Answer:
in break-even point
C=R
20n+134000=160n
134000= 160n-20n
140n=134000
n=134000/140
n=957.14
n=957 ( nearest whole number)
C= 20(957.14) + 134000
= 153142.8
= 153143 (nearest whole number)
R= 160(957.14)
=153142.4
= 153142 (nearest whole number)
Find the area of the following composite figure.
Is this correct?
Step-by-step explanation:
the sum of the area of the inner rectangle and the area of the 2 outer half-circles (that together are the area of one full circle).
the radius of the circles is 10 ft.
so, the diameter (= the width of the inner rectangle) = 2×10 = 20 ft.
so, the area of the inner rectangle is
30×20 = 600 ft²
the area of the combined full circle is
pi×r² = pi×10² = 100pi = 314.1592654... ft²
together that is
914.1592654... ft²
Please help
Fill in each answer box so that the resulting statement is true
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twenty-four workers were surveyed and asked how long it takes them to travel to work each day. the data below are given in minutes. 20 35 42 52 65 20 60 49 24 37 23 24 22 20 41 25 28 27 50 47 58 30 32 48 which of the following shows the data in a stem-and-leaf plot?
Use the data to create a stemplot.
Twenty-four workers were surveyed about how long it takes them to travel to work each day. The data below are given in minutes.
20 35 42 52 65 20 60 49 24 37 23 24
22 20 41 25 28 27 50 47 58 30 32 48
The data in a stem-and-leaf plot:
3/0257
2/0002344578
4/12789
5/028
6/05
Stemplots (Stem-and-Leaf Plots)Another presentation that is similar to a histogram is a stemplot. In statistics, a stemplot is a tool for presenting quantitative data in a graphical format, similar to a histogram, namely to assist in visualizing the shape of the data distribution which is often used in exploratory analysis. Stemplots were introduced by Arthur Bowley in the early 1900's. However, its general use only began in 1980 after John Tukey's published Exploratory Data Analysis in 1977.
Stem-and-leaf plots provide more information about true values than histograms. As in a histogram, the length of each bar corresponds to the number of events that fall into a given interval. On Histograms. we can only see the frequency value of the data but we don't know what the actual number value is. In contrast to the histogram, in SLP besides we can know the frequency value, we can also know what the actual data value is. This is done by dividing the observed values into two components, stem and leaf.
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6. A parabola has focus (-1, 6) and directrix y = 4. Determine whether each point on
the list is on this parabola. Explain your reasoning.
a. (-1,5)
b. (1,7)
c. (3,9)
a. (-1,5) is on the parabola
b. (1,7) is NOT on the parabola
c. (3,9) is NOT on the parabola
How to find if they are on the parabolaa. (-1,5)
The distance from the point (-1,5) to the focus (-1,6) is sqrt((-1-(-1))^2 + (5-6)^2) = sqrt(0+1) = 1
The distance from the point (-1,5) to the directrix y=4 is the absolute value of the y-coordinate of the point - the y-coordinate of the directrix = abs(5-4) = 1
Since the distances are equal, the point (-1,5) is on the parabola.
b. (1,7)
The distance from the point (1,7) to the focus (-1,6) is sqrt((1-(-1))^2 + (7-6)^2) = sqrt(2^2 + 1^2) = sqrt(5)
The distance from the point (1,7) to the directrix y=4 is the absolute value of the y-coordinate of the point - the y-coordinate of the directrix = abs(7-4) = 3
Since the distances are not equal, the point (1,7) is not on the parabola.
c. (3,9)
The distance from the point (3,9) to the focus (-1,6) is sqrt((3-(-1))^2 + (9-6)^2) = sqrt(4^2 + 3^2) = sqrt(16+9) = sqrt(25)
The distance from the point (3,9) to the directrix y=4 is the absolute value of the y-coordinate of the point - the y-coordinate of the directrix = abs(9-4) = 5
Since the distances are not equal, the point (3,9) is not on the parabola.
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Find the equation for the plane through the points Po(5,5,2), Qo(-4,0,-2), and Ro(-4,-1,1).
Using a coefficient of - 19 for x, the equation of the plane is
Ax+by is c is the equation for a line in two dimensions, the equation for a line in three dimensions.
What is the equation of plane formula?The equation of a plane in R has the generic form an x + b y + c z + d = 0, where a, b, and c are the elements of the normal vector n = (a, b, c) that is perpendicular to the plane or any vector parallel to the plane.A line and a point that is not on the line can only be crossed by one plane.Ax+by=c is the equation for a line in two dimensions. It is logical to assume that ax+by+cz=d is the equation for a line in three dimensions. However, this assumption is incorrect since it turns out that this is really the equation for a plane. In contrast to a line, a plane lacks an evident "direction."(5,5,2), Qo(-4,0,-2), and Ro(-4,-1,1).5x + 5y =2-4x + y = -2-4x -y = 1To learn more about equation of the plane refer to:
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Suppose we fit a least-squares regression line to a set of data. What is true if a plot of the residuals shows a curved pattern?
answer choices
The correlation must be 0.
The correlation must be positive.
A straight line is not a good model for the data.
The regression line might or might not be a good model for the data, depending on the extent of the curve.
If a plot of the residuals shows a curved pattern, it indicates that a straight line is not a good model for the data. This does not necessarily mean that the correlation between the two variables must be 0 or positive, as the regression line might still be a good model for the data depending on the extent of the curve.
When a least-squares regression line is fit to a set of data, it is used to determine the linear relationship between two variables. If a plot of the residuals (the difference between the observed values and the predicted values from the regression line) shows a curved pattern, it indicates that a straight line is not a good model for the data. This could mean that there is a nonlinear relationship between the two variables or that the data contains outliers that are not accounted for by the regression line. However, it does not necessarily mean that the correlation between the two variables must be 0 or positive, as the regression line might still be a good model for the data depending on the extent of the curve. To determine if the regression line is an accurate model for the data, it is important to visually inspect the plot of the residuals and assess whether the pattern is random or systematic. If the pattern is random, it indicates that the regression line is a good model for the data. If the pattern is systematic, it indicates that the regression line is not a good model for the data and alternative models should be considered.
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1. A 1992 poll conducted by the University of Montana classified respondents by sex and political
party, as shown in the picture.
a) What is the probability of selecting a Democrat?
b) What is the probability of selecting a respondent that is Independent and Female?
c) What is the probability of selecting a respondent that is Republican given that is Male?
d) What is the probability of selecting a respondent that is Republican or Female?
e) Are the events being a Republican independent of being a Male? Justify and explain
A: The probability of selecting a Democrat is 84/212 = 0.3968 or 39.68%.
B: The probability of selecting an Independent and Female respondent is 16/212 = 0.075 or 7.5%.
C: The probability of selecting a Republican given that the respondent is Male is 45/69 = 0.6522 or 65.22%.
D: The probability of selecting a Republican or Female respondent is 126/212 = 0.5962 or 59.62%.
E: The events being a Republican independent of being a Male, P(Republican/Male) = P(Republican) which means these events are independent.
What is the probability?
Probability is a mathematical concept that quantifies the likelihood of an event occurring. It is a number between 0 and 1, where 0 represents an impossible event and 1 represents a certain event.
a) To find the probability of selecting a Democrat, we need to add up the number of Democratic respondents and divide by the total number of respondents. In this case, the number of Democratic respondents is 36 + 48 = 84. The total number of respondents is 84 + 45 + 24 + 33 + 16 = 212. So the probability of selecting a Democrat is 84/212 = 0.3968 or 39.68%.
b) To find the probability of selecting an Independent and Female respondent, we need to find the number of Independent and Female respondents, and divide by the total number of respondents. In this case, the number of Independent and Female respondents is 16. The total number of respondents is 212, so the probability of selecting an Independent and Female respondent is 16/212 = 0.075 or 7.5%.
c) To find the probability of selecting a Republican given that the respondent is Male, we need to use conditional probability formula. P(Republican/Male) = P(Republican and Male) / P(Male)
In this case, the number of Republican and Male respondents is 45. The number of Male respondents is 45+24 = 69
So the probability of selecting a Republican given that the respondent is Male is 45/69 = 0.6522 or 65.22%.
d) To find the probability of selecting a respondent that is Republican or Female, we need to find the number of Republican or Female respondents and divide by the total number of respondents. In this case, the number of Republican or Female respondents is 45 + 33 + 48 = 126. The total number of respondents is 212, so the probability of selecting a Republican or Female respondent is 126/212 = 0.5962 or 59.62%.
e) To answer whether the events being a Republican independent of being a Male or not, we need to check the independence of the events. Events A and B are independent if and only if P(A/B) = P(A) = P(B)
In this case, P(Republican/Male) = 0.6522 and P(Republican) = (45+33)/212 = 0.4906
So the events being a Republican independent of being a Male, P(Republican/Male) = P(Republican) which means these events are independent.
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Graph the line
y=-1/3x-6
Answer:
the slope is -1/3 and the coordinates are (0,-6) and (3,-7). Below is a picture of the equation graphed.
Step-by-step explanation:
What is 4 ÷ 1⁄5?
- Answers are appericated.
Answer: 20
Step-by-step explanation:
Answer:
[tex] \sf \: 4 \div \frac{1}{5} = 20[/tex]
Step-by-step explanation:
Given problem,
[tex] \sf \rightarrow \: 4 \div \frac{1}{5} [/tex]
Let's solve the problem,
[tex] \sf \rightarrow \: 4 \div \frac{1}{5} [/tex]
[tex] \sf \rightarrow \: 4 \times \frac{5}{1} [/tex]
[tex] \sf \rightarrow \: 4 \times 5[/tex]
[tex] \sf \rightarrow \: 20[/tex]
Hence, the answer is 20.
help pls i need the answer and fast !!!
Answer: The slope of the line is 2/3.
The line is not solid, it is dashed.
The area below the line is shaded.
A solution to the inequality is (2,3).
The x-intercept of the boundary line is (-3/2,0)
All the statements except the first one are true about the graph of y< 2/3 x +1.
Step-by-step explanation:
Answer and Explain PLease
A figure has rotational symmetry when it can be rotated by an angle measure which is greater than 0º and less than 360º and the rotated image is equals to the original figure, that is, the image is equals to the pre-image.
The square has four sides, hence:
360/4 = 90º.
The other figure has three sides, which are similar, hence:
360/3 = 120º.
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In a cash drawer, there is $125 in $5 and $10 bills. The number of $10 bills is twice the number of $5 bills. How many of each type of bill is in the drawer?
Answer:
Step-by-step explanation:
You can use the equations:
x = 2y
where x is the number of $10 bills and y the number of $5 bills and:
10x+5y = 125
Solving gives x=10 and y = 5, or in other words there are 10 $10 bills and 5 $5 bills
The expression 16n-24 factored using GCF
The G.C.F. of the expression 16n - 24 is evaluated to be 8(2n - 3).
What is an expression?
Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.
The given expression is - 16n - 24.
The greatest common factor, which is the product of two or more numbers, is the largest number (GCF). A natural number is created by dividing them by the biggest number (factor).
First of all find the G.C.F of 16n and 24 separately.
It can be written that -
16n = 2 × 2 × 2 × 2 × n
24 = 2 × 2 × 2 × 3
The common prime factor between the two is 2 × 2 × 2 = 8.
So, the GCF of 16n and 24 is 8.
Now use the GCF to factor the expression -
= 16n - 24
= 8(2n) - 8(3)
Using the distributive property -
= 8(2n) - 8(3)
= 8(2n - 3)
Therefore, the GCF value is 8(2n - 3).
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Having alot of trouble figuring this out! 100pts to anyone that can help!
What is the ratio of 1.5-inch screws to 2.5-inch screws, written in three different ways? Do not reduce.
The ratio of two screws written in three different forms are,
2.5 : 1.5, 5 : 3 and 1.5/2.5.
What are ratio and proportion?A ratio is a comparison between two similar quantities in simplest form.
Proportions are of two types one is the direct proportion in which if one quantity is increased by a constant k the other quantity will also be increased by the same constant k and vice versa.
In the case of inverse proportion if one quantity is increased by a constant k the quantity will decrease by the same constant k and vice versa.
Given, Two screws are in the ratio of 1.5 inches and 2.5 inches.
It can be written as 2.5 : 1.5
It can also be written as 2.5×10 : 1.5×10 = 25 : 15 = 5 : 3.
It can also be written as a fraction as, 1.5/2.5.
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using the basic definition show that {3n-2/n}n=1 converges
The sequence (3n-2/n)n=1 converges to 1.
How to determine if the series convergesTo show that (3n-2/n)n=1 converges, we need to find the limit as n approaches infinity.
Using algebraic manipulation, we have the following steps
lim (3n-2/n)n = lim (3-2/n)^n
lim (3n-2/n)n = (3-2/∞)^∞
lim (3n-2/n)n = 1^∞
lim (3n-2/n)n = 1
The basic definition of convergence states that a sequence converges if the limit of the sequence as n approaches infinity is equal to a finite number
Since the limit of (3n-2/n)n as n approaches infinity is 1, we can conclude that the sequence converges to 1.
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a picture is enlarged by keeping its width the same and increasing its length. the scatter plot shows the perimeter of the picture (y) for different lengths (x):plot the ordered pairs 20, 60 and 30, 80 and 40, 100 and 50, 120 and 60, 140which function best represents the data in the scatter plot?
The function best represents the data in the scatter plot is y = 2x + 20.
The function of the straight line has the general formula: y = mx + c
where m is the slope of the line, and c is the y-intercept
So first, we will need to find the slope (m):
The slope can be calculated with the points (x₁, y₁) and (x₂, y₂) as follows:
m = (y₂ - y₁)/(x₂ - x₁)
= 120 - 60/50 - 20
= 60/30
= 2/1
So, now we have the slope of our equation y = 2x + b but we still need to find b (or where the y intersects.)
Now, consider the ordered pair (20, 60)
y = 2x + b
60 = 2 × 20 + b
b = 60 - 40
b = 20
Now, put the value of b in y = 2x + b, and we get
y = 2x + 20
Also, b can not be -20 because this is a positive y-intercept, and we know it has a slope of 2.
Therefore the function is y = 2x + 20
--The given question is incomplete; the complete question is
"A picture is enlarged by keeping its width the same and increasing its length. The scatter plot below shows the perimeter of the picture (y) for different lengths (x):
Plot the ordered pairs 20, 60 and 30, 80 and 40, 100 and 50, 120 and 60, 140
Which function best represents the data in the scatter plot?
y = 2x − 20
y = 2x + 20
y = x − 20
y = x + 20"--
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Need help with #4 please :)
Answer:
Step-by-step explanation:
the answer is 69
Answer:yes
Step-by-step explanation:
The Angle-Side-Angle Postulate (ASA) states that if two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent.
Here we see two sides being congruent and one angle, this means that the other angles are also congruent, as only one triangle can be formed with two set sides and an angle. therefore we know both triangles are congruent
Question 8
A scientist determines a plot of forest has a stable population of about 100 deer. Deer live in the interior of ecosystems. Then, a highway is built, splitting the forest into two plots of equal size.
After a couple of years, the scientist checks the number of deer in the two plots and finds the total population to be 60 deer.
Why did the carrying capacity of the habitat drop when the forest was split into two plots?
Select all that apply.
Responses
The two plots of forest have more edges than a single plot, causing a decrease in interior species. The two plots of forest have more edges than a single plot, causing a decrease in interior species.
The highway changed the climate of the region, making it less suitable for deer.The highway changed the climate of the region, making it less suitable for deer.
The two plots of forest provided more interior habitat for species other than deer. The two plots of forest provided more interior habitat for species other than deer.
The highway affected the growth of many plant species, which serve as food for the deer.
Question 9
A chicken-sized, flightless bird lives on an island in the middle of an ocean. The bird has some natural predators, which it avoids.
When people arrive at this island, they bring cats with them. Cats also hunt the bird.
What is the impact in the short term of bringing cats to the island?
Responses
The number of birds will remain the same.The number of birds will remain the same.
It is not possible to know whether there will be fewer or more birds.It is not possible to know whether there will be fewer or more birds.
There will be fewer birds.There will be fewer birds.
There will be more birds.
a) The highway affected the growth of many plant species, which serve as food for the deer. Option D
b) There will be fewer population of the birds. Option C
What is the carrying capacity?The carrying capacity of an ecosystem is the maximum number of individuals of a particular species that can be supported by the available resources in that ecosystem.
It is the point at which the population growth rate becomes zero, as the resources needed to sustain the population (such as food, water, and space) become limited. Carrying capacity can change over time due to factors such as climate change, pollution, and human activity.
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you can assess normality of data using what?
You can assess normality of data using D. Pearson's Measure of Normality
What is Pearson's Measure of Normality ?Pearson's Measure of Normality, also known as Pearson's Test for Normality, is a statistical test that is used to assess whether a set of data is normally distributed.
It is based on the skewness and kurtosis of the data, and it provides a p-value which indicates the probability that the data is from a normal distribution. Pearson's test is considered as one of the most common statistical test used to check normality of data.
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The full question is:
You can assess normality of data using A. Pearson's Index of Skewness B. Pearson's Test C. Pearson's p-value D. Pearson's Measure of Normality
14. A brand-new school district needs to generate ID numbers for its student body. The district anticipates a total
enrollment of 75,000 students within the next ten years. Will a five-digit ID number using the symbols 0, 1,…, 9
be enough? Explain your reasoning using logarithms
The different combinations of the five-digit number formed are enough to create ID numbers.
What is meant by combinations?
Combinations are ways to choose elements from a collection in mathematics where the order of the selection is irrelevant.
We first find the total number of 5-digit enrollment IDs that can be created using all possible combinations of numbers possible.
Since each digit of the five-digit number can be from 0-9, there are ten possible values for each digit.
So the total number of ways a five-digit number can be formed
= 10*10*10*10*10 = 100,000
For the given question, it is mentioned that only 75,000 students are expected to be enrolled in the next ten years,
Since 100,000 is greater than 75,000 the five-digit ID number will be enough.
But if the school is to last longer than ten years, it is safe to use a six or seven-digit ID number.
Therefore a five-digit Id number using symbols from 0-9 will be enough.
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Which is greater -6, 6, or -2
compare the original function with the 1st through 4th order approximations for different values of x,
First order approximation = (sin(x+dx)/(x+dx)^3 - sin(x)/x^3)/dx and ((sin(x-(2*dx))/(x-(2*dx))3) is a formula for calculating the fourth-order
Function output for the first order approximation is first order approx (x,dx)
(x3*(cos(x)) analytical derivative =
-sin(x)*3*x^2)/x^6;
First order approximation: % forward differencing = (f(x+dx) - f(x))/dx%
first-order approximation = (sin(x)/x3 - sin(x)/x+dx)/(x+dx)3)/dx;
output is equal to Abs(FirstOrderApproximation - AnalyticalDerivative);
end
Function output for the fourth-order approximation is fourth-order approx (x,dx)
(x3*(cos(x)) analytical derivative =
-sin(x)*3*x^2)/x^6;
((sin(x-(2*dx))/(x-(2*dx))3) is a formula for calculating the fourth-order approximation. 8*(sin(x-dx))/(x-dx) + 8*(sin(x+dx))/(x+dx) - ((sin(x+(2*dx))/(x+(2*dx))3))/(12*dx);
output for the error term is abs(approximation of first order - analytical derivative);
end
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6/10 Darlene runs kilometer in the morning and 1 2/5 kilometers in
About how many kilometers does Darlene run?
the afternoon.
The number of kilometers that Darlene runs is given as follows:
2.4 kilometers.
How to obtain the distance that Darlene runs?The distance that Darlene runs is obtained applying the proportions in the context of the problem.
The proportion is applied to convert the mixed number to decimal, adding the integer part to the division of the numerator by the denominator.
The distances are given as follows:
Morning: 1 km.Afternoon: 1 + 2/5 = 1 + 0.4 = 1.4 km.Hence the total distance is of:
1 + 1.4 = 2.4 km.
Missing InformationShe ran 1 km in the morning.
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4y=12x=3 and let y+3x+1 a solution
The system of linear equations 4 · y - 12 · x = 3 and y + 3 · x = 1 has the following solution: (x, y) = (1 / 24, 7 / 8)
How to solve a system of linear equations
In this question we find the case of a system of two linear equations with two variables, this case may have an unique solution. This system can be solved by algebraic properties.
First, write the system of linear equations:
4 · y - 12 · x = 3
y + 3 · x = 1
Second, clear y in the second equation:
y = 1 - 3 · x
Third, substitute in the first equation:
4 · (1 - 3 · x) - 12 · x = 3
Fourth, expand the expression and clear variable x:
4 - 12 · x - 12 · x = 3
4 - 24 · x = 3
24 · x = 4 - 3
24 · x = 1
x = 1 / 24
Fifth, determine the value of variable y:
y = 1 - 3 · (1 / 24)
y = 1 - 1 / 8
y = 7 / 8
The solution to the system of linear equations 4 · y - 12 · x = 3 and y + 3 · x = 1 is (x, y) = (1 / 24, 7 / 8).
RemarkThe statement reports several typing mistakes. The system of linear equations is shown below:
4 · y - 12 · x = 3
y + 3 · x = 1
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question the height of 3-year-old boys is approximately normally distributed. duncan and shane are 3-year-old boys.duncan is 32.0 inches tall and is at the 32nd percentile of the distribution. shane is 34.0 inches tall and is at the 62nd percentile of the distribution. which of the following is closest to the mean of the height distribution?
Duncan's height is closest to the mean.
Duncan (32nd percentile) has a z-score of z = 0.4677 and Shane (62nd percentile) has a z-score of z = 0.3055 when using "Table A" or "normalcy" on a TI calculator. Now that we have the z-score formula, we can create
−0.4677 = (32 − μ)/σ
and
Duncan and Shane are 3-year-old boys. Duncan is 32.0 inches tall and is at the 32nd percentile of the distribution. shane is 34.0 inches tall and is at the 62nd percentile of the distribution.
0.3055 = (34 − μ)/σ
Since the boys' heights fall under the same distribution, it should be noted that and will have the same values in each equation. Consequently, this is a set of linear equations.
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help me please (asap)!!!!
Answer:
no more Fortnight gift cards
Step-by-step explanation:
It would take Jack $4$ hours to mow the lawn if he works alone. Fortunately, after he mows for $2$ hours, Jill joins him. They finish mowing $90$ minutes later. How many minutes would it have taken for Jill to mow the entire lawn alone?
Answer: 720
Step-by-step explanation:
according to the social class model developed by gilbert, which is based on weber's analysis of the class structure, the upper class in the united states includes about of the population. group of answer choices 3 percent 1 percent 8 percent 12 percent
According to the social class model developed by Gilbert and Kahl, and based on the theory of Weber, the upper (capitalist) class of the United States includes about b) 1 percent of the population.
In the United States, the upper class, or capitalist class, is estimated to comprise about 1 percent of the population.
This is according to the social class model developed by Gilbert and Kahl, which is based on the theory of Weber.
This model suggests that the upper class is made up of those who own the majority of the nation's wealth and power, and are thus able to influence governmental decisions.
While the upper class may be small in size, it is highly influential and its members often have the resources to enact large-scale change.
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If 4 -letter "words" are formed using the letters A, B, C, D, E, F, G, how many such words are possible for each of the following conditions: (a) No condition is imposed. Your answer is : (b) No letter can be repeated in a word. Your answer is : (c) Each word must begin with the letter A and letters can be repeated. Your answer is : (d) The letter C must be at the end and letters can be repeated. Your answer is : (e) The second letter must be a vowel and letters can be repeated. Your answer is :
In this case, there are 8 letters, so the total number of 4-letter words possible is 8^4 = 4096.
(b) In this case, each letter can be used only once, so we must choose 4 different letters out of 8 letters. This can be done using the combination formula C(8,4) = 70.
(c) Since each word must begin with the letter A, the remaining 3 letters must be chosen from the remaining 7 letters. This can be done using the combination formula C(7,3) = 35.
(d) The letter C must be at the end, so the first 3 letters must be chosen from the remaining 7 letters. This can be done using the combination formula C(7,3) = 35.
(e) The second letter must be a vowel, so the first letter can be chosen out of 4 letters (A, E, I, O). The remaining 3 letters can be chosen out of 7 letters. This can be done using the combination formula C(4,1) x C(7,3) = 140.
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