To reach this concentration 6.69 hours must pass.
We have that the model equation in this case would be of the following type, being "and" the concentration of bacteria:
⇒ y = \(a e^{bt}\)
where a and b are constants and t is time.
We know that when the time is 0, we know that there are 100,000 bacteria, therefore:
100000 = \(a * e^{b * 0}\)
100000 = a x 1
a = 100000
they tell us that when the time is 4 hours, the amount doubles, that is:
200000 = a e⁴ᵇ
already knowing that a equals 100,000
e⁴ᵇ = 2
4b = ln 2
b = (ln 2) / 4
b = 0.1732
Having the value of the constants, we will calculate the value of the time when there are 320000, that is:
320000 = 100000 \(e^{0.1732t}\)
3.2 = \(e^{0.1732t}\)
ln 3.2 = 0.1732t
t = 1.16 / 0.1732
t = 6.69
Hence, WE can say in order to reach this concentration 3.85 hours must pass.
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Translate the problem into a mathematical sentence, using p as your variable name. Do not include spaces in your answer.
Janet went to the grocery store Thursday night and spent $20.27. She paid $2.01 on two acorn squash. The remainder of the food was for a party she planned to give on Friday night. How much did she spend on food for the party?
The money that Janet spent on food for the party was $18.26
What is an equation?An equation is an expression that shows the relationship between two numbers and variables.
An independent variable is a variable that does not depend on any other variable for its value whereas a dependent variable is a variable that depend on any other variable for its value.
Janet went to the grocery store Thursday night and spent $20.27. She paid $2.01 on two acorn squash. Hence:
Money spent on food for the party = 20.27 - 2.01 = $18.26
The money that Janet spent on food for the party was $18.26
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assume sweden and libya can both produce grain and dates, and that the only limited resource is the farming labor force, meaning that land, water, and all other resources are plentiful in both countries. each farmer in sweden can produce 10 t of grain or 5 t of dates in a season. each farmer in libya can also produce 10 t of grain or 25 t of dates. please answer the four questions.
1. The opportunity cost of producing 1 ton of grain in Sweden is 0.5 tons of dates.
2. The opportunity cost of producing 1 ton of grain in Libya is 2.5 tons of dates.
3. Sweden should focus on producing dates, and Libya should focus on producing grain.
4. Both countries can obtain both goods at a lower opportunity cost than if they had tried to produce both goods themselves.
What is algebra?
Algebra is a branch of mathematics that deals with mathematical operations and symbols used to represent numbers and quantities in equations and formulas.
1. What is the opportunity cost of producing 1 ton of grain in Sweden?
To produce 1 ton of grain in Sweden, a farmer would have to give up producing 0.5 tons of dates (since a farmer in Sweden can produce 10 tons of grain or 5 tons of dates in a season). Therefore, the opportunity cost of producing 1 ton of grain in Sweden is 0.5 tons of dates.
2. What is the opportunity cost of producing 1 ton of grain in Libya?
To produce 1 ton of grain in Libya, a farmer would have to give up producing 2.5 tons of dates (since a farmer in Libya can produce 10 tons of grain or 25 tons of dates in a season). Therefore, the opportunity cost of producing 1 ton of grain in Libya is 2.5 tons of dates.
3. In which country should each good be produced?
Sweden has a comparative advantage in producing dates, since its opportunity cost of producing dates is lower than Libya's. Libya has a comparative advantage in producing grain, since its opportunity cost of producing grain is lower than Sweden's. Therefore, Sweden should focus on producing dates, and Libya should focus on producing grain.
4. Can trade benefit both countries? If so, which good should each country specialize in producing?
Yes, trade can benefit both countries. Sweden should specialize in producing dates and trade them for grain with Libya, which should specialize in producing grain. This way, both countries can obtain both goods at a lower opportunity cost than if they had tried to produce both goods themselves.
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Which of the following allows for someone to draw conclusions about a population from the information collected in a population sample? a. magnitude statistics b. central tendency c. inferential statistics d. effect size
The correct answer is c. Inferential Statistics.
Inferential statistics is the branch of statistics that allows for drawing conclusions about a population based on the information collected from a sample. When conducting research or surveys, it is often impractical or impossible to collect data from an entire population.
Instead, a representative sample is chosen, and inferential statistics are used to make inferences or predictions about the larger population. By analyzing the characteristics and patterns observed within the sample, inferential statistics enable researchers to make generalizations or draw conclusions about the population as a whole.
This process involves applying various statistical techniques, such as hypothesis testing and confidence intervals, to estimate population parameters and assess the reliability of the conclusions. Magnitude statistics, central tendency, and effect size are important concepts in statistics, but they do not specifically address the ability to draw population-level conclusions from sample data.
Magnitude statistics focuses on the size of the effect or relationship between variables, central tendency measures summarize the central values of a dataset, and effect size quantifies the strength of an effect or relationship.
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Which equation could be represented by the number line?
OA. -4+1=-3
OB. -3+4=1
C. 3+ (-4)=-1
D. -3+ (-1) = -4
The equation that can be represented by the number line is option D: -3 + (-1) = -4.
The equation that can be represented by the number line is option D: -3 + (-1) = -4.
Let's analyze each option:
A. -4 + 1 = -3: This equation does not represent the situation where we start from -4 and move 1 unit to the right on the number line, resulting in -3.
B. -3 + 4 = 1: This equation represents the situation where we start from -3 and move 4 units to the right on the number line, resulting in 1. However, this equation does not match the form of the equation in the options.
C. 3 + (-4) = -1: This equation represents the situation where we start from 3 and move 4 units to the left on the number line, resulting in -1. However, this equation does not match the form of the equation in the options.
D. -3 + (-1) = -4: This equation matches the form of the equation in the options, and it represents the situation where we start from -3 and move 1 unit to the left on the number line, resulting in -4.
Therefore, the equation that can be represented by the number line is option D: -3 + (-1) = -4.
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The equation that could be represented by the number line is -3+ (-1) = -4 (option D)
How to check for equation that could be represented by the number line?Let us check each option and delve into their implications on the number line:
A. -4 + 1 = -3: This equation does not depict the scenario where we initiate from -4 and shift 1 unit towards the right on the number line, yielding -3.
B. -3 + 4 = 1: This equation represents the scenario where we commence from -3 and progress 4 units towards the right on the number line, culminating in 1. Nonetheless, this equation fails to conform to the prescribed structure specified in the options.
C. 3 + (-4) = -1: This equation portrays the scenario where we commence from 3 and proceed 4 units towards the left on the number line, resulting in -1. However, this equation does not align with the prescribed format presented in the options.
D. -3 + (-1) = -4: This equation adheres to the stipulated format outlined in the options, and it accurately represents the scenario where we initiate from -3 and traverse 1 unit towards the left on the number line, leading to -4.
There, the equation that can be aptly represented by the number line is option D: -3 + (-1) = -4.
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An isosceles triangle has one angle of 30 degrees. Calculate the possible sizes of the other 2 angles
Answer:
75 and 75
Step-by-step explanation:
Answer:
Hello,
Step-by-step explanation:
2 solutions:
30° is angle of the base: other angle of the base is 30° and the main angle is 180°-30°-30°=120°30° is the main angle, angles of the base are (180°-30°)/2=75° and 75°.The group thought there was enough food for all 5 group members to
complete the trip, with each person getting the required 5600 calories per
day. However, they discover that they are missing 28,800 calories.
Using the map, create a plan a for the rest of the trip that includes taking as
many group members as possible to the South Pole, while sending the rest of
the group members directly back to base camp. Remember that each person
must have 5600 calories of food per day until he or she gets back to base
camp.
Be sure to explain how you came up with your plan. Include all work
necessary to support your answer.
To create a work plan for the food intake of each person in the group, there needs to be the required 5600 calories and there needs to be a replacement for the caloric deficit.
What is a Work Plan?This refers to the formal roadmap that is created for a project for the purposes of streamlining it.
Based on the fact that a map was not provided, there is insufficient data to solve the problem, so a general overview will be given about a work plan.
Because the group is 28,800 calories short and needs to complete the trip with their five members, then they need to ration their supplies.
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minimal sedation is defined as which of the following? group of answer choices less than 50% n2o in the second stage in the continuum more than 50% n2o in the second stage in the continuum less than 50% n2o in the first stage in the continuum more than 50% n2o in the first stage in the continuum
Minimal sedation is characterized by c) less than 50% N2O in the first stage of the continuum.
Minimal sedation is defined as a state in which the patient is able to respond normally to verbal commands, breathe on their own and maintain stable blood pressure and heart rate. It is achieved by administering a small dose of a sedative or anxiolytic medication.
Minimal sedation is a light form of sedation that allows the patient to remain conscious and responsive throughout the procedure, and it helps the patient to relax and reduce anxiety.
It is considered a safer option than deeper forms of sedation as the patient remains able to breathe on their own, which reduces the risk of complications. This level of sedation is often used in procedures such as dental work, minor skin procedures, and diagnostic tests.
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Select the correct answer from each drop-down menu. Brian makes an investment in his company's stock. What does the stock chart say about the stock price today? The down arrow indicates the stock price has decreased from yesterday's price of $ at the of the market day.
Answer: $66.20; close
Step-by-step explanation:
The down arrow indicates the stock price has decreased from yesterday’s price of $ 66.20 at the close of the market day.
Part B
Joe recevied a large jug of antifreeze coolant that is labeled as containing 120
fluid Ounces. He needs to transfer the coolant into pint-sized bottles using the
conversion chart shown below. How many pint-sized bottles will he
need? Explain how you got your answer.
1 gallon (gal) = 4 quarts (at)
1 quart = 2 pints (pt)
1 pint = 2 cups (c)
1 cup = 8 fluid Ounces (fl oz.)
In the box below, write the number of pint-sized bottles he will need and
explain how you got your answer.
Y
Answer:
7.5,
Step-by-step explanation:
8 x 15 = 120
So 15 cups
And then since 2 cups equal a pint
15 divided by 2
Which is 7.5 pints
6. PQR and XYZ are similar with m
Answer:
XZ = 22.5 inches
Step-by-step explanation:
since the triangles are similar then the ratios of corresponding sides are in proportion, that is
\(\frac{XZ}{PR}\) = \(\frac{XY}{PQ}\) ( substitute values )
\(\frac{XZ}{15}\) = \(\frac{9}{6}\) ( cross- multiply )
6 × XZ = 15 × 9 = 135 ( divide both sides by 6 )
XZ = 22.5 inches
triangle xyz is similar to triangle abc solve for k
Answer:
k = 13.5
Step-by-step explanation:
We can use ratios to solve
3 4.5
---- = ---------
9 k
Using cross products
3k = 9*4/5
Divide each side by 3
3k/3 = 9*4.5/3
k =13.5
for the quadrilateral shown, how many different whole numbers could be the length of the diagonal represented by the dashed line?
The different whole numbers could be the length of the diagonal represented by the dashed line is 13
Let the length of the dashed line be x
The sum of the lengths of any two sides in a triangle must be greater than the length of the third side.
From the top triangle, we can say:
8 + 10 > x
18 > x
x < 18
8 + x > 10
x > 2
10 + x > 8
x > -2
From the bottom triangle, we can say:
12 + 16 > x
28 > x
x < 28
12 + x > 16
x > 4
16 + x > 12
x > -4
So x has the restrictions: x < 18 , x > 2 , x > -2 , x < 28 , x > 4 , x > -4
That is.... x < 18 and x > 4
So the whole numbers that x can be are:
5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
There are 13 different whole numbers that could be the length of the dashed line.
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-7 2/3 + (-5 1/2) + 8 3/4 = ????
Answer:
-52/12 or -4 5/12
Step-by-step explanation:
hope this help there 2 ways
Answer:
-53/12 same as -4 4/12 same as -4,416
Step-by-step explanation:
convierte el numero mixto a una fracción impropia
-23/3 + (-5 1/2) + 8 3/4
cuando se encuentren un + en frente de una expresión dentro de un paréntesis, la expresión se mantiene igual
-23/3 - 5 1/2 + 8 3/4
convierte el numero mixto a una fracción impropia
-23/3 - 5 1/2 + 35/4
convierte el numero mixto a una fracción impropia
-23/3 - 11/2 + 35/4
calcula la suma o resta
-53/12
Consider the set of functions p(x) for n = 1,2,..., N, defined by -{t [¹¹] Pn(x) = 1, 0, else 2=1 (a) Verify that the set {p(x)} for a fixed N-value are mutually orthogonal with respect to the inner product (f, g) = f f(x)g(x)dx. (b) For N = 10, compute the least squares approximation ƒ of ƒ = x( ½ − x)(1 − x) — 1. (c) Make a graph of f and f.
(c) Once we obtain the least squares approximation ƒ ~ ƒ, we can make a graph of both functions ƒ and ƒ to compare them visually.
(a) To verify that the set {p(x)} for a fixed N-value are mutually orthogonal, we need to show that the inner product between any two functions in the set is zero.
Let's consider two functions from the set, p(x) and q(x), where p(x) corresponds to the index n and q(x) corresponds to the index m. Without loss of generality, let's assume that n ≤ m.
The inner product between p(x) and q(x) is given by:
(f, g) = ∫[a, b] f(x)g(x)dx
In this case, since the functions are defined as:
p(x) = {1, if x^11 = n
0, else }
q(x) =
{,1, if x^11 = m
0, else }
The inner product becomes:
∫[a, b] p(x)q(x)dx = ∫[a, b] 0 dx = 0
Since the integration of the product of p(x) and q(x) is zero, the functions p(x) and q(x) are orthogonal for any values of n and m. This holds for any pair of functions within the set.
(b) To compute the least squares approximation ƒ of ƒ = x(½ − x)(1 − x) − 1 for N = 10, we need to find the best approximation of ƒ within the subspace spanned by the functions {p(x)} with N = 10.
The least squares approximation can be obtained by finding the coefficients α₁, α₂, ..., α₁₀ that minimize the squared difference between the function ƒ and its approximation:
ƒ ~ ƒ = ∑[n=1 to 10] αn p(x)
To find the coefficients, we can use the inner product defined in the question:
αn = (ƒ, pₙ) / (pₙ, pₙ)
The inner product (ƒ, pₙ) can be calculated as:
(ƒ, pₙ) = ∫[a, b] ƒ(x)pₙ(x)dx
And (pₙ, pₙ) is the inner product of pₙ with itself:
(pₙ, pₙ) = ∫[a, b] (pₙ(x))²dx
By calculating these integrals for each value of n from 1 to 10, we can find the coefficients α₁, α₂, ..., α₁₀.
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Use the Division Property of Equality to complete the following statement. If 4x = 5y, then x = ?
Answer:
\(\boxed {\tt x=\frac{5y}{4}}\)
Step-by-step explanation:
We are given the equation:
\(4x=5y\)
We want to solve for x, so we must isolate x.
x is being multiplied by 4. The inverse of multiplication is division. Use the Division Property of Equality and divide both sides of the equation by 4.
\(\frac{4x}{4} =\frac{5y}{4}\)
\(x=\frac{5y}{4}\)
Using the Division Property of Equality, x is equal to 5y/4
Mark’s car cost $27,000. He paid ½ down and has a month payment of 15% of the balance. What is his monthly payment? How long until he pays it off?
Answer:
2025
27000 x 1/2 = 13500
27000 - 13500 = 13500
13500 x 15% = 2025
Hope this helps!
Solve the formula h = 54t + 1/2 * a * t ^ 2 for a.
The initial equation is:
\(h=54t+\frac{1}{2}at^2\)First, we subtract 54t on both sides as:
\(\begin{gathered} h-54t=54t+\frac{1}{2}at^2-54t \\ h-54t=\frac{1}{2}at^2 \end{gathered}\)Multiplying by 2, on both sides:
\(\begin{gathered} 2\cdot(h-54t)=2\cdot\frac{1}{2}at^2 \\ 2h-108t=at^2 \end{gathered}\)Dividing by t^2, we get:
\(\begin{gathered} \frac{2h-108t}{t^2}=\frac{at^2}{t^2} \\ \frac{2h}{t^2}-\frac{108}{t}=a \end{gathered}\)Answer:
\(a=\frac{2h}{t^2}-\frac{108}{t}\)question 1 the tallest person who ever lived was approximately 8 feet 11 inches tall. write an inequality that represents the heights h (in inches) of every other person who has ever lived. inequality: question 2 is 9 feet a solution of the inequality? explain your reasoning. responses no; 9 feet is equal to 118 inches, which is not less than 107 inches. no; 9 feet is equal to 118 inches, which is not less than 107 inches. yes; 9 feet is greater than or equal to 107 inches, so it is a solution of the inequality. yes; 9 feet is greater than or equal to 107 inches, so it is a solution of the inequality. no; 9 feet is equal to 108 inches, which is not less than 107 inches. no; 9 feet is equal to 108 inches, which is not less than 107 inches. yes; 9 feet is less than 107 inches, so it is a solution of the inequality question 1 the tallest person who ever lived was approximately 8 feet 11 inches tall. write an inequality that represents the heights h (in inches) of every other person who has ever lived. inequality: question 2 is 9 feet a solution of the inequality? explain your reasoning. responses no; 9 feet is equal to 118 inches, which is not less than 107 inches. no; 9 feet is equal to 118 inches, which is not less than 107 inches. yes; 9 feet is greater than or equal to 107 inches, so it is a solution of the inequality. yes; 9 feet is greater than or equal to 107 inches, so it is a solution of the inequality. no; 9 feet is equal to 108 inches, which is not less than 107 inches. no; 9 feet is equal to 108 inches, which is not less than 107 inches. yes; 9 feet is less than 107 inches, so it is a solution of the inequality
1) The height of every other person must be less than 107 inches. 2)9 feet is not a solution to inequality.
Question 1: The tallest person who ever lived was approximately 8 feet 11 inches tall. To represent the heights h (in inches) of every other person who has ever lived, we can write the inequality:
h < 107
This inequality states that the height of every other person must be less than 107 inches.
Question 2: Is 9 feet a solution to inequality?
No, 9 feet is equal to 108 inches, which is not less than 107 inches. Therefore, 9 feet is not a solution to the inequality.
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The inequality that represents the heights of every other person is h < 107 inches. 9 feet is not a solution to this inequality.
Explanation:To represent the heights of every other person who has ever lived compared to the tallest person's height of 8 feet 11 inches, we can use the inequality h < 107 inches. This inequality means that the height of every other person is less than 107 inches.
For the second question, 9 feet is equal to 108 inches, which is not less than 107 inches. Therefore, 9 feet is not a solution to the inequality h < 107 inches.
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Which describes a comparison of works
A comparison of works typically involves analyzing and contrasting two or more pieces of literature, art, music, or other creative works to identify similarities and differences.
A comparison of works is the act of analyzing and evaluating the similarities and differences between two or more pieces of literature, art, or any other creative works.
Comparing works can be done for various reasons, such as gaining a deeper understanding of the works themselves or identifying the influences that may have contributed to their creation.
In order to effectively compare works, one must first consider the elements that make up each work.
These elements may include the themes, characters, plot, style, tone, and setting, among others.
By analyzing these elements, one can begin to identify similarities and differences between the works.
When comparing works, it is important to approach each work with an open mind and avoid making assumptions based on preconceived notions or personal biases.
It is also important to consider the historical and cultural context in which each work was created, as this can greatly influence the themes and messages conveyed within the works.
This analysis may involve examining the themes, characters, plot structures, style, or other elements of the works being compared.
The goal of a comparison of works may be to gain a deeper understanding of each individual work and/or to draw connections and insights between them.
Ultimately,
A comparison of works can provide valuable insights into the creative process and the ways in which artists draw upon past works and experiences to create something new and unique.
By analyzing and evaluating the similarities and differences between works, one can gain a greater appreciation for the diversity and richness of creative expression across various genres and time periods.
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Need Help here Please!
Answer:
Step-by-step explanation:
To solve the given equation \(\sf x - y = 4 \\\), we can perform the following calculations:
a) To find the value of \(\sf 3(x - y) \\\):
\(\sf 3(x - y) = 3 \cdot 4 = 12 \\\)
b) To find the value of \(\sf 6x - 6y \\\):
\(\sf 6x - 6y = 6(x - y) = 6 \cdot 4 = 24 \\\)
c) To find the value of \(\sf y - x \\\):
\(\sf y - x = - (x - y) = -4 \\\)
Therefore:
a) The value of \(\sf 3(x - y) \\\) is 12.
b) The value of \(\sf 6x - 6y \\\) is 24.
c) The value of \(\sf y - x \\\) is -4.
\(\huge{\mathfrak{\colorbox{black}{\textcolor{lime}{I\:hope\:this\:helps\:!\:\:}}}}\)
♥️ \(\large{\underline{\textcolor{red}{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}\)
115 divided by 6 is what?? help
115 divided by 6 is 19.16
What is Division?A division is a process of splitting a specific amount into equal parts.
We need to find the solution or quotient when 115 is divided by six.
115 is the dividend.
6 is the divisor.
115/6
115 is the numerator and six is the denominator.
19.16 is the solution when 115 divided by 6 i
Hence, 115 divided by 6 is 19.16
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I need helppp please
Answer:
How pooor are you it'svery hard
Given that z is a standard normal random variable, compute the following probabilities. calculate P(1
You can approximate the probability using the standard normal distribution table by looking up the closest values for Φ(2) and Φ(1).
To calculate the probability P(1 < z < 2) for a standard normal random variable, we can use the cumulative distribution function (CDF) of the standard normal distribution.
The CDF gives us the probability that a standard normal random variable is less than or equal to a given value. We can use this information to calculate the probability between two values.
Let's denote the CDF of the standard normal distribution as Φ(z). The probability P(1 < z < 2) can be calculated as follows:
P(1 < z < 2) = Φ(2) - Φ(1)
To calculate this, we need to look up the values of Φ(2) and Φ(1) from a standard normal distribution table or use a calculator/computer software. However, since I don't have access to real-time computations in this environment, I am unable to provide the exact numerical value.
But you can use statistical software or online calculators to find the precise value. Alternatively, you can approximate the probability using the standard normal distribution table by looking up the closest values for Φ(2) and Φ(1).
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An analysis of the decay of 10 grams of an unstable element over time was completed and is displayed in the computer output.
What is the equation of the least-squares regression line?
A. Element = 2.305 - 0.101 In(Time)
B. In(Element) = 2.305 - 0.101(Time)
C. In(Element) = -0.101 + 2.305(Time)
D. In(Time) = -0.101 + 2.305(Element)
The equation of the least-squared regression line is: In(Element) = 2.305 - 0.101(Time).
What is a regression line?A regression line displays the connection between scattered data points in any set. It shows the relation between the dependent y variable and independent x variables when there is a linear pattern.
According to the given problem,
From the table we can see,
ln(Element) is the dependent variable and Time is the independent variable.
The constant = 2.305,
Time = -0.101
Hence, we can conclude, our least squared regression line will be
In (Element) = 2.305 - 0.101 (Time).
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HELP PLEASE!! I NEED ANSWER SOON!!!!!
Which of the following is true about the expression sqrt3*sqrt12?
A.It represents the product of two irrational numbers and is equivalent to a rational number.
B.It represents the product of two irrational numbers and is equivalent to an irrational number.
C.It represents the product of two rational numbers and is equivalent to a rational number.
D.It represents the product of two rational numbers and is equivalent to an irrational number.
Answer:
A. is correct
Step-by-step explanation:
sqrt3*sqrt12 can be rewritten as √3·√12, which can be extended to
√3·√3·√4.
Note that √4 = 2 and that (√3)^2 = 3,
so the final result is 2*3, or 6 (a rational number).
A. is correct: √3 and √12 are both irrational, but their product is rational.
The LCD for adding the fractions 1/5 + 1/10 is 10.
True
False
Answer:
true
Step-by-step explanation:
Answer: false
Step-by-step explanation:
Evaluate 6k − j2 + 2k ÷ l when j = 5, k = 12, and l = 3.
The solution is, the value of 6k − j^2 + 2k ÷ l when j = 5, k = 12, and l = 3, is 13.
What is simplification?Simplify simply means to make it simple. In mathematics, simply or simplification is reducing the expression/fraction/problem in a simpler form. It makes the problem easy with calculations and solving.
here, we have,
given that,
6k − j^2 + 2k ÷ l
now, we have to simplify the given expression, using multiplication , division, addition & subtraction , as per the BODMAS rule.
so, we get,
6k − j^2 + 2k ÷ l
when j = 5, k = 12, and l = 3.
putting the values, we get,
30 - 25 +24 /3
=30 -25 + 8
=5+ 8
=13
Hence, The solution is, the value of 6k − j^2 + 2k ÷ l when j = 5, k = 12, and l = 3, is 13.
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if w=f(u, v) where u=x+y and v=x-y Prove that =\frac{\partial w}{\partial x} \cdot \frac{\partial \omega}{\partial y}=\left(\frac{\partial w}{\partial u}\right)^{2}-\left(\frac{\ppartial w}{\partial v}\right)^{2
"
It is proven that the given equation:
\((∂w/∂x) * (∂w/∂y) = (∂f/∂u)^2 - (∂f/∂v)^2\)
How did we get the value?To prove the given equation, let's start by finding the partial derivatives of w with respect to x and y.
Given:
w = f(u, v) --- (1)
u = x + y --- (2)
v = x - y --- (3)
We need to find:
∂w/∂x --- (4)
∂w/∂y --- (5)
To find ∂w/∂x, we can use the chain rule. Differentiating equation (1) with respect to u and v, we get:
∂w/∂u = ∂f/∂u --- (6)
∂w/∂v = ∂f/∂v --- (7)
Now, differentiating equation (2) with respect to x and y:
∂u/∂x = 1 --- (8)
∂u/∂y = 1 --- (9)
Differentiating equation (3) with respect to x and y:
∂v/∂x = 1 --- (10)
∂v/∂y = -1 --- (11)
Next, using the chain rule, we can find ∂w/∂x:
\(∂w/∂x = (∂w/∂u) * (∂u/∂x) + (∂w/∂v) * (∂v/∂x)
= (∂f/∂u) * 1 + (∂f/∂v) * 1
= ∂f/∂u + ∂f/∂v\)
Similarly, let's find ∂w/∂y using the chain rule:
\(∂w/∂y = (∂w/∂u) * (∂u/∂y) + (∂w/∂v) * (∂v/∂y)
= (∂f/∂u) * 1 + (∂f/∂v) * (-1)
= ∂f/∂u - ∂f/∂v\)
Now, let's substitute the values of ∂w/∂x and ∂w/∂y into the equation we need to prove:
\((∂w/∂x) * (∂w/∂y) = (∂f/∂u + ∂f/∂v) * (∂f/∂u - ∂f/∂v)
= (∂f/∂u)^2 - (∂f/∂v)^2\)
Therefore, we have proven that
\((∂w/∂x) * (∂w/∂y) = (∂f/∂u)^2 - (∂f/∂v)^2\)
, which is the equation we wanted to prove.
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The complete question goes thus:
\(if w=f(u, v) where u=x+y and v=x-y Prove that =\frac{\partial w}{\partial x} \cdot \frac{\partial \omega}{\partial y}=\left(\frac{\partial w}{\partial u}\right)^{2}-\left(\frac{\partial w}{\partial v}\right)^{2}
"\)
2. Let 2 1 0 6---8 and A: = 1 3 1 01 2 (a) Apply the power method to A to compute V₁, U₁, V2, u 2, and v3. (Round off to two decimal places.) (b) Determine an approximation to the largest eigenval
The largest eigenvalue of matrix A, λₘₐₓ, is approximately 3.16.
To apply the power method to matrix A, we start with an initial vector v₀ and iterate the following steps until convergence:
(a) Power Method:
Choose an initial vector v₀.
For k = 1, 2, 3:
a. Compute uₖ = Avₖ.
b. Compute vₖ = uₖ / ||uₖ||, where ||uₖ|| is the Euclidean norm of uₖ.
Repeat step 2 until convergence.
(b) Approximating the Largest Eigenvalue:
After convergence, the vector vₖ will be an approximation of the eigenvector corresponding to the largest eigenvalue.
To approximate the largest eigenvalue, λₘₐₓ, we compute λₘₐₓ ≈ (Avₖ)⋅vₖ, where (Avₖ)⋅vₖ denotes the dot product of Avₖ and vₖ.
Let's apply the power method to matrix A:
Step 1:
Choose an initial vector v₀ = [2, 1, 0, 6]ᵀ.
Step 2:
For k = 1:
a. Compute u₁ = Av₀ = [1(2) + 3(1) + 1(0) + 0(6), 0(2) + 1(1) + 1(0) + 2(6)]ᵀ = [5, 13]ᵀ.
b. Compute v₁ = u₁ / ||u₁|| = [5/sqrt(5² + 13²), 13/sqrt(5² + 13²)]ᵀ ≈ [0.37, 0.93]ᵀ.
For k = 2:
a. Compute u₂ = Av₁ = [1(0.37) + 3(0.93) + 1(0) + 0(6), 0(0.37) + 1(0.93) + 1(0) + 2(6)]ᵀ ≈ [4.44, 13.73]ᵀ.
b. Compute v₂ = u₂ / ||u₂|| = [4.44/sqrt(4.44² + 13.73²), 13.73/sqrt(4.44² + 13.73²)]ᵀ ≈ [0.32, 0.95]ᵀ.
For k = 3:
a. Compute u₃ = Av₂ = [1(0.32) + 3(0.95) + 1(0) + 0(6), 0(0.32) + 1(0.95) + 1(0) + 2(6)]ᵀ ≈ [4.46, 13.94]ᵀ.
b. Compute v₃ = u₃ / ||u₃|| = [4.46/sqrt(4.46² + 13.94²), 13.94/sqrt(4.46² + 13.94²)]ᵀ ≈ [0.32, 0.95]ᵀ.
The vectors obtained after the third iteration, v₃ ≈ [0.32, 0.95]ᵀ, are the approximations of the eigenvector corresponding to the largest eigenvalue.
To approximate the largest eigenvalue:
λₘₐₓ ≈ (Av₃)⋅v₃ = ([1, 3, 1, 0, 2]⋅[0.32, 0.95]ᵀ) ≈ 3.16.
The largest eigenvalue of matrix A, λₘₐₓ, is approximately 3.16.
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for every 1-kilometer increase in altitude, the temperature drops 7 degrees Celsius. Find the temperature change from a 5-kilometer altitude increase.
The temperature change from a 5 - kilometer altitude increase is 35 degrees.
It is given in the question that for every 1-kilometer increase in altitude, the temperature drops 7 degrees Celsius.
We have to find the temperature change from a 5-kilometer altitude increase.
As, for 1 km altitude increase, the temperature drops by 7 degrees, hence by using unitary method, we can say that,
For 5 km altitude increase, the temperature will decrease by 7*5 = 35 degrees.
Unitary Method
The unitary method is generally a way of finding out the solution of a problem by initially finding out the value of a single unit, and then finding out the essential value by multiplying the single unit value.
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