This statement is not necessarily true.
A real matrix can have real or complex eigenvalues.
A real matrix can have real or complex eigenvalues. The number of real eigenvalues of a matrix may be even or odd, and there is no general rule that determines the parity of the number of real eigenvalues.
For example, the 5x5 real matrix
```
[ 0 1 0 0 0 ]
[ 1 0 0 0 0 ]
[ 0 0 0 1 0 ]
[ 0 0 1 0 0 ]
[ 0 0 0 0 1 ]
```
has two real eigenvalues (1 and -1), which is an even number.
On the other hand, the 5x5 real matrix
```
[ 1 1 0 0 0 ]
[ 1 1 0 0 0 ]
[ 0 0 1 1 0 ]
[ 0 0 1 1 0 ]
[ 0 0 0 0 0 ]
```
has three real eigenvalues (2, 0, and -1), which is an odd number.
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An internal quality study by American Airlines revealed that lost bags occur at an average rate of 4.2 bags per week at the Dallas/Fort Worth airport. If we want to estimate the probability that at least 6 bags will be lost in a given week at the airport, we should use the binomial distribution. O True O False
in statistics, an association refers to group of answer choices the existence of an overall pattern of joint variation between variables, regardless of origin or cause. a linear or curved pattern of joint variation between two quantitative variables. the existence of a causal pattern of joint variation between variables, based on sample data. a linear pattern of joint variation between two quantitative variables.
The additional analysis and evidence may be needed to establish a causal relationship between variables.
What is the pattern of joint variation between variables?The existence of an overall pattern of joint variation between variables, regardless of origin or cause.
In statistics, an association refers to the presence of a relationship or pattern of joint variation between two or more variables. This pattern can take various forms, including linear or curved, but the key characteristic is that the variables tend to vary together in some way.
However, an association alone does not necessarily imply causation. In other words, just because two variables are associated or vary together does not mean that one variable causes the other. Additional analysis and evidence may be needed to establish a causal relationship between variables.
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1. 84x+² = 64
2. 5x-6 = 125
3. 819+2 = 33a+1
4. 256b+2 = 42-2b
5. 93c+1 = 27³c-1
6. 82y+4 = 16+1
Solve each equation
7. In 2009, Suzan received $10,000 from her grandmother. Her parents invested all of the
money, and by 2021, the amount will have grown to $16,960.
a. Write an exponential function that could be used to model the money y. Write the
function in terms of x, the number of years since 2009.
b. Assume that the amount of money continues to grow at the same rate. What
would be the balance in the account in 2031?
Use the fact that for points (a1, b1) and (a2, b2) in the coordinate plane, we can calculate the slope of the line through these points using the following formula. Slope = Δy Δx = b2 − b1 a2 − a1 Find the point where the line through (5, 2) with slope 4 crosses the vertical axis. (x, y) =
The values: y - 2 = 4 * (x - 5) Now, set x = 0 and solve for y: y - 2 = 4 * (0 - 5) y - 2 = -20 y = -18 So, the point where the line crosses the vertical axis is (0, -18).
To find the point where the line through (5, 2) with slope 4 crosses the vertical axis, we first need to use the given formula to find the equation of the line.
Using the point-slope form of a line, we have:
y - y1 = m(x - x1)
where m is the slope and (x1, y1) is the given point (5, 2).
Plugging in m = 4 and (x1, y1) = (5, 2), we get:
y - 2 = 4(x - 5)
Simplifying, we get:
y = 4x - 18
To find the point where this line crosses the vertical axis, we set x = 0 and solve for y:
y = 4(0) - 18
y = -18
So the point where the line crosses the vertical axis is (0, -18).
Therefore, the answer is (x, y) = (0, -18).
To summarize, we used the given formula to calculate the equation of the line through (5, 2) with slope 4, and then found the point where this line crosses the vertical axis by setting x = 0 and solving for y.
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What’s the answer? I need help pls
The matrix {bᵃ ⁻ᵇₐ} is option C. dilation and rotation.
How did we arrive at this assertion?The matrix {bᵃ ⁻ᵇₐ} can be written as:
{bᵃ -bₐ/bᵃ}
{ 0 1/bᵃ }
This matrix represents a dilation by a factor of bᵃ in the x-direction and a factor of 1/bᵃ in the y-direction, followed by a rotation of -tan⁻¹(b) radians counterclockwise.
Therefore, the correct answer is C. dilation and rotation.
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A pet shop said that there are 24% of black cats and 16% wereorange. Assume that they're correct and a large sample of cats arerandomly selected.a.) What is the probability that two cats selected f
If you want to know the probability that two cats selected are both black: P(both black) = 0.24 * 0.24 = 0.0576 or 5.76%
If you want to know the probability that one cat is black and the other is orange: P(black and orange) = 0.24 * 0.16 = 0.0384 or 3.84%
To find the probability of selecting two cats with specific fur colors, we can use the formula for calculating the probability of independent events:
P(A and B) = P(A) x P(B)
where P(A) is the probability of event A and P(B) is the probability of event B.
a) Let's find the probability of selecting two black cats. The probability of selecting the first black cat is 24%, or 0.24. The probability of selecting a second black cat from the remaining cats is also 24%, but since we are assuming random selection, the probability of the two events happening together is the product of their probabilities:
P(2 black cats) = P(black cat 1) x P(black cat 2) = 0.24 x 0.24 = 0.0576 or 5.76%
Therefore, the probability of selecting two black cats is 5.76%.
b) Let's find the probability of selecting one black cat and one orange cat. The probability of selecting a black cat first is 24%, or 0.24. The probability of selecting an orange cat second is 16%, or 0.16. Since there are two ways this can happen (black-orange or orange-black), we need to add the probabilities of both events:
P(1 black and 1 orange) = P(black cat 1) x P(orange cat 2) + P(orange cat 1) x P(black cat 2)
= 0.24 x 0.16 + 0.16 x 0.24 = 0.0768 or 7.68%
Therefore, the probability of selecting one black cat and one orange cat is 7.68%.
Assuming the pet shop's data is correct, the probability of selecting two cats with specific colors can be calculated as follows:
a) If you want to know the probability that two cats selected are both black:
P(both black) = 0.24 * 0.24 = 0.0576 or 5.76%
If you want to know the probability that one cat is black and the other is orange:
P(black and orange) = 0.24 * 0.16 = 0.0384 or 3.84%
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Use the shell method to set up and evaluate the integral that gives the volume of the solid generated by revolving the plane region about the y-axis.y = 49 − x2y = 0
By using the shell method to set up and evaluate the integral that gives the volume of the solid generated by revolving the plane region about the y-axis, given the functions y = 49 - x^2 and y = 0.The volume of the solid generated by revolving the plane region about the y-axis is 0.
shell method :
To find the volume of the solid,
we'll use the shell method formula:
V = 2 * pi * ∫[a, b] x * h(x) dx
In this case, a = -7, b = 7 (because x = ±√(49 - y)), and h(x) = 49 - x^2. So the integral becomes:
V = 2 * pi * ∫[-7, 7] x * (49 - x^2) dx
Now, let's evaluate the integral:
1. Expand the integrand:
x * (49 - x^2) = 49x - x^3
2. Find the antiderivative:
∫(49x - x^3) dx = 49x^2/2 - x^4/4 + C
3. Plug in the limits of integration and subtract:
[(49(7)^2)/2 - (7)^4/4] - [(49(-7)^2)/2 - (-7)^4/4] = [49(49) - 2401/4] - [49(49) - 2401/4] = 0
4. Multiply by the constant
(2 * pi): 2 * pi * 0 = 0
The volume of the solid generated by revolving the plane region about the y-axis is 0.
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Find an equation for the line that passes through the points (5,-4) and (1,2)
The answer is y = — 1 1/2x + 3 1/2
WHAT EQUASION IS EQUIVALENT TO 1/6(30x - 24y)-1/8(32x - 16y) I NEED TO KNOW ASAP
Answer: x-2y
Step-by-step explanation:
i think the answer is x-2y
You can decompose a composite figure into familiar shapes to find its area. To find the area
of the composite figure, add the areas of the rhombus, parallelogram, and trapezoid.
The total area of the sum of area of rhombus, area of parallelogram and area of trapezoid.
Composite geometric figures are made from two or more geometric figures.
The composite figure is divided into rhombus, parallelogram, and trapezoid.
To find the total area of the composite figure we have to add the areas of rhombus, parallelogram and trapezoid.
Area = Area of rhombus + Area of parallelogram + Area of trapezoid
=bh + bh + 1/2(b₁+b₂)h
=h(2b +(b₁+b₂)/2)
Hence, the total area of the sum of area of rhombus, area of parallelogram and area of trapezoid.
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how many ways are there to line up the ten people if the groom must be to the immediate left of the bride in the photo?
There are 362,880 ways to line up the ten people if the groom must be to the immediate left of the bride in the photo. To calculate this, treat the groom and bride as a single unit, so you have 9 units to arrange (8 individuals + 1 bride-groom pair). There are 9! (9 factorial) ways to arrange these units, which is 362,880.
If the groom must be to the immediate left of the bride in the photo, then we can think of them as a single entity that must always appear together in the lineup. Therefore, we only need to consider the arrangements of the remaining 8 people. There are 8! (8 factorial) ways to arrange 8 people. Thus, there are 8! ways to line up the ten people if the groom must be to the immediate left of the bride in the photo.
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What is the distance between -14 and -16.5 on a number line??
answer:
It Is ፡ 2.5
Step-by-step explanation:
when u Ask a quastion related to distance u always used absolute value then the difference will be the distance between it
/-14-(-16.5)/ or /-16.5-(-14)/
/-14+16.5/ or /-16•5+14/
= /2.5/ or /-2.5/ when both of the num. are out they will be 2.5
M<1=(2x+109) and m<3=(5x+97) find m<2
The calculated measure of the angle 2 is m∠2 = -26 - 7x
Finding the measure of angle 2From the question, we have the following parameters that can be used in our computation:
m∠1 = (2x + 109) and m∠3 = (5x+97)
Assuming the angles are angles in a triangle, then we have
m∠1 + m∠2 + m∠3 = 180
Substitute the known values in the above equation, so, we have the following representation
2x + 109 + 5x + 97 + m∠2 = 180
Evaluate
m∠2 = -26 - 7x
Hence, the measure of the angle is m∠2 = -26 - 7x
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1. what is the probability of getting an even number when rolling a six-sided number cube? (1 point)
The probability of getting an even number when rolling a six-sided number cube is 1/2 or 50%, the probability of getting an even number is the number of ways to roll an even number (3) divided by the total number of possible outcomes (6), which is 3/6 or simplified to 1/2. This means that if you roll the cube multiple times, you can expect to get an even number about half of the time.
The probability of getting an even number when rolling a six-sided number cube is 1/2 or 50%. This is because there are three even numbers (2, 4, 6) and three odd numbers (1, 3, 5) on the cube. Each number has an equal chance of being rolled, so the probability of rolling an even number is the same as rolling an odd number. Therefore, the probability of getting an even number is the number of ways to roll an even number (3) divided by the total number of possible outcomes (6), which is 3/6 or simplified to 1/2. This means that if you roll the cube multiple times, you can expect to get an even number about half of the time.
The probability of getting an even number when rolling a six-sided number cube can be determined by examining the possible outcomes. A standard six-sided cube has numbers ranging from 1 to 6. Among these, the even numbers are 2, 4, and 6. To find the probability, you can divide the number of successful outcomes (rolling an even number) by the total number of possible outcomes (rolling any number from 1 to 6).
In this case, there are 3 successful outcomes (2, 4, and 6) and 6 total possible outcomes (1, 2, 3, 4, 5, and 6). So, the probability of getting an even number is:
Probability = (Number of successful outcomes) / (Total number of possible outcomes) = 3/6
Upon simplification, you'll find the probability is:
Probability = 1/2 or 50%
Therefore, when rolling a six-sided number cube, the probability of getting an even number is 1/2 or 50%.
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those answers ar all wrong!!= Discrete Random Variables Instructor created question points O Points: 0 of 1 Save Suppose that you buy two S1 Lotto Texas tickets What is the probability that both are winning? (Round to six decima
A discrete random variable represents a finite number of outcomes, and in the context of your question, we'll be looking at the probability of both Lotto Texas tickets winning.
Let's denote the probability of a single ticket winning as "p". Since you have two tickets, you want to find the probability of both winning, which can be calculated by multiplying the individual probabilities: P(both winning) = p * p = p^2.
To determine the exact probability (p), we would need to know the total number of possible ticket combinations and the number of winning combinations. However, you can substitute the specific probability values provided for the Lotto Texas game to calculate the final answer, rounding to six decimal places as requested.
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Suppose scores of a standardized test are normally distributed and have a known population standard deviation of 8 points and an unknown population mean. A random sample of 25 scores is taken and gives a sample mean of 93 points.
Find the margin of error for a confidence interval for the population mean with a 98% confidence level.
z0.10 z0.05 z0.025 z0.01 z0.005
1.282 1.645 1.960 2.326 2.576
You may use a calculator or the common z values above.
Round the final answer to two decimal places.
Rounded to two decimal places, the margin of error is 4.12 points. To find the margin of error for a 98% confidence interval, we'll use the formula:
Margin of Error = z-score * (population standard deviation / sqrt(sample size))
First, we need to find the z-score for a 98% confidence interval. Since the table provided shows two-tailed z-scores, we will look at the z0.01 column (1 - 0.98 = 0.02, and 0.02 / 2 = 0.01), which gives us a z-score of 2.576.
Next, we have the population standard deviation (8 points) and the sample size (25).
Now we can calculate the margin of error:
Margin of Error = 2.576 * (8 / sqrt(25))
Margin of Error = 2.576 * (8 / 5)
Margin of Error = 2.576 * 1.6
Margin of Error = 4.1216
Rounded to two decimal places, the margin of error is 4.12 points.
Your answer: 4.12
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Find the area of the smaller sector.
Round to the nearest tenth.
77⁰
10.7 in
Area = [? ]in²
The area of the smaller sector is 76.9 degrees.
How to find the area of a sector?The area of the smaller sector can be found as follows:
Therefore,
area of a sector = ∅/ 360 × πr²
where
∅ = central angler = radiusTherefore,
∅ = 77 degrees
r = 10.7 inches
area of the sector = 77 / 360 × 3.14 × 10.7²
area of the sector = 77 / 360 × 3.14 × 114.49
area of the sector = 27681.3922 / 360
area of the sector = 76.8927561111
area of the sector = 76.9 degrees
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What is the answer to this problem
The slope of the line graphed to represent the volume of water in a pool over time would be described as -6.
As the slope is negative, the line is described as decreasing.
How to define a linear function?The slope-intercept representation of a linear function is given by the equation presented as follows:
y = mx + b
The coefficients of the function and their meaning are described as follows:
m is the slope of the function, representing the change in the output variable y when the input variable x is increased by one.b is the y-intercept of the function, which is the initial value of the function, i.e., the numeric value of the function when the input variable x assumes a value of 0. On a graph, it is the value of y when the graph of the function crosses the y-axis.In the context of this problem, we have that each month, the amount of water in the pool decays by 6 gal, hence the slope of the line is given as follows:
m = -6.
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Suppose that a randomly generated list of numbers from 0 to 9 is being used to simulate an event that has a probability of success of 40%. Which of these groups of numbers could represent a success?
A. 0,1
B. 0,1,2,3
C. 0,1,2
D. 0,1,2,3,4
Answer:
B. 0, 1, 2, 3
Step-by-step explanation:
You want to know the numbers from 0–9 that could be used to represent success if the probability of success is 40%.
ModelTo model a 40% success rate, we want 40% of the possible outcomes to represent success. There are 10 numbers in the range 0–9, so we need to have 40%×10 = 4 of the numbers represent success.
A suitable choice for 4 of the numbers is ...
0, 1, 2, 3 . . . . . choice B
<95141404393>
a positive angle less than 360 that is coterminal with 695 is
The requried, positive angle less than 360 that is Coterminal with 695 is 335 degrees.
To find an angle that is coterminal with 695 and less than 360 degrees, we can subtract 360 degrees from 695 until we get an angle that is less than 360 degrees.
695 - 360 = 335
335 is an angle that is coterminal with 695 and less than 360 degrees.
Thus, a positive angle less than 360 that is Coterminal with 695 is 335 degrees.
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He had a/an…..of notes to be read before exams.
a. wad
b. bunch
c. stack
d. album
The most appropriate option in this context would be "stack".
"Stack" is commonly used to refer to a collection of papers or documents, such as a pile of notes. "Wad" typically refers to a small, crumpled mass of paper or money, while "bunch" suggests a more haphazard or unorganized grouping. "Album" typically refers to a book or binder containing a collection of photographs or other images, rather than notes.
Answer:
c. stack is the correct answer
call a set of integers spacyif it contains no more than one out of any three consecutive integers. how many subsets of {1, 2, 3, ...,12}, including the empty set, are spacy?
This count includes the empty set, so there are 256 - 1 = 255 non-empty spacy subsets of {1, 2, 3, ..., 12}. To solve this problem, we can use a combination of counting and logical reasoning.
First, let's consider the smallest possible spacy subset of {1, 2, 3, ..., 12}. It must contain one of the integers 1, 2, or 3, but not any of the others in that sequence. The same is true for the next set of three integers, 4, 5, and 6, and so on. Therefore, we can break down the problem into smaller subproblems by considering subsets that start with each of the integers 1 through 10.
For example, let's consider subsets that start with 1. If a spacy subset contains 1, it cannot contain 2 or 3. It can, however, contain any of the other integers from 4 through 12. Therefore, there are 8 possible integers that can be included in such a subset. Similarly, if a spacy subset starts with 2, it can contain any of the integers 5 through 12, giving us 8 possible integers again. If a subset starts with 3, it can contain any of the integers 6 through 12, giving us 7 possible integers.
We can continue this process for each of the possible starting integers, and count up the number of possible subsets. The total number of spacy subsets of {1, 2, 3, ..., 12} is then the sum of these subproblems.
Starting with 1: 8 possible integers
Starting with 2: 8 possible integers
Starting with 3: 7 possible integers
Starting with 4: 7 possible integers
Starting with 5: 7 possible integers
Starting with 6: 6 possible integers
Starting with 7: 6 possible integers
Starting with 8: 6 possible integers
Starting with 9: 5 possible integers
Starting with 10: 5 possible integers
Adding these up, we get a total of 63 possible spacy subsets of {1, 2, 3, ..., 12}, including the empty set.
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Please answer number 9.
I've drawn the dimensions, I just need help with labeling.
The polygon which on rotated gives the given cylinder is a rectangle with dimensions 10 inches × 9 inches.
Given a cylinder with the diameter of the base 18 inches and the height of the cylinder 10 inches.
This cylinder is formed by rotating some polygon around YZ.
The polygon must be a rectangle which has the height or the length equal to the height of the cylinder.
So length = 10 inches
The width of the rectangle will be half of the diameter.
Width = 18/2 = 9 inches
Hence the rotated polygon is a rectangle with length 10 inches and width 9 inches.
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A supermarket sells cornflakes for $3. 60 per box. If the markup on the cereal is 80%, how much did the supermarket pay for each box?
A supermarket sells cornflakes for $3 the selling price the supermarket pay for each box is $2.
The markup is the percentage added to the cost price to determine the selling price. We can use the formula:
selling price = cost price + markup
We know that the selling price of the cornflakes is $3.60 per box and the markup is 80%, so we can write:
3.60 = cost price + 0.80(cost price)
Simplifying this equation, we get:
3.60 = 1.80(cost price)
Dividing both sides by 1.80, we get:
cost price = 2
Therefore, the supermarket paid $2 for each box of cornflakes.
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Please Answear Quickly
These waves were most wrongfully and barbarously abrupt, reflecting the historical influence of a time when ships were powered by
Thus, option D is correct.
According to the passage, which was written by Stephen Crane, regarding the open boat. The line where it was depicted is about the wrongful and the barbarous. Wave that was present. They suggested that in earlier times or in historic times, there weren't any technologies that would help them sail, but the waves were the ones who took them from one position to another.
Therefore, option D is the correct option.
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Solving Two-step inequalities
with work shown
3x+7<9
Answer:
x < 2/3
Step-by-step explanation:
You want to solve the 2-step inequality 3x +7 < 9.
Two stepsIf the coefficient of the variable is positive, the two steps to solving the inequality are identical to the two steps for solving a "2-step" equation.
Step 1:Isolate the variable term by subtracting the unwanted constant with it.
3x +7 -7 < 9 -7
3x < 2
Step 2:Divide by the coefficient of the variable.
3x/3 < 2/3
x < 2/3 . . . . . . the solution
__
Additional comment
If the number you divide by (or multiply by) is negative, the sense of the inequality is reversed. For example, ...
-2x < 6
x > -3 . . . . . . divide by negative 2 and reverse the inequality symbol
This comes about because multiplying by a negative number changes the ordering.
-2 < -1
2 > 1
Some functions change ordering, too, so care must be taken when functions (or inverse functions) are applied to an inequality.
Let y(t) represent your retirement account balance, in dollars, after t years. Each year the account earns 5% interest, and you deposit 8% of your annual income. Your current annual income is $30000, but it is growing at a continuous rate of 3% per year. Write the differential equation modeling this situation. The correct answer is : dy/dt= 0.05y+2400e^(0.03*t) Can someone work me through this problem?
Each year the account earns 5% interest, and you deposit 8% of your annual income with an annual income of $30000 which is growing at a continuous rate of 3% per year. The given differential equation models this situation dy/dt= 0.05y+2400e^(0.03*t)
First, let's break down the information given in the problem:
- y(t) represents your retirement account balance in dollars after t years.
- The account earns 5% interest each year, which means that the balance increases by 5% of the previous year's balance.
- You deposit 8% of your annual income into the account each year. Your current annual income is $30,000, but it is growing at a continuous rate of 3% per year.
Now, let's write the differential equation to model this situation. We know that the rate of change of y(t) is equal to the sum of the interest earned and the deposits made each year. In other words:
dy/dt = rate of interest + rate of deposits
The rate of interest is simply 5% of the current balance, or 0.05y. The rate of deposits is 8% of your current annual income, which is $30,000 plus 3% of your current annual income for each additional year. We can express this as [tex]0.08(30000)(1.03)^t[/tex]. Putting it all together, we get:
dy/dt = 0.05y + [tex]0.08(30000)(1.03)^t[/tex]
But this isn't quite in the form of our desired answer yet. We can simplify the right-hand side by factoring out 0.05y, which gives us:
dy/dt = [tex]0.05y(1 + 1.6(1.03)^t)[/tex]
Now we have our differential equation in the form of y' = ky, where k = [tex]0.05(1 + 1.6(1.03)^t)[/tex]. To solve this equation, we can use the separation of variables:
dy/y = k dt
Integrating both sides gives us:
ln|y| = kt + C
where C is the constant of integration. Exponentiating both sides gives us:
|y| = [tex]e^{(kt+C)}[/tex] = [tex]Ce^{(kt)}[/tex]
where C is a constant that depends on the initial conditions (i.e. the value of y when t=0). We can solve for C using the fact that y(0) = some initial value, say $10,000:
|10000| = [tex]Ce^{(0)}[/tex]
C = 10000
So our final solution is:
y(t) = [tex]10000e^{(kt)}[/tex]
where k is still equal to 0.05(1 + 1.6(1.03)^t). If we substitute this expression for k and simplify, we get:
y(t) = [tex]10000e^{(0.05t + 2400(e^{(0.03t)-1)/0.03)}}[/tex]
which is equivalent to the answer given: dy/dt = 0.05y + [tex]2400e^{(0.03t)}[/tex]
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The theory of rational expectations suggests that:
1)Discretionary monetary and fiscal policy will work in the short run, but not in the long run
2)People will not be able to correctly anticipate the effects of economic policies
3)Information may change people's expectations and allow them to correctly anticipate policy effects
4)Discretionary monetary and fiscal policy will work in the long run, but not in the short run
The theory of rational expectations suggests that people will form expectations about future economic conditions based on all available information, including past experiences and government policies.
This means that discretionary monetary and fiscal policy may work in the short run, but not in the long run, as people will adjust their behavior to take into account the expected effects of policy changes. However, it is also possible that new information may change people's expectations and allow them to correctly anticipate policy effects. Overall, the theory of rational expectations suggests that economic policies should be designed with a long-term perspective in mind, as short-term changes may not have the intended effects.
The theory of rational expectations suggests that information may change people's expectations and allow them to correctly anticipate policy effects (Option 3). This implies that individuals use all available information to make predictions about future economic policies and adjust their behavior accordingly, which can affect the overall effectiveness of discretionary monetary and fiscal policies.
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Erica is 12
4
5
years old. Jared is 1
1
6
years younger than Erica and Jane is 1
1
3
years younger than Jared. How old is Jane?
Answer: 1024!
Step-by-step explanation:
Need answer for algebra it’s on rational functions
Answer:
C
Step-by-step explanation:
the denominator of f(x) cannot be zero as this would make f(x) undefined.
Equating the denominator to zero and solving gives the value that x cannot be and if the numerator is non zero for this value then it is a vertical asymptote.
2x + 6 = 0 ( subtract 6 from both sides )
2x = - 6 ( divide both sides by 2 )
x = - 3
Thus x = - 3 is a vertical asymptote of f(x)