The area of the triangular parcel of land is approximately 305,682.4 square feet.
We can use Heron's formula to find the area of a triangular parcel of land. This formula states that the area of a triangle with sides a, b, and c is given by:
Area = √(s(s-a)(s-b)(s-c))
where s is the semi-perimeter of the triangle, given by:
s = (a + b + c)/2
Using the lengths of the sides given in the problem, we can calculate the semi-perimeter:
s = (860 + 820 + 1038)/2 = 1759
Then we can plug this value into Heron's formula to find the area:
Area = √(1759(1759-860)(1759-820)(1759-1038))
Area = √(1759×899×939×721)
Area = √(93587715844)
Area = 305682.4 square feet (rounded to the nearest tenth)
Therefore, the area of the triangular parcel of land is approximately 305,682.4 square feet.
Learn more about Heron's formula here:
https://brainly.com/question/29184159
#SPJ11
write the sum using sigma notation. 12 22 32 132 k = 1
In sigma notation, the sum is represented as follows: ∑ (k^2 + 1), k = 1 to 2.
The given sum is: 12 + 22 + 32 + 132.
To write this sum using sigma notation, we can observe the pattern in the terms. The first term is 12, the second term is 22 (which is 12 + 1), the third term is 32 (which is 22 + 1), and the fourth term is 132 (which is 32 + 1 + 2).
We can see that each term is obtained by adding the square of the position number (k^2) to the previous term, along with an additional constant value of 1 or 2 depending on the position.
So, let's write the sum using sigma notation:
∑ [(k^2 + c(k-1))], where k starts from 1 and goes up to 4.
In this notation, k represents the position of the term, k^2 represents the square of the position number, and c represents the constant value added to the previous term.
For the given sum, the constant value c changes depending on the position of the term:
For the first term (k = 1), c is 1.
For the second term (k = 2), c is 1.
For the third term (k = 3), c is 1.
For the fourth term (k = 4), c is 2.
So, the corrected sigma notation for the given sum is:
∑ [(k^2 + c(k-1))], k = 1 to 4.
This indicates that we sum the terms (k^2 + c(k-1)) as k takes values from 1 to 4, where c changes based on the position of the term.
To know more about sigma notation,
https://brainly.com/question/31131419
#SPJ11
What expressions are equivalent to 8x+72
which ordered pairs are solutions to the equation 6x + 5y=5? a. (2,−7/5), b. (3,−13/5), c. (0,1), d. (7,5) e. none of the above
Answer:
[tex]a. \: (2. \frac{ - 7}{5} )[/tex]
Step-by-step explanation:
Greetings!!!!
To get the answer substitute these values that are given in the choices to the equation and crosscheck the expression.
[tex]6(2) + 5( \frac{ - 7}{5} ) = 5[/tex]
cancel out 5 by 5
[tex]12 - 7 = 5[/tex]
subtract 7 from 12
[tex]5 = 5[/tex]
If you have any questions tag it on comments
Hope it helps!!!!
What is the equation of the line???
Answer:
y = -3x - 1
Step-by-step explanation:
Pick any 2 points on the line and find the slope, m:
(-1, 2) and (1, -4)
m = (-4 - 2) / (1 - -1) = -6/2 = -3
The y-intercept, b, is -1 (read it right off the graph, where the line passes through the y axis).
Equation of the line in y = mx + b form:
y = -3x - 1
find all solutions of the given equation. 36 sin2() − 1 = 0
The Trigonometric Equation solutions to the equation 36 sin²θ - 1 = 0 are:
[tex]θ ≈ 22.08°[/tex] + 360°k, 157.92° + 360°k, 202.08° + 360°k, 337.92° + 360°k
where k is an integer.
We can start by using the trigonometric identity:
sin²θ + cos²θ = 1
Rearranging the terms, we get:
sin²θ = 1 - cos²θ
Substituting this into the original equation:
36 sin²θ - 1 = 0
36(1 - cos²θ) - 1 = 0
Expanding and simplifying:
36 - 36cos²θ - 1 = 0
35 = 36cos²θ
cos²θ = 35/36
Taking the square root of both sides:
cosθ = ±√(35/36)
Now we can use a calculator to find the approximate values of θ:
[tex]θ ≈ 22.08°[/tex], 157.92°, 202.08°, 337.92°
To find all solutions, we need to add multiples of 360° to each of these angles:
[tex]θ ≈ 22.08°[/tex] + 360°k, 157.92° + 360°k, 202.08° + 360°k, 337.92° + 360°k
where k is an integer.
Therefore, the Trigonometric Equation solutions to the equation 36 sin²θ - 1 = 0 are:
[tex]θ ≈ 22.08°[/tex] + 360°k, 157.92° + 360°k, 202.08° + 360°k, 337.92° + 360°k
where k is an integer.
For such more questions on Trigonometric Equation Solutions.
https://brainly.com/question/28025415
#SPJ11
Divide.
(20x2-12x+8)+ (2x+8)
280
2x-8
280
O 10x-34+.
O 10x +34+
O 10x +46 +
2x-8
376
2x-8
376
2x+8
O 10x-46+.
The final expression is 20(5x - 1)2 + 2x + 8.
The given expression is (20x2-12x+8)+ (2x+8). We are required to simplify the given expression.To do that, we will first simplify the expressions inside the parentheses followed by the addition.(20x2-12x+8) can be written as 4 * 5x2-3x+2. This is because we can take 4 as the GCF (Greatest Common Factor) from the given expression. 4 is also a perfect square so we can write 4 * 5x2-3x+2 as 2 * 2 * 5x2-3x+2.
This expression can further be simplified using the (a + b)2 formula which is a2 + 2ab + b2. In this case, a is 5x and b is 1. Hence, we can write 2 * 2 * 5x2-3x+2 as 2 * 2 * (5x - 1)2. Now, the given expression becomes 2 * 2 * (5x - 1)2 + (2x + 8).We will simplify this expression further by distributing the factor 2 on the right-hand side of the addition. Therefore, the given expression becomes 2 * 2 * (5x - 1)2 + 2x + 2 * 4. This can be simplified to get the following expression:20(5x - 1)2 + 2x + 8We have now successfully simplified the given expression.
For more questions on simplify
https://brainly.com/question/78672
#SPJ8
he number of breakdowns per week for a type of minicomputer is a random variable Y with a Poisson distribution and m ean λ. A random sample Yi, ½, . .. , Y, of observations on the weekly number of breakdowns is available. (a) Find an unbiased estimator for λ. (b) The weekly cost of repairing these breakdowns is -3Y + Y2. Show that E(C) = 4λ-A2 (c) Find a function of Yi, ½, , Y, that is an unbiased estimator of E(C). (Hint: Use what you know about and ()2)
a) An unbiased estimator for λ is [tex]\hat{\lambda}=\frac{1}{n}\sum Y_i[/tex]
b) E(C) = 4λ - λ²
c) [tex]\hat{C}=4\hat{\lambda}-(\hat{\lambda})^2[/tex] is an unbiased estimator of E(C).
(a) To find an unbiased estimator for λ, we can use the sample mean. The sample mean is an unbiased estimator for the population mean of a Poisson distribution.
Therefore, an unbiased estimator for λ is:
[tex]\hat{\lambda}=\frac{1}{n}\sum Y_i[/tex]
where n is the sample size and [tex]\sum Y_i[/tex] is the sum of the observed breakdowns.
(b) The weekly cost of repairing the breakdowns is given by C = -3Y + Y². To find the expected value of C, we need to compute E(C).
E(C) = E(-3Y + Y²)
Using linearity of expectation, we can split this into two parts:
E(C) = E(-3Y) + E(Y²)
Since Y follows a Poisson distribution with mean λ, we know that E(Y) = λ.
E(C) = -3E(Y) + E(Y²)
The second term E(Y²) can be computed using the variance of Y.
Var(Y) = λ
E(Y²) = Var(Y) + (E(Y))²
= λ + λ²
= λ(1 + λ)
Substituting this back into E(C):
E(C) = -3E(Y) + E(Y²)
= -3λ + λ(1 + λ)
= λ + λ² - 3λ
= λ² - 2λ
E(C) = 4λ - λ²
Therefore, E(C) = 4λ - λ²
(c) To find an unbiased estimator of E(C), we need to find a function of Y₁, Y₂, ..., Yₙ that is an unbiased estimator of E(C). Let's call this estimator [tex]\hat{C}[/tex].
[tex]\hat{C}=4\hat{\lambda}-(\hat{\lambda})^2[/tex]
Since [tex]\hat{\lambda}[/tex] is an unbiased estimator of λ (as derived in part (a)), [tex]\hat{C}[/tex] is an unbiased estimator of E(C).
Therefore, [tex]\hat{C}=4\hat{\lambda}-(\hat{\lambda})^2[/tex] is an unbiased estimator of E(C).
Learn more about Unbiased estimator here
https://brainly.com/question/32063886
#SPJ4
Find the inverse of f(x)=6x^2-7
The inverse of the given function is g'(x) = ±√x-7/6
Given that a function g(x) = 6x²-7,
We need to find the inverse of the given function.
To find the inverse of any function, we flip the x and y in the original function.
f(x) = 6x² - 7
y = 6x² - 7
x = 6y² - 7
6y² = x - 7
y = ±√x-7/6
Hence the inverse of the given function is g'(x) = ±√x-7/6
Learn more about inverse function click;
https://brainly.com/question/29141206
#SPJ1
From 1868
to 2010,
there were two African Americans who were elected to the US House of Representatives but denied their seat,
and so never served. One was elected in 1868,
and the other was elected in 1872. If these two were added to the total number of African American representatives from 1868
to 2010,
what percentage of representatives would have served in the time period from 1868
to 1930?
To calculate the percentage of representatives who would have served in the time period from 1868 to 1930, we need to determine the total number of African American representatives during that period.
From the information given, we know that there were two African American representatives who were elected but denied their seat. Therefore, the total number of African American representatives during the time period from 1868 to 1930 would be the number of African American representatives elected and served plus the two who were elected but denied their seat.
Let's assume there were "x" African American representatives who were elected and served during the period from 1868 to 1930.
So, the total number of African American representatives during that period would be (x + 2) because we are adding the two who were elected but denied their seat.
To calculate the percentage, we divide the number of African American representatives who served by the total number of representatives and multiply by 100:
Percentage = (x / (x + 2)) * 100
Unfortunately, we don't have the specific number of African American representatives who served during that period, so we cannot calculate the exact percentage.
Know more about percentage here:
https://brainly.com/question/28998211
#SPJ11
on checking with 95 families, it was found that 75 families subscribe to time, 50 to newsweek, and 5 to neither magazine. how many subscribe to both? families
We can solve this problem by using a Venn diagram. Let's start by drawing two circles, one for Time and one for Newsweek:
```
_________
/ \
/ \
/_______________\
| |
| |
| |
| |
| |
| Time |
| |
| |
| |
| |
|_______________|
\ /
\ /
\_________/
Newsweek
```
Let x be the number of families that subscribe to both magazines. Then, we know that:
- 75 - x subscribe to Time only
- 50 - x subscribe to Newsweek only
- 5 subscribe to neither
We want to find the value of x. We know that the total number of families surveyed is 95, so:
Total = Time only + Newsweek only + Both + Neither
95 = (75 - x) + (50 - x) + x + 5
Simplifying the equation, we get:
95 = 130 - x
x = 35
Therefore, 35 families subscribe to both Time and Newsweek.
radical(-4x) ⁴= ?????
The result of the expression radical(-4x)^4 is -16x² in the context of complex numbers.
The expression you provided, radical(-4x)^4, involves taking the fourth power of the square root of -4x. Let's break it down step by step.
First, let's simplify the square root of -4x:
√(-4x)
The square root of a negative number is not defined in the real number system. Therefore, this expression has no real number solution. In other words, the square root of -4x cannot be evaluated when considering only real numbers.
However, if we move to the complex number system, where the square root of negative numbers is defined, we can proceed further. In the complex number system, the square root of -1 is denoted as "i" or the imaginary unit.
Thus, if we rewrite the expression using the imaginary unit:
√(-4x) = 2i√x
Now, let's raise this expression to the fourth power:
(2i√x)^4
To raise a complex number to the fourth power, we need to multiply it by itself four times:
(2i√x)^4 = (2i√x)(2i√x)(2i√x)(2i√x)
Simplifying this expression, we get:
(2i√x)(2i√x)(2i√x)(2i√x) = -16x²
Therefore, the result of the expression radical(-4x)^4 is -16x² in the context of complex numbers.
for similar questions on radical
https://brainly.com/question/29975467
#SPJ11
For sample of 29 New England cities sociologist studies the crime rate in each city (crimes per 100,000 residents) as function of its poverty rate (in %) and its median income (in Si,0OOs): He finds that SSE = 4,166,091 and SST = 7,712,159. a. Calculate the standard error of the estimate: (Round your answer to 4 decimal places ) Standard Error This is a numeric cell, s0 please enter numbers only: b-1. What proportion of the sample variation in crime rate is explained by the variability in the explanatory variables? (Round your answer to 4 decimal places:) Explained proportion b-2. What proportion is unexplained? (Round your answer to decimal places ) Unexplained proportion
a. standard error = √(4,166,091/27) = 888.56 (rounded to 4 decimal places), b-1. 46.06% of the sample variation in crime rate is explained by the poverty and median income variability, and b-2. Therefore, 53.94% of the sample variation in crime rate is unexplained.
a. To calculate the standard error of the estimate, we first need to calculate the degrees of freedom, which is n-2, where n is the sample size. In this case, n=29, the degree of freedom is 27. Then, we can use the formula:
standard error = √(SSE/df)
Plugging in the values we have, we get:
standard error = √(4,166,091/27) = 888.56 (rounded to 4 decimal places)
b-1. To find the proportion of sample variation in the crime rate that is explained by the variability in the explanatory variables, we can use the formula:
R-squared = 1 - (SSE/SST)
Plugging in the values we have, we get:
R-squared = 1 - (4,166,091/7,712,159) = 0.4606 (rounded to 4 decimal places)
Therefore, 46.06% of the sample variation in crime rate is explained by the variability in the poverty rate and median income.
b-2. To find the proportion of sample variation in the crime rate that is unexplained, we can simply subtract the explained proportion (R-squared) from 1:
Unexplained proportion = 1 - 0.4606 = 0.5394 (rounded to 4 decimal places)
Therefore, 53.94% of the sample variation in crime rate is unexplained.
Learn more about sample variation here:
https://brainly.com/question/31499327
#SPJ11
find the exact value of the expression, if it is defined. (if an answer is undefined, enter undefined.) tan−1 tan 6
The exact value of the expression, if it is defined for tan−1 tan 6 = tan 6 = 6 radians.
To discover the exact fee of the expression tan (tan 6), we want to understand the homes of inverse tangent and tangent features and their courting.
The tangent characteristic (tan^(-1) x) relates the ratio of the sine and cosine of an angle. It has a periodicity of π radians, this means that its values repeat after every π radians. In other phrases, tan (x + nπ) = tan x, in which n is an integer.
The inverse tangent characteristic (tan^(-1) x), also known as arctan or atan, is the inverse of the tangent function. It takes a ratio as input and returns the perspective whose tangent is that ratio.
Now, allow's to analyze the expression tan^(-1) (tan 6). Since 6 radians is inside the first duration of the tangent characteristic (0 to π radians), tan 6 is defined and falls within the variety of values for which the inverse tangent function is described.
Since tan^(-1) (tan 6) is the inverse of the tangent function carried out to the value of tan 6, we will count on the expression to simplify to the unique enter attitude, that's 6 radians.
To know more about trigonometry,
https://brainly.com/question/29766029
#SPJ1
(q19) Which is an even function?
The even function in the context of this problem is given as follows:
A. [tex]f(x) = -x^4[/tex]
What are even and odd functions?In even functions, we have that the statement f(x) = f(-x) is true for all values of x.In odd functions, we have that the statement f(-x) = -f(x) is true for all values of x.If none of the above statements are true for all values of x, the function is neither even nor odd.The fourth power function has the same output values for x and -x, meaning that:
[tex]-x^4 = -(-x)^4[/tex]
Hence option A gives the even function in the context of this problem.
More can be learned about odd and even functions at https://brainly.com/question/2284364
#SPJ1
suppose that integral of (f(x) dx) from (3) to (4)= -4. find integral of (9 f(u) du) from (3) to (4)and integral of (- f(u) du) from (3) to (4)
The definite integral of -f(u) from 3 to 4 is 4.
Since we know the definite integral of f(x) from 3 to 4 is -4, we can use the following formula to find the definite integral of 9f(u) from 3 to 4:
∫[3 to 4] 9f(u) du = 9 ∫[3 to 4] f(u) du
This is because we can factor the constant 9 outside of the integral, and we're left with the integral of f(u) from 3 to 4.
So, we can substitute -4 for the integral of f(x) from 3 to 4:
∫[3 to 4] 9f(u) du = 9(-4) = -36
Therefore, the definite integral of 9f(u) from 3 to 4 is -36.
Now, let's find the definite integral of -f(u) from 3 to 4. We can use a similar method:
∫[3 to 4] -f(u) du = -∫[3 to 4] f(u) du
This is because we can factor out the constant -1, which changes the sign of the integral. So, we can substitute -4 for the integral of f(x) from 3 to 4:
∫[3 to 4] -f(u) du = -(-4) = 4
Therefore, the definite integral of -f(u) from 3 to 4 is 4.
Know more about the definite integral here:
https://brainly.com/question/27746495
#SPJ11
Consider the basis b of mathbb r^2 consisting of vectors left begin array c 1 cr 1 end array right mbox and left begin array c 6 cr 6 end array right find vec x in mathbb r 2 whose coordinate vector relative to the basis b is vec x b left begin array c 6 cr 1 end array right
The condition that ensures a solution for the mentioned equation is :
1. b₂ = 2b₁ and 6b₁-3b₃ +b₄ = 0.
In mathematics, an equation is a formula that connects two expressions with the equal sign = to indicate that they are equal. An equation consists of two expressions joined by an equal sign ("="). Expressions for both sides of the equals sign are called the "left side" and the "right side" of the equation. Usually the right side of the equation is assumed to be zero. If this is accepted, it does not reduce the generality, since it can be done by subtracting the right side from the two sides.
According to the Question:
Given that:
x₁+ 2x₂= b₁ ------------------------- (1)
2x₁ + 4x₂ = b₂ ------------------------- (2)
3x₁ + 7x₂ = b₃ ------------------------ (3)
3x₁ + 9x₂ = b₄ ------------------------ (4)
From equation (1) and (2), we get:
b₂ = 2b₁
After analysis equation (1), we have:
6b₁-3b₃ +b₄ = 0
Using equation (1), (3) and (4), we get:
3(x₁+2x₂) -6(3x₁+7x₂) + 3x₁ + 9x₂ ≠ 0
Putting the value from equation (1),(3) and (4), we get:
6(x₁+2x₂) -3(3x₁+7x₂) + 3x₁ + 9x₂ = 0
Hence option (1) is correct.
Learn more about Equation:
brainly.com/question/29538993
#SPJ1
Complete Question:
Consider the following system of linear equations:
x₁+ 2x₂= b₁
2x₁ + 4x₂ = b₂
3x₁ + 7x₂ = b₃
3x₁ + 9x₂ = b₄
which one of the following conditions ensures that a solution exists for the above system.
1. b₂ = 2b₁ and 6b₁-3b₃ +b₄ = 0
2. b₃ = 2b₁ and 6b₁-3b₃ +b₄ = 0
3. b₂ = 2b₁ and 3b₁-6b₃ +b₄ = 0
4. b₃ = 2b₁ and 3b₁-6b₃ +b₄ = 0
Find the angle between V and w V=-5+8j, w=4i+12j
Therefore, the angle between V and w is approximately 75.97 degrees.
To find the angle between V and w, we can use the dot product formula:
V · w = |V| |w| cosθ
where θ is the angle between the two vectors, and |V| and |w| are the magnitudes of the vectors.
First, let's calculate the dot product:
V · w = (-5)(4) + (8)(12)
= 61
Next, let's calculate the magnitudes:
|V| = √((-5)^2 + 8^2)
= √89
|w| = √(4^2 + 12^2)
= 4√5
Now we can solve for cosθ:
cosθ = (V · w) / (|V| |w|)
= 61 / (4√5 √89)
≈ 0.2577
Finally, we can find the angle θ:
θ = cos^(-1)(0.2577)
≈ 75.97°
To know more about angle,
https://brainly.com/question/31911844
#SPJ11
the empty set is not a vector space. it fails to satisfy only one of the requirements from the definition. which one?
since there are no elements in the empty set that can serve as a zero vector. The empty set has no elements, so it cannot have a zero vector, and thus it cannot be a vector space.
The empty set fails to satisfy the requirement that there exists a zero vector, since there are no elements in the empty set that can serve as a zero vector. Therefore, the empty set cannot be considered a vector space.
The empty set is not a vector space because it fails to satisfy the requirement of having a zero vector. A vector space must have a zero vector (also known as the identity element) that, when added to any other vector in the space, results in the original vector. The empty set has no elements, so it cannot have a zero vector, and thus it cannot be a vector space.
learn more about elements here: https://brainly.com/question/25757392
#SPJ11
PELEASE HELP!!/PORFAVOR AYUDA!! 50 POINTS!!/50 PUNTOS!!
(a) What is the value of x?.Show ALL of your work!
(b) What is the measure of angle B? Show ALL your work.
Answer is
Step-by-step explanation:
Find the largest and the smallest value of the expression 2sin^2θ - 3cos^2θ
The largest value of 2sin^2θ - 3cos^2θ is 2, which occurs when θ=π/4+nπ, where n is an integer. The smallest value is -3, which occurs when θ=3π/4+nπ.
To find the maximum and minimum values, we can use the identity sin^2θ + cos^2θ = 1. We can rewrite 2sin^2θ - 3cos^2θ as 2(1 - cos^2θ) - 3cos^2θ, which simplifies to -cos^2θ + 2. To find the maximum value, we want to minimize the negative term, so we set cos^2θ = 0, which occurs when θ=π/2+nπ.
Plugging this into the expression gives us 2 as the maximum value. To find the minimum value, we want to maximize the negative term, so we set cos^2θ = 1, which occurs when θ=0+nπ. Plugging this into the expression gives us -3 as the minimum value.
To learn more about expressions click here :
brainly.com/question/29052576?
#SPJ11
The largest value of 2sin^2θ - 3cos^2θ is 2, which occurs when θ=π/4+nπ, where n is an integer. The smallest value is -3, which occurs when θ=3π/4+nπ.
To find the maximum and minimum values, we can use the identity sin^2θ + cos^2θ = 1. We can rewrite 2sin^2θ - 3cos^2θ as 2(1 - cos^2θ) - 3cos^2θ, which simplifies to -cos^2θ + 2. To find the maximum value, we want to minimize the negative term, so we set cos^2θ = 0, which occurs when θ=π/2+nπ.
Plugging this into the expression gives us 2 as the maximum value. To find the minimum value, we want to maximize the negative term, so we set cos^2θ = 1, which occurs when θ=0+nπ. Plugging this into the expression gives us -3 as the minimum value.
To learn more about expressions click here :
brainly.com/question/29052576?
#SPJ11
Vector vector u equals vector PQ has initial point P (2, 14) and terminal point Q (7, 3). Vector vector v equals vector RS has initial point R (29, 8) and terminal point S (12, 17). Part A: Write u and v in linear form. Show all necessary work. (4 points) Part B: Write u and v in trigonometric form. Show all necessary work. (8 points) Part C: Find 7u − 4v. Show all necessary calculations. (3 points)
The vectors presented in linear form using the coordinates of the points on the vectors are;
Part A; [tex]\vec{u}[/tex] = <5, -11>, [tex]\vec{v}[/tex] = <-17, 9>
Part B; [tex]\vec{u}[/tex] = 12.08·(cos(-65.56°), sin(-65.56°)), [tex]\vec{v}[/tex] = 19.24·9cos(-27.9°), cos(-27.9°)
Part C; 7·u - 4·v = <33, -41>
What is a vector?A vector is a quantity that has both magnitude and direction.
Part A;
The initial point of the vector u is; P(2, 14), and the final point of the vector u is Q(7, 3)
The vector u in linear form is therefore; [tex]\vec{u}[/tex] = <7 - 2, 3 - 14> = <5, -11>
The initial point of the vector v is; R(29, 8), and the final point of the vector u is S(12, 17)
The vector v in linear form is therefore; [tex]\vec{v}[/tex] = <12 - 29, 17 - 8> = <-17, 9>
Part B
Pythagorean Theorem indicates;
Magnitude of the vector u, |u| = √(5² + (-11)²) ≈ 12.08
The direction of the vector u is; arctan(-11/5) ≈ -65.56°
The vector in trigonometric form is therefore; [tex]\vec{u}[/tex] = 12.08 × (cos(-65.56°), sin(-65.56°)
Magnitude of the vector v, |v| = √((-17)² + 9²) ≈ 19.24
The direction of the vector v is; arctan(9/(-17)) ≈ -27.9°
The vector in trigonometric form is therefore; [tex]\vec{v}[/tex] = 19.24 × (cos(-27.9°), sin(-27.9°))
Part C;
7·u = <7 × 5, 7 × (-11)> = <35, -77>
-4·v = <(-4) × (-17), (-4) × 9> = <68, -36>
7·u - 4·v = <35 - 68, -77 - (-36)> = <33, -41>
Learn more on vectors here: https://brainly.com/question/28931875
#SPJ1
in order to estimate the difference between the average hourly wages of employees of two branches of a department store, the following data have been gathered. downtown store north mall store sample size 25 20 sample mean $11 $6 sample standard deviation $4 $1 the point estimate for the difference between the two population means is 5. find a 95% interval estimate for the difference between the two population means.
The estimate for the difference between the two population mean for 95% confidence interval is given by ( 3, 7 ).
The 95% interval estimate for the difference between the two population means,
Use the two-sample t-interval formula,
( X₁ - X₂ ) ± tα/2 × SE
where X₁ and X₂ are the sample means of the two branches,
tα/2 is the critical value of the t-distribution with degrees of freedom equal to the smaller of (n₁ - 1) and (n₂ - 1).
And α/2 = 0.025 for a two-tailed test at the 95% confidence level,
And SE is the standard error of the difference between the means, given by,
SE = √(s₁²/n₁ + s₂²/n₂)
Plugging in the given values, we get,
= ( 11 - 6 ) ± t0.025 × √(4²/25 + 1²/20)
Simplifying ,
5 ± t0.025 × 0.83
Using a t-table with 43 degrees of freedom the smaller of 25-1 and 20-1, find the critical value t0.025 = 2.017.
using calculator ( attached value)
Plugging this in, we get,
5 ± 2.017 × 0.83
So the 95% confidence interval for the difference between the two population means is (3.33, 6.67)
Nearest whole number = ( 3, 7 )
Therefore, 95% confidence interval that the true difference between the average hourly wages of employees of the downtown store and the north mall store is between 3 and 7.
learn more about confidence interval here
brainly.com/question/16258448
#SPJ4
HELP ME PLSSSSS THIS IS MY MISSING ASSIGNMENT
Answer:10
Step-by-step explanation:
10
square root of 100 is 10 because 10×10=100
Find the quadratic equation!
The quadratic equation on the given graph is y = (x - 2)² - 9.
How to find the quadratic equation?For a quadratic with leading coefficient a and vertex (h, k), the equation is:
y = a*(x - h)² + k
Here we can see that the vertex is at (2, -9), replacing that:
y = a*(x - 2)² - 9
We can see that the y-intercept is at y = -5, then:
-5 = a*(0 - 2)² - 9
-5 = a*4 - 9
-5 + 9 = a*4
4 = a*4
4/4 = a
1 = a
The quadratic is:
y = (x - 2)² - 9
Learn more about quadratic equations at:
https://brainly.com/question/1214333
#SPJ1
If a signal Q is defined as 'signal Q: STD_LOGIC_VECTOR(2 to 8):="1001011";' what vector is returned from Q(5 to 6)? (5 points) a. "10" b. "01" c. "00" d. "11" e. None of the above
The vector returned from Q(5 to 6) is "01".
In the given signal definition, "signal Q: STD_LOGIC_VECTOR(2 to 8):=""1001011"";", the range of indices from 2 to 8 specifies a 7-bit STD_LOGIC_VECTOR with the value "1001011". When accessing a range of indices within this vector, we use the syntax Q(m to n), where m and n are the starting and ending indices of the desired range, respectively.
Therefore, when we access Q(5 to 6), we are retrieving the 5th and 6th elements of the vector, which correspond to the values "01". Thus, the vector returned from Q(5 to 6) is "01". Option (b) is the correct answer.
To learn more about STD_LOGIC_VECTOR click here: brainly.com/question/31392056
#SPJ11
find the indefinite integral and check the result by differentiating. ∫2xx2 47dx
The indefinite integral of 2x^2/47dx is (2/47)∫x^2dx which equals (2/47)(x^3/3) + C, where C is the constant of integration. To check this result, we can differentiate the obtained expression using the power rule of differentiation. The derivative of (2/47)(x^3/3) is (2/47)(3x^2/3) which simplifies to (2/47)x^2, which is the integrand we started with. Therefore, the obtained result is correct.
In summary, the indefinite integral of 2x^2/47dx is (2/47)(x^3/3) + C, where C is the constant of integration. We can check this result by taking the derivative of the obtained expression and verifying that it equals the original integrand.
Learn more about indefinite integral here: brainly.com/question/17283810
#SPJ11
find the area of the surface obtained by rotating the curve y=1 3x2 y=1 3x2 from x=0x=0 to x=4x=4 about the yy-axis.
The surface obtained by rotating the curve y=1/3x^2 from x=0 to x=4 about the y-axis can be found by using the formula for the surface area of a solid of revolution: S = 2π∫a^b f(x)√(1 + [f'(x)]^2) dx.
In this case, f(x) = 1/3x^2, so f'(x) = 2/3x. Substituting these into the formula, we get S = 2π∫0^4 (1/3x^2)√(1 + (2/3x)^2) dx. Evaluating this integral, we get S = (16/3)π(√13 - 1). Therefore, the area of the surface is (16/3)π(√13 - 1). To find the surface area, we first need to express the equation of the surface in terms of a function of x, since we are rotating the curve about the y-axis. To do this, we solve the equation y = 1/3x^2 for x in terms of y: x = √(3y). Next, we use the formula for the surface area of a solid of revolution, which involves integrating the function √(1 + [f'(x)]^2) over the interval of rotation. In this case, f(x) = 1/3x^2 and f'(x) = 2/3x. Substituting these into the formula and integrating over the interval x=0 to x=4, we get the formula S = 2π∫0^4 (1/3x^2)√(1 + (2/3x)^2) dx. Evaluating this integral, we get S = (16/3)π(√13 - 1), which is the surface area of the solid of revolution.
Learn more about interval of rotation here: brainly.com/question/15049949
#SPJ11
Find the function f(x) = (x^2 - 2)(x^2 - √2) find the value(s) of x in which f’(x) = 0. to the hundredths place.
The value(s) of x in which f’(x) = 0 are x = 0 and [tex]x= ^+_-\sqrt{2+\sqrt2}[/tex] to the hundredth place.
First we need to find the derivative of f(x) for that we can use the product rule:
we know that [tex]f(x) = (x^2 - 2)(x^2 - \sqrt2)[/tex] so the first derivative f'(x) is equal to:
[tex]f'(x) = [(x^2 - 2)(2x)] + [(x^2 - \sqrt2)(2x)][/tex]
after simplifying the derivative further, we get:
[tex]f'(x) = 2x(x^2 - \sqrt2 - 2)[/tex]
We need to find the value of x for which the function f(x) =0:
So we can set f'(x) to zero and solve for x to find what is the value of x that satisfies the given equation.
[tex]2x(x^2 - \sqrt2 - 2) = 0[/tex]
Therefore, either 2x = 0 (i.e., x = 0) or [tex]x^2 - \sqrt2 - 2[/tex] = 0.
To solve for x in the second equation we can add 2 and [tex]\sqrt2[/tex] to both sides and then take the square root of both sides:
[tex]x^2 = 2 + \sqrt2\\x = ^+_- \sqrt{2 + \sqrt2}[/tex]
Therefore, the value(s) of x in which f’(x) = 0 are x = 0 and [tex]x= ^+_-\sqrt{2+\sqrt2}[/tex] to the hundredth place.
Learn more about derivatives at:
https://brainly.com/question/28376218
#SPJ1
i need help bad please
Answer:
(1.5, 4), (2, 0.25)
Step-by-step explanation:
The question wants you to select the plotted points that are not within the group and wants them as an ordered pair. So we are going to type them in (x, y) format. The x-axis is the number of pounds and the y-axis is the price ($). Each tick on the x-axis seems to increase by 0.1 lbs. Each tick on the y-axis seems to increase by $0.25.
I see two pink spots that have ventured away from the rest of the crop (pun intended). The top spot is at 1.5 pounds and a cost of $4.00. This ordered pair would then be (1.5, 4). The bottom spot is at 2 pounds and a cost of $0.25. This ordered pair would then be (2, 0.25).
So in that box you are going to type: (1.5, 4), (2, 0.25)
If the program you are using has any rules about trailing zeros, make sure to follow those, because your answer could also technically be: (1.5, 4.00), (2, 0.25)
Chris rented a truck for one day. There was a base fee of $15.99 , and there was an additional charge of 77 cents for each mile driven. Chris had to pay $234.67 when he returned the truck. For how many miles did he drive the truck?
Answer:
Chris drove the truck for 284 miles.
Step-by-step explanation:
Let us assume the total number of miles driven by Chris be [tex]x[/tex]. Now, as per the question, we can say that the sum of the base fee and the additional charge for each mile will be equal to the total rent that Chris will have to pay when he returns the truck. Next, we know that 1 cent = [tex]1/100[/tex] $. So, we have,
77 cents = 0.77 $
So, we can say that,
⇒[tex]15.99+0.77x=234.67[/tex]
⇒[tex]0.77x=234.67-15.99[/tex]
⇒[tex]0.77x=218.68[/tex]
⇒[tex]x=218.68/0.77[/tex]
⇒[tex]x=284[/tex]
Hence, Chris drove for a total of 284 miles when he returned the truck.