BigDecimal gives you control over how values are rounded. By default option(d) all calculations are exact and rounding occurs.
BigDecimal is a Java class that provides a way to perform exact calculations on decimal numbers with a high degree of precision and control over rounding. Unlike primitive data types, such as double and float, which are prone to rounding errors due to their binary representation, BigDecimal stores numbers using a base-10 representation, allowing for more precise calculations.
Additionally, it allows the programmer to specify rounding rules, such as rounding up or down to a certain number of decimal places, ensuring that the results of calculations are accurate and consistent. This makes BigDecimal a useful tool for applications that require precise numerical calculations, such as financial and scientific applications.
Therefore, the correct option is (d) all calculations are exact and rounding occurs
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The standard form of the equation of a circle is (x−5)2+(y−6)2=1.
What is the general form of the equation?
Responses
x2+y2+10x+12y+62=0
x squared plus y squared plus 10 x plus 12 y plus 62 equals 0
x2+y2−10x−12y+60=0
x squared plus y squared minus 10 x minus 12 y plus 60 equals 0
x2+y2−10x−12y−62=0
x squared plus y squared minus 10 x minus 12 y minus 62 equals 0
x2+y2+10x+12y+60=0
The general form of the equation is x² + y² - 10x - 12y + 60 = 0.
How find the general form of the equation of a circle?The general form of the equation of a circle is given by:
x² + y² + Cx + Dy + E = 0
Where C, D and E are constant
Given the standard form of the equation of a circle as (x−5)² + (y−6)² = 1, we can rewrite it as follow:
(x−5)² + (y−6)² = 1
(x² - 10x + 25) + (y² - 12y + 36) = 1 (Expand the brackets)
x² + y² - 10x - 12y + 25 + 36 - 1 = 0
x² + y² - 10x - 12y + 60 = 0
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Given a reduced echelon matrix in R3 onto iff for every vector b in R3, Ax = b has a solution iff every row of A has a pivot.
a. true b. false
Every vector b in R3, the equation Ax = b has a solution if every row of A has a pivot.
The statement is true.
True.
If a reduced echelon matrix in R3 is obtained by row operations from a matrix A, then the reduced echelon matrix is in row echelon form and is equivalent to the original matrix A.
If every row of A has a pivot, then every row has a leading non-zero entry in the row echelon form of A.
This means that each row of the row echelon form of A has a pivot, and so the matrix has full row rank.
The number of pivot columns in the reduced echelon matrix equals the row rank of A, which is also the same as the column rank of A.
Vector b in R3, the equation Ax = b has a solution if and only if b is a linear combination of the columns of A.
If A has full column rank, then the columns of A span the column space of A, which means that any vector in the column space can be expressed as a linear combination of the columns of A.
If every row of A has a pivot, then A has full row rank, full column rank, and the columns of A span R3.
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every day ben goes for a 5/6 mile walk and his little sister walk 3/6 mile walk after 11 days how much farther has ben walk than his sister ? between what two whole numbers does your answer lie
The response falls between 3 and 4, as a result of: 11/3 = 3.67 as Ben therefore travelled 3 to 4 miles further than his sister.
what is distance ?In geometry, the separation separating two points is determined by the length of the segment of a straight straight line linking them. In two- or two half space, this is referred to as the Euclidean distance. Distance is a crucial idea that is applied in numerous contexts in real life. For instance, distance is employed in transportation to gauge route length and determine trip times. Distance is a unit of measurement used in sports to indicate how far apart two things are or how long a race is. The measurement of distance to celestial objects is a common practise in many scientific disciplines, including astronomy.
given
Ben covers the following distance after walking 5/6 miles per day for 11 days:
11 days at 5/6 miles each day equal 55/6 miles.
Over the course of 11 days, his sister covered a total distance of:
11 days at 3/6 miles per day equal 33/6 miles.
We must take the distance between them out to determine how much farther Ben went than his sister:
22 miles from 55/6 miles to 33/6 miles.
By multiplying the numerator and denominator by 2, we may reduce the following fraction:
22/6 = 11/3
Ben therefore travelled 11.33 miles further than his sister.
The response falls between 3 and 4, as a result of: 11/3 = 3.67 as Ben therefore travelled 3 to 4 miles further than his sister.
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What is the definition LCD
Answer:
The definition of LCD is Least Common Denominator.
Step-by-step explanation:
Question 2:
LCD of 7/8 and 3/4 is 8
Question 3 :
7/8 - 3/4
7/8 - 6/8
1/8
Hope this helps :) !!
Answer:
Step-by-step explanation: First of all, the full form of LCD is "Lowest Common Denominator"
LCD is the least common denominator that can be used for all types of fractions.
For example, if we have the fractions 1/2 and 2/3, we can write:
1/2 as 2/4,3/6 or 4/8
and
2/3 as 4/6,6/9 or 8/12
Hence, the least common denominator of 1/2 and 2/3 is 6, since it is present in the denominators of all the fractions.
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23=J+68/5 solve this problem I will give you about 11 points
Answer:
PEMDAS. Division first. 68/5 is 13.6. Subtract 13.6 from 23 and the answer is 9.4. Therefore J = 9.4
Step-by-step explanation:
Which statement is true?
f 0.09>78
g 8.0×10-3>6%
h 78<8.0×10-3
j 6%<0.09
Answer:g maybe
Step-by-step explanation:
Write and solve the inequality.
six less than the product 1/4 of a number n and
is no more than 97.
The solution to the inequality is n ≤ 412.
What is inequality?An inequality is a statement that asserts that two values are not equal. An inequality can be represented using symbols such as < (less than), > (greater than), ≤ (less than or equal to), or ≥ (greater than or equal to).
According to question:The inequality can be written as:
(1/4)n - 6 ≤ 97
To solve for n, we will isolate n on one side of the inequality. First, we can add 6 to both sides:
(1/4)n ≤ 103
Then, we can multiply both sides by 4:
n ≤ 412
Therefore, the solution to the inequality is:
n ≤ 412
This means that any number less than or equal to 412 satisfies the original inequality.
For example, "x > 5" is an inequality that states that the value of x is greater than 5. The inequality "y 10" indicates that the value of y is less than or equal to 10.
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If three squares have sides that make an acute triangle, then the sum of the areas of the two small squares...
If three squares have sides that make an obtuse triangle, then the sum of the areas of the two small squares...
If three squares have sides that make a right triangle, then the sum of the areas of the two small squares...
The Pythagorean Theorem can be utilized in any situation to establish a connection between the side lengths of the squares and the sort of triangle that results.
What is the Pythagorean Theorem?Let's use the notation "a, b, and c" to indicate the three squares' side lengths, where "a" stands for the shortest side, "b" for the midpoint, and "c" for the longest side.
The area of the largest square (c), which is created by the hypotenuse of the triangle, is equal to the sum of the areas of the two smaller squares when three squares' sides form an acute triangle.
The areas of the two smaller squares (a and b) formed by the two larger squares (a and b) are equal when three squares have sides that form an obtuse triangle.
If three squares have sides that make a right triangle, then the sum of the areas of the two small squares is equal to the area of the largest square (c) formed by the hypotenuse of the right triangle.
In all cases, the Pythagorean Theorem can be used to determine the relationship between the side lengths of the squares and the type of triangle formed.
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Electric utility poles in the form of right cylinders are made out of wood that costs $25. 97 per cubic foot. Calculate the cost of a utility pole with a diameter of 1. 5 ft and a height of 45 ft. Round your answer to the nearest cent
Rounding to the nearest cent, the cost of the utility pole is $2,061.33 with a diameter of 1. 5 ft and a height of 45 ft.
To calculate the cost of a utility pole, we first need to find its volume, which is the product of its height and the cross-sectional area of its base. Since the pole is in the form of a right cylinder, the cross-sectional area of its base is a circle with radius equal to half the diameter, which is 0.75 ft. Therefore, the cross-sectional area is:
Area = πr^2 = π(0.75)^2 = 1.767 ft^2
The volume of the pole is then:
Volume = Area x Height = 1.767 x 45 = 79.515 ft^3
Finally, we can calculate the cost of the pole by multiplying its volume by the cost per cubic foot of wood:
Cost = Volume x Cost per cubic foot = 79.515 x $25.97 = $2,061.33
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brainliest+100 points
Find the entire perimeter of the entire floor
Developers determine the specifics of how to build a system in the _____ phase.
a. analysis
b. design
c. implementation
d. testing
Developers determine the specifics of how to build a system in the design phase. b
The design phase and its importance:
Define Objectives:
The design phase begins after the completion of the analysis phase, where developers have gathered and evaluated requirements.
The main objective of the design phase is to create a blueprint for the system that addresses all identified requirements.
Create Architectural Design:
During this step, developers establish the overall structure of the system, including its components, their relationships, and the interactions between them.
This architectural design provides a high-level view of the system's organization.
Design System Components:
With the architectural design in place, developers focus on designing individual components or modules of the system. They create detailed specifications, which include the functionality, inputs, outputs, and processes for each component.
Design User Interface:
The user interface design involves creating a user-friendly and efficient way for end-users to interact with the system. This can include designing screen layouts, menus, buttons, and other interface elements.
Validate Design:
The final step in the design phase is to ensure that the proposed design meets all the requirements identified during the analysis phase.
Developers may use various methods, such as reviews and simulations, to validate their design before proceeding to the implementation phase.
The design phase is a crucial part of the system development process, as it defines how the system will be built, ensuring it meets the needs of its users and the project's objectives.
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How do you solve this?
Answer:
[tex] \sqrt{ \frac{4}{49 {d}^{4} } } = \frac{2}{7 {d}^{2} } [/tex]
It cost Chile 17. 70$ to send 177 text messages. How much would it cost to send 97 text message
The total cost of sending 97 text messages is $9.70
How to find the unit cost?A unit cost is defined as the total expenditure incurred by a specific company to produce, store, and sell one unit of a specific product or service. Unit costs are also synonymous with cost of goods sold (COGS). This accounting measure also involves all of the fixed and variable costs associated with the production of a good or service.
Now, we are told that It cost Chile 17.70$ to send 177 text messages. Thus:
Unit cost of message = 17.70/177 = $0.1 per message
Thus:
Cost of 97 text messages = 97 * 0.1 = $9.7
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Write a matrix that when multiplied by any point [x/y] would have the effect of rotating the point 90 degrees counterclockwise. Also determine the algebraic effect of performing the transformation on the point A.
The result of rotating the point [-5, 2] by 90 degrees counterclockwise is the point [2, -5].
Define rotationRotation is a transformation in geometry that involves turning or spinning an object around a fixed point called the center of rotation. The center of rotation remains stationary while all the points of the object move along circular paths, at the same angle and distance from the center.
To rotate a point [x/y] counterclockwise by 90 degrees, we can use a 2x2 matrix of the form:
[ 0 -1 ]
[ 1 0 ]
To multiply this matrix by a point [x/y], we can use the following matrix multiplication:
[ 0 -1 ] [ x ] [ -y ]
[ 1 0 ] [ y ] = [ x ]
So, if we have a point [x/y] and we want to rotate it 90 degrees counterclockwise, we can multiply it by the matrix [ 0 -1 ; 1 0 ] to get the new point [-y/x].
To rotate a point 90 degrees counterclockwise using a matrix, we need to represent the point as a column matrix and then multiply it by the 2x2 rotation matrix.
Assuming that the point is [x, y] = [-5, 2], we can represent it as a column matrix:
| -5 |
| 2 |
To rotate the point counterclockwise by 90 degrees, we can use the following 2x2 rotation matrix:
| 0 -1 |
| 1 0 |
Multiplying the rotation matrix by the column matrix representing the point gives:
| 0 -1 | | -5 | | 2 |
| 1 0 | ×| 2 | = | -5 |
So the result of rotating the point [-5, 2] by 90 degrees counterclockwise is the point [2, -5].
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please be correct :/
Question 12
A recent conference had 750 people in attendance. In one exhibit room of 70 people, there were 18 teachers and 52 principals. What prediction can you make about the number of principals in attendance at the conference?
There were about 193 principals in attendance.
There were about 260 principals in attendance.
There were about 557 principals in attendance.
There were about 680 principals in attendance.
Question 13
A college cafeteria is looking for a new dessert to offer its 4,000 students. The table shows the preference of 225 students.
Ice Cream Candy Cake Pie Cookies
81 9 72 36 27
Which statement is the best prediction about the number of cookies the college will need?
The college will have about 480 students who prefer cookies.
The college will have about 640 students who prefer cookies.
The college will have about 1,280 students who prefer cookies.
The college will have about 1,440 students who prefer cookies.
Question 14
A random sample of 100 middle schoolers were asked about their favorite sport. The following data was collected from the students.
Sport Basketball Baseball Soccer Tennis
Number of Students 17 12 27 44
Which of the following graphs correctly displays the data?
histogram with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled basketball going to a value of 17, the second bar labeled baseball going to a value of 12, the third bar labeled soccer going to a value of 27, and the fourth bar labeled tennis going to a value of 44
histogram with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled baseball going to a value of 17, the second bar labeled basketball going to a value of 12, the third bar labeled tennis going to a value of 27, and the fourth bar labeled soccer going to a value of 44
bar graph with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled basketball going to a value of 17, the second bar labeled baseball going to a value of 12, the third bar labeled soccer going to a value of 27, and the fourth bar labeled tennis going to a value of 44
bar graph with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled baseball going to a value of 17, the second bar labeled basketball going to a value of 12, the third bar labeled tennis going to a value of 27, and the fourth bar labeled soccer going to a value of 44
Question 15
The line plots represent data collected on the travel times to school from two groups of 15 students.
A horizontal line starting at 0, with tick marks every two units up to 28. The line is labeled Minutes Traveled. There is one dot above 4, 6, 14, and 28. There are two dots above 10, 12, 18, and 22. There are three dots above 16. The graph is titled Bus 47 Travel Times.
A horizontal line starting at 0, with tick marks every two units up to 28. The line is labeled Minutes Traveled. There is one dot above 8, 9, 18, 20, and 22. There are two dots above 6, 10, 12, 14, and 16. The graph is titled Bus 18 Travel Times.
Compare the data and use the correct measure of center to determine which bus typically has the faster travel time. Round your answer to the nearest whole number, if necessary, and explain your answer.
Bus 18, with a median of 13
Bus 47, with a median of 16
Bus 18, with a mean of 13
Bus 47, with a mean of 16
Answer:
I already did this go check the answers on the other one
Step-by-step explanation:
Are the ratios 6:7 and 1:2 equivalent?
Answer:
No
Step-by-step explanation:
If you divide 6 by 7, it is not equal to the number you get when you divide 1 by 2, therfore making them not equavalent.
~~~Harsha~~~
Answer:
No, the are not equivalent
Step-by-step explanation:
The ratios 6:7 & 1:2 are already in their simplest form, meaning we can't simple them anymore.
6:7 ≠ 1:2
Which is more, 7,000,001 milligrams or 7 kilograms?
can yall help me with this plsss?
The vertices of a figure are given. Rotate the figure as described. Find the coordinates of the image.
E(−4, 1), F(−3, 3), G(−2, 3), H(−1, 1)
180°
about the origin
Mendel is back at it with another genetics experiment. This time he needs to partition a
rectangular garden into 4 parts by constructing three additional fences parallel to one of the
sides, in addition to fencing the perimeter. What is the minimum amount of fencing (in
meters) he will need to enclose 2500 m2?
The minimum amount of fencing Mendel will need to enclose 2500 m² = 317 meters
Let's assume that x represents the length of and y represents the width of the rectangular garden.
Using the formula for tha area of rectangle, the area of the garden would be,
A = length × width
A = xy
Here, A = 2500 m²
so, 2500 = xy
⇒ y = 2500/x
Using the formula for the perimeter of the rectangle, the perimeter of the garden would be,
P = 2x + 2y
But a rectangular garden is partitioned into 4 parts by constructing three additional fences parallel to one of the side.
So, the perimeter would be,
P = 2x + 5y
sides, in addition to fencing the perimeter.
P = 2x + 5(2500/x)
P = 2x + (12500/x)
Consider the derivative of P(x) with respect to x.
P'(x) = 2 - 12500/x²
To find the minimum value consider P'(x) = 0
2 - 12500/x² = 0
2 = 12500/x²
x² = 12500/2
x² = 6250
x = 79.05 m
and y = 2500/79.05
y = 31.63 m
So, the minimum amount of fencing would be,
P = 2x + 5y
P = 2(79.05) + 5( 31.63 )
P = 316.25 meters
P ≈ 317 meters
The minimum amount of fencing need to enclose 2500 m² = 316.25 meters
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Question
The table of values shows the height of a windmill blade from the ground over time. This can be modeled by a sinusoidal function.
The table of values is attached
Which statements are true?
Select each correct answer.
The frequency of the function is 4.
The minimum value of the function is 5.8.
The amplitude of the function is 1.5.
The period of the function is 1/4.
Answer:
the amplíetude of the function is 1.5
Step-by-step explanation:
.
What is the area of this tile?
And it isn’t 12 because I did that for the other one and got it wrong.
The area of this tile is 12 cm2.
What is area?Area is a two-dimensional measure of space, referring to the total surface area of a shape. It can be measured in terms of square units, such as square feet, meters, or kilometers. Area is an important concept in geometry and can be used to calculate the perimeter, circumference, and volume of a shape. Area calculations are also used in fields such as engineering, architecture, and construction.
Area is the size of a two-dimensional shape or the amount of space within a three-dimensional figure. It is a measure of how much space an object occupies.
The area of this tile can be calculated using the formula:
Area = Length x Width
In this case, the length of the tile is 6 cm and the width is 2 cm. Therefore, the area of the tile is 12 cm2.
To calculate the area, we multiplied the length and width of the tile. This formula is applicable to all rectangles, as the area of any rectangle is determined by multiplying the length and width.
It is important to note that the units used to measure the length and width must be the same in order to get an accurate area measurement. For example, if the length was measured in inches and the width in centimeters, then the area would be incorrect.
In conclusion, the area of this tile is 12 cm2.
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The rear windshield wiper blade on a car has a length of 8 inches. The blade is mounted on a 16 inch arm, 8
inches from the pivot point. If the wiper turns through an angle of 130 degrees, how much area is swept
clean?
blade
square inches.
The area swept clean by the wiper blade is approximately 239.3 square inches.
To find the area swept clean by the bladeWe need to find the area of the circular sector that is swept out by the blade as it rotates through an angle of 130 degrees. The radius of the circular sector is the length of the wiper arm, which is 16 inches.
The formula for the area of a circular sector is
A = (θ/360) × πr^2
Where
θ is the central angle of the sector (in degrees)r is the radius of the circle π is the constant pi (approximately 3.14)In this case, θ = 130 degrees and r = 16 inches, so we can plug these values into the formula to get:
A = (130/360) × 3.14 × (16)^2
Simplifying this expression, we get:
A ≈ 239.3 square inches
Therefore, the area swept clean by the wiper blade is approximately 239.3 square inches.
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example of definition of derivative:lim as h approaches 0f(a+h) - f(a) / hThe slope of f(x) = -3x^2 +11 at any value of x
The slope of the function f(x) = -3x^2 +11 at any value of x is given by 6x.
The definition of derivative is given by the limit as h approaches 0 of [f(a+h) - f(a)] / h,
where f(x) is a function and a is a fixed value of x.
To find the slope of the function[tex]f(x) = -3x^2 +11[/tex] at any value of x, we need to use this definition of derivative.
So, let's plug in f(x) = -3x^2 +11 and a = x into the formula.
This gives us:
lim as h approaches 0 of [tex][-3(x+h)^2 + 11 - (-3x^2 + 11)] / h[/tex]
Simplifying this expression, we get:
lim as h approaches 0 of [tex][-3x^2 - 6hx - 3h^2 + 11 + 3x^2 - 11] / h[/tex]
Combining like terms, we get:
lim as h approaches 0 of [tex][-6hx - 3h^2] / h][/tex]
Factoring out an h from the numerator, we get:
lim as h approaches 0 of [-h(6x + 3h)] / h
Canceling out the h in the numerator and denominator, we get:
lim as h approaches 0 of 6x + 3h
Now, we can plug in h = 0 to find the slope of the function at any value of x:
6x + 3(0) = 6x.
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3. (07.05 MC) An equation is shown below: 12x + 3(x - 5) = 6x + 9x - 15
Part A: Solve the equation and write the number of solutions. Show all the steps. (6 points)
Part B: Name one property you used to solve this equation. (4 points)
The equation 12x + 3(x - 5) = 6x + 9x - 15 has infinite many solutions
Solving the equationPart A:
Starting with the given equation:
12x + 3(x - 5) = 6x + 9x - 15
Simplify by distributing the 3:
12x + 3x - 15 = 6x + 9x - 15
Combine like terms on both sides:
15x - 15 = 15x - 15
Add 15 to both sides:
0 = 0
Therefore, the equation has infinite many solutions
Part B:
The property used to solve this equation is the distributive property of multiplication over addition, which states that a(b + c) = ab + ac. In this case, we used the distributive property to simplify 3(x - 5) to 3x - 15.
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Violet rents a bike in a city she is visiting. She pays an initial fee of $2.50 plus $3.75 per hour she rents the bike. Which equation can be used to find y, the total cost of renting a bike, if x represents the number of hours Violet rents the bike?
Answer: y = 3.75x + 2.50
Step-by-step explanation:
The equation that can be used to find y, the total cost of renting a bike, if x represents the number of hours Violet rents the bike is:
y = 3.75x + 2.50
Explanation:
Violet pays an initial fee of $2.50, which is a fixed cost that does not depend on the number of hours she rents the bike. Additionally, she pays $3.75 per hour she rents the bike, which is a variable cost that depends on the number of hours. Therefore, the total cost of renting a bike (y) can be expressed as the sum of the fixed cost ($2.50) and the variable cost ($3.75x), which gives the equation:
Find the area of the shaded region for each composite figure. Round your answer to the nearest tenth, if necessary.
The area of the composite figure for this problem is given as follows:
A = 90 in².
How to obtain the area of the composite figure?The area of the composite figure is given by the sum of the areas of all the parts that compose the figure.
The right triangle has a side length of 5 in and an hypotenuse of 13 units, hence the missing side is given as follows:
5² + x² = 13²
25 + x² = 169
x² = 144
x = 12.
Thus the entire base is of:
12 + 4 = 16 in.
Then the figure is composed as follows:
Rectangle of dimensions 3 in and 16 in.Right triangle of sides 12 in and 8 - 3 = 5 in.Rectangle of dimensions 4 in and 3 in.Hence the area is given as follows:
A = 3 x 16 + 0.5 x 12 x 5 + 4 x 3
A = 90 in².
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The function f given by f(x)= 3x^5 -4x^3 -3x has a relative maximum at x=a) -1b) - root 5/5c) 0d) root 5/5e) 1
The function f has a relative maximum at x = -√[(2 + sqrt(2))/5], so the answer is (b) - root 5/5.
To find the relative maximum of a function, we need to find the critical points of the function, where the derivative of the function is zero or undefined.
Let's start by finding the derivative of f(x)
f'(x) = 15x⁴ - 12x² - 3
Now, we can find the critical points by solving the equation f'(x) = 0
15x⁴ - 12x² - 3 = 0
We can factor this equation by substituting y = x²
15y² - 12y - 3 = 0
Solving for y, we get
y = (2 ± √(2))/5
Substituting back x² for y, we get
x² = (2 ± √(2))/5
Taking the square root of both sides, we get
x = ± √[(2 ± √(2))/5]
Therefore, the critical points are
x = -√[(2 + √(2))/5], √[(2 - √(2))/5]
Now, we need to determine whether these critical points are relative maximum or minimum.
We can use the second derivative test to determine the nature of the critical points. The second derivative of f(x) is
f''(x) = 60x³ - 24x
Plugging in the critical points, we get
f''(-√[(2 + √(2))/5]) = -48√(2) < 0 (relative maximum)
f''(√[(2 - √(2))/5]) = 48√(2) > 0 (relative minimum)
Therefore, the relative maximum of the function f(x) is at
x = -√[(2 + √(2))/5]
So, the correct answer is (b) - root 5/5.
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what is 6.9cm *10000000m
The value of the product is 6.9 × 10⁵ m
How to determine the productIt is important to note that to determine the product of two different measurements, we need to make sure they have the same units.
Now, we have that;
6.9cm *10000000m
First, let's convert the centimeters to meters , we have;
1m = 100cm
then, xm = 6.9cm
cross multiply the values
x = 6.9/100
Divide the values
x = 6. 9 × 10⁻²m
Then, we have;
6. 9 × 10⁻² × 10⁷m
Multiply the values and add the exponents
6. 9 × 10⁻²⁺⁷
Add the values
6.9 × 10⁵ m
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Which of the following gives the volume of the solid created by revolving a curve f(x) around the y-axis?V=2Π∫ xf(x)dxV=Π∫ xf(x)dxV=2Πx2f(x)dxV=Π2∫ xf(x)dx
The volume of the solid created by revolving a curve f(x) around the y-axis is 2π [tex]\int\limits^a_b {xf(x)} \, dx[/tex]
What is the cylindrical shell?
A region enclosed by two identically sized cylinders with the same central axis is known as a cylindrical shell. We often denote the height of the cylinders by H, the inner cylinder's radius by r, and the thickness of the shell by t, resulting in a larger cylinder's radius equal to r + t.
Here,
We consider a strip of height y = f(x), and width dx; it is x units away from the axis of rotation.
Now, we rotate this strip about the y-axis; we obtain a cylindrical shell with
radius = x
height = f(x)
thickness = dx
The volume of cylindrical shell = (circumference)×(height)×thickness
= (2πx)×(f(x))×dx
The volume of revolution = 2π [tex]\int\limits^a_b {xf(x)} \, dx[/tex]
Hence, the volume of the solid created by revolving a curve f(x) around the y-axis is 2π [tex]\int\limits^a_b {xf(x)} \, dx[/tex]
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