Let x be the price of one donut and y be the price of one kolache. Then we have:
6x + 2y = 8.84 4x + y = 5.36
We can solve for y by multiplying the second equation by -2 and adding it to the first equation:
6x + 2y = 8.84 -8x - 2y = -10.72
-2x = -1.88
Dividing both sides by -2, we get:
x = 0.94
This means that one donut costs $0.94
11. a bird makes a dive off a cliff to catch a fish in a lake. the path of the dive follows a
parabolic curve of the given function f(x) = (x-7)2 - 1 where f(x) represents the height of
the bird in meters, and x represents the time in seconds. how far was the fish from the bird?
The fish has located a horizontal distance of 7 meters away from the cliff.
How to find the distance between the bird and the fish?
To find the distance between the bird and the fish, we need to find the horizontal distance traveled by the bird during the dive. We can do this by finding the x-coordinate of the vertex of the parabolic curve, which represents the highest point of the dive.
The vertex of the parabolic curve of the given function f(x) = (x-7)^2 - 1 is at the point (7, -1). This means that the highest point of the bird's dive is reached at 7 seconds, and the bird is at a height of -1 meters at this point.
To find the distance traveled by the bird during the dive, we need to find the horizontal distance between the bird's starting point (the cliff) and the highest point of the dive (the vertex). The distance is given by the horizontal coordinate of the vertex, which is 7 seconds.
Therefore, the fish has located a horizontal distance of 7 meters away from the cliff, assuming that the bird started the dive from the edge of the cliff.
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The 15th question pls
The solution to the system of linear equations is x = 1, y = -3, and z = 8, which is option B: X=-1, y=-3, z=2.
How did we get the values?To solve this system of linear equations, we can use Gaussian elimination, which involves adding and subtracting equations to eliminate variables. Here are the steps:
x - 3y - 2z = 6
2x - 4y - 3z = 8
-3x + 6y + 8z = -5
Step 1: Add twice the first equation to the second equation to eliminate x:
x - 3y - 2z = 6
4y + z = 20
-3x + 6y + 8z = -5
Step 2: Add three times the first equation to the third equation to eliminate x:
x - 3y - 2z = 6
4y + z = 20
9y + 2z = 13
Step 3: Solve for z in the second equation:
4y + z = 20
z = 20 - 4y
Step 4: Substitute z into the third equation and solve for y:
9y + 2z = 13
9y + 2(20 - 4y) = 13
y = -3
Step 5: Substitute y into the second equation and solve for z:
4y + z = 20
4(-3) + z = 20
z = 8
Step 6: Substitute y and z into the first equation and solve for x:
x - 3y - 2z = 6
x - 3(-3) - 2(8) = 6
x = 1
Therefore, the solution to the system of linear equations is x = 1, y = -3, and z = 8, which is option B: X=-1, y=-3, z=2.
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The text format of the question in the picture:
15. The solution the system of linear equation of
x-3y-2z = 6
2x-4y-3z = 8
(-3x+6y+8z = -5 is
A) X=-1,y=-3, z=-2 B) X=-1,y=-3, z=2 C) X=1,y=-3, z=2 D) X = 1, y = 3, z=-2
h(x)=|2x|-8 domain and range
For the function "h(x) = |2x| - 8", the domain is (-∞, ∞) and the range is [-8, ∞).
The function h(x) = |2x| - 8 is defined for all real numbers x, so the domain of h(x) is the set of all real-numbers, or (-∞, ∞).
To find the range of the function, we determine set of all possible output values of function. Since the function involves the absolute value of 2x, the output can never be less than -8.
When "2x" is positive, |2x| = 2x. When 2x is negative, |2x| = -2x. This means that the function h(x) will have two branches depending on whether 2x is positive or negative.
⇒ When 2x is positive, h(x) = |2x| - 8 = 2x - 8. This branch of the function will have all non-negative values.
⇒ When 2x is negative, h(x) = |2x| - 8 = -2x - 8. This branch of the function will have all non-positive values.
Combining the two , we get the range of the function h(x) as [-8, ∞).
Therefore, the domain of h(x) is (-∞, ∞) and the range of h(x) is [-8, ∞).
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Let and be two ordered bases of , and consider a linear transformation. Suppose that the change of base matrix is given by and the coordinate matrix of with respect to is given by use this to determine coordinate matrix of with respect to.
The coordinate matrix of the linear transformation with respect to the second ordered basis is found by multiplying the change of basis matrix by the coordinate matrix of the linear transformation with respect to the first ordered basis is [tex]\left[\begin{array}{cc}0&2/5\\1&-1/5\end{array}\right][/tex]
Let V be a vector space with two ordered bases B and B', and let T be a linear transformation from V to V. Suppose that the change of basis matrix from B to B' is P, and the coordinate matrix of T with respect to B is A.
To find the coordinate matrix of T with respect to B', we can use the formula
A' = P⁻¹AP
where A' is the coordinate matrix of T with respect to B'.
To use this formula, we need to find the inverse of P. If P is invertible, then we have
P⁻¹ = 1/det(P) * adj(P)
where det(P) is the determinant of P and adj(P) is the adjugate of P.
Assuming that P is invertible, we can compute its inverse as follows
det(P) = 1*(-2) - 2*2 = -5
adj(P) =[tex]\left[\begin{array}{cc}-2&2\\-2&1\end{array}\right][/tex]
So, P⁻¹ = (-1/5)*[tex]\left[\begin{array}{cc}-2&2\\-2&1\end{array}\right][/tex] = [tex]\left[\begin{array}{cc}2/5&-2/5\\2/5&-1/5\end{array}\right][/tex]
Now, we can use the formula to find the coordinate matrix of T with respect to B'
A' = P⁻¹AP = *[tex]\left[\begin{array}{cc}-2&1\\-1&0\end{array}\right][/tex]*[tex]\left[\begin{array}{cc}-1&2\\2&1\end{array}\right][/tex]= [tex]\left[\begin{array}{cc}0&2/5\\1&-1/5\end{array}\right][/tex]
Therefore, the coordinate matrix of T with respect to B' is
[tex]\left[\begin{array}{cc}0&2/5\\1&-1/5\end{array}\right][/tex]
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--The given question is incomplete, the complete question is given
" Using change of base matrices to find coordinate matrices of linear transformations Let B and C be two ordered bases of R2, and consider a linear transformation T: R2 + R2. Suppose that the change of base matrix Ic, B is given by [0 -2 3 3] and the coordinate matrix Tc,c of T with respect to C is given by [ -1 -1 2 -1] Use this to determine coordinate matrix TB,B of T with respect to B. TB,B ? "--
The line plot shows the ages of participants in the middle school play
Determine the appropriate measures of center and variation
The appropriate measures of center and variation are 13 and 4.
Measures of Center:
The appropriate measure of center for this data set is the median since there is no clear outlier present in the data. Hence, the value of median here is 13
Measures of Variation:
The appropriate measure of variation for this dataset is the range, which is the difference between the largest and smallest value in the dataset, Hence the value of range is 4
Since the data is small and there is no clear outlier present, the median is the appropriate measure of center. The range, which is the difference between the largest and smallest value in the dataset, is the appropriate measure of variation
Hence, the appropriate measures of center and variation are 13 and 4.
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Solve the following quadratic function by utilizing the square root method. Y=xsquared minus nine
The solution of the quadratic equation is y = (x + 3)(x - 3).
What is the solution of the quadratic equation?The solution of the quadratic equation is calculated by applying difference of two squares as shown below;
y = x² - 9
y = x² - 3²
the difference of two square of x² - 3² = (x + 3)(x - 3)
The solution of the quadratic equation is calculated as;
y = (x + 3)(x - 3)
Thus, solution of the quadratic equation has been determined using square root method.
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How many outcomes are there in a 5 digit license plate if the first 2 digits must be letters and the last 3 digits are numbers?
The letters and numbers can be repeated.
100
B 260
676,000
D 1,757,600
As part of an exercise regimen, the probability of a person running outside is 0.45, the probability of a person joining a gym is 0.40, and the probability of a person both running outside and joining a gym is 0.25. what is the probability that a person either runs or joins a gym?
The probability that a person either runs outside or joins a gym is 0.60 or 60%.
To find the probability that a person either runs outside or joins a gym, you can use the formula:
P(A or B) = P(A) + P(B) - P(A and B)
where A is the event of running outside, B is the event of joining a gym, and "and" represents the intersection of both events.
Given:
P(running outside) = 0.45
P(joining a gym) = 0.40
P(both running outside and joining a gym) = 0.25
Plug these values into the formula:
P(either runs or joins a gym) = 0.45 + 0.40 - 0.25
Calculate the result:
P(either runs or joins a gym) = 0.60
Therefore, the 60% of person either runs outside or joins a gym
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Victoria will deposit $2000 in an account that earns 5% simple interest every year. Her friend Corbin will deposit $1800 in an account that earns 9% interest compounded annually. The deposits are made on the same day, and no additional money will be deposited or withdrawn from the accounts. Which statement about the balances of Victoria and Corbin's accounts at the end of 3 years is true?
Corbin's account will have a higher balance than Victoria's account at the end of 3 years" is true.
How to calculate account balance at the end of 3 years?To calculate the balance at the end of 3 years, we can use the simple interest formula for Victoria's account and the compound interest formula for Corbin's account.
For Victoria's account:
Simple interest = P * r * t
= 2000 * 0.05 * 3
= $300
Balance after 3 years = P + Simple interest
= 2000 + 300
= $2300
For Corbin's account:
Balance after 3 years = [tex]P * (1 + r)^t[/tex]
= 1800 * (1 + 0.09)³
= $2401.40
Therefore, the statement "Corbin's account will have a higher balance than Victoria's account at the end of 3 years" is true.
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Volume of a sphere with a radius of 41
Answer:
Volume = 288695.6 in³
Step-by-step explanation:
Volume of a sphere is given by
v=4/3πr^3
Where r is the radius of the sphere
From the question
radius = 41 in
Substitute the value into the above formula
We have
v=4/3 x 41^3π
=275684/3 π
= 288695.6097
We have the final answer as
Volume = 288695.6 in³ to the nearest tenth
Volume = 288695.6 in³ to the nearest tenth
Hope this helps you
PLS MARK BRAINLIEST
4 Gabriela is building a wooden box with a rectangular base that is 18 in. By 15 in.
and is 15 in. Tall.
Part A
If she wants an open box without a top, how much wood will Gabriela use?
Strow your work
Gabriela will use 1620 square inches of wood to build the open box.
The amount of wood Gabriela will use depends on the surface area of the box, which is the sum of the areas of its six faces. Since the box is open on top, it will have five faces: four sides and a bottom.
The area of the bottom is the area of a rectangle with length 18 in. and width 15 in., which is:
Area of bottom = length x width = 18 in. x 15 in. = 270 in²
The area of each side is the product of the height and the length of the corresponding base, which is:
Area of each side = height x length = 15 in. x 18 in. = 270 in²
So the total surface area of the box is:
Total surface area = 2 x (Area of bottom) + 4 x (Area of each side)
= 2 x 270 in² + 4 x 270 in²
= 1620 in²
Therefore, Gabriela will use 1620 square inches of wood to build the open box.
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A cone has a radius of 3 inches and a slant height of 12 inches.
What is the exact surface area of a similar cone whose radius is 9 inches?
The surface area of the similar cone is 415.8 in²
What is surface area of a cone?A cone is a shape formed by using a set of line segments or the lines which connects a common point, called the apex or vertex.
The surface area of a cone is expressed as;
SA = πr( r+l) where r is the radius and l is the slant height.
The slant height of the original cone =
l= √h²+r²
l = √12²+3²
l = √144+9
l = √153
l = 12.4 in
SA= 3π( 3+12.4)
SA = 3 × 15.4
SA = 46.2 in²
The surface area of similar cone with radius 9 inches is calculated by;
(3/9)² = 46.2/x
= 9/81 = 46.2/x
x = 46.2 × 81/9
x = 415.8in²
Therefore the surface area of the similar cone is 415.8 in³
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What is the perimeter of the triangle?
?? units.
Answer:
36 units
Step-by-step explanation:
You want to know the perimeter of the right triangle with leg lengths 9 units and 12 units.
PerimeterThe perimeter of the triangle is the sum of the lengths of its sides. We can count squares to find the lengths of the horizontal and vertical legs. The length of the hypotenuse can be found using the Pythagorean theorem:
c² = a² +b²
c² = 9² +12² = 81 +144 = 225
c = √225 = 15 . . . . length of the hypotenuse
Then the perimeter is ...
P = a +b +c = 9 +12 +15 = 36 . . . units
The perimeter of the triangle is 36 units.
__
Additional comment
The leg lengths have the ratio 9:12 = 3:4, telling you this is a 3:4:5 right triangle. This means you know the side lengths are 3:4:5 = 9:12:15, and their sum is 9+12+15 = 36.
It is handy to memorize a few of the Pythagorean triples that often show up in algebra, trig, and geometry problems: {3, 4, 5}, {5, 12, 13}, {7, 24, 25}, {8, 15, 17}.
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The human gestation times have a mean of about 266 days, with a standard deviation of about 10 days. Suppose we took the average
gestation times for a sample of 100 women.
days
Where would the center of the histogram be?
What would the standard deviation of that histogram?
My sample shows a mean of 264. 8 days. What is my z-score?
days (Round to the thousandth place)
My sample shows a mean of 264. 8 days. What is my z-score?
(Round to the tenth place)
The z-score is -1.2, rounded to the tenths place.
The center of the histogram would be around the population mean of 266 days.
The standard deviation of the histogram would be the standard error of the mean, which is the standard deviation of the population divided by the square root of the sample size. Thus, the standard deviation of the histogram would be 10 / sqrt(100) = 1 day.
To calculate the z-score for a sample mean of 264.8 days, we can use the formula:
z = (sample mean - population mean) / (standard deviation / sqrt(sample size))
Substituting the given values, we get:
z = (264.8 - 266) / (10 / sqrt(100)) = -1.2
Therefore, the z-score is -1.2, rounded to the tenths place.
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See image for the work
The number of horizontal rails for 10 sections is
60The rule for the post is to multiply the number of section by 3
The rule for the rail is to multiply the post by 2
How to find the rulesThe rules is calculated using the unit value and comparing with other values
the rule for the number of post
1 section requires 3 posts hence multiplication by 3, comparing shows that multiplying by 3 gives the number of post
the rule for the number of rails
1 section requires 6 rails hence multiplication by 6, comparing shows that multiplying each section by 6 gives the correponding number of rails
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ASAP PLEASE HELP!!
I’ll give brianest
Given that the length of arc DC is 9. 77 inches and the radius of the circle is 8 inches.
to the nearest degree, what is the mZDPC?
The mZDPC is approximately 15 degrees.
How we find the mZDPC?We know that the length of an arc of a circle is given by the formula:
length of arc = (central angle / 360°) × 2πr
where r is the radius of the circle.
In this case, the length of arc DC is 9.77 inches and the radius of the circle is 8 inches. Let's use the above formula to find the central angle mZDPC:
9.77 = (mZDPC / 360°) × 2π(8)
Simplifying this equation, we get:
mZDPC = (9.77 / (2π(8) / 360°))
mZDPC = (9.77 / 0.670206) degrees
mZDPC ≈ 14.58 degrees
Rounding to the nearest degree, we get:
mZDPC ≈ 15 degrees
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Find the side x, giving answer to 1 decimal place
Answer:
Set your calculator to degree mode.
Using the Law of Sines:
7/sin(40°) = x/sin(81°)
x = 7sin(81°)/sin(40°) = 10.8
Answer:
10.8=x
Step-by-step explanation:
Using the Law of Sines, we can put together the fact that
[tex]\frac{sin A}{a} =\frac{sinB}{b}[/tex]
Substitute our given values from the triangle:
[tex]\frac{sin 81}{x} =\frac{sin40}{7}[/tex]
Turn the sines into a decimal:
[tex]\frac{0.9876}{x} =\frac{0.6427}{7}\\[/tex]
cross multiply using butterfly method
0.988·7=0.643x
solve for x
6.916=0.643x
divide both sides by 0.643
10.8=x (round to nearest tenth)
Hope this helps! :)
PLEASE ANSWER!!! FOR BRAINLY!!! ASAP!!
A system of linear equations is shown on the graph.
The graph shows a line that passes through negative 10 comma 10, negative 5 comma 9, and 0 comma 8. The graph also shows another line that passes through negative 8 comma 12, negative 5 comma 9, and 0 comma 4.
What is the solution to the system of equations?
A There are infinitely many solutions.
B There is no solution.
C There is one unique solution (−5, 9).
D There is one unique solution (0, 8).
Answer:
(-1/5)x + 8 = -x + 4
(4/5)x + 8 = 4
(4/5)x = -4
x = -5, so y = 9
C. There is one unique solution (-5, 9).
During the first year with a company, Finley was paid an annual salary of $56,000, with a 6% raise for each following year. Which equation represents Finley's annual salary, f (n), during the nth year?
f (n) = 56,000(0.94n)
f (n) = 56,000(1.06n)
f (n) = 56,000(0.06n – 1)
f (n) = 56,000(1.06n – 1)
The correct equation that represents Finley's annual salary, f(n), during the nth year is: [tex]f(n) = 56,000(1.06)^(n-1)[/tex] Thus, option D is correct.
What is an equation?
Finley's annual salary increases by 6% each year. This means that the salary for the second year is 6% more than the salary for the first year, the salary for the third year is 6% more than the salary for the second year, and so on.
To find an equation for Finley's annual salary during the nth year, we can use the initial salary of $[tex]56,000[/tex] and the fact that the salary increases by 6% each year. One way to write this equation is:
[tex]f(n) = 56,000(1.06)^(n-1)[/tex]
Here, the expression (1.06)^(n-1) represents the 6% increase in salary each year, starting from the second year (hence the (n-1) exponent). Multiplying this by the initial salary of $56,000 gives the salary for the nth year.
Therefore, the correct equation that represents Finley's annual salary, f(n), during the nth year is:[tex]f(n) = 56,000(1.06)^(n-1)[/tex]
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A random sample of 155 observations results in 62 successes. [You may find it useful to reference the z table.]a. Construct the a 90% confidence interval for the population proportion of successes. (Round intermediate calculations to at least 4 decimal places. Round "z" value and final answers to 3 decimal places.)b. Construct the a 90% confidence interval for the population proportion of failures. (Round intermediate calculations to at least 4 decimal places. Round "z" value and final answers to 3 decimal places.)
For a random sample of 155 observations results in 62 successes.
a) A 90% confidence interval for the population proportion of successes is equals to the (0.335 , 0.465).
b) A 90% confidence interval for the population proportion of failure is equals to the (0.535 , 0.665).
We have a random sample of 155 observations results in 62 successes. So,
Observed value, x = 62
Sample size,n = 155
Population Proportion, p = x/n
= 62/155
= 0.4
a) We have to determine 90% confidence interval for the population proportion of successes. Using the distribution table, for 90% confidence interval, z-score value is equals to 1.6. Consider Confidence interval formula with proportion, CI [tex]= p ± z×\sqrt\frac{p(1-p)}{n}[/tex]
substitute all known values in above formula, [tex]= 0.4 ± 1.64\sqrt\frac{0.4(1- 0.4)}{155}[/tex]
= 0.4 ± 0.0645
= (0.4 - 0.0645 , 0.4 + 0.0645)
= (0.335 , 0.465)
b) Now, we have to determine a 90% confidence interval for the population proportion of failures.
Now consider, here failure observed values, x = 155 - 62
= 93
proportion, p = x/n
= 93/155 = 0.6
Consider the confidence interval formula, CI [tex]= p ± z×\sqrt\frac{p(1-p)}{n}[/tex]
substitute values, [tex]= 0.6 ±1.64×\sqrt\frac{0.6(1-0.6)}{155}[/tex]
= 0.6 ± 0.0645
= (0.6 - 0.0645 , 0.6 + 0.0645)
= (0.535 , 0.665)
Hence, required value is (0.535 , 0.665).
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Will any ramp with one angle of 4. 8 degrees have a slope ratio of 1 : 12?
Yes, any ramp with an angle of 4.8 degrees will have a slope ratio of 1:12.
The slope ratio is the ratio of the vertical rise to the horizontal run of the ramp, and it is equivalent to the tangent of the angle of inclination of the ramp.
The tangent of 4.8 degrees is approximately 0.0084, which means that for every 1 unit of vertical rise, there is 0.0084 units of horizontal run. To convert this to a ratio, we can multiply both sides by 100 to get:
1 unit of rise : 100 x 0.0084 = 0.84 units of run
Simplifying this ratio by dividing both sides by 0.84, we get:
1 unit of rise : 1.19 units of run
which is equivalent to a slope ratio of 1:12 (since 12 = 1/0.084). Therefore, any ramp with an angle of 4.8 degrees will have a slope ratio of 1:12.
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Which of the following combinations of side lengths would NOT form a triangle with vertices X, Y, and Z?
A.
XY = 7 mm , YZ = 14 mm , XZ = 25 mm
B.
XY = 11 mm , YZ = 18 mm , XZ = 21 mm
C.
XY = 11 mm , YZ = 14 mm , XZ = 21 mm
D.
XY = 7 mm , YZ = 14 mm , XZ = 17 mm
The combination of side lengths that would not form a triangle is C.XY = 11 mm, YZ = 14 mm, XZ = 21 mm.
We shall use the triangle inequality theorem to determine if a set of side lengths can form a triangle.
What is the triangle inequality theorem?The triangle inequality theorem says that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
We shall calculate each of the options:
For option A:
XY + YZ = 7 mm + 14 mm = 21 mm which is < XZ = 25 mm.
Therefore, option A does form a triangle.
For option B:
XY + YZ = 11 mm + 18 mm = 29 mm, which is > XZ = 21 mm.
YZ + XZ = 18 mm + 21 mm = 39 mm, which is > XY = 11 mm.
XY + XZ = 11 mm + 21 mm = 32 mm, which is > YZ = 18 mm.
Therefore, option B does form a triangle.
For option C:
XY + YZ = 11 mm + 14 mm = 25 mm, and is > XZ = 21 mm.
Therefore, option C does not form a triangle.
For option D:
XY + YZ = 7 mm + 14 mm = 21 mm, which is > XZ = 17 mm.
YZ + XZ = 14 mm + 17 mm = 31 mm, which is > XY = 7 mm.
XY + XZ = 7 mm + 17 mm = 24 mm, which is > YZ = 14 mm.
Therefore, option D does form a triangle.
Therefore, the combination of side lengths that would not form a triangle is XY = 11 mm, YZ = 14 mm, XZ = 21 mm.
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A small barbershop, operated by a single barber, has room for at most two customers. potential customers arrive at a poisson rate of three per hour, and the successive service times are independent exponential random variables with mean 1 4 hour. (a) what is the average number of customers in the shop
The average number of customers in the shop is 7.5
How we find the average number of customers in the shop?The average number of customers in the shop can be calculated using the M/M/2 queuing model. In this model, we assume that the arrivals follow a Poisson distribution, and the service times follow an exponential distribution.
The subscript "2" in M/M/2 refers to the fact that there are two servers or service channels available.
Using Little's Law, the average number of customers in a stable system is equal to the product of the arrival rate and the average time spent in the system.
Thus, to calculate the average number of customers in the shop, we need to find the average time spent in the system.
The average time spent in the system can be calculated as the sum of the average time spent waiting in the queue and the average time spent being served. Using the M/M/2 queuing model,
the average time spent waiting in the queue can be calculated as [tex](λ^2)/(2μ(μ-λ))[/tex], where λ is the arrival rate and μ is the service rate. In this case, λ=3 and μ=1/2 since there is one barber who can serve one customer at a time.
Thus, the average time spent waiting in the queue is [tex](3^2)/(21/2(1/2-3))[/tex] = 9/4 hours. The average time spent being served is the mean service time, which is 1/4 hour. Therefore, the average time spent in the system is 9/4 + 1/4 = 5/2 hours.
Finally, using Little's Law, the average number of customers in the shop is λ times the average time spent in the system, which is 3*(5/2) = 15/2 or 7.5 customers.
However, since the shop can only accommodate at most two customers at a time, the actual number of customers in the shop would be either one or two.
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if f' * (x) = 2x - 1 and g(x) - x + 3 prove that f g(x) is a linear function
The composite function fg(x) is a linear function by the proof shown below
Proving that the function fg(x) is a linear functionFrom the question, we have the following parameters that can be used in our computation:
f(x) = 2x - 1
g(x) = -x + 3
The above functions are linear functions
This means that the function fg(x) will also be a linear function
To prove this, we have
f(g(x)) = 2(g(x)) - 1
substitute the known values in the above equation, so, we have the following representation
f(g(x)) = 2(-x + 3) - 1
So, we have
f(g(x)) = -2x - 7
Hence, the function is a linear function
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Which statement correctly compares the values of 2s in 43,290 and 32,865?
A. 20 is 1 times the value of 200.
B. 200 is 1/20 the value of 2,000.
C. 200 is 10 times the value of 2,000.
Answer:
Step-by-step explanation:
The value of 2s in 43,290 is 2,000, while the value of 2s in 32,865 is 20.
B. 200 is 1/20 the value of 2,000.
This statement is correct, as 200 is 1/10 of 2,000, and there are two 0s in the value of 2s in 43,290 compared to one 0 in the value of 2s in 32,865.
Evaluate the line integral JF. dr where F = (-2 sin x, 2 cos y, 6zx) and C is the path given by r(t) = (3t^3, -3t^2, -3t) for 0 <= t <= 1
To evaluate the line integral JF.dr, where F = (-2 sin x, 2 cos y, 6zx) and C is the path given by r(t) = (3t^3, -3t^2, -3t) for 0 <= t <= 1, we first need to parameterize F and r in terms of t.
For F, we have:
F = (-2 sin x, 2 cos y, 6zx) = (-2 sin (3t^3), 2 cos (-3t^2), 6(3t^3)(-3t)) = (-2 sin (3t^3), 2 cos (3t^2), -54t^4)
For r, we already have the parameterization:
r(t) = (3t^3, -3t^2, -3t)
Now we can use the formula for the line integral:
JF.dr = ∫(F dot dr)
= ∫(-2 sin (3t^3) dx + 2 cos (3t^2) dy - 54t^4 dz)
= ∫(-18t^2 cos (3t^2) + 18t^2 cos (3t^2) - 54t^4) dt
= ∫(-54t^4) dt
= -9t^5 + C
Evaluating this expression for t = 1 and t = 0, we get:
JF.dr = (-9(1)^5 + C) - (-9(0)^5 + C)
= -9 + 9
= 0
Therefore, the line integral JF.dr evaluated along the path given by r(t) = (3t^3, -3t^2, -3t) for 0 <= t <= 1 is equal to 0.
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In circle M with m \angle LMN= 66m∠LMN=66 and LM=19LM=19 units find area of sector LMN. Round to the nearest hundredth
We can use the formula for the area of a sector to find the area of sector $LMN$
How to find the area of a sector with central angle $\theta$ in a circle with radius $r$?The area of a sector with central angle $\theta$ in a circle with radius $r$ is given by:
$A = \frac{\theta}{360^\circ} \pi r^2$
In this case, we know that $m\angle LMN = 66^\circ$ and $LM = 19$ units, so the radius of circle M is half of the diagonal of the rectangle formed by $LM$ and $MN$. Using the Pythagorean theorem, we can find the length of $MN$:
$MN^2 = LM^2 + LN^2 = LM^2 + LM^2 = 2LM^2$
$MN = \sqrt{2} LM = \sqrt{2} \cdot 19$
So the radius of circle M is $r = \frac{1}{2}MN = \frac{1}{2}\sqrt{2} \cdot 19$
Now we can use the formula for the area of a sector to find the area of sector $LMN$:
$A = \frac{m\angle LMN}{360^\circ} \pi r^2 = \frac{66^\circ}{360^\circ} \pi \left(\frac{1}{2}\sqrt{2} \cdot 19\right)^2 \approx \boxed{90.89}$ square units (rounded to the nearest hundredth).
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I seriously need help with this please anyone.
1. Complete the Pythagorean triple. (24,143, ___)
2. Given the Pythagorean triple (5,12,13) find x and y
3. Given x=10 and y=6 find associated Pythagorean triple
4. Is the following a possible Pythagorean triple? (17,23,35)
Answer:
no it is not possible
Step-by-step explanation:
HELP NEEDED ASAP!!!!
The table shows data from a survey about the number of times families eat at restaurants during a week. The families are either from Rome, Italy, or New York, New York:
High Low Q1 Q3 IQR Median Mean σ
Rome 18 1 3 7 4 6.5 6.4 4.3
New York 14 1 4.5 8.5 4 5.5 6.1 3.2
Which of the choices below best describes how to measure the center of these data?
a.Both centers are best described by the mean.
b.Both centers are best described by the median.
c.The Rome data center is best described by the mean. The New York data center is best described by the median.
d.The Rome data center is best described by the median. The New York data center is best described by the mean.
The choice which best describes the measure of center of these data is (d) Rome data center is "best-described" by median and data center of "New-York" is "best-described" by mean.
In the table provided below, we see that the "IQR" for Rome is relatively large compared to the IQR for New York, which suggests that that there may be some skewness in the distribution of the Rome data. So, the median would be a better-measure of center than the mean.
On the other hand, the IQR for "New-York" is relatively small, which indicates that the data is more symmetric and the mean would be a better measure of center.
Therefore, the correct answer is (d).
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The given question is incomplete, the complete question is
The table shows data from a survey about the number of times families eat at restaurants during a week. The families are either from Rome, Italy, or New York, New York:
High Low Q1 Q3 IQR Median Mean σ
Rome 18 1 3 7 4 6.5 6.4 4.3
New York 14 1 4.5 8.5 4 5.5 6.1 3.2
Which of the choices below best describes how to measure the center of these data?
(a) Both centers are best described by the mean.
(b) Both centers are best described by the median.
(c) The Rome data center is best described by the mean. The New York data center is best described by the median.
(d) The Rome data center is best described by the median. The New York data center is best described by the mean.
Suppose an amusement park is being built in a city with a population of 100. Voluntary contributions are being solicited to cover the cost. Each citizen is being ask to give $100. The more people contribute, the larger the park will be and the greater the benefit to each citizen. But it is not possible to keep out the noncontributors; they get their share of this benefits anyway. Suppose that when there are n contributors in the population, where n can be any whole number between 0 and 100. The benefit to each citizen in monetary unit equivalents in n 2 dollars.
Required:
a. Suppose that initially no one is contributing. You are the mayor of the city. You would like everyone to contribute and can use persuasion on some people. What is the minimum number whom you need to persuade before everyone else will join voluntarily?
b. Find the Nash equilibria of the game where each citizen is deciding whether to contribute
The minimum number of people that need to be persuaded is two. When there are 0 contributor, 1 contributor, 2 or more contributor this is a the Nash equilibria.
a. Let's first calculate the benefit to each citizen when there are n contributors. According to the problem, the benefit is n^2 dollars. So when there are 0 contributors, the benefit to each citizen is 0 dollars. When there is 1 contributor, the benefit to each citizen is 1 dollar. When there are 2 contributors, the benefit to each citizen is 4 dollars. And so on, up to 10,000 dollars per citizen when all 100 citizens contribute.
Now let's think about the incentives of each citizen to contribute. If no one contributes, everyone gets 0 dollars of benefit. If one person contributes, that person gets 1 dollar of benefit, and everyone else gets 0 dollars. So each person has an incentive to free-ride, hoping that someone else will contribute.
But if two people contribute, each person gets 4 dollars of benefit, which is more than the 1 dollar cost of contributing. So once there are at least two contributors, it becomes rational for everyone else to contribute as well.
Therefore, the minimum number of people that need to be persuaded is two. Once two people contribute, it becomes rational for everyone else to contribute as well.
b. Let's consider the Nash equilibria of the game where each citizen is deciding whether to contribute. A Nash equilibrium is a situation where no one has an incentive to change their strategy, given the strategies of all the other players.
In this case, each citizen has two strategies: contribute or free-ride. Let's consider the case where n citizens are contributing. If everyone else is contributing, then it is rational to contribute as well, since the benefit of contributing is greater than the cost.
If everyone else is free-riding, then it is rational to free-ride as well, since the cost of contributing is greater than the benefit. However, if some people are contributing and some people are free-riding, then it may be rational to contribute, since the benefit of contributing may outweigh the cost, depending on the number of contributors.
Therefore, there are multiple Nash equilibria in this game, depending on the number of contributors. When there are 0 contributors, everyone is free-riding and this is a Nash equilibrium. When there is 1 contributor, that person is contributing and everyone else is free-riding, and this is a Nash equilibrium. When there are 2 or more contributors, everyone is contributing, and this is a Nash equilibrium.
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