Answer:
b>a
Step-by-step explanation:
correct just divide then subtract
an 8 foot chain weighs 120 pounds. a large robot is holding one end of the chain 3 feet above the ground, so that 5 feet of the chain are on the ground. how much work must the robot do to lift this end of the chain from a height of 3 feet to a height of 13 feet (so he lifts up 10 feet)
The robot must do 840 foot-pounds of work to lift the chain from a height of 3 feet to a height of 13 feet. What the robot has to do to lift the chain from a height of 3 feet to a height of 13 feet is the work.
Work is defined as the product of the force acting on an object and the distance that object moves as a result. To compute the work that the robot must do to lift the chain from a height of 3 feet to a height of 13 feet, we must first determine how much gravitational potential energy the chain has at the higher elevation. The gravitational potential energy of an object is equal to the object's weight times its height above a reference level. The weight of the chain is given as 120 pounds, and the chain will be lifted by the robot for a total of 10 feet. After that, we can determine the amount of work that the robot must do to raise the chain to the new height using the formula W = Fd, where W is work, F is force, and d is distance. The robot must do 840 foot-pounds of work.
Know more about work here:
https://brainly.com/question/14813637
#SPJ11
Can someone please explain what Multiplying Monomials and Binomials is like a summary please quick
Answer:
quite simple
Step-by-step explanation:
When multiplying a monomial by a monomial, multiply the coefficients and then multiply the variables. When multiplying variables that are the same, use the product of powers property to add the exponents. When multiplying a monomial by a binomial, multiply the factors of the monomial into each term of the binomial.
Pls helpppp I’m stuck and no one knows
Answer:
x=9
Step-by-step explanation:
Solve the system of equations using Gauss-Jordan elimination.
x-4y+z=0
2x+2y-z=-4
|x-2y-z=-5
To solve the system of equations using Gauss-Jordan elimination, we'll start by writing the augmented matrix for the system. The augmented matrix is formed by combining the coefficients of the variables and the constant terms on the right side of each equation:
[1 -4 1 | 0]
[2 2 -1 | -4]
[1 -2 -1 | -5]
Now, we'll apply row operations to transform the augmented matrix into reduced row-echelon form.
Let's perform row 2 - 2 * row 1 to eliminate the x term in the second row:
[1 -4 1 | 0]
[0 10 -3 | -4]
[1 -2 -1 | -5]
Next, perform row 3 - row 1 to eliminate the x term in the third row:
[1 -4 1 | 0]
[0 10 -3 | -4]
[0 2 -2 | -5]
To make the second element of the third row equal to zero, perform row 3 - (1/5) * row 2:
[1 -4 1 | 0]
[0 10 -3 | -4]
[0 0 -1 | -3/5]
We can multiply the third row by -1 to make the leading coefficient in the third row positive:
[1 -4 1 | 0]
[0 10 -3 | -4]
[0 0 1 | 3/5]
Now, let's perform row 2 - 3 * row 3 to eliminate the z term in the second row:
[1 -4 1 | 0]
[0 10 0 | -19/5]
[0 0 1 | 3/5]
Next, perform row 1 + 4 * row 3 to eliminate the z term in the first row:
[1 -4 0 | 12/5]
[0 10 0 | -19/5]
[0 0 1 | 3/5]
Finally, divide the second row by 10 and simplify:
[1 -4 0 | 12/5]
[0 1 0 | -19/50]
[0 0 1 | 3/5]
Divide the first row by -4 and simplify:
[-1/4 1 0 | -3/5]
[0 1 0 | -19/50]
[0 0 1 | 3/5]
The resulting matrix corresponds to the system:
-1/4x + y = -3/5
y = -19/50
z = 3/5
Therefore, the solution to the system of equations is:
x = -3/10
y = -19/50
z = 3/5
Evaluate the expression for the given value.
2w+2l, when w=7, l=5
Answer:
2w+2l.
2(7)+2(5).
14+10.
24.
the bakers at a bakery can make 160 bagels in 4 hours. how many bagels can they bake in 6 hours? what is the rate per hour
Answer: they can make 240 bagels in 6 hours and the rate per hour is 40
Step-by-step explanation:
what is 11309.73 to the nearest hundredth
*Will award brainliest* Karla would like to lease a car worth $23,550 for a three-year period. The leasing company told Karla that after three years, the car would have a residual value of $14,136. What percentage represents the residual value of Karla’s leased car?
plz answer fast today
Answer:
5 + 5 + 3 × 7
Step-by-step explanation:
Correct me if I'm wrong.
If the volume of the following cone is 640 feet³, what is the
length of the radius? Use 3.14 for and round the answer to
the nearest hundredth.
h=12 feet
The radius is
7
feet.
The length of the radius of the cone is approximately [tex]6.74[/tex] feet.
To find the length of the radius of the cone, we can use the formula for the volume of a cone:
[tex]\[\text{{Volume}} = \frac{1}{3} \pi r^2 h\][/tex]
The concept used to find the length of the radius is the formula for the volume of a cone.
Given that the volume is [tex]640[/tex] ft³ and the height (h) is [tex]12[/tex] ft, we can substitute these values into the formula:
[tex]\[640 = \frac{1}{3} \times 3.14 \times r^2 \times 12\][/tex]
Simplifying the equation:
[tex]\[\frac{640}{12 \times \frac{1}{3} \times 3.14} = r^2\]\[r^2 = \frac{640}{12 \times \frac{1}{3} \times 3.14}\]\[r^2 \approx 45.45\][/tex]
Taking the square root of both sides, we find:
[tex]\[r \approx \sqrt{45.45} \approx 6.74\][/tex]
Rounding the answer to the nearest hundredth, the length of the radius is approximately [tex]6.74[/tex] feet.
In conclusion, the length of the radius of the given cone, with a volume of [tex]640[/tex] ft³ and a height of [tex]12[/tex] feet, is approximately [tex]6.74[/tex] feet (rounded to the nearest hundredth).
For more such questions on cone:
https://brainly.com/question/1082469
#SPJ8
Find the area of a parallelogram. If base = 15 cm; height= 5 cm
how do u turn 3 into a fraction?
Answer:
[tex]\frac{3}{1}[/tex]
Step-by-step explanation:
Put a 1 under it.
Find sin(a) in the triangle.
Choose 1 answer:
Answer:
sin B sorryonlearningAAAAAA help me pls
(I need help on number 5)
Answer:
1620!
Step-by-step explanation:
Answer:
1620
Step-by-step explanation:
help pls and thank uu:)
Answer and Step-by-step explanation:
The answer is 1.
When g(x) is 0, we need to add 4 to both sides, then divide each side by 4 to get the x by itself. We see that x is equal to 1.
0 = 4x - 4
4 = 4x
x = 1
#teamtrees #PAW (Plant And Water)
Karen wants to advertise how many chocolate chips (in grams) are in each Big Chip cookie at her bakery. She randomly selects a sample of 13 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 60.3 and a standard deviation of 37.5. What is the 98% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? O 32.4<< 88.2 O 12.4 < x < 108.2 46.5< < 74.1 21.5<<99.1 O 15.3<< 105.3
The 98% confidence interval for the number of chocolate chips per cookie for Big Chip cookies is approximately 32.4<< 88.2
How to construct a confidence interval for the mean number of chocolate chips per cookie?To construct a confidence interval for the mean number of chocolate chips per cookie, we can use the t-distribution since the sample size is small (n = 13) and the population standard deviation is unknown.
Given that the sample mean is 60.3 and the sample standard deviation is 37.5, we can calculate the standard error (SE) as:
[tex]SE = s / \sqrt(n)[/tex]
where s is the sample standard deviation and n is the sample size.
[tex]SE = 37.5 / \sqrt(13) \approx 10.41[/tex]
To calculate the margin of error, we multiply the standard error by the t-score corresponding to a 98% confidence level with n-1 degrees of freedom.
With n-1 = 12 degrees of freedom, the t-score can be obtained from a t-table or calculator. For a 98% confidence level, the t-score is approximately 2.681.
Margin of Error = t * SE = 2.681 * 10.41 ≈ 27.92
Finally, we can construct the confidence interval by subtracting and adding the margin of error to the sample mean:
CI = sample mean ± margin of error
CI = 60.3 ± 27.92
Therefore, among the answer choices provided, the closest option is "32.4 << 88.2."
Learn more about confidence interval
brainly.com/question/31736191
#SPJ11
Create a function where the domain is not a set of numbers and the range would be the set of whole numbers (1, 2, 3). For the theme of the function, use breakfast. Make sure to clearly identify the domain and the function.
After considering the given data we conclude that the creation of a satisfactory function with respect to the dedicated question is possible.
To make a function where the domain is not a set of numbers and the range would be the set of whole numbers (1, 2, 3) and the theme of the function is breakfast, we can describe a function that takes in breakfast items as inputs and assigns a number from 1 to 3 to each item as outputs.
The domain of the function will be the set of breakfast items, and the range would be the set of whole numbers (1, 2, 3).
Here is an instance of such a function:
Function name: breakfastRanking
Domain: {pancakes, waffles, eggs, bacon, sausage, toast, bagel, cereal, oatmeal}
Range: {1, 2, 3}
Function definition:
breakfastRanking(pancakes) = 1
breakfastRanking(waffles) = 2
breakfastRanking(eggs) = 3
breakfastRanking(bacon) = 1
breakfastRanking(sausage) = 2
breakfastRanking(toast) = 3
breakfastRanking(bagel) = 1
breakfastRanking(cereal) = 2
breakfastRanking(oatmeal) = 3
For the function, we have assigned a ranking of 1, 2, or 3 to each breakfast item based on personal preference.
For instance , pancakes, bacon, and bagel are assigned a ranking of 1 because they are the favorite breakfast items, while waffles, sausage, and cereal are assigned a ranking of 2, and eggs, toast, and oatmeal are assigned a ranking of 3.
This function can be imperatives for deciding what to have for breakfast based on personal preference.
To learn more about domain
https://brainly.com/question/26098895
#SPJ4
PVHS published a confidence interval for the true proportion of high schoolers who show up late for school on a given day. The interval created from a random sample of high schoolers is (0.039, 0.109). A. What is the point estimate? (1 pt) B. What margin of error is used in this interval?
Given, PVHS published a confidence interval for the true proportion of high schoolers who show up late for school on a given day.
The interval created from a random sample of high schoolers is (0.039, 0.109). We have to determine the point estimate and margin of error for this interval. (1 pt) A. We know that Point estimate is the single value that best represents the population of interest. It can be calculated as the average of all the sample observations.
For the given interval, the point estimate is given by the average of the interval which is:(0.039 + 0.109) / 2 = 0.074B. What margin of error is used in this interval?Margin of Error = (Upper limit of CI - Point Estimate) or (Point Estimate - Lower limit of CI)
For the given interval, we have Point estimate = 0.074Lower limit of CI = 0.039Upper limit of CI = 0.109
Therefore, Margin of Error = (0.109 - 0.074) = 0.035
Thus, the margin of error used in this interval is 0.035.
To know more about average refer to:
https://brainly.com/question/130657
#SPJ11
1. find the surface area 3 ft 4 ft 10 ft Your answer
Answer:
Surface area is 164 ft^2.
Step-by-step explanation:
2(10*4) + 2(10*3) + 2(4*3) = 164 ft^2
A line that a graph approaches but does not reach. It may be a vertical, horizontal, or slanted line.
first two letters as
Answer:
asymptote
Step-by-step explanation:
The variable b varies directly as the square root of a. If b=100 when c=4, which equation can be used to find other combinations of b and c ?
The equation that can be used to find other combinations of b and c is: b = k√a, where k is a constant of variation.
When a variable, such as b, varies directly with the square root of another variable, such as a, it means that there is a constant of proportionality such that the ratio between b and the square root of a remains constant.
In this case, we are given that b = 100 when c = 4. To find the equation that represents the relationship between b and c, we can set up a proportion using the given information:
b / sqrt(a) = k
Substituting the values b = 100 and c = 4:
100 / sqrt(4) = k
Simplifying:
100 / 2 = k
k = 50
Now we can rewrite the equation as:
b / sqrt(a) = 50
To find other combinations of b and c, we can rearrange the equation to solve for b:
b = 50 * sqrt(a)
Therefore, the equation that can be used to find other combinations of b and c is:
b = 50 * sqrt(a)
This equation states that b is equal to 50 times the square root of a. By plugging in different values for a, we can determine the corresponding values of b.
Know more about Plugging here:
https://brainly.com/question/13137385
#SPJ11
please help i’ll give brainliest
Answer:
An animal that eats dead animals or plants.
Step-by-step explanation:
Its lowkey the defintion lol
The mean age at first marriage for respondents in a survey is 23.33, with a standard deviation of 6.13 a. Calculate the Z score associated with an observed age at first marriage of 25.50 and explain what the Z score tells you. b. Calculate the observed age at first marriage associated with a Z score of -0.72. c. What proportion of respondents were married for the first time between the ages of 20 and 30 ? d. If an individual was married for the first time at the age of 35, what percentile is he or she in?
In summary, using Z scores and a Z table, we can find that approximately 51% of respondents were married for the first time between the ages of 20 and 30, and an individual married for the first time at the age of 35 is in approximately the 97th percentile.
(a) To calculate the Z score for an observed age of 25.50, we use the formula Z = (X - μ) / σ, where X is the observed value, μ is the mean, and σ is the standard deviation. Substituting the given values, we get Z = (25.50 - 23.33) / 6.13 ≈ 0.36. The Z score tells us that the observed age is approximately 0.36 standard deviations above the mean. (b) To find the observed age associated with a Z score of -0.72, we rearrange the formula and solve for X: X = Z * σ + μ. Substituting the values, we get X = -0.72 * 6.13 + 23.33 ≈ 20.95. Thus, an observed age of approximately 20.95 corresponds to a Z score of -0.72.
(c) To calculate the proportion of respondents married between the ages of 20 and 30, we need to convert the age range to Z scores. The Z score for 20 is (20 - 23.33) / 6.13 ≈ -0.54, and the Z score for 30 is (30 - 23.33) / 6.13 ≈ 1.09. We then calculate the area under the normal distribution curve between these Z scores using a Z-table or a statistical software. This proportion represents the proportion of respondents married for the first time between the ages of 20 and 30.
(d) To determine the percentile rank for an individual married at the age of 35, we need to calculate the area under the normal distribution curve to the left of the corresponding Z score. The Z score for 35 is (35 - 23.33) / 6.13 ≈ 1.90. We then look up the corresponding percentile in a Z-table or use statistical software to find the percentage of the population with a Z score less than 1.90. This percentage represents the percentile rank for an individual married at the age of 35.
To know more about Z scores here: brainly.com/question/31871890
#SPJ11
Find the sample variance and standard deviation. 17, 10, 4, 8, 11 D Choose the correct answer below. Fill in the answer box to complete your choice. (Type an integer or a decimal. Round to one decimal
The sample variance is 10 and the standard deviation is 3.2.
How to find the sample variance and standard deviation?Given data: 17, 10, 4, 8, 11
The sample size, n = 5
Mean (m) = ∑x / n
m = (17 + 10 + 4 +8 + 11)/5
m = 50/5
m = 10
x x-m (x- m)²
17 17-10 = 7 49
10 10-10 = 0 0
4 4-10 = -6 36
8 8 - 10 = -2 4
11 11 - 10 = 1 1
90
∑(x- m)² = 90
Sample variance, s² = ∑(x-x)² /(n-1)
Sample variance, s² = 90/(10 - 1)
= 90/9
= 10
Standard deviation (S) = √variance
Standard deviation (S) = √10 = 3.2
Learn more about variance and standard deviation on:
https://brainly.com/question/28383764
#SPJ1
Solve the following DE using Power series around xo = 0. Find the first eight nonzero terms of this DE. y" + xy' + 2y = 0.
The first eight nonzero terms of the solution by substituting the values of the coefficients in the power series expression for y(x) are:
[tex]a_0 = 0\\a_1 = -a_2/2\\a_2 = -3a_1/2\\a_3 = -(4a_2 + 6a_1)/2\\a_4 = -(5a_3 + 7a_2)/2\\a_5 = -(6a_4 + 8a_3)/2\\a_6 = -(7a_5 + 9a_4)/2\\a_7 = -(8a_6 + 10a_5)/2\\a_8 = -(9a_7 + 11a_6)/2[/tex]
To solve the given differential equation y" + xy' + 2y = 0 using power series method around xo = 0, we assume a power series solution of the form:
y(x) = ∑[n=0 to ∞] [tex]a_n x^n[/tex]
Now, let's find the first eight nonzero terms of this power series solution.
First, we'll calculate the derivatives of y(x) with respect to x:
y'(x) = ∑[n=0 to ∞] a_n * n * [tex]x^{(n-1)[/tex]
y''(x) = ∑[n=0 to ∞] a_n * n * (n-1) * [tex]x^{(n-2)[/tex]
Substituting these expressions into the original differential equation, we have:
∑[n=0 to ∞] [tex]a_n[/tex] * n * (n-1) * [tex]x^{(n-2)[/tex] + x * ∑[n=0 to ∞] [tex]a_n[/tex] * n * [tex]x^{(n-1)[/tex] + 2 * ∑[n=0 to ∞] [tex]a_n * x^n[/tex] = 0
Now, we'll rearrange the terms and combine them:
∑[n=2 to ∞][tex]a_n[/tex] * n * (n-1) * [tex]x^{(n-2)[/tex] + ∑[n=1 to ∞] [tex]a_n[/tex] * n * [tex]x^n[/tex] + 2 * ∑[n=0 to ∞] [tex]a_n * x^n[/tex] = 0
Let's break down each summation separately:
For the first summation term, n starts from 2:
∑[n=2 to ∞] [tex]a_n[/tex] * n * (n-1) * [tex]x^{(n-2)[/tex] = a_2 * 2 * 1 * [tex]x^0[/tex] + [tex]a_3[/tex] * 3 * 2 * x^1 + [tex]a_4[/tex] * 4 * 3 * [tex]x^2[/tex] + ...
For the second summation term, n starts from 1:
∑[n=1 to ∞] [tex]a_n[/tex] * n * [tex]x^n[/tex] = [tex]a_1[/tex] * 1 * [tex]x^1[/tex] + [tex]a_2[/tex] * 2 * [tex]x^2[/tex] + [tex]a_3[/tex] * 3 * [tex]x^3[/tex] + ...
For the third summation term, n starts from 0:
2 * ∑[n=0 to ∞] [tex]a_n * x^n[/tex] = 2 * [tex]a_0 * x^0[/tex] + 2 * [tex]a_1 * x^1[/tex] + 2 *[tex]a_2 * x^2[/tex] + ...
Combining these terms, we have:
2[tex]a_0[/tex] + (2[tex]a_1 + a_2[/tex])x + (2[tex]a_2 + 3a_1[/tex])[tex]x^2[/tex] + [tex](2a_3 + 4a_2 + 6a_1)x^3[/tex] + ...
Since the equation should hold for all values of x, each coefficient of [tex]x^n[/tex]should be zero. Therefore, we equate each coefficient to zero and find the recurrence relation for the coefficients:
2[tex]a_0[/tex] = 0 => [tex]a_0 = 0[/tex]
[tex]2a_1 + a_2 = 0[/tex] => [tex]a_1 = -a_2/2[/tex]
[tex]2a_2 + 3a_1 = 0[/tex] => [tex]a_2 = -3a_1/2[/tex]
[tex]2a_3 + 4a_2 + 6a_1 = 0[/tex]
Using these recurrence relations, we can calculate the first eight nonzero terms of the solution.
Starting from [tex]a_0 = 0[/tex], we can find the values of [tex]a_1, a_2[/tex], and so on:
[tex]a_0 = 0[/tex]
[tex]a_1 = -a_2/2[/tex]
[tex]a_2 = -3a_1/2[/tex]
[tex]a_3 = -(4a_2 + 6a_1)/2[/tex]
[tex]a_4 = -(5a_3 + 7a_2)/2[/tex]
[tex]a_5 = -(6a_4 + 8a_3)/2[/tex]
[tex]a_6 = -(7a_5 + 9a_4)/2[/tex]
[tex]a_7 = -(8a_6 + 10a_5)/2[/tex]
[tex]a_8 = -(9a_7 + 11a_6)/2[/tex]
Therefore, these are the first eight nonzero terms of the solution by substituting the values of the coefficients in the power series expression for y(x).
Learn more about Power Series at
brainly.com/question/32614100
#SPJ4
Consider the following data 6,6; -14, -14.10.6.-14 Copy Data Step 1 of 3: Determine the mean of the given data Answer how to enter your answer fopens in new window) 1 Point Tables Keypad Keyboard Shortcuts > Next < Prev + . Consider the following data 66-14-1410,6-14 Cory bola Hep 2 of 3 Determine the mean of the data
The mean of the given data, 6, 6, -14, -14, 10, 6, -14, is approximately 0.857.
To determine the mean of the given data, we need to sum up all the values and then divide the sum by the total number of values.
The given data is: 6, 6, -14, -14, 10, 6, -14.
Sum up the values:
6 + 6 + (-14) + (-14) + 10 + 6 + (-14) = 6
Divide the sum by the total number of values:
6 / 7 = 0.857
Therefore, the mean of the given data is approximately 0.857.
To learn more about mean visit : https://brainly.com/question/1136789
#SPJ11
I'll give brainliest
your options are:
a. 60
b. 120
c. 180
d. 40
Answer:
the answer is A
Step-by-step explanation:
It is an acute angle but is larger than 40
Find the slope between the two points. (2,7) and (5,8)
Answer:
1/3
Step-by-step explanation:
Plug the coordinates into the slope formula.
y2 - y1/ x2 - x1
8 - 7 / 5 - 2
= 1/3
The slope is 1/3.
find cos ∅
A. 8/17
B. 8/15
C. 15/8
D. 15/17
Answer:
I think its c hope this helps I may be wrong
It costs $1.16 to buy four-fifths a pound of apples. How much would it cost to
buy 8 pounds?
Answer:
11.60
Step-by-step explanation:
If the cost of 4/5th a pound of apples is $1.16, and we need to find the cost of that of 8 pounds, then you start by finding how many 4/5ths of a pound are in 8 pounds. 8 dividided by 0.8 (the decimal form of 4/5) is 10. Taking that 10, you would multiply the original cost of $1.16, which would bring you to the total of $11.60.