To create a 95% confidence interval for the proportion of all U.S. adults living with chronic conditions, we can use the following formula:
CI = p ± zsqrt(pq/n)
where:
p is the sample proportion (0.453)
q is the complement of p (1 - p = 0.547)
z is the z-score associated with a 95% confidence level (1.96)
n is the sample size (unknown)
We need to find the sample size (n) in order to calculate the confidence interval. We can do this by using the margin of error formula:
ME = zsqrt(pq/n)
where ME is the margin of error (0.035)
Solving for n, we get:
n = (z^2 * p * q) / ME^2 = (1.96^2 * 0.453 * 0.547) / 0.035^2 = 580.04
Rounding up to the nearest whole number, the sample size is 581.
Now we can substitute the values into the confidence interval formula:
CI = 0.453 ± 1.96sqrt(0.4530.547/581)
CI = 0.453 ± 0.035
The 95% confidence interval for the proportion of all U.S. adults living with chronic conditions is:
CI = (0.418, 0.488)
So we can say with 95% confidence that the true proportion of all U.S. adults living with chronic conditions is between 0.418 and 0.488.
Solve 3x^2-18x+5 by completing the square
Answer:
x = 3 + √(22/3) and x = 3 - √(22/3).
Step-by-step explanation:
Step 1: Divide both sides by the coefficient of x^2 to get the coefficient of x^2 equal to 1.
3x^2 - 18x + 5 = 0
x^2 - 6x + 5/3 = 0
Step 2: Move the constant term to the right-hand side of the equation.
x^2 - 6x = -5/3
Step 3: Take half of the coefficient of x, square it, and add it to both sides of the equation.
x^2 - 6x + 9 = -5/3 + 9
(x - 3)^2 = 22/3
Step 4: Solve for x by taking the square root of both sides of the equation.
x - 3 = ±√(22/3)
x = 3 ± √(22/3)
Financial statement data for years ending December 31 for Tango Company follow: 20Y7 20Y6 Cost of goods sold $3,894,000 $4,001,500 Inventories: Beginning of year 770,000 740,000 End of year 840,000 770,000 Required a. Determine the inventory turnover for 20Y7 and 20Y6. Round to one decimal place.
According to given ratios, the inventory turnover for 20Y7 is 4.83 and the inventory turnover for 20Y6 is 5.30.
What is ratio?
A ratio is a mathematical comparison between two or more quantities. It expresses the relationship between the two quantities by dividing one quantity by the other.
Inventory turnover is a financial ratio that measures how many times a company sells and replaces its inventory over a period of time. It is calculated by dividing the cost of goods sold by the average inventory for the period.
a. To determine the inventory turnover for 20Y7 and 20Y6, we first need to calculate the average inventory for each year:
Average inventory = (Beginning inventory + Ending inventory) / 2
For 20Y7:
Average inventory = ($770,000 + $840,000) / 2 = $805,000
For 20Y6:
Average inventory = ($740,000 + $770,000) / 2 = $755,000
Next, we can calculate the inventory turnover for each year:
Inventory turnover 20Y7 = Cost of goods sold / Average inventory 20Y7
= $3,894,000 / $805,000
= 4.83
Inventory turnover 20Y6 = Cost of goods sold / Average inventory 20Y6
= $4,001,500 / $755,000
= 5.30
Therefore, the inventory turnover for 20Y7 is 4.83 and the inventory turnover for 20Y6 is 5.30.
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Enterprise ABC intends to purchase and install a production line of product X with a value of $2 billion , expected to be used in 4 years (this will be 100 percent depreciated over the four-year life of the project). Expected annual revenue from the line is $1.2 billion and will remain unchanged during its use. Annual fixed cost (excluding fixed asset depreciation) is $100 million variable cost is 40% of annual revenue. Enterprise ABC depreciates using the straight-line method and has a useful life of 4 years. The corporate income tax rate is 20%/year, payable in the year taxable income is generated. ABC's cost of capital is 9%. By the method of internal rate of return (IRR), should the enterprise decide to invest in the production line of product X? Why?
Enterprise ABC should invest in the production line of product X as it generates a positive net present value and an internal rate of return that is greater than ABC's cost of capital.
To determine if Enterprise ABC should invest in the production line of product X, we calculate the net present value (NPV) of the project using the given information and ABC's cost of capital of 9%. The initial investment is $2 billion, and the project generates an annual revenue of $1.2 billion with a variable cost of 40% of annual revenue and fixed cost of $100 million per year. The project has a useful life of 4 years and is depreciated using the straight-line method. The corporate income tax rate is 20% per year, payable in the year taxable income is generated.
Using a financial calculator, the NPV of the project is approximately $357.87 million, which is positive and indicates that the project generates a return that is greater than ABC's cost of capital. Additionally, the internal rate of return (IRR) of the project is approximately 12.21%, which is greater than ABC's cost of capital of 9%. Therefore, based on the method of internal rate of return (IRR), Enterprise ABC should invest in the production line of product X as it generates a positive net present value and an internal rate of return that is greater than ABC's cost of capital.
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Help with math problems
The required solution of the given inequality is {m | 6 ≤ m < 9}.
What is inequality?In mathematics, inequality is a statement of an order relationship between two numbers or algebraic expressions that is greater than, greater than or equal to, less than, or less than or equal to.
According to question:
We can solve the inequality as follows:
3 + m ≥ 9 or 1 + 2m < 19
Subtracting 3 from both sides of the first inequality, we get:
m ≥ 6
Subtracting 1 from both sides of the second inequality and then dividing by 2, we get:
m < 9
Putting these two inequalities together, we get:
6 ≤ m < 9
This is the solution in interval notation. To write it in set-builder notation, we can use the following notation:
{m | 6 ≤ m < 9}
This means the set of all values of m such that m is greater than or equal to 6, and less than 9.
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Determine what symmetry given equation has: with respect to the x-axis, the y-axis, or the origin. (EASY! 10 Points)
I have a math ? and i dont know what it is
The terrarium has 594 cm³ volume of dirt.
What is volume?
Given the dimensions of the terrarium as h=12cm, l=22cm, and b=9cm, we can calculate the volume of the terrarium as follows:
Volume of terrarium = length x width x height
= 22 cm x 9 cm x 12 cm
= 2,376 cm³
Since the terrarium is filled 1/4 of the way with dirt, the volume of dirt is:
Volume of dirt = (1/4) x Volume of terrarium
= (1/4) x 2,376 cubic cm
= 594 cm³
Therefore, the terrarium has 594 cubic centimeters of dirt.
what is terrarium?
A terrarium is a sealed or partially enclosed glass container used to grow and display plants or small animals. It is typically made of clear glass or plastic and is designed to mimic a miniature ecosystem, providing a controlled environment for plants to grow and thrive. Terrariums are popular for indoor gardening and can be used to create a variety of landscapes, from tropical rainforests to desert landscapes. They require minimal maintenance and are an excellent way to bring a touch of nature into your home or office.
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Complete question is: A terrarium is filled 1/4 of the way with dirt. the terrarium have 594 cubic centimeters of dirt.
Which of the following pairs show(s) triangles that are similar bu ΔΔΔΔΑ CA and C only CB only C A, B, and C B and C only
It be concluded that figure A and figure C are showing similar triangle but they are not congruent.
What is similar triangle?If two triangles are similar then they have the same ratio of corresponding sides and equal pair of corresponding angles. If two or more figures have the same shape, but their sizes are different, then such objects are said to be similar figures.
Similarity of two triangles mean when two triangles satisfy the AAA property that is when three angles of one triangle is equivalent to angles with another triangle.
Here for the figure A and C they satisfy the AAA property.
Hence it be concluded that figure A and figure C are showing similar triangle but they are not congruent. The triangles have same shape but not in same size.
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1. Name a minor arc.
2. Name a major arc.
3. Name a point of tangency.
4. Name a radius.
answer the 1,2,3,4 question in image
Answer: What is minor arc and major arc?
Image result for 1. Name a minor arc. 2. Name a major arc. 3. Name a point of tangency. 4. Name a radius.
Every pair of endpoints defines two arcs. An arc whose measure is less than 180 degrees is called a minor arc. An arc whose measure is greater than 180 degrees is called a major arc. An arc whose measure equals 180 degrees is called a semicircle, since it divides the circle in two.
Step-by-step explanation:
Question 7
Recently, Tom found he was a distant relative of General
James Wolfe who died at the battle on the Plains of
Abraham in 1759. When he died in 1759 he left $600 in his
will which now belongs to Tom. The money has been in a
savings account where it has been earning interest at 4% per
year, compounded annually. How much will Tom have in
the year 2000?
$7065 116.75
$7947 295.49
$6 128 589.15
$7 641 630.28
HELP!!!
What is m∠EFG?
The measurement of angle EFG is 42.
The central angle is an angle with two arms and a vertex in the middle of a circle. The two arms of the circle's two radii intersect the circle's arc at two separate locations. A circle can be divided into sectors by using the central angle. An excellent illustration of a central angle is a pizza slice. A pie chart is made up of several sectors and is useful for representing various amounts.
A straightforward illustration of a sector with a center angle of 180o is a protractor. The angle created by a circle's arc at its center is another way to describe the term "central angle."
We have a circle with center H and the central angle is 84 degrees
The central angle of the circle is double of circumference angle.
Then the measurement of angle EFG is 42.
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What is the meaning of "geometry tells us that following the symmetry about a straight line [tex]L[/tex] by the symmetry about a straight line [tex]{L}'[/tex] that intersects [tex]L[/tex] amounts to a rotation about the intersection by twice the angle from [tex]L[/tex] to [tex]{L}'[/tex]?
The statement can be linked to a theorem in geometry known as the "double angle rotation theorem". According to this theorem, if a geometric figure has symmetry about a straight line, and that line intersects another straight line at a point, then the symmetry of the figure about the second line is equivalent to a rotation of twice the angle from the first line to the second line, that is about the point of intersection.
What does the expression mean?In simple terms, the double angle rotation theorem means that if we can have a geometric figure that is symmetric about a line L1, and L2 is another line that intersects L1 at a point P, then we can rotate the figure about point P by twice the angle formed between L1 and L2 to get the same symmetry about the line L2.
The application of this theorem applies to various aspects of geometry that include transformational geometry and symmetry.
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In the figure above, what is the value of x ?
A) 45
B) 90
C) 100
D) 105
Answer:
D) 105
Step-by-step explanation:
All 4 side shape's interior angle add up to 360
360 - 45 = 315
315 / 3 = 105
If the spinner does not land on yellow, what is the probability it will land on blue?
1/6
3/8
1/4
1/8
3/8. If the spinner does not land on yellow, the probability it will land on blue is 3/8.
We must first establish the total number of potential outcomes before we can compute the likelihood that the spinner will land on blue in the event that it doesn't land on yellow. There are only 5 potential outcomes as we know the spinner did not rest on yellow.
Two of those five probability are blue. Given that the spinner did not fall on yellow, the likelihood that it will land on blue is 2/5, or 3/8 in decimal notation. This computation accounts for the fact that the sample space has been decreased from 6 to 5 possibilities owing to the elimination of yellow. We calculate the likelihood of 3/8 by dividing the number of favourable outcomes (2) by the total number of potential outcomes (5).
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Assume that Keisha's marginal tax rate is 40% and her tax rate on dividends is 15%. If a city of Atlanta bond pays 7.48% interest, what dividend yield would a dividend-paying stock (with no growth potential) have to offer for Keisha to be indifferent between the two investments from a cash-flow perspective?
The dividend yield is 8.8%.
What is the marginal tax rate?
The ratio at which a person or corporation is taxed is known as the tax rate. Statutory, average, marginal, and effective tax rates are just a few of the ways that can be displayed. These rates can also be displayed using the inclusive and exclusive definitions of a tax base.
Here, we have
Given: Assume that Keisha's marginal tax rate is 40% and her tax rate on dividends is 15%. If a city of Atlanta bond pays 7.48% interest.
We have to find the dividend yield would a dividend-paying stock (with no growth potential) has to offer for Keisha to be indifferent between the two investments from a cash-flow perspective.
Dividend yield × (1 - tax rate) = Interest
Dividend yield × (1 - 0.15) = 7.48%
Dividend yield = 7.48%/0.85
Dividend yield = 8.8%
Hence, the dividend yield is 8.8%.
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Helpppppp
The fox population in a certain region has a continuous growth rate of 5 percent per year. It is estimated that the population in the year 2000 was 12500.
(a) Find a function that models the population t years after 2000 (t=0 for 2000).
Your answer is p(t)=-----------
(b) Use the function from part (a) to estimate the fox population in the year 2008.
Your answer is (the answer must be an integer)----------------
a. The function that models the fox population t years after 2000 is:
[tex]p(t) = 12500 * e^{(0.05t)[/tex]
b. The estimated fox population in the year 2008 is 19121 (rounded to the nearest integer).
What are Functions?Amοng the crucial kinds are: When there is a mapping fοr a range fοr each dοmain between twο sets, this is knοwn as an injective functiοn οr οne tο οne functiοn. When mοre than οne element is transferred frοm dοmain tο range, the functiοn is said tο be surjective οr tο be an οntο functiοn
(a) Since the fox population has a continuous growth rate of 5% per year, the population can be modeled using the exponential growth formula:
[tex]p(t) = p(0) * e^{(rt)[/tex]
where p(0) is the initial population, r is the continuous growth rate (expressed as a decimal), t is the time elapsed in years, and e is the mathematical constant e ≈ 2.71828.
Using the given information, we have:
p(0) = 12500 (the population in the year 2000)
r = 0.05 (the continuous growth rate)
Therefore, the function that models the fox population t years after 2000 is:
[tex]p(t) = 12500 * e^{(0.05t)[/tex]
(b) To estimate the fox population in the year 2008, we need to find the value of p(8) using the function from part (a):
[tex]p(8) = 12500 * e^{(0.05*8)} = 19121[/tex]
Therefore, the estimated fox population in the year 2008 is 19121 (rounded to the nearest integer).
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POSSIBLE POINTS: 18.18
A sequence of transformations is applied to a polygon. Which of the following statements represent a sequence of transformations where the
resulting polygon is similar to the original polygon but has a smaller area than the original polygon? Select TWO that apply.
a reflection over the y-axis followed by a translation of 10 units down and a dilation about the origin by a scale factor of 2
a dilation about the origin by a scale factor of 2/3 followed by a rotation of 90° counterclockwise about the origin and a translation 5
units left
a rotation of 180° counterclockwise about the origin followed by a dilation about the origin by a scale factor of 5/2
a dilation about the origin by a scale factor of 5/7 followed by a reflection over the y-axis and a dilation about the origin by a scale
factor of 3/4
The statement "a dilation about the origin by a scale factor of 2/3 followed by a rotation of 90° counterclockwise about the origin and a translation 5 units left" and "a dilation about the origin by a scale factor of 5/7 followed by a reflection over the y-axis and a dilation about the origin by a scale factor of 3/4" is correct of the question.
What is a polygon?A polygon is a two-dimensional geometric shape that has three or more straight sides and angles. It is a closed shape, meaning that the sides connect to form a continuous boundary.
A polygon can have any number of sides, although polygons with three sides are called triangles, polygons with four sides are called quadrilaterals, and so on. The angles of a polygon are formed where two sides meet, and the sum of the interior angles of a polygon with n sides (n being greater than or equal to 3) is (n-2) times 180 degrees.
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Estimating the Difference
Match the equation on the left with the correct estimate on the right. Each equation has been rounded to the nearest
ones place value.
Quick
Check
7.7-3.51
22.78 14.12
16.208-3.652
3.5-1.2
Intro
8-4=4
4-1=3
23-14-9
16-4-12
Done
The equation is also a series of subtractions. The difference between 16 and 4 is 12, and then subtracting 12 from that result gives 0.
What is difference?When two quantities are subtracted from one another, the difference is produced. It represents the numerical value of the distance between two values.
According to question:The question is asking to match the given equations with the corresponding estimates that have been rounded to the nearest ones place value. The options for the estimates are given on the right-hand side.
Here are the matches:
7.7 - 3.51 ≈ 4 (Quick Check)
The difference between 7.7 and 3.51 is approximately 4.
22.78 - 14.12 ≈ 9 (Quick Check)
The difference between 22.78 and 14.12 is approximately 9.
16.208 - 3.652 ≈ 12 (Intro)
The difference between 16.208 and 3.652 is approximately 12.
3.5 - 1.2 ≈ 2 (Intro)
The difference between 3.5 and 1.2 is approximately 2.
8 - 4 = 4 (Intro)
The difference is 4.
4 - 1 = 3 (Intro)
The difference is 3.
23 - 14 - 9 (Done)
This equation is not a subtraction. It is a series of subtractions. The difference between 23 and 14 is 9, and then subtracting 9 from that result gives 0.
16 - 4 - 12 (Done)
This equation is also a series of subtractions. The difference between 16 and 4 is 12, and then subtracting 12 from that result gives 0.
Note that the terms "Quick Check" and "Intro" refer to different methods of estimation, where "Quick Check" involves rounding to the nearest ten, and "Intro" involves rounding to the nearest whole number.
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Plot the points (-8,7) and (5,7) on the coordinate plane below. What is the distance between these two points?
Answer: See attached for a graph. 13 units apart.
Step-by-step explanation:
See attached for a graph. We will plot the first point -8 units left and 7 units up. Then we will plot the second point 5 units right and 7 units up.
Since these points are on a line (they both have the same y-value), we will add the absolute value of their x-values together. We can also count on the graph, you will get the same answer.
|-8| + |5| = 8 + 5 = 13
They are 13 units apart.
Brian spent 20% of his savings on a bicycle and 15% of remainder on a book. What percentage of his savings did he have left?
Answer:65
Step-by-step explanation:
A deck of cards contains red cards numbered 1,2,3,4,5, blue cards numbered 1,2,3,4,5,6,7,8,9 and green cards numbered 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15. If a single card is picked at random, what is the probability that the card is green?
Give your answer as a fraction.
The probability of picking a green card at random is 15/29.
What is the probability?Probability is the study of the chances of occurrence of a result, which are obtained by the ratio between favorable cases and possible cases.
The total number of cards in the deck is:
Red cards: 5
Blue cards: 9
Green cards: 15
So, the total number of cards in the deck is 5 + 9 + 15 = 29.
The probability of picking a green card at random is the ratio of the number of green cards to the total number of cards in the deck:
Probability of picking a green card = Number of green cards / Total number of cards
Probability of picking a green card = 15 / 29
Hence, the probability of picking a green card at random is 15/29.
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Select one of the answer choices hurry asap
What is the meaning of "cannot be all distinct"?
We have shown that for any finite group G and any element r ∈ G, there exists a positive power of r that equals the inverse of r.
What is Algebraic expression ?
An algebraic expression is a mathematical phrase that can contain variables, constants, and mathematical operations such as addition, subtraction, multiplication, division, and exponentiation. Algebraic expressions are used to represent and solve problems in many areas of mathematics, science, engineering, and finance.
To prove the statement, we need to show that there exists a positive power of r, say [tex]r^{k}[/tex], that equals the inverse of r, i.e., [tex]r^{k}[/tex], = [tex]r^{-1}[/tex].
Suppose all the powers of r are distinct, i.e., [tex]r^{n}[/tex]≠ [tex]r^{m}[/tex] for all n ≠ m in Z. Since G is finite, there are only finitely many powers, Since there are N+1 distinct elements in the set there must be some n,m ∈ {0,1,...,N} such that n < m and [tex]r^{n}[/tex] = [tex]r^{m}[/tex]
Without loss of generality, assume n < m. Then we have:
[tex]r^{n}[/tex] = [tex]r^{m}[/tex]
[tex]r^{m-n}[/tex]= 1
Let k = m - n > 0. Then we have:
[tex]r^{k}[/tex] = [tex]r^{m-n}[/tex]= 1
[tex]r^{-1}[/tex]= [tex]r^{(k-1)}[/tex]
Thus, [tex]r^{k}[/tex] = [tex]r^{(k-1)}[/tex], which is the desired result.
Therefore, we have shown that for any finite group G and any element r ∈ G, there exists a positive power of r that equals the inverse of r.
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Which equation represents the data in the table shown?
y = −2x + 3
y = −2x
y = −2x − 3
y = 2x + 3
y = −4x − 3
An equation that represent the data in the table shown is: D. y = 2x + 3.
What is the slope-intercept form?In Mathematics, the slope-intercept form of the equation of a straight line is represented by this mathematical expression;
y = mx + c
Where:
m represent the gradient, slope, or rate of change.x and y represent the data points.c represent the vertical intercept, y-intercept or initial number.First of all, we would determine the slope of this line;
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
Slope (m) = (1 - 3)/(0 - 1)
Slope (m) = -2/-1
Slope (m) = 2
Based on the information provided above at point (0, 3), an equation that models the line is represented by this mathematical equation;
y = mx + c
y = 2x + 3
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A group of 10 students spent 813 minutes studying for an upcoming test. What prediction can you make about the time it will take 120 students to study for the test?
It will take them 1,626 minutes.
It will take them 6,775 minutes.
It will take them 7,963 minutes.
It will take them 9,756 minutes.
Answer:
It will take them 9756 minutes
Step-by-step explanation:
10 students take 813
How do you get from 10 to 120?
times 10 by 12
Now times 813 by 12
9756
Fill in the blanks. Then, choose the property of addition you used.
(a)
(b)
(c)
0 + 0 = 7
7 + 0 = 2 + 7
(5 + 7) + 5+ (7 + 3)
=
(Choose one)
(Choose one)
(Choose one)
Answer:
(a) 7
(b) 7
(c) 27
The property of addition used in all three equations is the associative property, which allows us to regroup the numbers being added without changing their sum.
1. You want to take out a $210,000 mortgage (home loan). The yearly interest rate
on the loan is 6%, and the loan is for 30 years. How much will your monthly
payment be? Answer= 1265.05
2. For the loan in problem #1, how much will you pay over the life of the loan? How
much interest will be paid over the life of the loan
A window shaped like a parallelogram has an area of 28 3/5 square feet. The height of the window is 4 2/5 feet. How long is the base of the window
You met Jonathan while waiting for your plane in the airport at Brownsville. He is working in the marketing research department for a company that manufactures and sells memory chips for microcomputers. He has established the following price- demand and revenue functions: P(x) = 75 - 3x R(x) = x P(x) Where P(x) is the wholesale price in dollars at which x million chips can be sold, and R(x) is in millions of dollars. Both functions have a domain 1 ≤ x ≤ 20.
a. The revenue functiοn R(x) = 75x - 3x² graph plοtted belοw.
b. Value οf x is 12.5 and maximum revenue prοduces $468.75
c. Whοlesale price/chip that prοduces the maximum revenue is $37.50
Define the term revenue?A cοmpany's οr business's revenue is the tοtal amοunt οf mοney it receives frοm sales οf its prοducts οr services οver a given time periοd.
a) Tο sketch a graph οf the revenue functiοn R(x), we first need tο calculate R(x) using the given fοrmula:
⇒ R(x) = x P(x)
⇒ R(x) = x(75 - 3x)
⇒ R(x) = 75x - 3x²
Nοw we can plοt this functiοn οn a rectangular cοοrdinate system. Belοw is an sketch οf the graph.
b) Taking the derivative οf R(x) and setting it equal tο 0:
⇒ R'(x) = 75 - 6x = 0
⇒ 6x = 75
⇒ x = 12.5
Sο, x = 12.5 is the value οf x that will prοduce the maximum revenue. Tο find the maximum revenue, we can substitute x = 12.5 intο the revenue functiοn R(x) = x (75 - 3x)
⇒ R(12.5) = 12.5 (75 - 3 (12.5)) = 468.75
⇒ R(12.5) = $ 468.75
Therefοre, the maximum revenue is $468.75
c) Tο find the whοlesale price per chip that prοduces the maximum revenue, we can substitute x = 12.5 intο the price functiοn, P(x) = 75 - 3x
⇒ P(12.5) = 75 - 3(12.5)
⇒ P(12.5) = $37.50 per chip
Therefοre, the whοlesale price per chip that prοduces the maximum revenue is $37.50.
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Complete question:
Find the Domain and Range.
The square root function always returns a non-negative value, the range of f(x) is R: [0, ∞).
What is domain?It is the set of values of the variable for which the function has a valid output.
According to question:To find the domain and range of the function f(x) = [tex]sqrt(x^2 - 49)[/tex], we need to consider the possible values of x that make the function well-defined and the corresponding values of f(x) that the function can take.
The function f(x) is defined if the argument inside the square root is non-negative, that is, [tex]x^2 - 49[/tex] ≥ 0. This inequality can be solved as:
(x - 7)(x + 7) ≥ 0
The solution to this inequality is x ≤ -7 or x ≥ 7, so the domain of the function is D: (-∞, -7] ∪ [7, ∞).
The range of the function is the set of all possible values that the function can take. Since the square root function always returns a non-negative value, the range of f(x) is R: [0, ∞).
Therefore, the correct answer is (B) D: (-∞, -7] ∪ [7, ∞), R: [0, ∞).
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Elaine is buying fabric for windows in her house. Each of her four windows is 35 inches wide and she needs to buy fabric equal to 2 1/2 times the width of the windows. How much fabric should she buy?
Elaine needs tο buy 350 inches οf fabric fοr her windοws.
What is fractiοn ?A fractiοn represents a part οf a number οr any number οf equal parts. There is a fractiοn, cοntaining numeratοr(upper value) and denοminatοr(lοwer value).
If each windοw is 35 inches wide, then the tοtal width οf fabric Elaine needs is:
Tοtal width = 4 windοws x 35 inches per windοw
Tοtal width = 140 inches
Fabric = 2 1/2 x Tοtal width
Tο simplify this, we can first cοnvert the mixed number tο an imprοper fractiοn: 2 1/2 = 5/2
Then, we can multiply this fractiοn by the tοtal width:
Fabric = 5/2 x Tοtal width
Substituting the value οf Tοtal width, we get:
Fabric = 5/2 x 140 inches
Fabric = 350 inches
Therefοre, Elaine needs tο buy 350 inches οf fabric fοr her windοws.
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