4,5,6,6,7,7,8,8,8,8,8,9,9

What is the standard deviation and variance for these students' quiz scores?

Answers

Answer 1
Standard deviation = 1.46
Variance = 2.13

Related Questions

help. will give brainliest. please hurry!!! <3

also, please explain how to get my answer. need to show work.

Answers

Answer = 504 m2
Proof is below

if the length of a rectangle is 3 times of its breadth and perimeter is 96cm find the length and breadth of rectangle​

Answers

Breadth=x
Length=3x
Perimeter of a rectangle=2(l+b)
96=2(3x+x)
96=2(4x)
96=8x
x=96/8
x=12
Therefore breadth=12cm
Length=12*3=36cm

an office manager purchased 39 boxes of pens for the staff. each box contains 6 black pens and 4 blacks pens. Use the distribute property to write an equivalent expression for the total number of pens. them, simplify the expression​

Answers

Answer:

390 pens in total

Step-by-step explanation:

Each box has 6 black and 4 black

so the total amount of pens per box should be 10 because 6+4=10

Since we have to use distributive property you can write the equation (6+4)*39 because you need to figure out the total amount of pens in all the boxes.

6+4 is 10

and 10 * 39 is 390

therefore the answer is 390 pens in total

Which number is an irrational number?
A) 3.5
B) √ 36
C) √ 148
D)
37

100

Answers

Answer:

C) √ 148

Step-by-step explanation:

can someone pls answer both of these questions
WILL MARK BRAINLIEST

Answers

Answer:

Sorry I only know answer to the second question

That is 12000

Step-by-step explanation:

PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT PLEASE

make r the subject of this formula t=2r/r-1

Answers

[tex]t= \dfrac{2r}{r-1}\\\\\implies tr-t= 2r\\\\\implies tr -2r = t\\\\\implies r(t-2) = t\\\\\implies r = \dfrac{t}{t-2}[/tex]

The formula of r is t/t-2 for equation t=2r/r-1.

What is Equation?

Two or more expressions with an Equal sign is called as Equation.

The given equation is t = 2r/r-1

t equal to two times of r divided by r minus one

We need to find the formula for r

t = 2r/r-1

Apply cross multiplication

t(r-1)=2r

Apply distributive property on left side

tr-t=2r

Subtract 2r on both sides

tr-2r=t

r(t-2)=t

Divide both sides by t-2

r=t/t-2

Hence, the formula of r is t/t-2 for equation t=2r/r-1.

To learn more on Equation:

https://brainly.com/question/10413253

#SPJ2

The numbers 4 through 14 are placed in a bowl and drawn at random then replaced after being drawn.What is the probability that you will choose an even number

Answers

Answer:

The probability is probably about 55%

Step-by-step explanation:

If 10% of your paycheck was withheld for federal income taxes and another 6% for state income taxes, how much would your net (or take-home) pay be?

Answers

Your net income/take-home would be 84.6 percent of the gross amount.

What is net income?

Your net income is the amount of money left after payroll deductions in the form of taxes and other charges on the gross amount of your paycheck.

If we deduct federal and state taxes, 10 percent and 6 percent respectively, we would charge 10 percent and 6 percent of 100 and have 84.6 percent of your original(gross) income left.

Please read more about net income here:

https://brainly.com/question/22739980

What are the x-intercepts of this conic section?



no x-intercepts

(−1, 0) and (1, 0)

(0, −2) and (0, 2)

(0, −1) and (0, 1)

Answers

Using it's concept, it is found that the conic section has no x-intercepts.

What is a x-intercept of a function?


A x-intercept of a function is given by the value of x when y = 0. On a graph, it is the value of x when the function crosses the x-axis.

In this problem, the conic section given in the graph does not cross the x-axis, hence it has no x-intercepts.

More can be learned about x-intercepts at https://brainly.com/question/24737967

A triangular garden is being
formed by bricks. The three
sides measure 4 feet, 10
feet, and 3 feet in length.
Will these measurements
result in a triangle?

Answers

Answer:

Yes

Step-by-step explanation:

If there are three measurements, then it will result in a triangle.

The frequency table shows the number of students selecting each type of
food.
Nachos Popcorn Smoothies Total
Boys
5
6
4
15
Girls
6
8
4
18
Total
11
14
8
33
What proportion of students chose popcorn?

Answers

The proportion of students who chose popcorn will be 14/33.

How to calculate the proportion?

From the information, the frequency table shows the number of students selecting each type of

food.

The number of people who choose popcorn = 14

Total number of people = 33

Therefore, the proportion of students chose popcorn will be:

= 14/33

Learn more about proportion on:

brainly.com/question/19994681

#SPJ1

Answer:

0.42

Step-by-step explanation:

Latoya just bought a refrigerator for $931. She paid $139.80 in a down payment and will pay the rest in 4 equal installments. How much does she need to pay for each installment?

Answers

Answer:

$197.80

Step-by-step explanation:

$931.00 - $139.80 = $791.20

$791.20 / 4 equal installments = $197.80

Write a money problem you can solve using sharing, joining, or separating

Answers

Answer:

Jonny have 100 dollars and he gave his 2 friend's $20 how much does he have left?

Step-by-step explanation:

100-40=60

Jonny has 60 dollars left

Help help help math math

Answers

Answer:

>

Step-by-step explanation:

Negative is that amount below zero. For example -3 is 0 - 3. This means that since -3 is 3 less than 0, -3 < 0. This can also be said as 0 > -3.

Answer:

Answer: 0 (> )-3

Step-by-step explanation:

Hope it helps

8) Which table shows a proportional relationship between x and y?
1
y
1
4
2
3
4
8
4
6
10
с
12
8
А
9
16
14
16
12
22
20
20
15
28
x
3
.
y
5
1
12
6
10
2
14
12
D
w N
B
15
16
18
18
4
24
20
20
30
25
5
9 Danielle constructs a scale model of a building with a rectangular base. Her model

Answers

Answer:

  D

Step-by-step explanation:

A table shows a proportional relationship if all of the y/x ratios are the same.

  A: 4/3 ≠ 10/6 . . . . not proportional

  B: 6/12 ≠ 12/14 . . . . not proportional

  C: 2/4 ≠ 20/20 . . . . not proportional

  D: 1/5 = 2/10 = ... = 5/25 . . . . proportional relationship

Answer:

D

Step-by-step explanation:

1*5=5

2*5=10

3*5=15

4*5=20

5*5=25

(10) The population of bacteria an experiment can be modeled by d p(d)= 400(1.56)^d , where d is the number of days the population has been growing.

(a) Find the average rate the population has been growing over the interval 0≤d≤7.
Round to the nearest integer and include appropriate units.

(b) If the population of bacteria was modeled as a function of the number of hours, h,
such that h p(h)= 400b^h then what would be the value of b to the nearest thousandth?
Show or explain how you found your answer.

Answers

The average rate at which the population is growing over the interval 0≤d≤7 is 1228, while the exponential function as a function of hours is [tex]p(h)=400(1.56)^{\frac{h}{24} }[/tex]

What is an exponential function?

An exponential function is in the form:

y = abˣ

Where a is the initial value and b is the multiplication factor.

Let p represent the population of the bacteria after d days.

[tex]P(d)=400(1.56)^d\\\\P(7)=400(1.56)^7=8994\\\\P(0)=400\\\\\\Average\ rate\ of\ change=\frac{P(7)-P(0)}{7-0}=\frac{8994-400}{7-0} =1228[/tex]

b) 24 hours = 1 day, hence:

[tex]p(h)=400(1.56)^{\frac{h}{24} }[/tex]

The average rate at which the population is growing over the interval 0≤d≤7 is 1228, while the exponential function as a function of hours is [tex]p(h)=400(1.56)^{\frac{h}{24} }[/tex]

Find out more on exponential function at: https://brainly.com/question/12940982

Complete the missing exponent 64=4_

Answers

Answer:

64=4^3

Step-by-step explanation:

4x4x4=64. 4x4x4=4^3 as there are three 4s. Hope it helps!

The exponent is 3
Hope this helps

Write an equation of a parabola with the given vertex and focus. Vertex (3,-2); focus (3,-3). Y=

Answers

Answer:

help mee

Step-by-step explanation:

i neddd heplp with my mathh thankyou

An investor just purchased a rectangular 1-acre retail lot for $250 a frontage foot. If she paid $100,000 total, what was the depth of the lot?

Answers

The answer is 218’. A foot front is measured by property. So for this question, you need to find the frontage feet.

Find the 10th term. 10, 15,20,...

Answers

1:10
2: 15
3:20
4:25
5:30
6:35
7:40
8:45
9:50
10:55

Step-by-step explanation:

formula

an = a1 + (n - 1) d

10 = a1

15 = a2

20 = a3

n = unknown number

d = difference between each sequence

a10 = 10 + (10 - 1) 5

a10 = 10 + (9)5

a10 = 10 + 45

a10 = 55

— I just need help,
look at picture for information .​

Answers

Answer:

  a = √28

Step-by-step explanation:

The Pythagorean theorem tells you the area of the large square is the sum of the areas of the smaller two squares.

  8² = a² +6²

  a² = 8² -6² = 64 -36 = 28

Taking the square root, we find ...

  a = √28

A right rectanular prism has a length of 2 a width of 4 and a height of 5. How many unit cubes can fit in the prism

Answers

Answer:

40

Step-by-step explanation:

4 x 2 = 8 x 5

l x w x h

or

Bxh

This practice contains 15 questions. If you get 3 incorrect, what will your percent grade be? Hint: Grades are based on correct questions/total questions.

A. 30%
B. 0.8%
C. 20%
D. 80%

Answers

Answer:

D. 80%

Step-by-step explanation:

15-3 = 12

12/15 = 4/5 = .8

80%

can someone help me with this I already answered half of all of them but I need to make sure It's right?

Answers

Answer:

of 34.576:

34.576 = (3 * 101) + (4 * 100) + (5 * 1/101) + (7 * 1/102) + (6 * 1/103)

34.576 = (3 * 10) + (4 * 1) + (5 * 1/10) + (7 * 1/100) + (6 * 1/1,000)

34.576 = 30 + 4 + 5/10 + 7/100 + 6/1,000

34.576 = 30 + 4 + 0.5 + 0.07 + 0.006

Step-by-step explanation:

That is 34.576 in expanded form, so know you can know which is correct

Please help I'll mark brainliest ​

Answers

The answer is :his average is increase by 12
C: His average will increase by 12

Find the lateral surface area of the rectangular prism in centimeters

Answers

Answer:

180 cm2 is the answer you can multiply all sides

Answer:

Step-by-step explanation:

length = l = 9 cm

Width = w= 3 cm

height = h  = 4 cm

Lateral surface area = 2 *( lh+ lw)

                                 = 2*( 9*4 + 9*3)

                                 = 2 * (36 + 27)

                                 = 2 * 63

                                  = 126 square cm

What the value of w?

Answers

Answer:

56 degree

Step-by-step explanation:

90 - 34 = 56

Answer:

w = 56

Step-by-step explanation:

w + 34 = 90 (the angle is a right angle)

w = 90-34 = 56

PLEASE HELP I WILL GIVE BRAINLIEST

Answers

Step-by-step explanation:

37×2=74

360-74 = 286

286 ÷ 2=143

Of course, if AD and BC , and also BA and CD are even.

PLEASE HELP ME PLEASE

Answers

Answer

true

Step-by-step explanation:

Answer:

I think true because that's the only star that is closest to the earth

If you bought 28 shares of stock at $30/sh and sold them at $25/sh. And How much did you net after selling the shares? Was it a profit or a loss?

Answers

Answer:

selling price$840

it's a loss.

Step-by-step explanation:

cost price = 28× 30 = $840

selling prince =25×28=$700

since cost price is bigger than selling price, it's a loss.

Other Questions
prove that it is congruent Every time Martina orders Chinese food, she gets egg drop soup. So, she decides to learn how to make it herself. Her recipe calls for 8 cups of broth, but she can only find 32-fluid-ounce cartons at the store. How many cartons should she buy? cartons Chinese new year:When is the holiday?what does the holiday celebrate?How is this holiday celebrated?Why is xijinping famous for (overall)?ow did they accomplish what theyre famous for (tell me 2 specific actions)? La distancia entre dos ciudades A y B es de 255 km. Un automovil sale de A hacia B a una velocidad de 90 km/h. Al mismo tiempo sale, otro automovil de B hacia A a una velocidad de 80 km/h. Suponiendo su velocidad constante , calcula la distancia que ha recorrido cada uno hasta el momento del encuentro A soup can has a radius of 4.3 cm and a height of 11.6 cm. What is the approximate volume of the soup can? What is 5 x 3/20 as a fraction in its simplest form Shahida has seen an eagle landing at the top of the tree in her backyard. She places a camera on a tripod a distance of 12 feet from thetrunk of the tree. She angles the camera to the top of the tree so she can get a picture of the eagle. The height of the tree is 31 feet. Theheight of the tripod is 4 feet. In the 1820s and 1830s, who were mostoften hired as teachers? Is 1,-9 a solution to y=-9 PLEASE HELP AND EXPLAIN (WILL MARK BRAINLYIST)Figure JKLMN is a scaled version of PQRST. The two figures are shown below.The scale factor of figure JKLMN to figure PQRST is 3:2. If KL = 27 cm and MN = 45 cm, what is the length of side ST?A.30 cmB.40.5 cmC.67.5 cmD.18 cm How can report writers decide what type of graphic to use in a report? PLEASE HELP!PENN FOSTERPRACTICAL ENGLISH: WRITINGEXAM 700641Write a composition using one of the topics listed below. Your composition needs to be three to five paragraphs long. It must contain an introduction, a body, and a conclusion. Argue for or against the limitation of speed limits. Explain why a certain sport is your favorite. Compare and contrast driving in the winter and driving in the summer. Describe a SINGLE memorable day in your life.Write a letter of complaint. Follow the rules for a formal letter, and use the full-block style. The complaint may be about anything you wish (such as malfunctioning equipment, poor building maintenance, or disruptive noises from a nearby business). You can base your letter on a true experience, or you can make up all the details you need.Please note that a form letter or a template cannot be used in constructing your response to question 2. When a form letter or template is used, you are giving little to no thought to wording or formatting, and you are not actually creating your own complaint; you are simply filling in the blanks of someone else's work. For this reason, a grade of 1% will be issued if a form letter or template is used.ChecklistAsk yourself these questions after you answer the questions for your exam.Is my composition three to five paragraphs long? (It must include an introduction, body paragraphs, and a conclusion.)Did I select a topic for my composition from the list given in the instructions?Did I fully expand on the topic I selected for my composition? (Example: If you selected to describe a memorable day, you should only describe ONE day.)Does my letter include a complaint?Did I include all parts of a business letter? (This includes a signature! You can use a different font to indicate your signature.)Is my letter written in full-block style?Did I answer both questions on my own, without help from the internet? ) Which direction does thermal energy flow in the following diagram? *2 pointsHeat flows from the ice cream to the hand.Heat flows from the hand to the ice cream.The system is too cold for heat to move. A preposition that indicates direction ?Hint:I am going .......... school now ????? Whcih choice best describes the group this shape belongs in, based on the kinds of sides and angles it has? Angela chose A as the correct answer. How did she get that answer? Which sentence BEST summarizes Clarissa Dalloway's feelings about London, as revealed in the selection from Mrs. Dalloway? A. She loves London's people, vehicles, noise, and movement.B. She believes that London is too noisy and crowded for her taste.C. She pities the poor and miserable-looking people she sees in the city.D. She ignores people in the city who are not of her social class because she is a snob PLS HELP ME ASAP WILL MARK THE BRAINLIEST what isFind p(rolling a 4) What is the name of the building above? HELP ASAP I will give Brainliest to whoever answers first!What was a drawback to living in the Roman Empire? A. As many as 1 out of 3 people were enslaved. B. Roman law treated Romans of color unequally. C. If you were born to a low-status family, you had no chance of becoming powerful. D. Compared to living in other ancient civilizations, there were no serious drawbacks.