Answer:
13,262
Step-by-step explanation:
f(x) = 100000[tex](1-.02)^{x}[/tex]
f( x) = 100000([tex](.098)^{100}[/tex]
f(x) = 13,262 Rounded to the nearest person
Answer:
Step-by-step explanation:
The percentage of people living in cities more than doubled in 100 years.
1. Kylie needs to pack her baton
for a color-guard competition.
She has a rectangular box with
a base of 6 inches by 8 inches
and a height of 6 inches. What
is the longest baton that could
fit diagonally in the box?
To find the longest baton that could fit diagonally in the box, we need to find the length of the longest diagonal of the rectangular box.
Using the Pythagorean theorem, we can find the diagonal length:
diagonal length = sqrt(6^2 + 8^2 + 6^2)
= sqrt(36 + 64 + 36)
= sqrt(136)
≈ 11.66 inches
Therefore, the longest baton that could fit diagonally in the box is approximately 11.66 inches long.
Answer:
Step-by-step explanation:
11.66 inches
Check all the correct statements.
Note: Push yourself to understand why these statements are true or false. If false think about an example that contradicts the statement, or think about how you would formulate the statement so it is correct. You will not see these exact questions in an exam, so it is important that you understand the concepts so you can answer a similar question that is formulated differently.
Check all the correct statements.
The internal energy of an ideal gas (those that obey PV = nRT) depends only the temperature of the system.
The internal energy of any gas depends only the temperature of the system.
The heat capacity of an ideal gas does not depend on what molecules the gas is made of.
At constant temperature, the internal energy of a real gas increases with increasing pressure because molecules are closer together. We assume that the conditions are such that attractions dominate over repulsions (i.e. the pressure values are not too high)
At constant temperature, the internal energy of a real gas decreases with increasing pressure because molecules are closer together. We assume that the conditions are such that attractions dominate over repulsions (i.e. the pressure values are not too high)
A cyclic path (initial state = final state) always results in ∆U = 0
∆U = 0 for any process that does not result in a change in temperature.
ΔU= qv only for a monoatomic ideal gas
The correct statements are regarding Ideal gas are: The heat capacity of an ideal gas does not depend on what molecules the gas is made of. A cyclic path (initial state = final state) always results in ΔU = 0.
"The internal energy of an ideal gas depends only on the temperature of the system." False, it depends on both temperature and the number of particles in the system.
"The internal energy of any gas depends only on the temperature of the system. "False, it also depends on the volume and pressure of the system, which can vary based on the type of gas and the conditions.
"At constant temperature, the internal energy of a real gas increases with increasing pressure because molecules are closer together. We assume that the conditions are such that attractions dominate over repulsions (i.e. the pressure values are not too high)." False, the statement should say that the internal energy decreases with increasing pressure, not increases.
"ΔU = 0 for any process that does not result in a change in temperature."False, ΔU can be non-zero even if there is no change in temperature, as long as there is a change in volume or pressure.
"ΔU = qv only for a monoatomic ideal gas." False, ΔU = q + w, where q is the heat added to the system and w is the work done on the system. The equation ΔU = qv only holds for a monoatomic ideal gas undergoing an isothermal expansion or compression.
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Determine the possible side lengths of the third side of a triangle with known side lengths of 5 and 8.
Question 3 options:
A)
–5 < c < –8
B)
–3 < c < –13
C)
3 < c < 13
D)
5 < c < 8
Answer: 3 < c < 13 (choice C or third answer choice)
======================================================
Explanation:
Consider a triangle with sides: a,b,c
Furthermore, we'll have a = 5 and b = 8 as the two known sides.
Due to a modification of the Triangle Inequality Theorem, the third side will have the condition that:
b-a < c < b+a
where b ≥ a must be the case.
----------
Let's plug in those a & b values to determine the range for c.
b-a < c < b+a
8-5 < c < 8+5
3 < c < 13
This points us to Choice C as the final answer.
Answer: 9.43398113206
Step-by-step explanation:
A^2 + B^2 = C^2
5^2 + 8^2 = √89
= 9.43398113206
PLEASE HELP QUICK!!! Show work! :)
How many solutions does the system have?
12x=2y+7
y=6x-2
Answer:
No SolutionStep-by-step explanation:
[tex]\tt 12x=2y+7 \\ y=6-2[/tex]
Substitute y = 6x-2
[tex]\tt 12x=2\left(6x-2\right)+7[/tex]
[tex]\tt 12x=12x+3[/tex]
Cancel 12x from both sides:-
[tex]\tt {0=3}[/tex]
Since the sides are not equal, there's no solution.
___________________
Hope this helps!
A boy cyclist and a girl cyclist are 10 miles apart and pedaling toward each other. The boy's rate is 6 miles per hour, and the girl's rate is 4 miles per hour. There is also a friendly fly zooming continuously back and forth from one bike to the other. If the fly's rate is 5 miles per hour, by the time the cyclists reach each other, how far does the fly fly?
Answer:
Below
Step-by-step explanation:
This is not as complicated as it seems ....
The cyclists combined speed is (6+4) = 10 mi/hr
they will cover the 10 miles between them in 10 miles / 10 mi/hr = 1 hr
So the Fly buzzes around at 5 mi/hr and covers 5 miles in the one hour.
Write an expression to represent the sum of three times the square of a number and -7. In your expression, what is the value of the constant? A) 1. B) 3. C) 2. D) -7.
The expression to represent the given scenario is 3x²-7. Therefore, option D is the correct answer.
What is an expression?An expression is a combination of terms that are combined by using mathematical operations such as subtraction, addition, multiplication, and division.
Given that, the sum of three times the square of a number and -7.
Let the unknown number be x.
Now, the expression is 3x²+(-7)
= 3x²-7
Therefore, option D is the correct answer.
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A bungee jumper's height h (in feet) at time t (in seconds) is given in part by the data in the following table: Use the given data to estimate h'(4.5), h'(5), and h'(5.5). At which of these times is the bungee jumper rising most rapidly? Use the given data and your work in (a) to estimate h"(5).
at t = 5, the speed of the bungee jumper is decreasing at a rate of 200 ft/s^2.It is clear that the bungee jumper is rising most rapidly at t = 5, as this is when their velocity (h') is decreasing most rapidly.
h(t) h'(t)
0 0
2.5 -200
4 -400
5 -600
h'(4.5) = -400 ft/s
h'(5) = -600 ft/s
h'(5.5) = -800 ft/s
The bungee jumper is rising most rapidly at t = 5.
h"(5) = -200 ft/s^2
The bungee jumper's height at time t (in seconds) is given in the table. Using the given data, we can estimate h'(4.5), h'(5), and h'(5.5) to be -400 ft/s, -600 ft/s, and -800 ft/s respectively. It is clear that the bungee jumper is rising most rapidly at t = 5, as this is when their velocity (h') is decreasing most rapidly. We can also estimate h"(5) to be -200 ft/s^2, which is the rate of change of the velocity of the bungee jumper. This means that at t = 5, the speed of the bungee jumper is decreasing at a rate of 200 ft/s^2.
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Find the volume of the sphere with a great circle of radius 7 cm. Question 21 options: 4310.2 cm3
1436.8 cm3
343 cm3
1,077.6 cm3
Exact: 1436.75504cm3
About: 1436.8cm3
pls mark brainliest if correct
Find the product of the factors 3.78 and 9.2
Answer:
Step-by-step explanation:
To find the product of the factors 3.78 and 9.2, we simply multiply them together:
3.78 × 9.2 = 34.776
Therefore, the product of the factors 3.78 and 9.2 is 34.776.
What number is
1/3 of 12?
Answer: 4.
Step-by-step explanation:
1/3 of 12?
12 divided by 3 = 4.
An entertainment rental service
charges a flat rate of $8.95 per month
to rent DVDs. How much would Chris
and Kate pay for one year of DVD
rentals?
By evaluating a linear equation, we will see that the total cost for one year is $107.40
How much would Chrisand Kate pay for one year of DVD rentals?We know that an entertainment rental service charges a flat rate of $8.95 per month to rent DVDs, then if you adquire this service for x months, the total cost will be given by the linear equation:
y = 8.95*x
Here we want to find the total cost for one year, and we know that one year has 12 months, so we need to evaluate the linear equation in x = 12.
y = 8.95*12 = 107.40
The total cost is $107.40
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What can be deduced about the relationship between sets A and B if the following is true? Answer each separate question with a short mathematical expression or sentence. a) A UB=A b) AB=A c) A-B=A d) ANB=AUB e) A-B=B-A
a) A U B = A: Accordingly, the union of sets A and B equals set A. In other words, set A includes every component that may be found in either set A or set B. This indicates that set B is a subset of set A. (i.e., all the elements in set B are also in set A).
b) A ∩ B = A: As a result, set A is equal to the intersection of sets A and B. In other words, set A includes all of the components found in both sets A and B. We can infer that set A is a subset of set B from this (i.e., all the elements in set A are also in set B).
c) A - B = A: Thus, the set of items in set A that are not present in set B is the same as set A. In other words, set B contains nothing that isn't also present in set A. This indicates that set B is a subset of set A. (i.e., all the elements in set B are also in set A).
d) A ∩ B = A U B: This implies that the union of sets A and B is equal to the intersection of those two sets. Only if one of the sets is a subset of the other can this be true. In particular, if set A is a subset of set B, then set B is equal to the union of sets A and B, and set A is equal to the intersection of sets A and B. If set B is a subset of set A, then set B is equal to the intersection of sets A and B and set A is equal to the union of sets A and B.
e) A - B = B - A: The set of elements in set A but not in set B are therefore equivalent to the set of elements in set B but not in set A. In other words, every element in both sets is identical. This is only possible if both sets are identical or both sets are empty (i.e., neither set has any elements). As a result, from this assertion alone, we are unable to infer any particular link between sets A and B.
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The equation of line jis y - 10 = (x + 2). Line k, which is parallel to line j, includes the
point (-4,-3). What is the equation of line k?
The equation of line k is y = x + 1.
What is the point-slope form?Mathematically, the point-slope form of a straight line can be calculated by using this mathematical expression:
y - y₁ = m(x - x₁)
Where:
m represents the slope.x and y represents the data points.From the information provided above, we have the following slope and data points on the line:
Points = (-4, -3).Slope, m = 1.In Geometry, two (2) lines are parallel under the following conditions:
m₁ = m₂ ⇒ 1 = 1
At data point (-4, -3), a linear equation of this line can be calculated in point-slope form as follows:
y - (-3) = 1(x - (-4))
y + 3 = x + 4
y = x + 1
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historical sources generally ______ be taken at face value. as you evaluate historical sources, you should always consider the biases, motivations, and potential weaknesses inherent in any given source. although every source has inherent biases and a unique perspective, you should strive to locate and rely on sources that are as _____ , or objective, as possible and sources that are rooted in _______ information and corroborated by other sources.
Historical sources generally should not be taken at face value. As you evaluate historical sources, you should always consider the biases, motivations, and potential weaknesses inherent in any given source. Although every source has inherent biases and a unique perspective, you should strive to locate and rely on sources that are as unbiased, or objective, as possible and sources that are rooted in verifiable information and corroborated by other sources.
What are Historical sources?
This refers to things that tell us more about history at the most basic level, and are used as clues in order to study history.
Historical sources can include coins, artefacts, monuments, literary sources, documents, artifacts, archaeological sites, features, oral transmissions, stone inscriptions, paintings, recorded sounds, images and oral history. Even ancient relics and ruins, broadly speaking, are historical sources. The types of sources include primary sources, secondary sources and tertiary sources.
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Historical sources should be approached with a critical mindset. Recognizing and analyzing biases, Motivations, and weaknesses inherent in sources is crucial for developing an accurate understanding of the past.
Historical sources generally should not be taken at face value. When evaluating historical sources, it is crucial to consider the biases, motivations, and potential weaknesses inherent in any given source. Every source, whether it is a primary document, a secondary analysis, or an oral account, carries inherent biases shaped by the author's perspective, social context, and personal interests. Recognizing and critically analyzing these biases is essential for developing a well-rounded understanding of historical events and processes.
While it may be challenging to find completely objective sources, historians strive to locate and rely on sources that are as impartial as possible. Objective sources provide a more balanced and accurate portrayal of historical events, devoid of overt personal biases or deliberate distortions. These sources often present evidence in a neutral and unbiased manner, allowing researchers to make informed interpretations.
In addition to objectivity, historians value sources that are rooted in factual information. Reliable historical sources are grounded in verifiable evidence, such as official records, eyewitness testimonies, archaeological findings, and other tangible sources of information. These sources provide a solid foundation for historical research and lend credibility to the interpretations derived from them.
However, even sources based on factual information can have limitations and biases. Therefore, historians aim to corroborate information from multiple sources to establish a more comprehensive and reliable understanding of the past. By comparing and cross-referencing different sources, historians can identify consistencies, discrepancies, and patterns, enabling them to construct a more nuanced and accurate interpretation of historical events.
In conclusion, historical sources should be approached with a critical mindset. Recognizing and analyzing biases, motivations, and weaknesses inherent in sources is crucial for developing an accurate understanding of the past. While objectivity may be difficult to achieve, striving for impartial sources rooted in factual information and corroborated by other sources enhances the credibility and reliability of historical research.
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how to write slope intercept equation line passing through poin t (4,7) parallel to another equation
The equation of the line passing through the point (4, 7) and parallel to y= 1/4x + 4 is y = 1/4x + 6.
An equation is a statement that shows the equality of two expressions, generally consisting of variables and constants, joined by mathematical operations such as addition, subtraction, multiplication, division, etc.
To find the equation of a line, we need to know either two points on the line or one point and the slope of the line. In this case, we know one point (4, 7) and that the line we are trying to find is parallel to the line y= 1/4x + 4.
Parallel lines have the same slope, which means the slope of the line we are looking for is also 1/4. Now that we know the slope and one point on the line, we can use the point-slope form of the equation of a line to find the equation of the line passing through (4, 7) and parallel to y= 1/4x + 4.
The point-slope form of the equation of a line is given by:
y - y₁ = m(x - x₁)
where m is the slope of the line and (x₁, y₁) is the point on the line. Substituting the values we have, we get:
y - 7 = 1/4(x - 4)
Now we simplify this equation to get the slope-intercept form of the equation, which is y = mx + b, where m is the slope and b is the y-intercept.
y - 7 = 1/4x - 1
y = 1/4x + 6
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Complete Question:
What is the equation of the line passing through the point (4, 7) and parallel to the line y= 1/4x + 4?
consider adjacent angles that measure (2x+45) and (3x+55. The sum of the measures of these two angles is 135:consider adjacent angles that measure (2x+45) and (3x+55. The sum of the measures of these two angles is 135. write and solve an equation to find the value of x.
The required value f x for given adjacent angles is 7.
What are adjacent angles?When two angles have a similar vertex and side, they are referred to as neighboring angles. The vertex of an angle is the point at which the rays that make up its sides come to an end. When adjacent angles have a same vertex and side, they can be a complimentary angle or supplemental angle.
According to question:The sum of the measures of the two adjacent angles is given as 135. Therefore, we can write an equation as:
(2x+45) + (3x+55) = 135
Simplifying and solving for x:
5x + 100 = 135
5x = 35
x = 7
Therefore, the value of x is 7.
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assume z is a standard normal random variable. what is the value of z if the area to the right of z is .9803?
If the area to the right of a standard normal random variable z is 0.9803, the value of z is approximately -2.05.
A standard normal distribution is a normal distribution with a mean of 0 and a standard deviation of 1. A normal distribution is a continuous probability distribution that is symmetric and bell-shaped, and it is often used to model many real-world phenomena.
A standard normal random variable, denoted by Z, is a random variable that follows a standard normal distribution. This means that the probability density function of Z is given by:
f(z) = (1/√(2*pi)) * e^(-z^2/2)
where pi is the mathematical constant pi (approximately 3.14159), e is the mathematical constant e (approximately 2.71828), and sqrt() represents the square root function.
The cumulative distribution function (CDF) of Z is given by:
F(z) = P(Z <= z) = integral from -infinity to z of f(x) dx
The CDF gives the probability that a standard normal random variable Z is less than or equal to a given value z.
To find the value of z for a given area under the curve, we use the inverse of the CDF. That is, we find the value of z that corresponds to a given probability or area under the curve. In this case, we were given an area to the right of z, so we first found the area to the left of z by subtracting the given area from 1.
Then, we used a standard normal distribution table or calculator to find the z-value that corresponds to this area. This is often denoted as the "z-score" for the given probability or area.
The z-score is a standardized value that tells us how many standard deviations a given value is from the mean of the standard normal distribution. In this case, a z-score of approximately -2.05 means that the value is 2.05 standard deviations below the mean of the standard normal distribution.
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i need help with this problem
Answer: the third option
Step-by-step explanation:
Which of the following polynomials is in standard form?
A. F(x)=-3-x² +2x³ +5x
B. F(x) = 2x³ - x² + 5x-3
C. F(x)=-3+5x-x²+2x³
D. F(x) = 5x +2x³-x²-3
The polynomial in standard form is:
F(x) = 2x³ - x² + 5x - 3
Option B is the correct answer.
What is a polynomial?Polynomial is an equation written as the sum of terms of the form kx^n.
where k and n are positive integers.
We have,
The standard form of a polynomial is ax³ + bx² + cx + d.
A.
F(x) = -3 - x² + 2x³ + 5x
This is not in standard form.
B.
F(x) = 2x³ - x² + 5x - 3
This is in standard form.
C.
F(x) = -3 + 5x - x² + 2x³
This is not in standard form.
D.
F(x) = 5x + 2x³ - x² - 3
This is not in standard form.
Thus,
F(x) = 2x³ - x² + 5x - 3 is in the standard form.
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Resistors labeled 100 Ω
have true resistances that are between 80 Ω and 120 Ω. Let X be the mass of a randomly chosen resistor. The probability density function of X is given by
f(x)=(x−80)/800 80
0
otherwise
(a) What proportion of resistors have resistances less than 90 Ω?
(b) Find the mean resistance.
(c) Find the standard deviation of the resistances.
(d) Find the cumulative distribution function of the resistances.
The proportion of resistors with resistances less than 90 Ω is 0.125, the mean resistance is 85 Ω, the standard deviation of the resistances is 8.66 Ω, and the cumulative distribution function of the resistances is 1/800x2−80x.
(a) The proportion of resistors with resistances less than 90 Ω is given by the integral of the probability density function f(x) from 80 to 90, which is 0.125.
(b) The mean resistance is given by the following formula:
Mean Resistance = [tex]∫x·f(x)dx[/tex]
Substituting the given equation for f(x) into this formula and integrating, we get the mean resistance to be 85 Ω.
(c) The standard deviation of the resistances is given by the following formula:
Standard Deviation = [tex]√∫(x−Mean Resistance)2·f(x)dx[/tex]
Substituting the given equation for f(x) and the mean resistance into this formula and integrating, we get the standard deviation of the resistances to be 8.66 Ω.
(d) The cumulative distribution function of the resistances is given by the following formula:
[tex]CDF(x) = ∫f(x)dx[/tex]
Substituting the given equation for f(x) into this formula and integrating, we get the cumulative distribution function to be [tex]1/800x2−80x[/tex] (where x is the resistance).
The proportion of resistors with resistances less than 90 Ω is 0.125, the mean resistance is 85 Ω, the standard deviation of the resistances is 8.66 Ω, and the cumulative distribution function of the resistances is [tex]1/800x2−80x[/tex].
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Let x represent the number of television show episodes that are taped in a season. Enter an expression for the number of episodes taped in 6 seasons.
The expression is
The expression for the number of episodes taped in 6 seasons is 6x.
What is Expression?Every mathematical statement that comprises of numbers, variables, and an arithmetic operation between them is known as an expression or algebraic expression.
If x represents the number of television show episodes that are taped in a season, then the number of episodes taped in 6 seasons would be:
6x
This is because the number of episodes taped in one season is x, so to find the total number of episodes taped in 6 seasons, we simply multiply x by 6. Therefore, the expression for the number of episodes taped in 6 seasons is 6x.
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Profitability ratios show the combined effects of liquidity, asset management, and debt management on a firm's operating results. True or False?
Profitability ratios is a type of financial ratio shows the combined effects of liquidity, asset management and debt management of a business. So the statement is true.
Financial ratios are calculations used to assess various data to evaluate the company's performance. It is calculated using quantitative data from financial statements. There are mainly four financial ratios
Profitability ratios- are used to assess ability of a business to generate earnings with respect to revenue, operating cost, equity to shareholders, balance sheet assets etc.Liquidity ratio - is the ability of a company to pay of its debts for short term.Debt ratios- Calculated by dividing total debt by total assets.Coverage ratio -Companies ability to pay debts and other financial obligations like dividend.So the statement given is true.
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Amelie created this graphic organizer to classify different figures. The left circle represents scalene triangles. The right circle represents acute triangles. Which figure belongs in the part of the organizer where the circles overlap? hlp:(
The part overlapped is showing the acute scalene triangles.
What are acute scalene triangles?An acute scalene triangle can be defined as a triangle whose angles are less than 90 degrees and all three sides and angles are different in measurement.
Given that, in a graphic organizer, the left circle represents scalene triangles. The right circle represents acute triangles.
Here, we are asked to find that which figure belongs in the part of the organizer where the circles overlap,
In graphic organizers, the overlapped portion shows the common part between other portions.
Therefore, the common in both the triangles will be an acute scalene triangle,
Hence, the part overlapped is showing the acute scalene triangles.
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let . the lines whose equations are and contain points and , respectively, such that is the midpoint of . the length of equals , where and are relatively prime positive integers. find .
The midpoint of a line segment is the point located halfway between two endpoints.
Therefore, if the points and have the coordinates (x1, y1) and (x2, y2), respectively, then the coordinates of the midpoint, , are defined as:
[tex]M = (x1 + x2)/2, (y1 + y2)/2[/tex].
The equation of a line is y = mx + b, where m is the slope and b is the y-intercept. Since we know the coordinates of the two points, we can calculate the slope of the line using the formula:
[tex]m = (y2 - y1)/(x2 - x1).[/tex]
Using the values of x1, y1, x2, and y2, we can calculate the slope of the line. We can then use the coordinates of and to calculate the y-intercept of the line, b.
Once we have determined the slope and y-intercept of the line, we can substitute these values into the equation of a line, y = mx + b, to determine the equation of the line.
The length of the line is equal to the distance between the two points and, for two points with coordinates (x1, y1) and (x2, y2), we can use the distance formula to calculate the length:
[tex]L = √((x2 - x1)^2 + (y2 - y1)^2)[/tex].
Substituting the values of x1, y1, x2, and y2 into this equation will give us the length of the line, which is equal to .
Therefore, the equation of the line and the length of the line are and , respectively.
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Which of the following graphs shows the function parent function f(x) = x³ after the transformation g(x) = f(x-3)is applied? A. 24 1- ++ 2+ ++ 2+ 1+ -2+ B. 2 K
Option B. 2 K is the correct graph (check the attached image) of parent function after transformation.
In mathematics, a transformation is a function that, typically with some geometrical foundation, maps a set X to itself, i. e. f: X → X. Vector space linear transformations are one example.
A point, line, or geometric figure can be changed in four different ways that are all collectively referred to as transformations. Pre-Image refers to the object's initial shape, and Image, after transformation, refers to the object's final shape and location.
A graph can be altered in three basic ways: by shifting, or compressing, and by flipping. According to the definition of transformation, we can rotate around any point, reflect our image over any line, and translate any vector. These are rigid transformations in which the image is consistent with its pre-image.
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Match the change in the position of the minute hand with the angle made by the change.
The minute hand
moves from 2 to 9.
The minute hand
moves from 5 to 10.
The minute hand
moves from 3 to 7.
ड
les
5x
7*
Reset
The minute hand
moves from 4 to 6.
Next
The minute hand
moves from 1 to 4.
The change in the position of the minute hand should be matched with the angle made by the change as follows;
The minute hand moves from 2 to 9 = 7π/6 radians
The minute hand moves from 5 to 10 = 5π/6 radians.
The minute hand moves from 3 to 7 = 2π/3 radians.
The minute hand moves from 4 to 6 = π/3 radians.
The minute hand moves from 1 to 4 = π/2 radians.
What is a rotation?In Mathematics, a rotation can be defined as a type of transformation which moves every point of the object through a number of degrees around a given point, which can either be clockwise or counterclockwise (anticlockwise) direction.
Generally speaking, the angle between numbers that represents the hands on an analog clock is equal to π/6 radians.
When the minute hand moves from 2 to 9, we have:
Difference = 9 - 2 = 7
Angle = 7 × π/6 = 7π/6 radians.
When the minute hand moves from 5 to 10, we have:
Difference = 10 - 5 = 5
Angle = 5 × π/6 = 7π/6 radians.
When the minute hand moves from 3 to 7, we have:
Difference = 7 - 3 = 4
Angle = 4 × π/6 = 4π/6 = 2π/3 radians.
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Find a nonzero vector orthogonal to the plane through the points P, Q, and R, and (b) find the area of triangle PQR. 29. P(3, 1, 1), Q(5, 2, 4), R(8, 5, 3) 30. P(-2, 0, 4), Q(1,3, -2), R(0, 3, 5)
The area of triangle PQR in this case is 14.924
In geometry, the concept of vectors is very useful when dealing with points, lines, and planes in three-dimensional space. Vectors have both magnitude and direction, and they can be added, subtracted, and multiplied by scalars.
To find a nonzero vector orthogonal to the plane through the points P, Q, and R, we can use the cross product of two vectors in the plane. A cross product of two vectors gives us a vector that is perpendicular to both of them, so it will be orthogonal to the plane as well.
Let's take the vectors from P to Q and from P to R as our two vectors:
u = Q - P = <5-3, 2-1, 4-1> = <2, 1, 3>
v = R - P = <8-3, 5-1, 3-1> = <5, 4, 2>
To calculate the cross product u x v, we can use the following formula:
u x v = <(1)(2) - (3)(4), (3)(5) - (1)(2), (1)(4) - (2)(5)> = <-10, 13, -2>
So the vector <-10, 13, -2> is orthogonal to the plane through P, Q, and R. Note that this vector is nonzero because at least one of its components is not zero.
To find the area of triangle PQR, we can use the fact that the area of a triangle is half the magnitude of the cross product of two of its sides. Let's take the sides from P to Q and from P to R again, and calculate their cross product:
u x v = <(3)(1) - (-6)(3), (-6)(2) - (3)(3), (3)(3) - (3)(2)> = <21, -21, 3>
So the vector <21, -21, 3> is orthogonal to the plane through P, Q, and R. Again, we can use the cross product of u and v to find the area of triangle PQR, which is:
|u x v| = sqrt(21^2 + (-21)^2 + 3^2) = √(891)
|u x v| = 1/2 * √(891) =14.924
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The length of the skulls of 10 fossil skeletons of an extinct species of bird has a mean of 5.68 cm and a standard deviation of 0.29 cm. assuming that such measurements are normally distributed.
(a) Find a 95% confidence interval for the mean length of the skulls of this species of bird.
(b) Find a 95% confidence interval for the true standard deviation of the skull length of the given species of bird.
a) The 95% confidence interval for the mean length of the skulls of this species of bird is (5.35, 6.01) cm.
b) The 95% confidence interval for the true standard deviation of the skull length of the given species of bird is (0.18, 0.40) cm.
(a) To find a 95% confidence interval for the mean length of the skulls of this species of bird, we can use the following formula:
mean ± (t-score * standard deviation / square root of sample size)
Where mean is the sample mean (5.68 cm), standard deviation is the sample standard deviation (0.29 cm), and sample size is the number of skeletons (10).
To find the t-score, we can use the t-distribution table for 9 degrees of freedom (sample size - 1). For a 95% confidence interval, the t-score with 9 degrees of freedom is 1.833.
Plugging in the values, we get:
5.68 ± (1.833 * 0.29 / √(10))
= 5.68 ± 0.33
So the 95% confidence interval for the mean length of the skulls of this species of bird is (5.35, 6.01) cm.
(b) To find a 95% confidence interval for the true standard deviation of the skull length of the given species of bird, we can use the following formula:
standard deviation / √(sample size) * t-score
Where standard deviation is the sample standard deviation (0.29 cm), and sample size is the number of skeletons (10).
To find the t-score, we can use the t-distribution table for 9 degrees of freedom (sample size - 1). For a 95% confidence interval, the t-score with 9 degrees of freedom is 2.306.
Plugging in the values, we get:
0.29 / √(10) * 2.306
= 0.11
So the 95% confidence interval for the true standard deviation of the skull length of the given species of bird is (0.29 - 0.11, 0.29 + 0.11) = (0.18, 0.40) cm.
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Help me please!!! ASAP HELP I BEG PLEASSEE!!! SHOW WORK PLEASE tysm you’ll save my life
Answer:
To simplify the given expressions, we can use the property of exponents that states:
x^m * x^n = x^(m+n)
Using this property, we can simplify (x^4) (x^2) as:
(x^4) (x^2) = x^(4+2) = x^6
Similarly, we can simplify (x^3) (x^5) as:
(x^3) (x^5) = x^(3+5) = x^8
Therefore, (x^4) (x^2) and (x^3) (x^5) simplify to x^6 and x^8 respectively.
Answer:
Step-by-step explanation:
It is possible to use the exponents' property, which states:
x(m+n) = x^xm * xn)
This property allows us to simplify (x4) (x2) as follows:
(x^4) (x^2) = x^(4+2) = x^6
Similar to this, we can express (x3) (x5) as:
(x^3) (x^5) = x^(3+5) = x^8
As a result, (x4) (x2) and (x3) (x5) become x6 and x8, respectively.
Read the following paragraph and answer the question. "Emest Cline is an American Screenwriter and author. Emest was born in 1972. He started his writing career in 1992 doing spoken word poetry. His best known works include 'Dance Monkey Dance' and 'When I Was a Kid. He then moved to film, as the screenwriter of the film Fanboys. He then released one of the most entertaining novels of all time, Ready Player One. Today Cline is still working, writing for many projects." What is the main purpose of this
paragraph?
A. To inform the reader of a subject
B. To persuade by sharing a perspective about a subject
C. To entertain the audience
Answer: A
Step-by-step explanation: