Assuming a 90% confidence level, the margin of error is approximately?

Assuming A 90% Confidence Level, The Margin Of Error Is Approximately?

Answers

Answer 1

Answer:

  0.3

Step-by-step explanation:

The margin of error is calculated as ...

  (standard deviation)/√(sample size) × (z*-score)

where the z*-score is chosen based on the desired confidence level.

Here, you have ...

standard deviation = 2.7√(sample size) = √225 = 15z*-score for 90% confidence level = 1.645

Putting these values in the above expression for margin of error gives ...

  2.7/15·1.645 = 0.2961 ≈ 0.3

Answer 2

Answer:

0.3.

between 20.3 and 20.9

Step-by-step explanation:


Related Questions

dora filed for chapter 13 bankruptcy in 2011. even if she planned to take the maximum time allowed under chapter 13 to repay her debts she must have planned to repay them by no later than what year

Answers

Answer:

2016 apex approved

Step-by-step explanation:

Answer:

Dora must have planned to repay her debts no later than year 2016.

Step-by-step explanation:

When a person enters into a Chapter 13 bankruptcy case, he or she can reorganize his/her debts or unpaid mortgage or any other loan payment. This can be paid off between three to five years with five years being the maximum allotted time frame.

So, if Dora filed for chapter 13 bankruptcy in 2011, she must have planned to repay her debts no later than [tex]2011+5=2016[/tex]

according to the rational root theorem, what are all the potential rational roots of f(x)=5x^3-7x+11

Answers

Answer:

[tex]\pm11,\pm1,\pm\frac{11}{5},\pm\frac{1}{5}[/tex]

Step-by-step explanation:

The given polynomial function is

[tex]f(x)=5x^3-7x+11[/tex]

According to the Rational Roots Theorem, the ratio of all factors of the constant term expressed over the factors of the leading coefficient.

The potential rational roots are

[tex]\pm\frac{11}{1}=\pm11[/tex]

[tex]\pm\frac{1}{1}=\pm1[/tex]

[tex]\pm\frac{11}{5}[/tex]

[tex]\pm\frac{1}{5}[/tex]

Jessica loves to read. She reads at a speed of 3 pages per minute. How many pages can she read in 2 hours? (First concert 2 hours into minutes)

Answers

Final answer:

Jessica, who reads at a speed of 3 pages per minute, can read 360 pages in 2 hours.

Explanation:

The subject of this question is mathematics, answered by a simple multiplication operation. Jessica loves to read and reads at a speed of 3 pages per minute. We know that there are 60 minutes in an hour, so in 2 hours, there are 2 * 60 = 120 minutes. Now, if Jessica reads 3 pages per minute, in 120 minutes, she would read 120 * 3 = 360 pages. Therefore, Jessica can read 360 pages in 2 hours at her reading speed.

Learn more about Multiplication Operation here:

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Which two numbers does 65/10 lie between?

Answers

Answer:

6 and 7

Step-by-step explanation:

because 65/10 equals 6.5

Answer:

It lies between 6 and 7

Solve –3(2 – 5w) = 9w + 66 for w.

Answers

-6 + 15w = 9w + 66

6w = 72

w = 12

Given the following linear function, sketch the graph of the function and find the domain and range. f(x)=2/3-3

Answers

Answer:

f(x)= 2/3-3 is undefined.

Please solve this question ASAP.

Answers

Answer:

m∠QPR = 80°

Step-by-step explanation:

Look at the picture.

We know: the sum of the measures of the angles of the triangle is equal to 180 °.

Therefore

In ΔTQR we have the equation:

[tex]\alpha+\beta+130^o=180^o[/tex]         subtract 130° from both sides

[tex]\alpha+\beta=50^o[/tex]

In ΔPQR we have the equation:

[tex]2\alpha+2\beta+m\angle QPR=180^o[/tex]

[tex]2(\alpha+\beta)+m\angle QPR=180^o[/tex]

Substitute from the first equation

[tex]\alpha+\beta=50^o[/tex]

[tex]2(50^o)+m\angle QPR=180^o[/tex]

[tex]100^o+m\angle QPR=180^o[/tex]            subtract 100° from both sides

[tex]m\angle QPR=80^o[/tex]

HELP PLS WILL MARK BRAINLIEST HAVE PICTURE BELOW
Drag a figure into each blank space so that the two figures in the row match the description.

Answers

Answer:

Figure 4: Square

Figure 1: Parallelogram

Figure 2: Rectangle

Step-by-step explanation:

Question 1: If they're not similar it can't be the same shape but if they have the same corresponding angles it has to be either a rectangle or a square. It can't be a rectangle so it must be a square.

Question 2: Can't be similar so it can't be the same shape. The only two shapes with side lengths proportional are the parallelogram and the rectangle. It can't be the rectangle so it must be the parallelogram.

Question 3: If it's similar it has to be the same shape so the answer must be the rectangle.

Answer:

hope this helps

Step-by-step explanation:

Write an equation of the circle whose radius is 3 and whose center is (-1,6).

Answers

Answer:

(x+1)^2 + (y-6)^2 = 3^2

Step-by-step explanation:

The general equation for a circle is given by

(x-h)^2 + (y-k)^2 = r^2

where (h,k) is the center and r is the radius

Substituting in the point (-1,6) and the radius 3

(x--1)^2 + (y-6)^2 = 3^2

(x+1)^2 + (y-6)^2 = 3^2

Eli claims that the product of and is . Which explains whether Eli is correct?

Answers

Answer: last option.

Step-by-step explanation:

According to the Product of powers property, you have:

[tex]a^n*a^m=a^{(n+m)}[/tex]

As you can see, when you can add the exponents when you have powers with equal base.

Then,  [tex]6^5[/tex]  and [tex]5^{-3}[/tex] do not have the same base, therefore, the exponents can't be added.

Therefore, Eli is incorrect, because he added the exponents even though the bases are not the same.

Answer:

d

Step-by-step explanation:

please mark brainliest

Giraffes are herbivores,or plant eaters. A giraffe can eat up to 75 pounds of leaves each day. Write and evaluate an expression to find how many pounds of leaves 5 giraffes can eat in a week.​

Answers

Answer: 2625

Let’s say you multiply 5 giraffes by 75 pounds = 375lbs 5 giraffes eat a day multiply the 5 giraffes and they answer should be 2625lbs

the First one witch for me is six (6)

Which of the following is the converse of the statement, "If you are smiling, thern you are happy"?
O A. If you are happy, then you are not smiling
O B. If you are not happy, then you are not smiling
O C. If you are not smiling, then you are not happy
O D. If you are happy, then you are smiling

Answers

The converse of the statement, "If you are smiling, then you are happy" is Option(C) "If you are not smiling, then you are not happy".

Converse of a statement -

The converse of a statement is formed by switching the hypothesis and the conclusion. Thus the converse of a true statement is always false and for conditional relation statement, "If true then yes". If there are two statement proposition p and q then the converse of the statements is denoted as p→q.

How to find the converse of the given statements ?

Original statement given "If you are smiling, then you are happy" .

Converse is just opposite of the given statement denoting the same meaning of the Hypothesis.

Thus we have the converse statement in Option (C),

"If you are not smiling, then you are not happy".

To learn more about converse statement , refer -

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A group of volunteers has been collecting toys to deliver to a local charity. Over the last 6 days, The volunteers have collected 492 toys. What has been their collection rate, in toys per day?

Answers

Answer:

82 toys per day

Step-by-step explanation:

492 divided by 6 = 82 (toys)

6 divided by 6 = 1 (days)

492/6 = 82/1

Answer:

a

Step-by-step explanation:

given the arithmetic sequence an=-1+7(n-1), what is the domain for n?​

Answers

Answer:

n E R

Step-by-step explanation:

Since 7n-8 is a linear equation with no restrictions, n's domain is real numbers.

Answer:

Step-by-step explanation:

with 1st term = -1. and common difference is 7

in this series we can say that 1st term is -1 , 2nd term is 6 , 3rd term is 13 , and so on

therefore in a series we cannot define a 0th term , so here n will be greater than or equal to 1.

On a local sports​ team, 20​% of 50 players are left​-handed. How many left​-handed players are​ there?

Answers

Answer:

10

Step-by-step explanation:

20%x50=10

Final answer:

To find the number of left-handed players on the sports team, 20% of the 50 total players is calculated, which equals 10 left-handed players.

Explanation:

To calculate the number of left-handed players on a local sports team where 20% of the players are left-handed, you need to apply the percentage to the total number of players. If there are 50 players in total, you would calculate 20% of 50:

Convert the percentage to a decimal by dividing it by 100. So, 20% becomes 0.20.

Multiply this decimal by the total number of players to find the number of left-handed players: 0.20  imes 50 = 10.

Therefore, there are 10 left-handed players on the team.

Patrick 8
Jeffery 12
Robin 7
Sally 15
Manuel 4
Ming 10
Jesse 12
Mark 17
Jenna 16
The owner of a car dealership keeps track of the monthly car sales for the salespeople at the dealership. What is the range for the number of cars sold?

My Answer:

Answers

The range is from 4 to 17.

When you are identifying a range you need to identify the highest and lowest number. This is your range because all of the other numbers are between the identified two.

Answer:

Step-by-step explanation:

4 to 17.. that is the answer to ur question love.

please graph this.
x + y ≤ 6
x ≤ 4

Answers

Answer:

The graph attached

y ≤ 6 - x

x ≤ 4

Step-by-step explanation:

∵ x + y ≤ 6

∴ y ≤ 6 - x

* Lets draw the line y = 6 - x

* Assume that:

· x = -1 ⇒ y = 7 ⇒ (-1 , 7)

· x = 0 ⇒ y = 6 ⇒ (0 , 6)

· x = 1 ⇒ y = 5 ⇒ (1 , 5)

· x = 2 ⇒ y = 4 ⇒ (2 , 4)

* Plot the points on the graph and make the line sold ( ≤ )

* Shade all the region under the line

∵ x ≤ 4

* Lets draw the line x = 4

* All the points on this line have x-coordinate = 4 (vertical line)

* Draw a vertical line on x = 4 the line is sold (≤)

* Shade all the region left to the line

* The solutions of this system of equations will be on the

  common shaded

  parts of the two lines (red and blue together)

Convert 6 pounds, 4 oz. to ounces.

64 oz.
76 oz.
95 oz.
100 oz.

Answers


[tex]1lb = 16oz. \\ 16 \times 6 = 96oz \\ 96 + 4 = 100 \: oz \\ the \: answer \: is \: 100 \: oz[/tex]

Answer:

The answer is 100 oz

Step-by-step explanation:

HOPE THIS HELPS YOU

Which ones are equivalent tell me all that apply:)

Answers

a) second and last one : 32x - 24 and 8*4x - 8*3

b) first and third one : 22y and 7y + 15y

pls mark brainliest!!

Answer:

a. b,d / b. a,c

Step-by-step explanation:

what decimal is equivalent to -7 / 8​

Answers

That decimal would be -.875

Hey there!

In order to find the decimal divide the numerator (top number) from the denominator (bottom number)

~ -7 ÷ 8 = 0.875 (as a decimal)

~ Thus your answer will most likely be, -0.875

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)

Find the value of x.

A.
2
B.
4
C.
6
D.
8



Please select the best answer from the choices provided

Answers

Answer:

Step-by-step explanation:

Answer:

The correct option is B.

Step-by-step explanation:

From the given figure it is clear that triangle LMN is a right angled triangle.

According to Pythagoras theorem: In a right angled triangle

[tex]hypotenuse^2=perpendicular^2+base^2[/tex]

In triangle LMN,

[tex]LN^2=LM^2+MN^2[/tex]

[tex](\sqrt{20})^2=x^2+(x-2)^2[/tex]

[tex]20=x^2+x^2-4x+4[/tex]

[tex]20=2x^2-4x+4[/tex]

Subtract 20 from both sides.

[tex]0=2x^2-4x+4-20[/tex]

[tex]0=2x^2-4x-16[/tex]

Taking out common factors.

[tex]0=2(x^2-2x-8)[/tex]

Splitting the middle term we get

[tex]0=2(x^2-4x+2x-8)[/tex]

[tex]0=2(x(x-4)+2(x-4))[/tex]

[tex]0=2(x-4)(x+2)[/tex]

Using zero product property we get

[tex]x-4=0\Rightarrow x=4[/tex]

[tex]x+2=0\Rightarrow x=-2[/tex]

The value of can not be negative because side of a triangle is always positive. So, the value of x is 4.

Therefore the correct option is B.

Theresa is planning to make a plastic cover for her new globe to keep it from being damaged. If Theresa’s new globe has a radius of 3 inches, then how much plastic will it take to cover her new globe?
A. 18(3.14) square inches
B. 72(3.14) square inches
C. 288(3.14) square inches
D. 36(3.14) square inches

Answers

Answer:

D

Step-by-step explanation:

The amount of plastic needed to cover the globe is the surface area of the globe. Since a globe is a sphere, the formula is SA = 4/3 πr³. Substitute r= 3 inches.

SA = 4/3 π(3)³ = 4/3 π * 27 = 36π

Use the slope formula to find the missing coordinate. m = -7/2 , T(13, 2), W(_, -5)
A. -11
B. 11
C. 15

Answers

Answer:

Option C. [tex]15[/tex]

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

[tex]m=\frac{y2-y1}{x2-x1}[/tex]

we have

[tex]T(13,2)\ W(x2,-5)[/tex]

[tex]m=-\frac{7}{2}[/tex]

Substitute the values  and solve for x2

[tex]-\frac{7}{2}=\frac{-5-2}{x2-13}[/tex]

[tex]-\frac{7}{2}=\frac{-7}{x2-13}[/tex]

equate the denominators

[tex]x2-13=2\\x2=2+13\\ x2=15[/tex]

Answer:

The answer is C-15

18........................

Answers

Answer:

D

Step-by-step explanation:

We will use the radical property  [tex]\sqrt{a*b} =\sqrt{a} \sqrt{b}[/tex]  to simplify this.

The problem is  [tex]\sqrt{169*x^5}[/tex]

We can simplify this as:

[tex]\sqrt{169*x^5} \\=\sqrt{169} \sqrt{x^5}[/tex]

Now we can use the property of radicals,  [tex]\sqrt[n]{x^a} =x^{\frac{a}{n}}[/tex]  , to write as:

[tex]\sqrt{169} \sqrt{x^5} \\13*x^{\frac{5}{2}}[/tex]

D is right answer.

Answer:

d. [tex]13x^{\frac{5}{2}}[/tex]

Step-by-step explanation:

The given expression is

[tex]\sqrt{169x^5}[/tex]

We can rewrite this as

[tex]\sqrt{169}\times \sqrt{x^5}[/tex]

We rewrite as a rational exponent to obtain;

[tex](13^2)^{\frac{1}{2}}\times (x^5)^{\frac{1}{2}}[/tex]

Recall that;

[tex](a^m)^n=a^{mn}[/tex]

[tex]13^{(2\times \frac{1}{2})}\times (x)^{5\times \frac{1}{2}}[/tex]

[tex]13^1 (x)^{\frac{5}{2}}[/tex]

The correct choice is D

[tex]13x^{\frac{5}{2}}[/tex]

There and Back Julian biked a 24 km trip to Guelph. On his way there, his average speed was 12 km/h. On his way home, he stopped for a break, so his average speed was only 8 km/h. What was his average speed, in km/h, for the entire round-trip?

Answers

Time taken by Julian to complete 24 km trip to Guelph at 12 km/h =

[tex]\frac{24}{12}=2[/tex] hours

Time taken by Julian for return trip at 8 km/h = [tex]\frac{24}{8}=3[/tex] hours

As given, the total distance is 24 + 24 = 48 km.

And the total time is 2 + 3 = 5 hrs.

Hence, the average speed for the entire trip is = [tex]\frac{48}{5}= 9.6[/tex]

The answer is 9.6 km/hour.

Line jk passes through points j(-4,-5) and k(-6,3). What is the value of b

Answers

Answer:

b = -21

Step-by-step explanation:

The formula of a slope:

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

b - y-intercept → (0, b)

We have the points J(-4, -5) and K(-6, 3).

The points J, K and y-intercept A(0, b) are collinear. Therefore the slope of JA and KA are the same.

We have the equation:

[tex]\dfrac{b-(-5)}{0-(-4)}=\dfrac{b-3}{0-(-6)}\\\\\dfrac{b+5}{4}=\dfrac{b-3}{6}\qquad\text{cross multiply}\\\\6(b+5)=4(b-3)\qquad\text{use the distributive property}\\\\6b+30=4b-12\qquad\text{subtract 30 from both sides}\\\\6b=4b-42\qquad\text{subtract 4b from both sides}\\\\2b=-42\qquad\text{divide both sides by 2}\\\\b=-21[/tex]

Plz help me i need it

Answers

Answer:  [tex]a)\quad f^{-1}(x)=\sqrt[3]{\dfrac{x+5}{3}}[/tex]

Step-by-step explanation:

Inverse is when you swap the x's and y's and solve for y. Note: f(x) is y

[tex]y=3x^3-5\\\\\text{Swap the x's and y's:}\\x=3y^3-5\\\\\text{Add 5 to both sides:}\\x+5=3y^3\\\\\text{Divide both sides by 3:}\\\dfrac{x+5}{3}=y^3\\\\\\\text{Take cubed root of both sides:}\\\sqrt[3]{\dfrac{x+5}{3}}=y[/tex]

How long will it take for Ramona to pay back her loan?

Answers

pretty sure it’s B if it’s talking about her car loan and that isn’t including the money she borrowed. lmk if that’s right

what would the graph of 10x + 7y < 49 look ?

Answers

Answer: The graph is attached.

Step-by-step explanation:

1. Solve for y, as following:

[tex]10x+7y<49\\7y<-10x+49\\y<-\frac{10}{7}x+\frac{49}{7}\\\\y<-\frac{10}{7}x+7[/tex]

2. The equation of the line in slope intercept form is:

[tex]y=mx+b[/tex]

Where m is the slope and b is the y-intercept.

3. In this case the equation of the line is:

[tex]y=-\frac{10}{7}x+7[/tex]

then:

[tex]m=-\frac{10}{7}\\\\b=7[/tex]

4. Find the x-intercept. Make y=0. Then:

[tex]0=-\frac{10}{7}x+7\\\frac{10}{7}x=7\\x=4.9[/tex]

5. Then, plot the line that passes through the points (0,7) and (4.9, 0).

6. The symbol of the inequality is < therefore, the line must be dashed and indicates that the region under the line must be shaded.

Then you obtain the graph attached.

Answer:

We need to graph the given inequality 10x + 7y < 49.

We can do that into 2 parts:

Part 1:

Graph the line 10x+7y=49

plug any number for x say x=0

10x+7y=49

10(0)+7y=49

0+7y=49

7y=49

y=49/7

y=7

hence it passes through point (0,7)

similarly plug y=0

10x+7(0)=49

10x=49

x=49/10

x=4.9

hence it passes through point (4.9,0)

Graph both points then join them by a straight dotted line because of < sign.

PART 2:

Shade the graph for inequality sign <

use any test point which is not on the given line say (0,0)

plug into original problem

10x + 7y < 49

10(0) + 7(0) < 49

0<49 is true

so shade in direction of test point

Hence final graph looks like:

Sketch seven points. Then, connect the points to form a closed plane figure. What kind of polygon did you draw?

Answers

It’s a heptagon, which has seven points.

Answer:

A Polygon that has 7 points would have to be a heptagon.

Step-by-step explanation:

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