How many liters each of a 25% acid solution and a 65% acid solution must be used to produce 80 liters of a 40% acid solution? (round to two decimal places if necessary.)

Answers

Answer 1

Answer:

50

Step-by-step explanation:

To solve this problem, we can use the following formula:

(amount of solution 1) + (amount of solution 2) = total amount of mixture

We can also set up equations for the amount of acid in each of the solutions:

0.25(amount of solution 1) + 0.65(amount of solution 2) = 0.4(total amount of mixture)

We have two equations and two unknowns, so we can solve for the amounts of each solution. Let's set x to be the amount of the 25% acid solution and y to be the amount of the 65% acid solution. Then we have:

x + y = 80                (equation 1)

0.25x + 0.65y = 0.4(80)   (equation 2)

We can simplify equation 2 by multiplying everything by 100, to get rid of the decimals:

25x + 65y = 3200

Now we can solve this system of equations. One way to do this is to solve equation 1 for one of the variables, and substitute it into equation 2. We get:

x = 80 - y

25(80 - y) + 65y = 3200

2000 - 25y + 65y = 3200

40y = 1200

y = 30

So we need 30 liters of the 65% acid solution. To find the amount of the 25% acid solution, we can substitute y = 30 into equation 1:

x + 30 = 80

x = 50

So we need 50 liters of the 25% acid solution. Therefore, we need 50 liters of the 25% acid solution and 30 liters of the 65% acid solution to produce 80 liters of a 40% acid solution.


Related Questions

8x^5+3x^4-23x in standard form

Answers

Answer:

Step-by-step explanation:

[tex]8x^5 + 3x^4 - 23x\\= 8x^5+3x^4+0x^3+0x^2-23x+0[/tex]

What is the approximate perimeter of the triangle shown below?


Last question is 19.8…

Answers

The perimeter of the given triangle is: 19.2 units

What is the Perimeter of the Triangle?

The formula for the distance between two coordinates is:

D = √[(y₂ - y₁)² + (x₂ - x₁)²]

Thus: (0, 3)(4, -2)

Slant distance on left side of triangle = √[(-2 - 3)² + (-3 - 0)²] = 5.8 units

Slant distance on right side of triangle = √[(-2 - 3)² + (4 - 0)²] = 6.40 units

Length of horizontal part of triangle = 7 units

Thus:

Perimeter of triangle = 5.83 + 6.40 + 7 = 19.2 units

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please help i cant fail this

Answers

Answer:20%

Step-by-step explanation:

The next day you take Zeek to the Arizona State Fair. His mom gives him $30 to
spend. It costs $13 to get in and the $2 for every ride. How many rides can he ride?
● Define a variable, ex: x = ________.
● Write an equation to model this situation.
● Solve the equation for your variable.
● Write your answer in a complete sentence.
● Give the page a relevant title.

Answers

Answer:

Step-by-step explanation:

Let’s define the number of rides that Zeek can ride as “r”.

To determine how many rides Zeek can ride, we need to first subtract the cost of admission from his total budget:

$30 - $13 = $17

This means that Zeek has $17 left to spend on rides. Since each ride costs $2, we can set up the following equation:

$2r = $17

To solve for “r”, we divide both sides of the equation by $2:

r = $8.50

So Zeek can ride a maximum of 8 rides with the $17 he has left after paying for admission. However, since he cannot ride a fraction of a ride, he may be limited to only 8 rides or fewer.

4.1.2 Calculate the total number of deaths for all the countries.

Answers

Calculating the total number of deaths for all countries requires collecting data from various sources and summing up the individual death counts. Here is a step-by-step guide on how to approach this calculation:

Identify reliable sources: Look for reputable sources that provide updated and accurate information on global death counts.

Gather country-specific data: Access the data provided by these sources and collect the individual death counts for each country.

Validate and verify data: Cross-reference the data from multiple sources to ensure consistency and accuracy.

Sum up the death counts: Add up the individual death counts for each country to obtain the total number of deaths.

Regularly update the data: As the situation evolves, keep track of new data releases and updates.

Calculating the total number of deaths for all countries requires collecting data from various sources and summing up the individual death counts. Here is a step-by-step guide on how to approach this calculation:

Identify reliable sources: Look for reputable sources that provide updated and accurate information on global death counts. Examples include official government health agencies, international health organizations (e.g., WHO), and reputable databases (e.g., Worldometer, Johns Hopkins University).

Gather country-specific data: Access the data provided by these sources and collect the individual death counts for each country. Ensure the data is recent and covers a comprehensive list of countries.

Validate and verify data: Cross-reference the data from multiple sources to ensure consistency and accuracy. Different sources may have slight variations, so it's important to verify the data and use the most reliable figures.

Sum up the death counts: Add up the individual death counts for each country to obtain the total number of deaths. Use a spreadsheet or calculator to perform the calculations accurately.

Regularly update the data: As the situation evolves, keep track of new data releases and updates. Update the total number of deaths accordingly to maintain accuracy.
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The question probable may be:

How to calculate the total number of deaths for all the countries?

I need help urgently on this problem, please and thank you

Answers

The inverse of function f is [tex]f^{-1}(x)=\frac{4}{x}-3[/tex].

The domain of f is (-∞, -3) U (-3, ∞).

The range of f = (-∞, 0) U (0, ∞)

The domain of f⁻¹ = (-∞, 0) U (0, ∞).

The range of f⁻¹ = (-∞, -3) U (-3, ∞).

How to determine an inverse function?

In this exercise, you are required to determine the inverse of the function f(x). This ultimately implies that, we would have to swap (interchange) both the independent value (x-value or domain) and dependent value (y-value or range) as follows;

f(x) = y = 4/(3 + x)

x = 4/(3 + y)

3 + y = 4/x

f⁻¹(x) = 4/x - 3

[tex]f^{-1}(x)=\frac{4}{x}-3[/tex]

By critically observing the graph of this rational expression (function)   and its inverse shown in the image attached below, we can reasonably and logically deduce the following domain and range:

Domain of f = (-∞, -3) U (-3, ∞); {x|x ≠ -3}.

Range of f = (-∞, 0) U (0, ∞); {y|y ≠ 0}.

Domain of f⁻¹(x) = (-∞, 0) U (0, ∞); {y|y ≠ 0}.

Range of f⁻¹(x) = (-∞, -3) U (-3, ∞); {x|x ≠ -3}.

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Please help I’ll mark you as brainliest if correct

Answers

Answer:

5, 3

Step-by-step explanation:

pls answer me fast rapidly:

Answers

To multiply numbers in scientific notation, you can multiply the decimal parts and add the exponents of 10. Let's calculate the product of 4.3 × 10 and 2.4 × 10^0:

Decimal part: 4.3 × 2.4 = 10.32 (multiply the decimal parts)

Exponent part: 10 × 10^0 = 10^1 (add the exponents)

Combining these results, we have 10.32 × 10^1. However, to express this in scientific notation, we need to adjust the decimal part to be between 1 and 10. In this case, we can move the decimal point one place to the left, resulting in 1.032. The exponent increases by one accordingly.

Thus, the product of 4.3 × 10 and 2.4 × 10^0 expressed in scientific notation is 1.032 × 10^2.

Use the number properties rule to solve the equations below. Remember that PEMDAS tells you what to do first.

1) 5 + 16 = 16 + __

2) 450 + ___ = 50 + 450

3) 2 + ( 3 + 5 ) = ( 2 + 3 ) + _____

4) ( 7 + 4 ) + 6 = ___+ ( 4+6 )

5) 7 + 0 = ________

6) 15 – 0 = _______

7) (12 – 8 ) – 2 = _______

8) 12 – ( 8 – 2 ) = _________

9) 20 – 5 = _____

10) 5 – 20 = _______

Mark as true or false.

11) 16 + 4 = 4 + 16 ______________

12) 15 – 5 = 5 – 15 ______________

13) (3 + 4) + 5 = 3 + (4 + 5) ______________

14) (12 – 4) – 2 = 12 – (4 – 2) ______________

15) (10 -5) + 5 = 10 – (5 +5) ______________

Answers

After considering the given data we conclude that the value of the sub question are
A) 16
B) 50
C) 5
D) 7
E) 7
F) 15
G) 2
H) 6
I) 15
J) -15
And the marking the true and false
a) true
b) false
c)true
d) true
e) false

The number properties rule is a set of rules that help you solve mathematical equations. The rule is also known as the order of operations. The acronym PEMDAS is used to remember the order of operations. It stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right) ¹².

Let's solve the equations using the number properties rule:

A) 5 + 16 = 16 + __

We can solve this equation by subtracting 16 from both sides of the equation.

5 + 16 - 16 = 16 + __ - 16

5 = 16

The equation is not true.

B) 450 + ___ = 50 + 450

We can solve this equation by subtracting 450 from both sides of the equation.

450 + ___ - 450 = 50 + 450 - 450

___ = 50

The answer is 50.

C) 2 + ( 3 + 5 ) = ( 2 + 3 ) + _____

We can solve this equation by simplifying the parentheses first.

2 + (3 + 5) = (2 + 3) + _____

2 + 8 = 5 + _____

10 = 5 + _____

We can solve this equation by subtracting 5 from both sides of the equation.

10 - 5 = 5 - 5

5 = _____

The answer is 5

D) (7 + 4) + 6 = ___+ (4+6)

We can solve this equation by simplifying the parentheses first.

(7 + 4) + 6 = ___+ (4+6)

11 + 6 = ___+ 10

17 = ___+ 10

We can solve this equation by subtracting 10 from both sides of the equation.

17 - 10 = ___+ 10 - 10

7 = ___

The answer is 7

E) 7 + 0 = ________

The answer is 7

F) 15 – 0 = _______

The answer is 15

G) (12 – 8 ) – 2 = _______

We can solve this equation by simplifying the parentheses first.

(12 – 8 ) – 2 = _______

4 - 2 = _______

2 = _______

The answer is 2

H) 12 – (8 – 2 ) = _________

We can solve this equation by simplifying the parentheses first.

12 – (8 – 2) = _________

12 - 6= _________

6= _________

The answer is 6.

I)20 – 5= _____

20 - 5= _____

15= _____

The answer is 15.

J)5 –20= _______

5 - 20= _______

-15= _______

The answer is -15.

Mark as true or false.

a)16+4=4+16 ______________

True

b)15–5=5–15 ______________

False

c)(3+4)+5=3+(4+5) ______________

True

d)(12–4)–2=12–(4–2) ______________

True

e)(10-5)+5=10–(5+5) ______________

False
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Exponent
T-Table
Coincident (Consistent
Dependent)
Systems of Equations
Inconsistent
Consistent Independent
1.
2.
3.
4.
5.
6.
A set of two or more equations
with the same variables.
A system of linear equations with
EXACTLY ONE solution.
A system of linear equations with
INFINITELY MANY solutions.
A system of equations with NO
solution.
A number representing how many
times the Base number should be
multiplied by itself.
A chart of the different values for
an equation or graph.

Answers

A set of two or more equations with the same variables.

A system of linear equations with EXACTLY ONE solution.

A system of linear equations with INFINITELY MANY solutions.

A system of equations with NO solution.

A number representing how many times the Base number should be multiplied by itself.

A chart of the different values for an equation or graph.

Systems of Equations:

A set of two or more equations with the same variables.

These equations are solved simultaneously to find the values of the variables.
Consistent Independent:

A system of linear equations with EXACTLY ONE solution.

This means that the lines represented by the equations intersect at a single point.
Consistent Dependent (Coincident):

A system of linear equations with INFINITELY MANY solutions.

In this case, the equations represent the same line or overlapping lines, and every point on the line is a solution.
Inconsistent:

A system of equations with NO solution.

This occurs when the lines represented by the equations are parallel and never intersect.
Exponent:

A number representing how many times the base number should be multiplied by itself.

For example, in the expression[tex]2^3,[/tex] the exponent is 3, which means 2 should be multiplied by itself 3 times [tex](2 \times  2 \times  2 = 8).[/tex]
T-Table:

A chart of the different values for an equation or graph.

It typically includes two columns: one for the input values (usually x) and one for the corresponding output values (usually y).

T-tables are helpful for understanding the relationship between the variables in an equation and for plotting points on a graph.

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what would The number of discharge days for a patient admitted January 23 to February 15 is _____.

Answers

Answer:

The number of discharge days for a patient admitted January 23 to February 15 is 31 - 23 + 15 = 23

What is the surface area of a sphere with diameter 8 cm?

Answers

Answer:

A≈201.06cm²

Step-by-step explanation:

A=4πr2

d=2r

Solving forA

A=πd2=π·82≈201.06193cm²

PLEALSLE ANSWER FOR 70 POINTS
prove: the square of a number that is two more than a multiple of 3 is one more than a multiple of 3

Answers

Prove in below steps:

(3n + 2)² = 9n² + 12n + 4 = 9n² + 12n + 3 + 1 = 3(3n² + 4n + 1) + 1 = 1 more than a multiple of 3

Proved

Which is a whole number?
0.86
2/5
98
35%

Answers

Answer:

98 is a whole number

Step-by-step explanation:

0.86 is a decimal

2/5 is a fraction

35% is a percentage

Is x-7
a factor of
x^5+5x^4-2x^3+4x^2+8x+3976
?
Correct The remainder when you divide is

Answers

x-7 is a factor of [tex]x^5+5x^4-2x^3+4x^2+8x+3976$[/tex], we can use the Factor theorem which states that if f(a) = 0, then x-a is a factor of f(x).the remainder when we divide [tex]x^5+5x^4-2x^3+4x^2+8x+3976$[/tex] by x-7 is 4054.

To check if x-7 is a factor of [tex]x^5+5x^4-2x^3+4x^2+8x+3976$,[/tex] we can use the factor theorem which states that if f(a) = 0, then x-a is a factor of f(x).

To check if x-7 is a factor, we evaluate the polynomial at x=7:

[tex]f(7) = 7^5+5\cdot7^4-2\cdot7^3+4\cdot7^2+8\cdot7+3976 = 384004$.[/tex]

Since [tex]$f(7)\neq 0$[/tex], we can conclude that x-7 is not a factor of [tex]x^5+5x^4-2x^3+4x^2+8x+3976$.[/tex]

To find the remainder when we divide [tex]$x^5+5x^4-2x^3+4x^2+8x+3976$[/tex]by x-7, we can use polynomial long division or synthetic division. Using polynomial long division, we get:

  [tex]x^4 + 12x^3 + 82x^2 + 578x + 4046\\x-7 | x^5 + 5x^4 - 2x^3 + 4x^2 + 8x + 3976\\- x^5 + 7x^4[/tex]

    ------------

      [tex]12x^4 - 2x^3 + 4x^2 + 8x\\ 12x^4 - 84x^3[/tex]

          -------------

                     [tex]82x^3 + 4x^2 + 8x\\ 82x^3 - 574x^2[/tex]

                      --------------

                                  [tex]578x^2 + 8x\\ 578x^2 - 4046[/tex]

                                    ------------

                                              4054

Therefore, the remainder when we divide [tex]$x^5+5x^4-2x^3+4x^2+8x+3976$ by $x-7$ is $4054$.[/tex]

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A high school is building a new gym in the shape off a pyramid. Its base is a square with each side 500 feet long and has a slant height of 60 feet. What is the surface area of this pyramid?

Answers

The surface area of the pyramid is approximately 393,560 square feet.

To find the surface area of the pyramid, we need to find the area of each of the four triangular faces and the area of the square base.

The area of the square base is simply the area of a square with side length 500 feet:

Area of base =[tex](side length)^2 = (500 feet)^2[/tex]= 250,000 square feet.

To find the area of each triangular face, we need to know the length of one of the sides of the base and the slant height of the pyramid.

Since the base is a square, all sides have the same length of 500 feet.

Using the Pythagorean theorem, we can find the height of each triangular face:

height = √(slant heigh[tex]t^2[/tex] - base lengt[tex]h^2[/tex]/4)

height = √([tex]60^2 - (500/2)^2[/tex])

height = √(3600 - 62500/4)

height = √(3600 - 15625)

height = √20375

height ≈ 142.76 feet

Now we can find the area of one of the triangular faces:

Area of triangular face = (1/2) x (base length) x (height)

Area of triangular face = (1/2) x 500 feet x 142.76 feet

Area of triangular face ≈ 35,690 square feet

Since there are four triangular faces, the total surface area of the pyramid is:

Total surface area = 4 x (Area of triangular face) + (Area of base)

Total surface area = 4 x 35,690 square feet + 250,000 square feet

Total surface area ≈ 393,560 square feet

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I need assistance for 1b

Answers

The two numbers are 15 and 15. The product of the two numbers is 225.

Let x and y be the two numbers we are searching for. We know that x + y = 30, so we can settle for y to get y = 30-x. The result of x and y is then, at that point:

[tex]P(x, y) = x(30 - x) = 30x - x^2[/tex]

To find the greatest item, we can take the subsidiary of P(x, y) concerning x and set it equivalent to 0:

dP(x, y)/dx = 30 - 2x = 0

Settling for x, we get x = 15. Subbing x = 15 into y = 30-x, we get y = 15. Hence, the two numbers that have an amount of 30 and produce the biggest conceivable item are 15 and 15.

The result of the two numbers is:

P(15, 15) = 15 * 15 = 225

So the result of the two numbers is 225.

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Help, what is the value of x if the volume is 133 1/3

Answers

If the volume is 133 1/3 in³, the value of x is equal to 5 inches.

How to calculate the volume of a rectangular prism?

In Mathematics and Geometry, the volume of a rectangular prism can be calculated by using the following formula:

Volume of a rectangular prism = L × W × H

Where:

L represents the length of a rectangular prism.W represents the width of a rectangular prism.H represents the height of a rectangular prism.

By substituting the given dimensions (parameters) into the formula for the volume of a rectangular prism, we have the following;

133 1/3 = 10 × x ×  2 2/3

400/3 = 10 × x × 8/3

400/3 = 80x/3

80x = 400

x = 400/80

x = 5 inches.

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Given WX is tangent to ⊙S at point V, select all the statements that must be true.

A. m∠TVX =m∠TVX

B. m∠TSV =m∠UVX

C. m∠TVW = m∠TSV

D. m∠TUV =m∠TVW

E. m∠UVX =m∠VTU

Answers

Given WX is tangent to OS at point V, the statements that must be true include:

A. m∠TVX =m∠TVX

C. m∠TVW = m∠TSV

D. m∠TUV =m∠TVW

How to explain the tangent

In mathematics, a tangent is a line that touches a curve at exactly one point, without intersecting it at that point. The tangent line at a point on a curve represents the slope of the curve at that point. The concept of tangent is important in calculus, where it is used to calculate derivatives of functions.

TUV = 1/2MTU = TVW

TUV = TVW

Also, MTV = TSV = 2TVW

TVW = TSV

The correct options are A, C and D.

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Write the number 0.08 in scientific notation

Answers

The answer is 8 • 10^-2.

The scientific notation of 0.08 is 8 x [tex]10^{(-2)[/tex] where 10 raised to an exponent (-2).

In scientific notation, a number is expressed as the product of a coefficient and a power of 10.

To write the number 0.08 in scientific notation, it as a decimal number multiplied by a power of 10.

So, 0.08 can be written in scientific notation as 8 x [tex]10^{(-2)[/tex].

In scientific notation, the number is written as the product of a coefficient (8) and a power of 10 raised to an exponent (-2), indicating the decimal's position relative to the coefficient.

Therefore, the scientific notation of 0.08 is 8 x [tex]10^{(-2)[/tex].

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Find the area of the composite figure ?

Answers

The area of the composite figure is 81 yd². Option D

How to determine the area

The composite figure is made up of a rectangle, a triangle and a trapezoid

The formula for the area of a rectangle is expressed as;

Area = length × width

Substitute the values

Area = 7(6)

Multiply the values

Area = 42 yd²

Area of the triangle = 1/2 base ×height

Area of the triangle = 1/2 × 6 ×5 = 30/2 = 15yd²

Area of the trapezoid = a+b/2 h

Substitute the values

Area = 7 + 9/2 (3) = 16/2(3) = 8(3) = 24yd²

Total area = 24 + 15 + 42 = 81 yd²

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The area of the composite figure is 81 cm²

What is area of composite figure?

Area is defined as the total space taken up by a flat (2-D) surface or shape of an object.

Any figure that we can break and form more than one basic shape from is called a composite figure.

The figure consist of two trapezoid

Area of trapezoid 1 = 1/2( a+b) h

= 1/2 ( 12 + 7) 6

= 1/2 × 19 × 6

= 19 × 3

= 57cm²

area of trapezoid 2

= 1/2(a+b) h

= 1/2 ( 7+9) 3

= 1/2 × 16 × 3

= 8 × 3

= 24 cm²

Therefore the area of the composite figure

= 57 +24 = 81 cm²

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Is x-1
a factor of
x^5-3x^4-2x^3-5x^2+5x+12?
Correct The remainder when you divide is

Answers

The remainder theorem indicates that remainder when the polynomial x⁵ - 3·x⁴ - 2·x³ - 5·x² + 5·x + 12 is divided by (x - 1) is 8

What is the remainder theorem?

The remainder theorem specifies the relationship between the division of a polynomial by a linear factor to the value of the polynomial at a specified point

The remainder when the polynomial expression; x⁵ - 3·x⁴ - 2·x³ - 5·x² + 5·x + 12 is divided by x - 1, can be found using the remainder theorem by plugging in x = 1 in the function as follows;

f(1) = 1⁵ - 3 × 1⁴ - 2 × 1³ - 5 × 1² + 5 × 1 + 12 = 8

The remainder when x⁵ - 3·x⁴ - 2·x³ - 5·x² + 5·x + 12 is divided by (x - 1) therefore is 8

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18.3% of the animals in the local shelter are neither cats nor dogs. 2% of those animals that are not cats or dogs are rabbits. If there are 267 animals in the shelter, approximately how many of them are rabbits? Do not round any numbers until you finish the problem

Answers

Let's start by finding the percentage of animals in the shelter that are cats or dogs:

100% - 18.3% = 81.7%

Let's convert this percentage to a decimal:

81.7% = 0.817

Now, let's find the total number of animals that are cats or dogs:

0.817 x 267 = 218.139

We know that 2% of the animals that are not cats or dogs are rabbits. Let's find the percentage of animals in the shelter that are not cats or dogs:

100% - 81.7% = 18.3%

Let's convert this percentage to a decimal:

18.3% = 0.183

Now, let's find the total number of animals that are not cats or dogs:

0.183 x 267 = 48.951

We can now find the number of rabbits in the shelter:

2% of 48.951 = 0.02 x 48.951 = 0.97902

Therefore, approximately 0.97902 animals in the shelter are rabbits.

We should round this number to the nearest whole number, which is 1.

So approximately 1 animal in the shelter is a rabbit.

please show work I don't understand how to do this ​

Answers

Answer:

19.......

Step-by-step explanation:

correct

Answer:

x = - 2

---------------------------

Solve the equation for x:

- 3 = - 8x - 9 + 5x        simplify right side- 3 = - 3x - 9                add 9 to both sides9 - 3 = - 3x                  6 = - 3x                        divide both sides by - 3x = - 6/3x = - 2

Use substitution to solve the system of equations. How many solutions are there? 12 x − 13 y = 5 x = 23 y + 10 There are no solutions. There is one solution. There are infinitely many solutions.

Answers

Answer: there is one solution

Step-by-step explanation:

12x − 13y = 5

x = 23y + 10

lets substitute x into the first equation.

12(23y + 10) - 13y = 5

276y + 120 - 13y = 5

263y = -115

y = -115/263

substituting for x:

x = 23(-115/263) + 10

x = -2645/263 + 10

x = -15/263

As we can see, we get one value of x;

this means there is one solution

what is the addictive inverse of 36​

Answers

Answer:

Step-by-step explanation: -36

I need some help with this problem please

Answers

(a) The result of row 1 and row 2 interchange is [3     -2    3]

                                                                                 [2     3     1]

(b) The result of multiplying and adding the matrix is [-1       5     -2]

                                                                                         [3      -2      3]

What is the row operation of the matrix?

The row operation of the matrix is calculated as follows;

The given matrix;

[2     3     1]

[3     -2    3]

To interchange row 1 and row 2, we determine it as follows;

R₁ ↔ R₂   = [3     -2    3]

                  [2     3     1]

The product of row 2 and -1 is calculated as;

-1 (R₂) = [-3      2     -3]

The addition of -1(R₂) + R₁ is calculated as;

-1(R₂) + R₁ = [-3      2     -3] + [2     3     1]

-1(R₂) + R₁ = [-1       5     -2]

new matrix =  [-1       5     -2]

                       [3      -2      3]

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Which of the following statements are true?
Select all that apply.
A. 4 is a perfect cube.
B. 16 is a perfect square.
C. 2,197 is both a perfect square and a perfect cube.
D. 8 is a perfect cube.
E. 18 is neither a perfect square nor a perfect cube.

Answers

Answer:

B and D

Step-by-step explanation:

4²= 16

it's a perfect square

2³= 8

it's a perfect cube

What is the surface area of this cylinder? Use ≈ 3.14 and round your answer to the nearest hundredth. 18 yd 9 yd​

Answers

The surface area of the given cylinder is approximately 1758.4 square yards.

To find the surface area of a cylinder, we need to calculate the sum of the areas of its curved surface (lateral surface area) and its two circular bases.

Given:

Height (h) = 18 yards

Radius (r) = 10 yards

π (pi) ≈ 3.14

Lateral Surface Area:

The lateral surface area of a cylinder can be calculated using the formula 2πrh, where r is the radius and h is the height.

Lateral Surface Area = 2πrh

Substituting the given values, we have:

Lateral Surface Area = 2 × 3.14 × 10 × 18

Lateral Surface Area = 1130.4 square yards (rounded to the nearest hundredth)

Circular Bases:

The area of a circle can be calculated using the formula πr^2, where r is the radius.

Area of a Circular Base = π[tex]r^2[/tex]

Substituting the given radius, we have:

Area of a Circular Base = 3.14 × [tex]10^2[/tex]

Area of a Circular Base = 314 square yards

To find the total surface area, we need to add the lateral surface area and the areas of the two circular bases.

Total Surface Area = Lateral Surface Area + 2 × Area of a Circular Base

Substituting the values, we get:

Total Surface Area = 1130.4 + 2 × 314

Total Surface Area = 1758.4 square yards (rounded to the nearest hundredth)

Therefore, the surface area of the given cylinder is approximately 1758.4 square yards.

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Question

'What is the surface area of this cylinder? What is the surface area of this cylinder? Use I ~ 3.14 and round your answer to the nearest hundredth_ 18 yd 10 yd square yards'

What is -4 ≥ k - 2 I can not find it so please help...

Answers

The inequality -4 ≥ k - 2 can be solved by adding 2 to both sides of the inequality. This gives -2 ≥ k. So, the solution to the inequality is k ≤ -2.
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