children', which doesn't quite make sense. However, if the question is to find the probability of selecting a family with no male children, we can certainly answer that. In your given set of outcomes, { MMM, MMF, FFM, MFF, FFM, FMF, FFM, FFF }, there seems to be a mistake as FFM is repeated three times. The correct set of equally likely outcomes for a family with three children should be { MMM, MMF, MFF, FMM, FFM, FMF, MFM, FFF }.
Each outcome is equally likely, hence, the probability of any particular outcome is 1 divided by the total number of outcomes. The total unique outcomes for the genders of three children is 2^3, or 8. The event of having no male child corresponds to the outcome 'FFF'. Since there is only one such outcome, the probability of a family with no male children is 1/8 or 0.125.
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Which statement best describes a polygon?
A. a closed plane figure with three or more sides that are straight
B. a closed plane figure with four or more sides
C. an open or closed plane figure
D. an open or closed plane figure with three or more sides Reset Next
The best statement that could be used describe a polygon is that it is a closed plane figure with three or more sides that are straight. Thus, the correct answer is A: a closed plane figure with three or more sides that are straight.
Hope this helps! :)
5:3 =n:7 Solve for n.
(there fractions but i have to write them with : because i cant write fractions)
[tex] \frac{5}{3} = \frac{x}{7} [/tex]
you them cross multiply
5×7=35
3×X= 3x
35=3x
x(n)= 11.6
Answer:
n = 35/3 or 11 2/3.
Step-by-step explanation:
5/3 = n/7
Cross multiply:
3n = 5*7
3n = 35
n = 35/3
The volume of a sphere is increasing at a constant rate of 141 cubic feet per minute. At the instant when the radius of the sphere is 11 feet, what is the rate of change of the radius? The volume of a sphere can be found with the equation V=4/3pi r^3 . Round your answer to three decimal places.
Answer:
0.093 ft/min
Step-by-step explanation:
V = 4/3 π r³
Take derivative with respect to time:
dV/dt = 4π r² dr/dt
Plug in values:
141 = 4π (11)² dr/dt
dr/dt = 141 / (484π)
dr/dt ≈ 0.093
The radius is increasing at 0.093 ft/min.
The increasing rate of the radius is equal to 0.093 ft/min.
What is the volume?Volume is defined as the space occupied by the object in a three-dimensional space. The sphere is the shape of a circular ball.
The volume is calculated by the formula below,
V = 4/3 π r³
Take the derivative with respect to time:
dV/dt = 4π r² dr/dt
Solve the equation for the rate of change of radius of the sphere,
141 = 4π (11)² dr/dt
dr/dt = 141 / (484π)
dr/dt ≈ 0.093
Therefore, the increasing rate of the radius is equal to 0.093 ft/min.
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Rover eats 3/4 of a can of cat food each day and Bono eats 1/2 of a can food each day.Cat food costs $5.00 for three cans.It is only sold in 3 can packs.How much does it cost for a 60 day supply of cat food?
Answer:
It would Cost $125 for a 60 day supply of cat food.
Step-by-step explanation:
Given:
Rover eats cat food each day = [tex]\frac{3}{4}[/tex] = 0.75 can
Bono eats cat food each day = [tex]\frac{1}{2}[/tex] = 0.5 can
Each day consumption for both cats = 0.75+0.5 = 1.25 can
Each day both cats consume = 1.25 cans
For 60 days both cats consume = Number of cans in 60 days.
By Using Unitary method we get;
Number of cans in 60 days = [tex]1.25\times60=75 \ cans[/tex]
Now Cans are sold in a pack of 3.
Hence we will divide number of cans in 60 days with 3 we get;
Number of can packs required for 60 days = [tex]\frac{75}{3}=25 \ can \ packs[/tex]
Now Cost for each Can packs(3 can) = $5.00
Hence Cost for 25 Can packs (75 cans) = Price for 25 can packs(75 can)
By Using Unitary method we get;
Price for 25 can packs (75 cans) = [tex]5\times 25 = \$125[/tex]
Hence Price for 25 can packs (75 cans) which are used for 60 supply of cat food is $125.
Brandon is an amateur marksman. When he takes aim at a particular target on the shooting range, there is a 0.1, point, probability that he will hit it. One day, Brandon decides to attempt to hit 10 such targets in a row.
Assuming that Brandon is equally likely to hit each of the 10 targets, what is the probability that he will hit at least one of them?
Answer:
.65
Step-by-step explanation:
Strategy:
In this situation it is much easier to calculate the probability of the event we are looking for (he hits at least one target) by calculating the probability of its complement (he misses every target), and subtracting from 1.
In other words, we can use this strategy:
P(at least one hit)=1-P(miss all 10)
Calculations:
P(at least one hit)
=1-P(miss all 10)
=1-(0.9)^10
≈1-0.349
≈0.65
Answer:
P(at least one hit)≈0.65
I hope this helps!!!
The probability that Brandon will hit at least one of them is 0.65 approx.
How to find that a given condition can be modeled by binomial distribution?Binomial distributions consists of n independent Bernoulli trials.
Bernoulli trials are those trials which end up randomly either on success (with probability p) or on failures( with probability 1- p = q (say))
Suppose we have random variable X pertaining binomial distribution with parameters n and p, then it is written as
[tex]X \sim B(n,p)[/tex]
The probability that out of n trials, there'd be x successes is given by
[tex]P(X =x) = \: ^nC_xp^x(1-p)^{n-x}[/tex]
For the considered case, as each hit is independent of each other, and there is either hit or not hit, so this situation can be modeled by binomial distribution.
For this case, we get:
n = 10p = probability of success(we call it success if hit occurs) = 0.1X = count of successes in those 10 attemptsThen, we get: [tex]X \sim B(n=10,p=0.1)[/tex]
The probability that Brandon will hit at least one of them is written symbolically as:
[tex]P(X \geq 1)[/tex]
We can rewrite it as:
[tex]P(X \geq 1) = 1 - P(X < 1) = 1 - P(X = 0)[/tex]
Using the probability function of binomial distribution, we get:
[tex]P(X \geq 1) = 1 - \: ^{10}C_0(0.1)^0(1-0.1)^{10} = 1 -0.9^{10} \approx 0.65[/tex]
Thus, the probability that Brandon will hit at least one of them is 0.65 approx.
Learn more about binomial distribution here:
https://brainly.com/question/13609688
A model is made of a car. The car is 3 meters long and the model is 3 centimeters long. What is the ratio of the length of the car to the length of the model? A. 3 : 3 B. 1 : 100 C. 1 : 3 D. 100 : 1
Answer:
D
Step-by-step explanation:
a meter is 100 centimeters so the ratio of the real car to the model is 300 centimeters to 3 centimeters, or 100:1 so D
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Which percent is equivalent to 3/4 ?
A) 25%
B) 50%
C) 60%
D) 75%
Answer:
d is the correct answer
Answer:75
Step-by-step explanation:
Please help me! Picture below
Answer:
A i think
Step-by-step explanation:
Consider the sequence:
5, 7, 11, 19, 35,....
Write an explicit definition that defines the sequence:
Group of answer choices
a_n=2n+3 a n = 2 n + 3
a_n=3n+2 a n = 3 n + 2
a_n=3n^2 a n = 3 n 2
a_n=2^n+3
Answer:
[tex]a_{n}=2^{n}+3[/tex]
Step-by-step explanation:
The given sequence is not arithmetic, it's a geometric sequence, that means the sequence is obtain using powers. The faster way to find the answer is to try options that fist with a geometric sequence. If we try the last one, we'll find that's the answer.
We need to try for n=1, n=2, n=3, n=4 and n=5:
a_{1}=2^{1}+3=5
a_{2}=2^{2}+3=4+3=7
a_{3}=2^{3}+3=8+3=11
a_{4}=2^{4}+3=16+3=19
a_{5}=2^{5}+3=32+3=35
Therefore, the right answer is the last choice, because as you can observe, it fits perfectly with the given sequence.
(x^2–x–4)multiplied by(x–5)
Answer:
x³ -6x² +x +20
Step-by-step explanation:
The distributive property is useful for making sure you have all of the partial products.
(x^2–x–4)(x–5) = x(x^2–x–4) -5(x^2–x–4)
= (x^3 -x^2 -4x) +(-5x^2 +5x +20)
= x^3 +(-1-5)x^2 +(-4+5)x +20
= x^3 -6x^2 +x +20
Recall the equation for a circle with center ( h , k ) and radius r . At what point in the first quadrant does the line with equation y = x + 1 intersect the circle with radius 6 and center (0, 1)?
Answer:
(3√2, 1+3√2) ≈ (4.243, 5.243)
Step-by-step explanation:
The line has a slope of 1 and goes through the center of the circle, so will intersect the circle at the point ...
(6, 6)/√2 +(0, 1) = (3√2, 1+3√2) ≈ (4.243, 5.243)
If a weight hanging on a string of length 5 feet swings through 6° on either side of the vertical, how long is the arc through which the weight moves from one high point to the next high point?\
Answer:
1.047 ft
Step-by-step explanation:
The length of an arc is given by ...
s = rθ
where s is the arc length, r is the radius, and θ is the central angle in radians. Your arc subtends an angle of 12° = (12·π/180) = π/15 radians. The length of the arc is then ...
s = (5 ft)(π/15) = π/3 ft ≈ 1.047 ft
The weight swings through a total angle of 12°, corresponding to an arc length of approximately 1.047 feet on the circumference of the circle with radius 5 feet.
Explanation:To answer this question, we need to understand that the weight swings through an arc, and this arc is a part of the circumference of a circle. Given the length of string (5 feet) is the radius, and the weight swings through 6° on either side of the vertical, we can calculate the total arc length.
Firstly, you should know that the total angle a circle encompasses is 360°. So, the weight swings through a total angle of 6° x 2 = 12°.
Secondly, recall the formula for the circumference of a circle is 2πr, or in our case 2π x 5 feet. Now, to find the length of the arc corresponding to 12°, we will use the proportion of the swing angle to the total angle, i.e., (12/360) x (2π x 5 feet).
In this way, the length of the arc travelled is almost 1.047 feet.
Learn more about Arc Length here:https://brainly.com/question/32035879
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