The values in the formula for the cosine of the angle between the planes:
[tex]\frac{{2\sqrt 3 }}{{3\sqrt 3 }} = \frac{2}{3}\][/tex]
The angle between the planes is: 48.19 degrees.
The angle between the planes, √3x + 2 − 5 = 0 and
2x + 2 − √3z + 10 = 0
can be determined using the formula:
[tex]\[\cos \theta =n_1.n_2[/tex]
where [tex]\[\cos \theta \][/tex] is the angle between the planes and [tex]n_1[/tex] and [tex]n_2[/tex]
are the normal vectors to the planes.
The normal vectors can be written as:
[tex]\[{n_1} = \left\langle {\sqrt 3 ,0,0} \right\rangle \]and \[{n_2} = \left\langle {2,0, - \sqrt 3 } \right\rangle \][/tex]
The dot product of the normal vectors can be calculated as:
[tex]\[{n_1}.{n_2} = \left\langle {\sqrt 3 ,0,0} \right\rangle .\left\langle {2,0, - \sqrt 3 } \right\rangle \\= \sqrt 3 \times 2 + 0 + 0 = 2\sqrt 3 \][/tex]
Magnitude of [tex]\[{n_1}\][/tex] can be calculated as:
[tex]\[\left\| {{n_1}} \right\| = \sqrt {{{\left( {\sqrt 3 } \right)}^2} + {{(0)}^2} + {{(0)}^2}} \\= \sqrt 3 \][/tex]
Magnitude of [tex]\[{n_2}\][/tex]
can be calculated as:
[tex]\[\left\| {{n_2}} \right\| = \sqrt {{{\left( 2 \right)}^2} + {{(0)}^2} + {{\left( { - \sqrt 3 } \right)}^2}} = 3\][/tex]
Now, we can plug the values in the formula for the cosine of the angle between the planes:
[tex]\[\cos \theta =n_1.n_2\\ = \frac{{2\sqrt 3 }}{{3\sqrt 3 }} = \frac{2}{3}\][/tex]
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Which is the correct stem-and-leaf plot for the data set?
16, 15, 47, 41, 40, 39, 16, 37
Answer:
the first plotting was correct.
Step-by-step explanation:
the values will be arranged in an ascending order from their roots which are the first digit
A math teacher is trying to analyze her test grades. She surveys the students to find out how many minutes they studied. She then makes a scatterplot of time studying and test grades.
What is the domain?
A) the students' grades on their tests
B) the number of students in the class
C) the different courses the teacher teaches
D) the number of minutes the students studied
In the context of analyzing the relationship between studying time and test grades, the domain of the scatterplot would be the number of minutes the students studied (option D).
The domain refers to the set of possible inputs or variables in a given context. In this case, the scatterplot is being created based on the relationship between the time students spent studying and their corresponding test grades. Therefore, the domain in this context would be the number of minutes the students studied (option D).
The domain represents the independent variable, which is the variable that is controlled or manipulated in the analysis. In this scenario, the math teacher wants to analyze the relationship between studying time and test grades, so the number of minutes studied would be the independent variable. The teacher surveys the students to collect data on the time spent studying, and this variable becomes the domain of the scatterplot.
The range, on the other hand, represents the dependent variable, which is the variable that is measured or observed as an outcome or response. In this case, the dependent variable would be the students' test grades. The scatterplot will show how the test grades correspond to the amount of time students studied.
To summarize, in the context of analyzing the relationship between studying time and test grades, the domain of the scatterplot would be the number of minutes the students studied (option D).
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11 Megan has $500 in her savings account. The interest rate is 7%, which is not compounded. How much money in dollars) will she have in her account after 5 years? Write the correct
answer.
Answer:
701
Step-by-step explanation:
At the end of 5 years, your savings will have grown to $701.
You will have earned in $201 in interest.
answer.
use a reference angle to write sec290 (where the angle is measured in degrees) in terms of the secant of a positive acute angle. do not include the degree symbol in your answer.
sec 290° = 1/cos 110°= -2.9238.
To find the value of sec 290° using a reference angle, we first need to determine the reference angle for 290°.
The reference angle is the acute angle formed between the terminal side of the given angle (290°) and the x-axis. To find the reference angle, we subtract the nearest multiple of 180° from the given angle:
Reference angle = 290° - 180° = 110°
Now, we can express sec 290° in terms of the secant of the reference angle (110°). The secant function is defined as the reciprocal of the cosine function:
sec(x) = 1/cos(x)
Therefore, sec 290° can be written as:
sec 290° = 1/cos 110° = -2.9238.
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A firm's marginal revenue and marginal cost functions are given by MR = R'(x) = 205 -0.5x2 and MC = C'(x) = 85 +0.7x2. Fixed costs are 10. a) Write down an expression for total revenue and deduce the corresponding demand function. Write down an expression for the total cost function. c) Determine the maximum profit.
a) The expression for total revenue is:
[tex]R(x) = \int MR(x) dx = \int (205 -0.5x^2) dx = 205x - 0.25x^3[/tex]
The demand function is:
[tex]x = R^{-1}(R) = \frac{205}{0.25R + 1}[/tex]
b) The expression for the total cost function is:
[tex]C(x) = \int MC(x) dx = \int (85 +0.7x^2) dx = 85x + 0.21x^3 + 10[/tex]
c)The maximum profit, is 1079.56
How to write an expression for total revenue and deduce the corresponding demand function?a) Total revenue is the integral of marginal revenue. Thus, expression for total revenue is:
[tex]R(x) = \int MR(x) dx = \int (205 -0.5x^2) dx = 205x - 0.25x^3[/tex]
The demand function is the inverse of the total revenue function:
[tex]x = R^{-1}(R) = \frac{205}{0.25R + 1}[/tex]
b) Total cost is the integral of marginal cost:
[tex]C(x) = \int MC(x) dx = \int (85 +0.7x^2) dx = 85x + 0.21x^3 + 10[/tex]
c) Profit is total revenue minus total cost:
P(x) = R(x) - C(x) = 205x - 0.25x³ - (85x + 0.21x³ + 10) = 120x - 0.46x³ - 10
To find the maximum profit, we need to find the point where marginal profit is zero. Marginal profit is the derivative of profit:
P'(x) = 120 - 1.38x² = 0
Solve for x:
120 - 1.38x² = 0
1.38x² = 120
x² = 120/1.38
x = √(120/1.38)
x = 9.33
We find that the maximum profit is achieved when x = 9.33. Thus, the maximum profit:
P(9.33) = 120(9.33) - 0.46(9.33)³ = 1079.56
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I really need help with this
Answer:add 11 on both sides sorry
Answer: subtract 11 from both sides
Step-by-step explanation: this was an assigned assignment for me two days ago
Expand x(4 --3.4y) show FULL work
Answer:
4x - 3.4xy
Step-by-step explanation:
x(4 - 3.4y)
4x - 3.4xy
a grating that has 3200 slits per cm produces a third-order fringe at a 24.0 ∘ angle.
To solve this problem, we can use the grating equation:
m * λ = d * sin(θ)
Where:
m is the order of the fringe
λ is the wavelength of light
d is the slit spacing (distance between adjacent slits)
θ is the angle of the fringe
In this case, we're given:
m = 3 (third-order fringe)
θ = 24.0°
We need to calculate the slit spacing (d) using the information that the grating has 3200 slits per cm. First, we convert the number of slits per cm to the slit spacing in meters:
slits per cm = 3200
slits per m = 3200 * 100 = 320,000
Now we can calculate the slit spacing (d):
d = 1 / (slits per m)
d = 1 / 320,000
Now, let's substitute the given values into the grating equation and solve for λ (wavelength):
m * λ = d * sin(θ)
3 * λ = (1 / 320,000) * sin(24.0°)
λ = (1 / (3 * 320,000)) * sin(24.0°)
Using a calculator, we can calculate the value of λ:
λ ≈ 5.79 × 10^(-7) meters or 579 nm
Therefore, the wavelength of light for which the grating with 3200 slits per cm produces a third-order fringe at a 24.0° angle is approximately 579 nm.
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Let W = {a + 2x + bx^2 ∈ P2 : a, b ∈ R} with the standard operations in P2. Which of the following statements is true?
A. W is not a subspace of P2 because 0 € W.
The above is true
B. W is a subspace of P2.
The above is true
C. None of the mentioned
D. 1+xEW
A subspace must satisfy three conditions: closure under addition, closure under scalar multiplication, and containing the zero vector. Therefore, the correct statement is B. W is a subspace of P2.
In order to determine whether statement A or B is true, we need to check the subspace criteria.
Let's analyze the statements:
A. W is not a subspace of P2 because 0 € W.
If 0 € W, then W does not contain the zero vector. However, the zero vector is the polynomial 0 + 2(0)x + (0)x^2 = 0, which is an element of W. Thus, statement A is false.
B. W is a subspace of P2.
For W to be a subspace, it needs to satisfy all three subspace criteria. Let's check each criterion:
Closure under addition: Let's take two arbitrary polynomials in W: a + 2x + bx^2 and c + 2x + dx^2. Their sum is (a + c) + 2x + (b + d)x^2, which is also a polynomial in W. Therefore, W is closed under addition.Closure under scalar multiplication: Let's take an arbitrary polynomial in W: a + 2x + bx^2. If we multiply it by a scalar, say k, we get k(a + 2x + bx^2) = ka + 2kx + bkx^2, which is still a polynomial in W. Hence, W is closed under scalar multiplication.Contains the zero vector: The zero vector is the polynomial 0 + 2(0)x + (0)x^2 = 0, which is an element of W. Therefore, W contains the zero vector.Since W satisfies all three subspace criteria, statement B is true.
Therefore, the correct statement is B. W is a subspace of P2.
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if T= 101+102+103+...+199 find T
...............................................
What is the surface area of this prism?
5 yd
5 yd
11 yd
6 yd
PLEASEEEE HELP ‼️‼️1️⃣
Answer:
8/7
Step-by-step explanation:
12*2=24.
7*3=21
24/21 is divisible by 3
=8/7
factor 5a2 – 30a 40. question 17 options: a) 5(a – 2)(a 4) b) 5(a – 2)(a – 4) c) (5a – 5)(a – 8) d) (a – 20)(a – 2)
The answer that you are looking for is b) 5(a – 2)(a – 4). In order to factor the formula, we must first locate two numbers whose sum is equal to -30 and whose product is equal to 40. Both constraints are met by the values -4 and -10, and as a result, we are able to factor the statement as 5(a – 2)(a – 4).(option b)
The following procedures can be used by us while factoring polynomials:
Find two numbers that, when added together, give you the coefficient of the middle term, and then multiply those two values by themselves to get the constant term.
Create the expression as the product of two binomials, with each binomial having one of the two numbers discovered in step 1. Write the equation as a product of two binomials.
Eliminate any factors that are frequent.
In this particular instance, the coefficient of the intermediate term is -30, while the value of the constant term is 40. When added together, the numbers -4 and -10 equal -30, and when multiplied together, they equal 40. Therefore, the expression can be factored as 5(a minus 2)(a minus 4).
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How many bit strings of length 8 can you have if each string has
only two zeros that are never together
There are 28 different bit strings of length 8 that satisfy the condition of having two zeros that are never together.
To count the number of bit strings of length 8 with two zeros that are never together, we can use the concept of combinations.
First, let's consider the possible positions for the two zeros. The zeros cannot be adjacent to each other, which means they must be placed in non-adjacent positions in the string.
Since there are 8 positions in the string, we can choose 2 positions for the zeros in C(8, 2) ways. This gives us the number of ways to select the positions for the zeros.
Once we have chosen the positions for the zeros, the remaining 6 positions must be filled with ones. There is only one way to do this, as all the remaining positions will be filled with ones.
Therefore, the total number of bit strings of length 8 with two zeros that are never together is equal to C(8, 2) = 28.
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help me please, i’m confused. thanks!
Answer:
Step-by-step explanation:
Marissa has a yard service to help people in her neighborhood. She earns $15 for each lawn she mows, $10 for each yard she weeds, and $5 for each yard she rakes. This month Marissa spent $3 on flyers to send out to neighbors, she purchased a new blower for $26, and paid her brother $18 for helping her mow lawns. If Marissa mowed 4 lawns and raked 8 yards, how much money did she make in profit? 1. 53 2. 100 3. 36 4. 71
Answer:
100-47=53 so 53$ profit
Step-by-step explanation:
Find the radius of a cone with a volume of 196 x 3.14 mm and a height of 12 mm.
Answer:
r=7 my
answer needs to be 20 characters long
Please answer correctly! I will mark you as Brainliest!
Answer:
I have actually done this before, I got it right and I chose C!
hope this helps. love u guys!
Answer:
The 4th answer choice
Explain:
195 divided by 3 is 65. Then the diameter of 307 needs to be divided by 2 to get the radius. Now take the radius and square it to get 23562.25. Now times 3.14. Lastly, multiply by the 65 to get 4809055.225. Hope that helps! :)
Sam just purchased a new car. After his employee discount and the sale that the dealership applied to the original
price, Sam paid $13,734.60. If Sam's employee discount was applied to the original price after the dealer discount,
then determine the original price of the vehicle given that the employee discount was 8% and the dealership
discount was 25%. Round your answer to the nearest cent.
a $20,375.21
c. $19,250.13
b. $18,350.33
d. $19,905.22
Answer:
D 19,905
Step-by-step explanation:
19,905.22×25%=4976.31
19905.22-4976.31=14,928.91
14928.91×8%=1194.31
14928.91-1194.31=13734.6
Ahmed received a box of gifts. The box is a rectangular prism with the same height and width, and the length
is twice the width. The volume of the box is 3,456 in? What is the height of the box?
Answer:
12 inches
Step-by-step explanation:
Ahmed received a box of gifts. The box is a rectangular prism with the same height and width, and the length
is twice the width. The volume of the box is 3,456 in? What is the height of the box?
Volume of a Rectangular pyramid = Length × Width × Height
From the above question
Height = Width = x
Length = 2 × Width
Length = 2x
Volume = 3,456 cubic inches
Hence,
3,456 = 2x × x × x
3456 = 2x³
x³ = 3456/2
x³ = 1728
Cube root both sides
Cube root(x³) = cube root (1728 cubic Inches)
x = 12 inches
Therefore, the height is 12 inches
Width, Height and Length of rectangular prism are 12, 12 and 24 inch respectively.
Assume;Width of rectangular prism = a
Height of rectangular prism = a
Length of rectangular prism = 2a
We know that;Volume of the rectangular prism = (l)(b)(h)
Volume of the rectangular prism = (2a)(a)(a)
3,456 = 2a³
a³ = 1,728
a = 12 inch
So,
Width of rectangular prism = 12 inch
Height of rectangular prism = 12 inch
Length of rectangular prism = 2(12)
Length of rectangular prism = 24 inch
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What is the volume of the can below? Use Pi = 3.14 and round your answer to the nearest tenth. A cylinder with height 96 millimeters and diameter of 66 millimeters.
Answer
328,268.2 mm cubed is correct!
Step-by-step explanation:
If you use the formula V=πr²h with these steps:
1. Calculate the area of the base (which is a circle)
2. use the equation πr² where r is the radius of the circle.
3. Then, multiply the area of the base by the height of the cylinder
4. The volume is found!
Answer:
328,268.2 cubic millimeters
Step-by-step explanation:
I did it on edge
8 divided by 618 ..............
Answer:
0.0129449838188
A researcher would like to estimate the mean amount of money the typical American spends on lottery tickets in a month. The researcher would like to estimate the mean with 99% confidence. Which sample size options would yield the smallest margin of error?
Based on the formula, we can say that the margin of error will be reduced if the sample size is increased.
To obtain the smallest margin of error with 99% confidence, a sample size of 1689 would be needed.
A margin of error refers to the degree of error that may arise due to chance when attempting to estimate a population parameter such as a mean. It is calculated as the product of a critical value, a standard deviation, and a confidence interval, then divided by the square root of the sample size.
N is the sample size, which refers to the number of items included in the sample from the population. A larger sample size would be beneficial since it lowers the margin of error. When the sample size rises, the standard error of the mean decreases, implying that we are more confident in our estimate of the population mean. A smaller margin of error is desirable since it results in a more precise estimate of the population parameter.
The formula for the margin of error is given by:
Margin of Error = (Critical Value) (Standard Deviation) / sqrt(N).
To obtain the smallest margin of error with 99% confidence, a sample size of 1689 would be needed. The formula for the sample size calculation for this scenario is:
N = [(Zα/2)σ / E]²
Where, Zα/2 = 2.58, σ is the standard deviation, and E is the margin of error.
Using Zα/2 = 2.58 for a 99% confidence interval and the smallest possible margin of error to obtain a sample size for which the margin of error is minimized, we have:
N = [(Zα/2)σ / E]² = [(2.58)σ / E]²
Since the goal is to minimize the margin of error, we use the smallest possible value for E:1.
Therefore, N = [(2.58)σ / 1]²2.
Solving for N:
N = 6.6564σ²
To obtain the smallest margin of error with 99% confidence, we must solve for the smallest possible value of N that satisfies the above equation. We obtain:
N = 6.6564σ²
We don't have any information about the standard deviation, σ, in the given question, so we can't solve for N.
However, based on the formula, we can say that the margin of error will be reduced if the sample size is increased.
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What percent of a day does this child spend doing homework? (Round to the nearest whole percent)
Answer:
Step-by-step explanation:
Look at the graph, look at homework and then look at the number right outside of it.
Does the residual plot show that the line of best fit is appropriate for the data?
The correct statement regarding the residual plot in this problem, and whether the line of best fit is a good fit, is given as follows:
Yes, the points have no pattern.
What are residuals?For a data-set, the definition of a residual is that it is the difference of the actual output value by the predicted output value, hence it is defined by the subtraction operation as follows:
Residual = Observed - Predicted.
Hence the graph of the line of best fit should have the smallest possible residual values, and no pattern between the residuals.
As there is no pattern between the residuals in this problem, the line is in fact a good fit and the first option is the correct option.
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A bag contains white, blue and red ping-pong balls in the ratio 8 : 3 : 2. There are 10 balls. If 10 white and 10 blue balls are removed from the bag, the new ratio is ?
Answer:
the new ratio of white, red and blue balls is 6:2:1
Step-by-step explanation:
The computation of the new ratio is shown below:
If you have 10 red balls, so the blue balls is in proportion of 3:2 that means 15 would be the blue balls. In addition to this, the while balls is in proportion 8:2 = 4:1 so there is a 40 white balls
Now if 10 white and 10 blue balls would be eliminated
So there is 30 white, 10 red, 5 blue bals
Also
30 = 5 × 6
And,
10 = 5 × 2
so the new ratio of white, red and blue balls is 6:2:1
PLEASE HELP ME OUT! QUICK POINTS FOR YOU!
All information needed can be found in the image below
Thank you in advance.
Answer:
circle area = 50.24 units²
Step-by-step explanation:
circle area = πr² = 3.14(4²) = 3.14(16) = 50.24 units²
Over a 5-year period, a company reported annual profits of $8 million, $3 million, $2 million, and $9 million. In the fifth year, it reported a loss of $7 million. What was the mean annual profit?
Given
Annual profits of four years $8 million, $3 million, $2 million, and $9 million.
In the fifth year, it reported a loss of $7 million.
To find:
The mean annual profit.
Solution:
Formula for mean is:
[tex]\text{Mean}=\dfrac{\text{Sum of observations}}{\text{Number of observations}}[/tex]
Annual profits are $8 million, $3 million, $2 million, $9 million and -$7 million. Here negative sign represent loss.
So, the mean annual profit is:
[tex]\text{Mean}=\dfrac{8+3+2+9+(-7)}{5}[/tex]
[tex]\text{Mean}=\dfrac{22-7}{5}[/tex]
[tex]\text{Mean}=\dfrac{15}{5}[/tex]
[tex]\text{Mean}=3[/tex]
Therefore, the mean annual profit is $3 million.
Caught error while evaluating the code in this question: syntax error, unexpected" Let S be the universal set, where: Let sets A and B be subsets of S, where: LIST the elements in the set (AUB) [(AUB)]={ } Enter the elements as a list, separated by commas. If the result is the empty set, enter DNE You may want to draw a Venn Diagram to help answer this question.
The solution to the problem is `{5, 10, 15, 20, 25, 30}`.
The error message "syntax error, unexpected" is a common message you might encounter when there is a syntax error in your code.
This error message often points to an unexpected symbol or typo in your code. For instance, in the context of a code snippet like this, such an error message could be prompted due to an invalid command or misspelling, or a misused symbol or expression.
Also, another likely cause could be an incorrect use of a function or a non-existent variable or keyword. Hence, to solve the error message, you might need to double-check your code and fix any errors that could cause such an issue. Now, let's answer the question that follows: Given the universal set, S, as;`S = {5, 10, 15, 20, 25, 30}` and the subsets A and B as; A = {5, 10, 15, 20} B = {15, 20, 25, 30}.
To list the elements in the set (AUB) we need to find the union of A and B. The union of two sets A and B is a set of all the elements that are either in A or in B or in both. That is, `AUB = {x: x ∈ A or x ∈ B}`
Therefore, the union of sets A and B is the set `AUB = {5, 10, 15, 20, 25, 30}`
Thus, the list of elements in the set (AUB) is:`{5, 10, 15, 20, 25, 30}` Hence, the solution to the problem is `{5, 10, 15, 20, 25, 30}`.
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What is the value of t? need an answer asap
Answer:
im pretty sure its 69
Step-by-step explanation:
im not joking im pretty sure both angles are 69 because of the triangle formula