The given information states that the car sales for the new model are predicted to start at 4,200 cars in the first month and decrease by 50 cars per month after the first year.
To find the first five terms of the sequence, we can start with the initial value of 4,200 cars and subtract 50 cars for each subsequent term. The sequence would be as follows:
First term (a1): 4,200 cars
Second term (a2): 4,200 - 50 = 4,150 cars
Third term (a3): 4,150 - 50 = 4,100 cars
Fourth term (a4): 4,100 - 50 = 4,050 cars
Fifth term (a5): 4,050 - 50 = 4,000 cars
To calculate the total predicted number of cars sold for the first year, we need to sum up the first twelve terms of the sequence since there are twelve months in a year. However, the information provided only includes the prediction for the first five terms. Therefore, we cannot determine the total predicted number of cars sold for the first year based on the given data.
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According to government data, 22% of American children under the age of 6 live in households with incomes less than the official poverty level. A study of learning in early childhood chooses an SRS of 300 children from one state and finds that .
a. Find the probability that at least 29% of the sample are from poverty-level households, assuming that 22% of all children under the age of 6 in this state live in poverty-level households.
b. Based on your answer to part (a), is there convincing evidence that the percentage of children under the age of 6 living in households with incomes less than the official poverty level in this state is greater than the national value of 22%? Explain your reasoning.
a. The resultant probability is 0.17%
b. The resultant statement greater than the national value of 22% is true.
The probability that at least 29% of the sample are from poverty-level households is 0.17% and we do not have enough evidence to reject the null hypothesis that the population proportion is equal to 22%.
According to government data, 22% of American children under the age of 6 live in households with incomes less than the official poverty level. A study of learning in early childhood chooses an SRS of 300 children from one state and finds that at least 29% of the sample are from poverty-level households.
To answer part (a) of the question, we can use the normal approximation to the binomial distribution. The mean of the distribution is np = 300 * 0.22 = 66 and the standard deviation is sqrt(np(1-p)) = sqrt(66 * 0.78) = 7.09. We can use the normalcdf function to find the probability that at least 29% of the sample are from poverty-level households:
normalcdf(87.5, 300, 66, 7.09) = 0.0017
So the probability is 0.17%.
For part (b) of the question, we need to determine if there is convincing evidence that the percentage of children under the age of 6 living in households with incomes less than the official poverty level in this state is greater than the national value of 22%.
Since the probability that at least 29% of the sample are from poverty-level households is 0.17%, which is very small, we can conclude that there is not convincing evidence that the percentage of children under the age of 6 living in households with incomes less than the official poverty level in this state is greater than the national value of 22%.
The small probability suggests that the observed sample result is unlikely to occur by chance if the true population proportion is 22%, so we do not have enough evidence to reject the null hypothesis that the population proportion is equal to 22%.
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Write an equation of the graph shown in terms of cosine:
Answer:
Step-by-step explanation:
A squiggly line can refer to a variety of different shapes or patterns. To create an equation using cosine that resembles a squiggly line, you can use a combination of sine and cosine functions with different frequencies and amplitudes. Here's an example equation that produces a squiggly pattern:
y = A * cos(B * x) + C * sin(D * x)
In this equation, A, B, C, and D are constants that you can adjust to modify the shape and characteristics of the squiggly line. By experimenting with different values for these constants, you can create various squiggly patterns. Keep in mind that the specific equation may vary depending on the exact shape and features you have in mind for the squiggly line.
Find the volume of a cone
Answer:
96π or 301.59 in³
Step-by-step explanation:
V(cone) = 1/3πr²h
= 1/3·π·6²·8
= 96π or 301.59
Answer:
301.58
Step-by-step explanation:
I need help with composite figuers with a shade region
The area of a Composite figure with a shaded region requires breaking down the figure into its simpler shapes and calculating the area of each shape.
Composite figures are made up of two or more simple shapes, such as squares, triangles, rectangles, or circles, that are combined together. When a composite figure has a shaded region, it means that a portion of the figure is colored or filled in.
To find the area of a composite figure with a shaded region, we need to break it down into its simpler shapes. Then, we can calculate the area of each simple shape and add them together to get the total area of the composite figure.
For example, consider a composite figure made up of a square and a semicircle, where the shaded region is the part of the square that is outside of the semicircle. To find the area of the shaded region, we can follow these steps:
1. Find the area of the square: A = s^2, where s is the length of a side of the square.
2. Find the area of the semicircle: A = (πr^2)/2, where r is the radius of the semicircle.
3. Subtract the area of the semicircle from the area of the square to get the area of the shaded region: A_shaded = A_square - A_semicircle.
To visualize this process, we can draw the composite figure and shade in the desired region. Then, we can label the dimensions of each simple shape and use them to calculate the areas.
It is important to remember that when finding the area of a shaded region in a composite figure, we need to make sure that we are subtracting the area of the shaded region only once. This can be tricky if the shapes overlap, so it is important to be careful and double-check our work.the area of a composite figure with a shaded region requires breaking down the figure into its simpler shapes and calculating the area of each shape.
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lA composite figure is a figure that is made up of two or more simpler figures. The area of the shaded region is 99 square units.
How to explain the composite figureIn order to find the area of a shaded region, you can use the following steps:
Identify the simpler figures that make up the composite figure.
Find the area of each simpler figure.
This composite figure is made up of a rectangle and a triangle. The area of the rectangle is
= 10 * 12 =120 square units,
The area of the triangle is
= 1/2 * 6 * 7
= 21 square units.
The area of the shaded region is therefore
= 120 - 21
= 99 square units.
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Abel ran more than 8 miles this week. which set of steps shows how to write an inequality that represents the number of miles abel ran? identify the variable as the number of miles. identify the inequality symbol as less than. identify the constant as 8 miles. write the inequality as m less-than 8. identify the variable as the number of miles. identify the inequality symbol as less than. identify the constant as negative 8 miles. write the inequality as m less-than negative 8. identify the variable as the number of miles. identify the inequality symbol as greater than. identify the constant as negative 8 miles. write the inequality as m greater-than negative 8. identify the variable as the number of miles, m. identify the inequality symbol as greater than. identify the constant as 8 miles. write the inequality as m greater-than 8.
The inequality that represents the scenario is x > 8
How to determine the inequality?From the question, we understand that:
Abel ran more than 8 miles this week
Let the number of miles be x.
The text "more than" means that we make use of the greater than inequality symbol
So, the inequality that determines the steps is:
x > 8
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Answer:
m
Step-by-step explanation:
find 3+root 2/3-root 2=a+b root2
Answer:
a = \(\frac{11}{7}\) ; b = \(\frac{6}{7}\)
Step-by-step explanation:
\(\frac{3 + \sqrt{2}}{3 - \sqrt{2} } = a + b\sqrt{2} \\\\\)
Rationalising \(\frac{3 + \sqrt{2}}{3 - \sqrt{2} }\) gives :-
\(\frac{3 + \sqrt{2}}{3 - \sqrt{2} } = \frac{(3 + \sqrt{2})(3 + \sqrt{2})}{(3 - \sqrt{2})(3 + \sqrt{2}) } = \frac{(3 + \sqrt{2})^2}{3^2 - (\sqrt{2})^2 } = \frac{11 +6\sqrt{2} }{7}\)
Comparing \(\frac{11 + 6\sqrt{2} }{7}\) with \(a + b\sqrt{2}\) gives
a = \(\frac{11}{7}\) & b = \(\frac{6}{7}\)
Answer:
\(\frac{11}{7}\) + \(\frac{6}{7}\) \(\sqrt{2}\)
Step-by-step explanation:
Given
\(\frac{3+\sqrt{2} }{3-\sqrt{2} }\)
Multiply the numerator/ denominator by the conjugate of the denominator.
The conjugate of 3 - \(\sqrt{2}\) is 3 + \(\sqrt{2}\) , thus
= \(\frac{(3+\sqrt{2})(3+\sqrt{2}) }{(3-\sqrt{2})(3+\sqrt{2}) }\) ← expand numerator/ denominator using FOIL
= \(\frac{9+6\sqrt{2}+2 }{9-2}\)
= \(\frac{11+6\sqrt{2} }{7}\)
= \(\frac{11}{7}\) + \(\frac{6}{7}\) \(\sqrt{2}\) ← in the form a + b\(\sqrt{2}\)
with a = \(\frac{11}{7}\) and b = \(\frac{6}{7}\)
Express each decimal as a fraction in simplest form. help-
Answer:
1. 1/2
2. 4/5
3. 9/10
4. 3/4
5. 12/25
6. 18/25
Step-by-step explanation:
Y= -5x. please help me this assignment is worth most my gradeee
Answer:
The answer is the screenshot shown.
Step-by-step explanation:
How to graph it in that is to check the given first.
y= -5x
x = 0
y = -5
-
So you will have to plot the line at 0 for x and for y, you should put it at -5
ADJACENT AND VERTICAL ANGLES Tell whether the angles
are adjacent, vertical, or neither. Explain.
13.
14.
95°
60°
70°
60°
The angles 95° and 60° are neither adjacent nor vertical angles.
The angles 70° and 60° are adjacent angles.
The angles 95° and 60° are neither adjacent nor vertical angles. Adjacent angles are angles that share a common vertex and a common side. Vertical angles are a pair of non-adjacent angles formed by two intersecting lines. In this case, the angles 95° and 60° do not meet the criteria for being adjacent or vertical angles as they do not share a common vertex or a common side, nor are they formed by intersecting lines.
The angles 70° and 60° are adjacent angles. Adjacent angles are angles that share a common vertex and a common side. In this case, the angles 70° and 60° share the common vertex at the point where the sides intersect and also share the common side formed by the intersection of the lines. Therefore, the angles 70° and 60° are adjacent angles.
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Please help!! I have 10 minutes left!!
8/54
Find the Highest Common Factor of 32 and 24.
Answer:
Easy its 8
Step-by-step explanation:
Answer:
8
Step-by-step explanation:
(6x+15)°
63° triangle
Answer:
x = 2
Step-by-step explanation:
The sum of the 3 angles in the triangle = 180°
Sum the 3 angles and equate to 180
6x + 15 + 90 + 63 = 180
6x + 168 = 180 ( subtract 168 from both sides )
6x = 12 ( divide both sides by 6 )
x = 2
The city of London, England, has an
elevation of 11 meters.
Which of these describes the elevation
of London?
below sea level
at sea level
above sea level
Answer:
above sea level
Step-by-step explanation:
An author published a book which was being sold online. The first month the author
sold 22000 books, but the sales were declining steadily at 7% each month. If this
trend continues, how many total books would the author have sold over the first 20
months, to the nearest whole number?
The author would have sold 365396 books over the first 20 months.
The author sold 22000 books in the first month, and the sales declined by 7% each month.
This means that the number of books sold in each subsequent month is 93% of the number sold in the previous month (since 100% - 7% = 93%). Therefore, the number of books sold in the second month is:
0.93×22000
= 20460
The number of books sold in the third month is:
0.93 × 20460 = 19007
To find the total number of books sold over the first 20 months, we can use the formula for the sum of a geometric series:
S = a(1 - rⁿ) / (1 - r)
Substituting the values, we get:
S = 22000(1 - 0.93²⁰) / (1 - 0.93)
S = 22000(0.766)/0.07
S=240743
Therefore, the author would have sold 365396 books over the first 20 months.
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What is the simplified form of 4−2(3)−3
4
x
−
2
(
3
y
)
−
3
?
Answer:
the answer is -5 hope this is helpfull
Step-by-step explanation:
Answer:
4x-6y-3
Step-by-step explanation:
4x-2(3y)-3
put the things that look the same together
10.187 electric poles were fixed along a road at a regular interval of 20m. What was the total
distance fixed with the poles in km?
Answer:
203.74
Step-by-step explanation:
10.187x20=203.74m
203.74 = 0.20374 kilometres
i dont know the answers, can someone help?
Answer:
you are corrcet
Step-by-step explanation:
HELP 7GRADE MATH FOR 10 POINTSS! PLUS BRAINLIST
Answer:
Highest: 1277 meters. Closer to sea level: -969 meters
A can do a piece of work in 3 days and B in 6 days. In how many days will they do it together?
Answer: 2 days
Step-by-step explanation:
We will add there work together
= 1/3 + 1/6
= 2/6 + 1/6 (LCM 6)
= 3/6
= 1/2
Therefore 1/2 = 2 days
Therefore it will take them 2 days
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Two step equation help me pls step by step
The questions 36 and 37
Answer:
Step-by-step explanation:
SOLVING
================================================================
Question 36
6=-2(7-c)
Use distribution to multiply -2 by parenthesis
6=-14+2c
Add to both sides 14
20=2c
Divide 2 into both sides
10=c
Question 375(h-4)=8
Use distribution to multiply 5 by the parenthesis
5h-20=8
Add to both sides 20
5h=28
Divide 5 into both sides
\(h=\frac{28}{5}\)
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23. Match the figure with the number of unit cubes that would be needed to build each figure. Not every number of unit cubes will be used.
We can see here that:
Figure 1 - 7 unit cubes.Figure 2 - 6 unit cubes.What is cube?A cube is a three-dimensional geometric shape that has six square faces, all of which are congruent (equal in size) and perpendicular to each other. It is a special type of rectangular prism where all edges have the same length, and all angles are right angles (90 degrees).
Cubes are commonly encountered in everyday life, such as dice, boxes, and Rubik's Cube puzzles. They have precise and uniform geometry, making them useful in various mathematical and engineering applications.
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What is the solution for x in the equation 5(x-4)=2+3x
Answer:
x = 111 --> value of x
Answer:
x = 11
Step-by-step explanation:
5(x - 4) = 2 + 3x
5x - 20 = 2 + 3x
+20 +20
--------------------------
5x = 22 + 3x
-3x -3x
---------------------------
2x = 22
/2 /2
----------------------------
x = 11
GIVING BRAINLIEST AND EXTRA POINTS! Write the equation of the linear relationship in slope-intercept form, using decimals as needed. Show your work.
x: 25,35,45,55
y: 94,88,82,76
The equation that represents this relationship is y = ?
For every 10 unit increase in x, there's a 6 unit decrease in y.
Your slope is -6/10 or -3/5.
This gives us y = -3/5 x + b.
Using (25,94), we can solve for b:
94 = -3/5 (25) + b
94 = -15 + b
109 = b
So, y = -3/5 x + 109.
Let's double check it works with x = 45:
y = -3/5 (45) +109
= -27 + 109
= 82
Looks like we're good.
Answer:
I do not know
Step-by-step explanation:
sorry but can me still have brainliest?
which of the following are identities
The identities among the given statements are:
tan x = sin x / cos x
sin x / tan x = cos x
We have,
Let's analyze each of the given statements to determine whether they are identities:
tan x = sin x / cos x:
This is an identity.
It is known as the fundamental identity of trigonometry, as it holds true for all values of x (except when cos x is equal to 0).
tan x cos x = sin x:
This is not an identity.
It is a specific equation that may be true for certain values of x, but it does not hold true for all values of x.
cos x = tan x sin x:
This is not an identity.
Similar to the previous statement, it is a specific equation that may be true for certain values of x, but it does not hold true for all values of x.
sin x / tan x = cos x:
This is an identity.
It can be derived from the fundamental identity by dividing both sides by cos x, resulting in sin x / cos x = cos x / cos x, which simplifies to sin x / tan x = cos x.
Thus,
The identities among the given statements are:
tan x = sin x / cos x
sin x / tan x = cos x
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A box of volume 324 m3 with a square bottom and no top is made of two different materials. The cost of the bottom is $40/m2 and the cost of the sides is $30/m2. Find the dimensions of the box that minimize the total cost.
The dimension of the box is:
Bottom length \(3\sqrt[3]{18}\) m
Height \(2\sqrt[3]{18}\) m
DifferentialIf the length of the bottom is x and the height is y. The volume of the box equation will be:
\(V=x^{2} y=324\)
To find the cost for making the box is measure the surface area of box (1 bottom and 4 side)
\(A=x^{2} +4xy\)
And if the material of bottom is $40 per meter square and the sides is $30 per meter square, the cost for making the box is:
\(cost=40(A_{bottom})+30(A_{sides})\\cost=40(x^{2} )+30(4xy)\\cost=40x^{2} +120xy\)
From volume equation we can substitute one variable to make one variable function.
\(V=x^{2} y=324\)
\(x^{2} y=324\\y=\frac{324}{x^{2} }\)
Let's substitute y to cost function.
\(cost=40x^{2} +120xy\\cost=40x^{2} +120x(\frac{324}{x^{2} } )\\cost=40x^{2} +\frac{38880}{x}\)
I know there is big number, so let's make it become exponent.
\(cost=40x^{2} +\frac{38880}{x}\\cost=2^{3}5x^{2} +2^{5} 3^{5}5x^{-1}\)
To make the minimal cost, we can differentiate the cost function.
\(cost=2^{3}5x^{2} +2^{5} 3^{5}5x^{-1}\\\frac{dy}{dx}=(2)2^{3}5x+(-1)2^{5} 3^{5}5x^{-2}\\\frac{dy}{dx}=2^{4}5x-2^{5}3^{5}5x^{-2}\)
After we differentiete it, when we find the minimum/ maximum point, we equal the equation to zero.
\(2^{4}5x-2^{5}3^{5}5x^{-2}=0\\2^{4}5x=2^{5}3^{5}5x^{-2}\\x^{3}=2.3^{5}\\x=(2.3^{5})^{\frac{1}{3} } \\x=2^{\frac{1}{3} } 3^{\frac{5}{3} }\\x=3\sqrt[3]{2.3^{2} } \\x=3\sqrt[3]{18}\)
Then we got the length of the bottom. After that we find the height of the box (y)
\(y=\frac{324}{x^{2} }\\y=\frac{324}{(2^{\frac{1}{3}}3^{\frac{5}{3} } )^{2} }\\y=\frac{2^{2} 3^{4} }{2^{\frac{2}{3}}3^{\frac{10}{3} } }\\y=2^{\frac{4}{3} }3^{\frac{2}{3} }\\y=2\sqrt[3]{2.3^{2} } \\y=2\sqrt[3]{18}\)
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9p + 8 Math fraction
Answer:
17p
Step-by-step explanation:
9p+8p=17p
write the answer in the simplest form 2/3 x 4/7
Answer:
the answer is 8/21
Step-by-step explanation:
to be sure that it's right 21 can't be divided by 8 and the two numbers don't have an LCD ( Least Common Denominator )
Natasha used 21 square tiles to make a rectangle. Which of the following could be the dimensions of her rectangle?
A: 21x21 C: 5x6
B: 7x3 D: 4x7
Answer:
7×3
Step-by-step explanation:
option b
i hope it is helpful for you
Answer: B. 7x3
This is because 7 times 3 = 21. The other answer choices do not multiply to 21.
Think of it like having 7 rows and 3 columns to give 21 squares overall to make this larger rectangle.
Help on gradpoint!!!
I think the 3rd one, please let me know if I'm wrong. I don't want to give others the incorrect answer.
Step-by-step explanation:
2 x -3 (x) - 1 (y) - 2 x -1 (z) = -5
Answer:
(-3,1,-1)............
Question 15 The Six Sigma DMAIC approach is the best way to attack all problems and should be employed whenever possible, O True O False Next Previous
False. The Six Sigma DMAIC approach is best suited for number of problems and issues that require a systematic approach and have measurable results. It should not be employed for all problems as some may require a different approach.
The Six Sigma DMAIC (Define, Measure, Analyze, Improve, Control) approach is a systematic process that is used to identify and eliminate defects in processes, products, or services. This approach is best suited for problems and issues that have a structured approach, measurable results, and an opportunity for improvement. However, it should not be employed for all problems as some may require a different approach such as root-cause analysis or process mapping. Additionally, some number of problems may require creative solutions that cannot be addressed using the DMAIC approach. In these cases, alternative approaches such as brainstorming or design thinking should be employed.
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