There are a total of 2^10 = 1024 possible outcomes for a coin flipped 10 times. Out of these, there are only 10 outcomes that have exactly 4 tails and start and end with different faces.
To count the number of outcomes with 4 tails, we can use the binomial coefficient formula: n choose k = n!/(k! * (n-k)!), where n is the total number of flips (10 in this case) and k is the number of tails (4 in this case). This gives us 10 choose 4 = 10!/ (4! * 6!) = 210 outcomes with 4 tails.
To count the number of outcomes that start and end with different faces, we can consider the first and last flips separately. The first flip can be either heads or tails and the last flip can also be either heads or tails, for a total of 2 * 2 = 4 possibilities.
Thus, there are a total of 210 * 4 = 840 outcomes that have exactly 4 tails and start and end with different faces. However, there are two outcomes (THTHTHTHTHT and TTHTHTHTHTH) that are counted twice in this total, so we need to subtract these from the total to get the correct number of outcomes. This gives us 840 - 2 = 838 outcomes.
Finally, we need to subtract the two outcomes that start and end with the same face (HHHHHHHHTH and THHHHHHHHH). This gives us a total of 838 - 2 = 836 outcomes.
Therefore, there are a total of 836 outcomes that have exactly 4 tails and start and end with different faces out of a total of 1024 possible outcomes.
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Leila works mowing lawns and babysitting.She earns $8.80 an hour for mowing and $7.30 and hour and babysitting.How much will she earn for 1 hour of mowing and 5 hours of babysitting?
Answer: $45.3
Step-by-step explanation:
1 hour of mowing: $8.80
5 hours of babysitting: $7.30 x 5 = $36.5
$36.5 + 8.80 = $45.3
$45.3 is your answer.
Answer:
45.30
Step-by-step explanation:
its simple math bro lol
On January 1, 2019, Marblehead, Massachusetts had a population of approximately 19,800 people. On that date, 1,098 Marblehead residents were living with asthma. Between January 1, 2019 and September 1, 2019, there were 495 newly diagnosed cases of asthma in Marblehead. You can assume that the population (19,800) remained constant throughout 2019.
What was the prevalence of asthma in Marblehead on January 1, 2019?
What was the prevalence of asthma in Marblehead on September 1, 2019?
What was the incidence of asthma in Marblehead between January 1, 2019 and September 1, 2019?
Based on the information provided above, it is NOT possible to calculate asthma incidence rate in Marblehead for the year 2018.
The prevalence of asthma on January 1, 2019 is 0.055, the prevalence of asthma on September 1, 2019 is 0.080, the incidence of asthma between January 1 and September 1 is 0.025, there is not possible to calculate asthma incidence rate for the year 2018.
How to calculate prevalence and incidence asthma?Prevalence is the formula to determine the rate of some case based on population. This can be calculated by divide the case by the population.
Incidence rate is same as prevalence in some factor except it only calculate time range and for this case it have same formula which is we can calculate incidence rate by divide the case by the population.
So, for January 1, 2019 is
Prevalence = 1,098 / 19,800
= 0.055
For September 1, 2019 is
Prevalence = (1,098 + new 495) / 19,800
= 1,593 / 19,800
= 0.080
For incidence of asthma between January 1 and September 1 is
Incidence = 495 / 19,800
= 0.025
For 2018 because we are not provided with data for that year so it is impossible to calculate it.
Thus, the prevalence in January 1 is 0.055, September 1 is 0.080, and incidence between January 1 and September 1 is 0.025, and also there is not possible to calculate asthma incidence rat for the year 2018.
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Function A and Function B are linear functions.
Function A
Function B
y=x-1
Which statement is true?
The y-intercept of Function A is greater than the y-intercept of Function B.
The y-intercept of Function A is less than the y-intercept of Function B.
The y-intercept of Function A is greater than the y-intercept of Function B.
What is y-intercept ?
The y intercept of a graph is the point where the graph intersects the y-axis. We know that the x-coordinate of any point on the y-axis is 0. So the x-coordinate of a y-intercept is 0.
Here are the steps to find the y intercept of a function y = f(x),
we just substitute x = 0 in it.solve for y.represent the y-intercept as the point (0, y).Given:
Function A : y=x-1
y-intercept of Function A (x=0) is y = -1
y-intercept of Function B are -6 , -4 and -3.
Since , -1 > -6 , -1 > -4 and -1 > -3
Hence , the y-intercept of Function A is greater than the y-intercept of Function B.
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Can someone please answer this problem for me.
Answer:
$1 per movie
$5.50 per video game
Step-by-step explanation:
We know 5 movies and 2 video games cost $16 and 3 movies and 8 video games cost $47.
Let x be the cost of 1 movie and y be the cost of a video game.
5x + 2y = 16
3x + 8y = 47
In the first equation, lets solve for y
2y = 16 - 5x
y = 8 - 2.5x
Now, we can substitute this into the other equation.
3x + 8(8 - 2.5x) = 47
3x + 64 - 20x = 47
-17 x = - 17
x = 1
So a movie costs $1 to rent.
2y = 16 - 5(1)
2y = 11
y = 5.5
A video game costs $5.50 to rent.
Suppose the COMBINED area is known to be 0.10416, assume there is equal area on each side. Determine the corresponding Z-scores.A) z=±1.62 B) z=±1.58 C) z=±1.72 D) z=±1.66 E) z=±1.69 F) z=±1.49 G) None of These
An combined area of 0.10416 to the right means that it must have an area of 0.90 to the left, so the answer is again 1.28.
Every normally distributed random variable has a slightly different distribution shape, the only way to find areas using a table is to standardize the variable - transform our variable so it has a mean of 0 and a standard deviation of 1. How do we do that? Use the z-score!
Z = ( x - μ)/σ
if the random variable X has a mean μ and standard deviation σ,
then transforming X using the z-score creates a random variable with mean 0 and standard deviation 1!
With that in mind, we just need to learn how to find areas under the standard normal curve, which can then be applied to any normally distributed random variable.
An area of 0.10416 to the right means that it must have an area of 0.90 to the left, so the answer is again 1.28.
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Every normally distributed random variable has a slightly different distribution shape, the only way to find areas using a table is to standardize the variable - transform our variable so it has a mean of 0 and a standard deviation of 1. How do we do that? Use the z-score!
Z = ( x - μ)/σ
if the random variable X has a mean μ and standard deviation σ,
An area of 0.10416 to the right means that it must have an area of 0.90 to the left, so the answer is again 1.28.
assume that the maximum speed your car will go is a linear function of the steepness of the hill is going up or down. SUppose the car can go a maximum of 55 mph up a 5 hill and a maximum of 104 down a 2 hill
The maximum speed of the linear function is y = -7x + 90
Assume that the maximum speed your car will go is a linear function of the steepness of the hill is going up or down?a. we have two points connecting (speed, degree) are (+5,55) and (-2,104) representing (x₁ , y₁) and (x₂, y₂)
Slope = (y₂ - y₁) / (x₂ - x₁)
slope = (104-55) / (-2-5) = 49/-7 = -7 mph/1°
speed = slope x (degree) + b
Solve 'b':
55 = -7 x (5) + b
55 = -35 + b
b = 55 + 35
b = 90
y₁ = -7x₁ + 90
b) What does the speed-intercept equal and what does it represent?
The speed is 90 mph when there is no hill.
c ) What does the degree of steepness-intercept and what does it represent?
Up the hill, the steepness is roughly 12.9 degrees at its maximum. Whenever there is a slope, the car will not move.
d) Interpret the slope in words.
The speed drops by 7 mph for every 1 degree that the hill's steepness increases.
e) If your top speed is 83 mph, how steep is the hill? Be sure to include whether the direction is up or down.
83 = -7 x + 90
83 -90 = -7x
-7 = -7x
x = 1° up the hill
f) How fast could you go down a 7º hill?
y = -7 (-7) + 90
y = 139 mph
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Determine which of the lines, if any, are parallel or perpendicular. Explain.
6. Line a passes through (0, 4) and (4, 3).
Line b passes through (0, 1) and (4, 0).
Line c passes through (2, 0) and (4, 4).
Answer:
Step-by-step explanation:
c 0,4 .01
In Jimmy's class 1/3 of the pupils have blue eyes and 2/5 have brown eyes. What fraction of the class do not have blue or brown eyes?
Answer:
4/15
Step-by-step explanation:
1/3 x 5/5 = 5/15, 2/5 x3/3 = 6/15
5/15+6/15= 11/15
15/15- 11/15= 4/15
so 4/15 people don't have neither blue nor brown eyes.
6. ______ is the transfer of energy by electromagnetic waves.
a.Convection b.Radiation. c.Conduction. d.Contact
karla is offered a job as parking lot attendant. the job will pay 2400 per month, paid biweekly. along with the base salary, the company offers to pay half the cost of medical insurance and will match karlas contribution to a retirment plan up to a total of 1500. if the full cost of the medical insurance is 450 a month and karla plans to contribute the full 1500 every year tpa retirement plan, what is the actual annual value of this job to karla?
The actual annual value of this job to Karla is 33000.
What are arithmetic operations?
Arithmetic operations is a branch of mathematics that studies numbers and the operations on numbers that are useful in all other branches of mathematics. It consists primarily of operations like addition, subtraction, multiplication, and division.
We have,
the job will pay 2400 per month,
if the full cost of the medical insurance is 450 a month and Karla plans to contribute the full 1500 every year tpa retirement plan,
the actual annual value of this job to Karla is:
2400 per month
annual value = 2400 * 12 = 28,800
the medical insurance is 450 a month
half the cost of medical insurance is 225 a month
annual value = 225 * 12 = 2700
the full 1500 every year tpa retirement plan,
So, the total value is:
= 28,800 + 2700 + 1500
= 33000
Hence, the actual annual value of this job to Karla is 33000.
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Are y = 6 and x = - 1 perpendicular lines?
answer: yes.
since y = 6 and x = -1 are parallel to the y and x axis, respectively, they hit each other at a 90° angle when graphed, making a plus sign. they are perpendicular lines.
What type of number is -560,114?
Choose all answers that apply:
A Whole number
B
C
D
Integer
Rational
Irrational
Answer:
It is an integer.
It is rational.
Step-by-step explanation:
A whole number is in the set
0, 1, 2, 3...
This set starts at zero and only includes zero and the positive numbers. So the given number is NOT a whole number.
It IS an integer. Integers include positive and negative numbers. That is, whole numbers and their opposites.
The number IS rational. That is, it can be written as a ratio:
-560114/1
Since it is rational, it is not irrational.
which equal to cos 74
Answer:
0.27563735723563.
Step-by-step explanation:
74 is an acute angle since it is less than 90° cos (74) = 0.27563735723563. Write cos (74) in terms of sin Since 74° is less than 90, we can express this in terms of a cofunction.
5k^2+20k-25=0
please i need help
The value of k is 1 and -5.
What is factorization?
A number or other mathematical object is factorized or factored when it is written as the product of numerous factors, typically smaller or simpler things of the same kind.
Here, we have
Given function: 5k²+20k-25 = 0
Now, we factorize the given function and we get
5k²+20k-25 = 0
5(k²+4k-5) = 0
k² + 4k - 5 = 0
k² + 5k - k -5 = 0
k(k+5) -1(k+5) = 0
(k+5)(k-1) = 0
k+5 = 0, k-1 = 0
k = -5, k = 1
Hence, The value of k is 1 and -5.
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determine the z transform for each of the following sequences. sketch the pole-zero plot and indicate the region of convergence. indicate whether or not the (discrete time) fourier transform of the sequence exists.
The Fourier transform of this sequence does not exist
What is Fourier Transform?
The output of a Fourier transform is a function of frequency and is a mathematical transformation that breaks down functions into frequency components.
To determine the z-transform of a given sequence, we need to find the sum of the sequence's terms multiplied by z raised to the negative of the term's position. For example, given a sequence x[n], the z-transform X(z) is given by:
[tex]X(z) = sum_{n=-infinity}^{infinity} x[n] * z^{-n}[/tex]
To sketch the pole-zero plot of a z-transform, we need to plot the poles (values of z where the z-transform is infinite) and zeros (values of z where the z-transform is zero) in the complex plane. The region of convergence (ROC) is the set of values of z for which the sum defining the z-transform converges.
[tex]x[n] = a^n u[n][/tex], where a is a constant and u[n] is the unit step function[tex](u[n] = 1 for n > = 0[/tex] and [tex]u[n] = 0 for n < 0)[/tex]
The z-transform of this sequence is given by:
[tex]X(z) = sum_{n=0}^{infinity} a^n * z^{-n}= 1 / (1 - a*z^{-1})[/tex]
This z-transform has a pole at z = 1/a and a zero at z = 0. The pole-zero plot consists of a single pole at 1/a in the complex plane. The ROC is the set of values of z such that [tex]|a*z^{-1}| < 1[/tex], which is the region inside the unit circle centered at the origin. The Fourier transform of this sequence exists.
[tex]x[n] = (-1)^n u[n].[/tex]
The z-transform of this sequence is given by:
[tex]X(z) = sum_{n=0}^{infinity} (-1)^n * z^{-n}= 1 / (1 + z^{-1})[/tex]
This z-transform has a pole at z = -1 and a zero at z = 0. The pole-zero plot consists of a single pole at -1 in the complex plane. The ROC is the set of values of z such that [tex]|z^{-1}| < 1[/tex], which is the region inside the unit circle centered at the origin. The Fourier transform of this sequence exists.
[tex]x[n] = n^2 u[n].[/tex]
The z-transform of this sequence is given by:
[tex]X(z) = sum_{n=0}^{infinity} n^2 * z^{-n}= z^{-2} / (1 - z^{-1})^3[/tex]
This z-transform has poles at z = 1, z = 1, and z = 1. The pole-zero plot consists of three poles at the origin in the complex plane. The ROC is the set of values of z such that [tex]|z^{-1}| > 1[/tex], which is the region outside the unit circle centered at the origin.
Hence, The Fourier transform of this sequence does not exist.
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From her eye, which stands 1.75 meters above the ground, Myesha measures the angle of elevation to the top of a prominent skyscraper to be 19^{\circ}
∘
. If she is standing at a horizontal distance of 337 meters from the base of the skyscraper, what is the height of the skyscraper? Round your answer to the nearest hundredth of a meter if necessary
Answer:
117.79 m
Step-by-step explanation:
You have an observer 337 m from a skyscraper who measures the angle of elevation from a point 1.75 m above the ground to be 19°. You want to know the height of the skyscraper.
TangentThe tangent relation tells you ...
Tan = Opposite/Adjacent
Solving for the side opposite the angle, we get ...
Opposite = Adjacent · Tan
ApplicationIn this scenario, the height of the building above the eye height is ...
height above eyes = (337 m)(tan 19°) = 116.038 m
Then the height of the building is ...
skyscraper height = eye height + height above eyes
skyscraper height = 1.75 m + 116.038 m = 117.788 m
The height of the skyscraper is about 117.79 meters.
Which of the following expressions has the leftmost value on the number line?
A.-7-10 O
B. 7-10
C.10-(-7)
D.10-7
Answer:
A.-7-100. [Since it is -107]
What does MW equal or mean
The value of MW in the given figure is 5.
What is meant by an angle?In Euclidean geometry, an angle is a figure made up of two rays that have a shared vertex, also known as a common terminus, and are referred to as the angle's sides. The angles of two rays are situated in the plane containing the rays. An angle is also created when two planes intersect at an angle. These are referred to as dihedral angles. Another technique to define two curves is to specify the angle generated by rays that are tangent to the intersection of two curves. Angle is another word for how long a rotation or angle is.
Given,
In the figure,
PM=MW
It means PM is similar to MW
As given in the figure,
PM=5
Since PM is similar to MW
Then,
MW=5
Therefore, the value of MW in the given figure is 5.
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After his annual review, Miguel's salary was increased from $32,000 per year to $35,000. What percent increase does this represent? Round your answer to the nearest tenth of a percent.
Answer:
91.4%
Step-by-step explanation:
First do: 32,000/35,000 = X/100
Then multiply 32,000 by 100 which is 3,200,000
Then divide 3,200,000 by 35,000
You will get 91.42857142857143
A sector with central angle theta is cut froma circle of radius 10 inches and the edges of the secotr are brought toegether to ormnr a cone find the amgnitude of theta such that thte volume of the conbe is a maximum
So, the maximum volume of the cone is approximately 1047.19 cubic inches.
The volume of a cone is given by the formula V = (1/3) * pi * r^2 * h, where r is the radius of the base and h is the height of the cone. In this case, the height of the cone is the radius of the circle, which is 10 inches, and the radius of the base is half the length of the circumference of the sector, which is (theta/360) * 2 * pi * 10 inches.
We want to find the value of theta that maximizes the volume of the cone. We can do this by taking the derivative of the volume formula with respect to theta, setting it equal to 0, and solving for theta.
V = (1/3) * pi * r^2 * h
= (1/3) * pi * ((theta/360) * 2 * pi * 10)^2 * 10
= (1/3) * pi * (theta/36)^2 * 100
dV/dtheta = (2/3) * pi * (theta/36) * (100/36)
= (2/3) * pi * theta/36
Setting dV/dtheta = 0 and solving for theta, we get theta = 0.
Since the magnitude of theta must be positive, the maximum volume occurs when theta = 0, which means that the entire circle is used to form the cone. The maximum volume of the cone is then
V = (1/3) * pi * r^2 * h
= (1/3) * pi * (10)^2 * 10
= (1/3) * pi * 100 * 10
= (1/3) * pi * 1000
= approximately 1047.19 cubic inches
So, the maximum volume of the cone is approximately 1047.19 cubic inches.
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We want to find the value of theta that maximizes the volume of the cone. We can do this by taking the derivative of the volume formula with respect to theta, setting it equal to 0, and solving for theta.
V = (1/3) * pi * r^2 * h
= (1/3) * pi * ((theta/360) * 2 * pi * 10)^2 * 10
= (1/3) * pi * (theta/36)^2 * 100
dV/dtheta = (2/3) * pi * (theta/36) * (100/36)
= (2/3) * pi * theta/36
Setting dV/dtheta = 0 and solving for theta, we get theta = 0.
Since the magnitude of theta must be positive, the maximum volume occurs when theta = 0, which means that the entire circle is used to form the cone. The maximum volume of the cone is then
V = (1/3) * pi * r^2 * h
= (1/3) * pi * (10)^2 * 10
= (1/3) * pi * 100 * 10
= (1/3) * pi * 1000
= approximately 1047.19 cubic inches
So, the maximum volume of the cone is approximately 1047.19 cubic inches.
Find the greatest possible error :19oz
Answer:
0.5 oz
Step-by-step explanation:
You want the greatest possible error associated with the measurement 19 oz.
Measurement errorThe possible error is generally considered to be half the place value of least-significant digit. Here, the least significant digit has a place value of units, so the greatest error is 1/2 unit, or 0.5 ounces.
__
Additional comment
We know that values of 18.5 oz up to 19.4999... oz will round to 19 oz. That is why the greatest error is considered to be 0.5 oz.
In practice, there can be some difficulty associated with knowing that a value is 18.5 instead of 18.49. Hence real-world error may actually be slightly larger than 0.5 oz. In math, we ignore that case.
A cruise ship traveled to Madagascar and
back. On the trip there it traveled 12 km/h
and on the return trip it went 18 km/h.
How long did the trip there take if the
return trip took six hours?
A) 12 hours
C) 9 hours
B) 10 hours
D) 7 hours
To find the time it took the cruise ship to travel to Madagascar, we need to use the formula for distance, which is distance = speed x time. We are given the distance and the speed of the ship on the trip there, so we can solve for the time by dividing the distance by the speed:
time = distance / speed
We are told that the distance of the trip there was the same as the distance of the return trip, which took 6 hours. We are also told that the ship traveled 12 km/h on the trip there, so the distance of the trip there was 12 km/h x 6 h = 72 km.
Now we can plug this information into the formula to solve for the time:
time = 72 km / 12 km/h = <<72/12=6>>6 hours
Therefore, it took the cruise ship 6 hours to travel to Madagascar. The correct answer is therefore (A) 12 hours.
PLEASE HELP!! I will mark Brainliest
Compare these numbers.
>
<
=
none of the above
The terminal side of an angle θ in standard position intersects the unit circle at (√30/7,-√19/7). What is cot(θ)?
The cotangent of the angle is -√570/30
How to determine the cotangent of the angle?From the question, we have the following parameters that can be used in our computation:
(√30/7,-√19/7)
This means that
(x, y) = (√30/7,-√19/7)
The cot(θ) is calculated as
cot(θ) = y/x
Substitute the known values in the above equation, so, we have the following representation
cot(θ) = (-√19/7)/(√30/7)
Evaluate
cot(θ) = -√19/√30
Rationalize
cot(θ) = -√570/30
Hence, the value of cot(θ) is -√570/30
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What is the y/x ratio
The angles whose measure are greater than the measure of ∠1 are ∠2, ∠3, ∠7, ∠5 .
What is the general equation of a straight line?The general equation of a straight line is -
y = mx + cwhere -
[m] : slope[c] : y - interceptGiven is a graph as shown in the image.
The ratio of {y/x} is called the slope of a line. So, we can write -
m = 3/2
m = 1.5
Therefore, the ratio of [y] by [x] is equivalent to 1.5.
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A train travelling along a straight line with constant acceleration is observed to travel consecutive distances of 1km in times of 30s and 60s respectively. Find the initial velocity of the train.
Answer:
116.7m/s
Step-by-step explanation:
distance(s) = 1km = 1 × 1000m = 1000m
Time(t) = 60– 30 = 30s
initial velocity = u
acceleration (a) = 10m/s
using the formula
S = ut + ½at²
1000 = 30u + ½ × 10 × 30²
1000 = 30u + 5 × 900
1000 = 30u + 4500
30u = 4500 – 1000
30u = 3500
divide both sides by 30
u = 116.7m/s
i hope i helped
What is the equation of a horizontal line through (0, -1)?
Choose one 4 points
Oy=0
Ox=0
O y = -1
O x=11
Answer:
(c) y = -1
Step-by-step explanation:
You want the equation of the horizontal line through (0, -1).
Horizontal lineA horizontal line has the same y-value for every x-value. Its equation is ...
y = constant
ApplicationIf you want the line to go through a point with a y-coordinate of -1, then the constant must be -1.
y = -1 . . . . . . . horizontal line through (0, -1)
Question 1 of 9
Use the scale to help you solve the equation and find the value of x. Enter the
value of x below. x+8=10
Answer: x + 8 - 8 = 10 - 8
Simplifying the left side of the equation gives us:
x = 2
Therefore, the value of x in this equation is 2.
Colette bought 1/4 of a pound of green grapes and 1/8 of a pound of red grapes. How much more did the green grapes weigh than the red grapes?
The green grapes weigh 0.125 pounds more than the red grapes.
Step-by-step explanation:1/4 of a pound = 0.25 pounds
1/8 of a pound = 0.125 pounds
0.25 - 0.125 = 0.125 pounds
Hope this helps :)