What is set and example?

Answers

Answer 1

Set is the collection of objects with defined property and represented in curly brackets {} . Example: A = { 2, 4, 6 }.

Set is defined as:

The collection of objects in an organized manner with some defined property.It is represented by curly brackets {}.Two ways to represents the given set is set builder form and the roaster form.If we defined collection of books it is not considered as set as here no well defined property is mentioned.If it is collection of books written by any particular writer than it is a set.Example of set is defined as collection of even numbers less than 8 is written as A = { 2. 4, 6 }

Learn more about set here

brainly.com/question/28492445

#SPJ4


Related Questions

If ΔABC ~ ΔDEF , find the value of x .

Answers

Here you go! Hope this helps!

Find the distance from point $a\left(-1,\ 7\right)$ to the line $y=3x$. Round your answer to the nearest tenth. The distance is about units.

Answers

The distance from point [tex]$a\left(-1,\ 7\right)$[/tex] to the line [tex]$y=3x$[/tex] is about 4.5 units, rounded to the  nearest tenth.

The distance from point [tex]$a\left(-1,\ 7\right)$[/tex] to the line [tex]$y=3x$[/tex] is equal to the length of the perpendicular line from point [tex]$a$[/tex] to the line[tex]$y=3x$[/tex]. The formula to find the distance from a point [tex]($x_1, y_1$)[/tex] to a line [tex]$ax+by+c=0$[/tex] is given by:

[tex]$$\frac{|ax_1+by_1+c|}{\sqrt{a^2+b^2}}.$$[/tex]

Substituting[tex]$$\frac{|ax_1+by_1+c|}[/tex] into the formula, we get:

[tex]$$\frac{|-3(-1)+1(7)+0|}{\sqrt{3^2+1^2}} = \frac{20}{\sqrt{10}}.$$[/tex]

Therefore, the distance from point [tex]$a\left(-1,\ 7\right)$[/tex] to the line [tex]$y=3x$[/tex] is about 4.5 units, rounded to the nearest tenth

Learn more about distance here :

https://brainly.com/question/11348670

#SPJ4

How do you determine the nature of the roots of a quadratic equation example?

Answers

The nature of the roots of a quadratic equation is described by the discriminant calculated by seeing the equation and comparing it with the standard equation which is given by -

[tex]ax^{2} + bx+c[/tex] , where a , b , c are real numbers .

The root of the equation is given by -

x= (-b )± [tex]\frac{\sqrt{b^{2} - 4ac}}{2a}[/tex]

Here, the term (b^2 - 4ac) is called the discriminant of the quadratic equation .

This discriminant is the defining factor of the nature of the roots.

Now, here arise three cases-

(i) If (b^2 - 4ac) > 0, the roots are real and distinct .

(ii) If (b^2 - 4ac) = 0 , the roots are real and equal.

(iii) If (b^2 - 4ac) < 0 , the roots are not real and they are imaginary i.e. they are complex in nature and of the form a+ib.

Hence, it is the discriminant which determines the nature of roots.

To learn more about Quadratic Equations, visit link - https://brainly.com/question/17177510

#SPJ4

Find the domain for the rational function f of x equals quantity x plus 4 over quantity 3 times x minus 5.
1. negative infinity to negative five thirds and negative five thirds to infinity
2. negative infinity to five thirds and five thirds to infinity
3. (−[infinity], −4)( −4, [infinity]) (−[infinity], 4)(4, [infinity])

Answers

Answer:

  2. negative infinity to five thirds and five thirds to infinity

Step-by-step explanation:

You want the domain of the rational function f(x) = (x +4)/(3x -5).

Domain

The domain is the set of input values for which the function is defined. A rational function is undefined when its denominator is zero. f(x) is undefined when ...

  3x -5 = 0

  x = 5/3

So, the value 5/3 must be excluded from the domain of f(x). The domain of f(x) is ...

  -∞ < x < 5/3  ∪  5/3 < x < ∞

what is the distance from the focus to the vertex of a parabola with the equation
x = 1/12 (y-1)²

help please!

Answers

Answer:

3 units.

Step-by-step explanation:

In the equation x = 1/12 (y-1)², the vertex of the parabola is at the point (1,1). The focus of the parabola is located a distance called the "focal length" from the vertex.

The focal length is given by the formula f = 1/(4*p), where p is the coefficient of the x term in the standard form of the equation of the parabola.

In this case, the coefficient of the x term is 1/12, so the focal length is f = 1/(4*(1/12)) = 3. This means that the distance from the focus to the vertex is 3 units.

What is the statement of square?

Answers

Answer:

Step-by-step explanation:

Square's mission statement is simple. Square deliver “Economic Empowerment” to the thousands of business owners who use Square to manage their businesses.

What is the image point (-4, 5) after a translation right 5 units and 2 units up?

Answers

The image of (-4, 5) after a translation right 5 units and 2 units up is (1, 7).

What is the image of the point?

The given point P is "reflected" in the mirror and appears on the other side of the line an equal distance it. Drag the point P to see this. The reflection of the point P over the line is by convention named P' (pronounced "P prime") and is called the "image" of point P.

Going right means the x value goes up. In this case, it went to the right 5 spaces. so, all you have to do is add 5 with -4 which is 1.

When going up on a graph, the y value goes up as well. Add 2 with 5 which is 7.

Therefore, the answer is  (1, 7).

Hence , the image point (-4, 5) after a translation right 5 units and 2 units up is (1, 7).

Learn more about Image of a point at:

https://brainly.com/question/26642069

#SPJ1

A 20-foot ladder is leaning against the side of a house so that the bottom of the ladder is 12 feet from the base of the house. Will the ladder reach a window that is 14.5 feet above the ground?

Answers

Yes, because the 16 feet ladder will reach to the window that is 14.5 feet above the ground.

What is Pythagoras theorem?

Pythagoras' Theorem states that the square of the hypotenuse side of a right-angled triangle equals the sum of the squares of the other two sides.

The hypotenuse of a triangle, which has a straight angle of 90 degrees, has a square that, according to the Pythagoras theorem, equals the sum of the squares of the other two sides.

According to the question;

A 20-foot ladder is leaning against the side of a house.

Hypotenuse H= 20 feet

The bottom of the ladder is 12 feet from the base of the house.

Base B = 12 feet

And let P be the perpendicular.

Using Pythagoras theorem

H²= P² + B²

20² =12² +P²

P²= 400-144

P²= 256

Taking the square root.

P= 16 feet.

Since the height of the ladder is 16 feet, and we have to reach 14.5 feet above the ground.

16 > 14.5

That means, the ladder will reach to the window.

Hence, Yes, the 16 feet ladder will reach to the window.

To learn more about the Pythagoras theorem;

https://brainly.com/question/343682

#SPJ1

Which expression results in a rational number

Answers

Answer:

B. (w)(y)

Step-by-step explanation:

(w)(y)

= 2 * √8 * 3 * √2

= 2 * √(2*2*2) * 3 *√2

= 2 * √2 * √2 * √2 * 3 * √2

= (2*3) * (√2 * √2) * (√2 * √2)

= 6 * 2 * 2

= 24

A car moving at a constant speed passed a timing device at t = 0. After 9 seconds, the car has traveled 747 ft. Write a linear function rule to model the distance in feet d the car has traveled any number of seconds t after passing the timing device.

Answers

The linear function rule to model the distance d in feet of the car traveled after t seconds is d = 83t.

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

The distance traveled after 9 seconds = 747 ft.

The function rule to model the distance d after t seconds.

d = 83t

When t = 9,

d = 83 x 9 = 747 ft

Thus,

The linear function is d = 83t.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ1

What are the factors of 6x² 5x 6?

Answers

The factors of 6x² 5x 6 are: 1, 2, 3, 5, 6, 10, 15, 30, x, 2x, 3x, 5x, 6x, 10x, 15x, 30x, x², 2x², 3x², 5x², 6x².

1. Find the common factors of 6x², 5x, and 6:

The common factors are 1, 2, 3, 5, and 6.

2. Find the factors of each individual term:

For 6x²: 1, 2, 3, 6, x, 2x, 3x, 6x, x², 2x², 3x², and 6x².

For 5x: 1, 5, x, and 5x.

For 6: 1 and 6.

3. Combine the factors from each term to get the full list of factors:

The full list of factors is: 1, 2, 3, 5, 6, 10, 15, 30, x, 2x, 3x, 5x, 6x, 10x, 15x, 30x, x², 2x², 3x², 5x², and 6x².

Learn more about factor here

https://brainly.com/question/29128446

#SPJ4

Urgent!! Help plsssss

Answers

Answer:

Step-by-step explanation:B

Given: 3x < -9. Choose the solution set. {x | x > -1/3} {x | x < -3} {x | x < 3} {x | x > -3}.

Answers

Answer:

D is the answer

Step-by-step explanation:

For what value of k are the roots of the quadratic equation 3x² 2kx 27/0 real and equal * 1 point K 7 K 9 K 11?

Answers

The value of k where the roots of the quadratic equation are real and equal is k = 9.

Option B is the correct answer.

What is an equation?

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

Example:

3x + 6 = 9 is an equation.

We have,

3x² + 2kx + 27 = 0

This is in the form of ax² + bx + c.

a = 3

b = 2k

c = 27

Now,

The roots are real and equal.

D = 0

D = b² - 4ac

Now,

b² - 4ac = 0

(2k)² - 4 x 3 x 27 = 0

4k² - 324 = 0

4k² = 324

k² = 324/4

k² = 81

k = √81

k = ±9

Thus,

The value of k is 9 0r -9

Learn more about equations here:

https://brainly.com/question/17194269

#SPJ4

➡some one please help me please.

Answers

Answer:

Step 2

Step-by-step explanation:

3x-24=5x

he did -3x on each side but added 3x to 5x instead of subtracting

crestwood elementary school has an active four-square league, consisting of ten players, including justin and tim. each day at recess, the ten players split into two four-square games, each with five players in no relevant order. over the course of a semester, each possible match-up of five players occurs once. how many times did justin play in the same game as tim?

Answers

Justin and Tim have played the same game a total of 10 times.

There are 10 players in Crestwood Elementary's four-square league, including Justin and Tim. Over the course of a semester, each possible match-up of five players occurs once. This means that Justin and Tim have played the same game a total of 10 times.

To calculate this, we need to consider the different combinations of players that can make up a five-person game. There are a total of 10! (10 factorial) permutations of the 10 players, meaning that each possible game is made up of different players.

This includes the combination of Justin and Tim, which occurs 10 times. Therefore, Justin and Tim have played the same game 10 times during the semester.

For more questions like Players' combinations  click the link below:

https://brainly.com/question/27058240

#SPJ4

What is the 5th root called?

Answers

A root of degree 5 is called a fifth root.

A radicand, or nth root, in mathematics is a number r that, when raised to the power n, equals the number x: rn = x, where n is a positive integer, also known as the degree of the root. A root of degree 5 is called a fifth root.

The required number is the result of multiplying a fifth root by itself five times.

Due to the fact that two multiplied by itself five times is 32, 532 = 2

Seven multiplied by itself five times is 16807.

Hence 516807 Equals 7 since 7 x 7 x 7 x 7 = 16807.

To learn more about root link is here

brainly.com/question/16932620

#SPJ4

Rowan and 55 points playing a game Rowan’s mom earn three times as many points as a Rowan how many points does Rowan’s mom earn

Answers

The answer would be 165
rowens mom earned 165
55(3)=165

What is positive infinity called?

Answers

The Positive Infinity is called the Lemniscate.

Infinity:

Infinity is anything greater than infinity, infinity, or any natural number. Often represented by the infinity symbol {\displaystyle \infty }\infty. The most interesting point about infinity is – ∞ < x < ∞. This is a mathematical shorthand for negative infinity less than real and positive infinity greater than real. where 'x' represents a real number.

Positive Infinity:

Numbers approach negative infinity as they move left on the number line and positive infinity as they move right on the number line. Negative infinity is always less than any number and positive infinity is always greater than any number.

Positive Infinity: Differs from mathematical infinity in that:

A positive number divided by positive infinity yields positive 0.A negative number divided by positive infinity results in negative 0.0 multiplied by positive infinity yields NaN.NaN multiplied by positive infinity NaNPositive infinity divided by any negative number (except negative infinity) gives negative infinity.Positive infinity divided by any positive number (except positive infinity) yields positive infinity.

Learn more about Positive Infinity:

https://brainly.com/question/27954028

#SPJ4

2x+3y=0
x+2y=1
solving systems by substitution

Answers

Answer: x=-3, y=2

Step-by-step explanation: to solve using substitution, we need either x or y by itself in one equation. let's use x from the 2nd equation since it doesn't have a constant.

so the first equation stays the same at 2x+3y=0

for the second equation, rearrange to solve for x by moving the 2y to the right -> x=2y-1

then, we can plug in this x value to x in the first equation to get,

2(2y-1)+3y=0

then solve for y,

4y-2+3y=0

4y-3y=2

y=2

then to solve for x, plug in y in either of the initial equations. lets choose the second one.

so you'd have,

x+2(2)=1

x+4=1

x=-3

What is the mean in math?

Answers

A dataset's mean (also known as the arithmetic mean, which differs from the geometric mean) is calculated by dividing the sum of all values by the total number of values. The term "average" is frequently used to describe this measure of central tendency.

What does the mode mean?

By summing all the numbers in a data collection and dividing by the total number of values in the set, the mean (average) of the data set can be determined.

            A data collection is ordered from least to largest, and the median is the midpoint number. A data set's mode is the number that appears the most frequently.

What are the mean, median, and example?

The most frequent number, or the one that happens the most frequently, is known as the mode.

                    Example: Since the number 2 appears three times, more than any other number, it is the mode of the numbers 4, 2, 4, 3, and 2.

Learn more about mean in mode

brainly.com/question/6813742

#SPJ4

Which is a quadratic equation in FACTORED FORM?
A
f(x)=2x2+5x−12f(x)=2x^2+5x-12f(x)=2x
2
+5x−12

B
f(x)=2x+5f(x)=2x+5f(x)=2x+5

C
f(x)=2(x+5)2−12f(x)=2(x+5)^2-12f(x)=2(x+5)
2
−12

D
f(x)=2(x+5)(x−12)f(x)=2(x+5)(x-12)f(x)=2(x+5)(x−12)

Answers

Answer:

D) f(x) = 2(x + 5)(x − 12)

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

Given options:

A) f(x) = 2x² + 5x − 12,

this is a standard form of quadratic function.

B) f(x) = 2x + 5,

this is a linear function, not quadratic.

C) f(x) = 2(x + 5)² − 12,

this is vertex form of a quadratic function.

D) f(x) = 2(x + 5)(x − 12),

this is a factored form of a quadratic function.

Tyrese bought 35 tickets to use at a carnival. He used some of the tickets to ride the bumper cars and play some games. Now he has 28 tickets left. What is the percent of decrease in the number of tickets that he has?

Answers

The percent of decrease, in the number of tickets that he has, is 20%.

What is a percentage?

The term "percentage" refers to any ratio or number that may be expressed as a fraction of 100. And the sign "%" is used to denote it.

Given, Tyrese bought 35 tickets to use at a carnival.

He used some of the tickets to ride the bumper cars and play some games. Now he has 28 tickets left.

That means,

he used 35 - 28 = 7 tickets.

To find the percentage of decrease:

Let m be the percentage of decrease.

Then,

7 = m x 35 / 100

m = 700 / 35

m = 20

Therefore, the percentage of decrease is 20%

To learn more about the percentage;

https://brainly.com/question/24159063

#SPJ1

What is the solution to 2x² 8x X² 16?

Answers

Since the provided expression [tex]2x^{2} +8x-x^{2} +16[/tex]  is quadratic, the solution of x are "-4" and "-4" .

What is a quadratic equation?

Any equation in algebra that can be written in standard form as where x stands for an unknown value, where a, b, and c stand for known values, and where a 0 is true is known as a quadratic equation.

What are mathematical expressions?

An expression, often known as a mathematical expression, is a finite collection of symbols that are well-formed in accordance with context-dependent principles. An expression in mathematics is made up of numbers, variables, and functions (such as addition, subtraction, multiplication or division etc.) You may think of expressions as being comparable to phrases.

Expression:    [tex]2x^{2} +8x-x^{2} +16[/tex]  

This means that you need to add the two x² terms and the two x terms, which gives you [tex]x^{2} +8x+16[/tex].

Next, you can simplify the equation by taking out a common factor of x from the consecutive two terms, which gives you  [tex]x(x + 4) +4(x+4).[/tex]

Then the equation becomes [tex](x + 4)(x+4).[/tex] which on solving i.e [tex](x+4)=0[/tex]

you will get x= -4 and -4.

Therefore the solution to this equation is x = -4 or x = -4.

To know more about Quadratic Equation visit:

https://brainly.com/question/9549600

#SPJ4

6 1/2+2/3+3/4 calcution with distribution

Answers

By the distribution property 6(1/2 + 2/3+3/4) = 23/2    

Distribution Property:

According to the distributive property, multiplying the difference or aum of numbers will be equivalent to multiplying the individual parts of the difference or sum.

The expression that can explain the above rule is A ( B+ C) = AB + AC

Here we have

6(1/2 + 2/3+3/4)    

By distribution property

=> 6(1/2 + 2/3+3/4)  

= 6(1/2) + 6(2/3)+ 6(3/4)  

= 3 + 2(2) + 3(3/2)          

= 3 + 4 + 9/2

= 7 + 9/2

=  (14+9)/2        [ add 7 and 9/2 by taking 2 as LCM ]

=  23/2  

Therefore,

By the distribution property 6(1/2 + 2/3+3/4) = 23/2    

Learn more about Distribution Property at

https://brainly.com/question/6276874

#SPJ1

Complete Question:

1. Find the value of this fraction computation: 6(1/2 + 2/3+3/4)    

What is the greatest common monomial factor of 3x²-6x?​

Answers

Answer:

The greatest common monomial factor of [tex]3x^2 - 6x[/tex] is 3x.

Step-by-step explanation:

To understand what the problem is asking us, let's define the terms.

What does greatest common factor mean?

as factor means a term (x) that is a factor of  a number or another term (y),the greatest common factor means the greatest number (x) that is a factor of a number/another term(y)

⭐What does monomial mean?

as "mono" means 1,monomial means an expression or equation that consists of only 1 term

Thus, we need to find the greatest term that is a factor of [tex]3x^2 -6x[/tex]. This term must be a monomial.

First, divide both terms of the polynomial [tex]3x^2 -6x[/tex] by the largest term that is common between the terms.

[tex]3x[/tex] is the largest term.

[tex]3x[/tex] is also a monomial.

Therefore, [tex]3x[/tex] is the greatest common monomial factor.

⭐if this response helped you, please mark it the brainliest⭐

Solve for z [tex]2(5y+7x)^2=8\sqrt{3y-z[/tex]

Answers

The solution for z in the equation is z = 3y - 1/16(5y + 7x)⁴

How to determine the solution for z?

From the question, we have the following parameters that can be used in our computation:

2(5y+7x)²=8√(3y-z)

Rewrite the equation

So, we have the following representation

2(5y + 7x)² = 8√(3y - z)

Take the square of both sides

This gives

4(5y + 7x)⁴ = 64(3y - z)

Divide both sides by 64

1/16(5y + 7x)⁴ = 3y - z

So, we have

z = 3y - 1/16(5y + 7x)⁴

Hence, the solution is z = 3y - 1/16(5y + 7x)⁴

Read more about subject of formula at

https://brainly.com/question/657646

#SPJ1

What is the GCF of 28?

Answers

The greatest common factor of 28 is 7. Hope this helps. Please mark brainliest I need three more

HELP MEEEEEEEEEEEEEEEEEEEEE PLEASEEEEEEEEEEEEEEEEEEEEEEE
HELP MEEEEEEEEEEEEEEEEEEEEE PLEASEEEEEEEEEEEEEEEEEEEEEEEHELP MEEEEEEEEEEEEEEEEEEEEE PLEASEEEEEEEEEEEEEEEEEEEEEEEHELP MEEEEEEEEEEEEEEEEEEEEE PLEASEEEEEEEEEEEEEEEEEEEEEEEHELP MEEEEEEEEEEEEEEEEEEEEE PLEASEEEEEEEEEEEEEEEEEEEEEEEHELP MEEEEEEEEEEEEEEEEEEEEE PLEASEEEEEEEEEEEEEEEEEEEEEEE

Answers

Answer: 1.5 and 20

Step-by-step explanation:

What is the relationship between the volumes of a rectangular prism and a rectangular pyramid whose length width and height are all equal?

Answers

The volume of the rectangular prism is 3 times the volume of the rectangular pyramid.

Consider a rectangular prism with length l, width w and height h.

The volume of the rectangular prism is:

volume of a rectangular prism = length * width * height

V1 = l * w * h

Consider a rectangular pyramid with rectangular base of length l1, width w1 and the height of pyramid is h1.

The volume of the rectangular pyramid is:

volume of a rectangular pyramid = 1/3 * base area * height

Here, base area = length * width

                          = l1 * w1

So, volume of a rectangular pyramid = 1/3 * base area * height

V2 = 1/3 * l1 * w1 * h1

We have been given a rectangular prism and a rectangular pyramid have equal length, width and height .

l1 = l, w1 = w and h1 = h

so, V2 = 1/3 * l * w * h

V2 = 1/3 * V1

V1 = 3 * V2

volume of a rectangular prism = 3 * volume of a rectangular pyramid

Therefore, the relationship between the volumes of a rectangular prism and a rectangular pyramid whose length width and height are all equal:

volume of rectangular prism = 3 * volume of a rectangular pyramid

Learn more about the volume of rectangular prism here:

https://brainly.com/question/21308574

#SPJ4

Other Questions
What powers does the president pro tempore have? What happened to Latin America's economy after independence? green river company acquired 100% of the voting stock of the autostyle group on january 1 of the current year for a total acquisition cost of $250,000. the trial balance of autostyle on the date of acquisition follows. Researchers are completely certain that which of the following facial expressions is recognised by people of all cultures?A. InterestB. GuiltC. ContemptD. Surprise which of the following is a true statement about program commenting?question 20 options:program commenting is useful during initial program development and also when modifications are made to existing programs.program commenting is only needed for programs in development; it is not needed after a program is completed.program commenting should not be changed after it is first written.program commenting is useful when programmers collaborate but not when a programmer works individually on a project.question 21 (5 points) Congruent triangles. What does x equal? Is asymptote the same as discontinuity? Eating can be motivated by hunger or appetite. Classify each of the following scenarios as examples of hunger of appetite.Scenarios 1: After a 6-mile run, you feel weak and shaky, which are signs of low blood sugar. You stop at a vending machine and get a package of crackers to eat.Scenarios 2: After eating lunch, you feel satiated. However, when your friend asks you to join him for an ic cream, you get dessert anyway.Scenarios 3: after a long day of school following by work, you notice your stomach is rumbling. You open the refrigerator and grab a container of yogurt.Scenario 4: You are up late, studying for an exam. Without realizing it, you ate an entire bag of potato chips while reviewing your flashcardsHunger: Senario 1 and 3Appetite: Senario 2 and 4Phosphocreatine (PCr) is a high-energy compound that can be used to re-form ATP and is useful during bursts of activity that need maximal muscle contraction for at most 60 seconds. Which of the following statements about PCr and exercise is true? Select all that apply.A) Taking creantine to increase PCr in muscles may improve performance in those who undertake repeated bursts of activity if used in doses of 20 grams per day for 5-6 days following by maintenance dose of 2 games per day.B) PCr can be stored in large quantities in the musclesC) PCr can be activated instantlyA and C hi i want help with homework about my favorite team ( real Madrid FC ) a paragraph with 40 words or more With title of my favorite team is real Madrid-----------------------the transition sentences are important too thank you What means corporation tax? Indefinite Integralsf"(x)=6x, f'(-3)=20. f(-3) = -5f(x)= ? which of the following literary figures wrote a fictional book which recounts the adventures of a chivalrous knight who confronts reality through the lens of personal fantasy? The figure(Figure 1) is a graph of Ex. The potential at the origin is -140 V . What is the potential at x=3.0m? Expert Answer. Who are the experts? Explain whether the creation of Election Day improved the election process for Americans. What is meant by agile in TCS? Predict the next three numbers in the pattern 25,5,1,1/5,1/25 How do you stay safe during a traffic stop? What is parallel to the line y 3x 1? FILL IN THE BLANK using the ______-results in nothing left to hold the axis or axes in place, which could result in injury if you are not careful a physicist examines 28 sedimentary samples for potassium chloride concentration. the mean potassium chloride concentration for the sample data is 0.158 cc/cubic meter with a standard deviation of 0.0171. determine the 98% confidence interval for the population mean potassium chloride concentration. assume the population is approximately normal. step 1 of 2 : find the critical value that should be used in constructing the confidence interval. round your answer to three decimal places.