If X be a random variable taking values x1,x2,x3,….,x???? with probabilities P1,P2,P3,…..P????, respectively. Then, Var (x) is equal to …….. .

Answers

Answer 1

Using the probabilities the variance of x represented by Var(x) is equal to var(X) = E(X²) – [E(X)]² , where E(x)  represents the expected value of x.

Given the probabilities of the random variable given by x₁ , x₂ , x₃ ,... has the probabilities of P₁ , P₂ , P₃ ...

We know that Variance is given by the formula:

[tex]Var(x) = \sigma^2=\sum_{i=1} ^n (x_i-\mu)^2px_i)\\\\=\sum_{i=1} ^n(x_i^2-2x_i+\mu^2)\\\\=E(x^2)-[E(x^2)][/tex]

We know that expected value is denoted by E(x) .

Hence the variance is denoted by var(X) = E(X²) – [E(X)]² .

In probability theory and statistics, variance is the predicted squared deviation of a random variable from its population mean or sample mean.

The scattering, or how far apart from the mean a bunch of data are from one another, is measured by variance. A few ideas that involve variance are descriptive statistics, statistical inference, hypothesis testing, goodness of fit, and Monte Carlo sampling.

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Related Questions

Use the commutative law of addition to match the original expression on the left with its rewritten expression on the right.
35+82
9-6=15
7-3
15-9=6
27+13=40
3-7
13+27= 40
27+ 40 = 13
82 +35
cannot be rewritten

Answers

The commutative law of addition makes the expressions as,

35 + 82 → 82 + 35

7 + (-3) → (-3) + 7

15 - 9 = 6 → -9 + 15 = 6

27 + 13 = 40 → 13 + 27 = 40

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 commutative law of addition states that,

a + b = b + a

Now,

Using the commutative law we get,

35 + 82 = 82 + 35

7 - 3:

7 + (-3) = (-3) + 7

15 - 9 = 6

15 + (-9) = 6

(-9) + 15 = 6

-9 + 15 = 6

27 + 13 = 40

13 + 27 = 40

Thus,

The commutative law of addition makes the expressions as,

35 + 82 → 82 + 35

7 + (-3) → (-3) + 7

15 - 9 = 6 → -9 + 15 = 6

27 + 13 = 40 → 13 + 27 = 40

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out of 270 racers who started the marathon, 243 completed the race, 19 gave up, and 8 were disqualified. what percentage did not complete the marathon? %

Answers

The percentage is 10% who did not complete the marathon. It can be calculted using the formula of percentage.

What is percentage?

It is way of writting any number as a fraction of 100. Its symbol is % . It is a dimention less qunatity.

Total participants = 270

Number of participants completed the marathon = 243

Number of participants gave up = 19

Number of participnats disqualified = 8

Total number of participants who did not completed the merathon is the sum of participants who gave up and who did not qualified = 19 + 8 =27

Now, percentage of participants who did not complete the marathon is,

[tex]\frac{\text{Number of participants did not complete}}{\text{Total participants}}\times100\\=\frac{27}{270}\times100\\=10\%[/tex]

Hence, 10% did not complete the marathon.

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What is an equation of the line that passes through the point (8, 0) and is parallel to
the line x + y = 5?

Answers

Answer:

y = -x + 8

Step-by-step explanation:

x + y = 5

y = -x + 5

y = -x + b

0 = -(8) + b

b = 8

y = -x + 8

Could you please give me brainliest for this? Thank you!

What is the length of the midsegment AB? Type only the numerical answer.

Answers

Answer:

A is (3,4) B. is 18,4

Step-by-step explanation:

Check the picture below.

please hurry im about to run out of time

Answers

Answer: Quadrant 1, y-axis

Step-by-step explanation:

Morgan is making accsessories for the soccer team. she uses 574.35 inches of fabric on headbands for 32 players and 3 coaches. she also uses 276.16 of fabric on wristbands for just the players. how much fabric was used on a headband and wristband for each player?

Answers

Answer:

Step-by-step explanation:

574.35/35=16.41

276.16/32=8.63

16.41 + 8.63 = 25.04

7+8=8+7 identity property

Answers

Answer:The property used in 7 + 8 = 8 + 7 is Commutative property under addition

Step-by-step explanation:

Answer:

The identity property is a=a, so it is identity property

Step-by-step explanation:

???

The area of a rectangle is given by 2x-x-7x+9x+6cm

Answers

Answer: =3x+6

Step-by-step explanation:

Please help with this question. I need help this is too hard for my friend and I do not have time.

Answers

The  frequency table formed using tally marks can be analyzed by using the numbers indicated by the tally  marks as follows;

The true statements are as follows;

Twice as many students prefer green than purpleTwo more students prefer blue than purpleThe same number of students prefer yellow or purple as the number who prefer blue

What are tally marks in  a frequency table?

Tally marks makes use of vertical lines to represent data, in which the fifth count is represented by a diagonal line across four vertical lines;

The data in the table are as follows

The number of students that prefer red = 5 + 1 = 6

The number of students that prefer yellow = 2

The number of students that prefer Blue = 5

The number of students that prefer purple = 3

The number of students that prefer Green = 6

Therefore;

Twice as many students prefer green than purpleTwo more students prefer blue than purpleThe  same number of students prefer  yellow or purple as the number who prefer blue

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Sort the following polygons in order of increasing area.

Answers

The area of the polygons arranged in order of increasing Area is:

Rectangle  = 4Triangle = 12Square = 13

What is a polygon?

A polygon is a planar figure characterized by a limited number of straight line segments joined to create a closed polygonal chain in geometry. A polygon is defined as a bounded planar region, a bounding circuit, or both. A polygonal circuit's segments are known as its edges or sides.

The area of the triangle is given as:

[Ax(By - Cy) + Bx(Cy - Ay) + Cx(Ay - By)]/2

Where Ax and Ay are the x and y coordinates for the vertex of A. The same applies for the x and y notations of the B and C vertices.

Hence given:

A(-4-3), B(1, -3), C(-1,2)

we have

[-4(-3-2) + (1(2-(-3)) + (-1(-2-(-3))]/2

= 24/2

= 12

Hence the area of the triangle is 12.

To calculate the area of the rectangle, we use the distance formula. The equation for this is given as:

d² = (x₂ - x₁)² + (y₂-y₁)²

Where (x₁, x₂) are the coordinates of the first point and

(y₁, y₂) are the coordinates of the second point.

Assuming that the vertices are labeled as follows:

A (7,9), B(6,9), C(6,5), D(7,5), then

AB² = (6-7)² + (9-9)²
AB² = 1 + 0

AB = 1

BC² = (6-6)² + (5-9)²

BC² = 0² + -4²

BC = 4

CD² = (7-6)² +(5-5)²

CD² = 1² + 0²

CD = 1

DA² = (7-7)² + (9-5)²

DA² = 0² +4²

DA = 4

From the above, we can tell as is typical of a rectangle, that AB = CDand BC = DA

Since the Area of the rectangle is AB x CD OR BC x DA

The area of the rectangle =

4 x 1 = 4

Using the distance methods we can also arrive at the length of the sides of the square.

Since the area of a square is given as L² we only need the lenght one one side.

Hence,

AB = 3.60555

Hence the area of the square =

3.60555²

= 12.9999908025

Area of the square [tex]\approx[/tex] 13.

Thus the polygons arranged in order of increasing area are:

Rectangle = 4Triangle = 12Square = 13

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Dolores is making a music video using a drone. She sets the drone on a
platform 1 meter above the ground. Then she uses the controls to make it
rise at a constant rate. The drone reaches a height of 16 meters in 5 seconds.
What is the equation for the drone's height, y, as a function of time, x?
Jm

Answers

Answer: y=3x-1

Step-by-step explanation:

1st subtract 1 from 16 so 15 then do 15/5 to get 3 seconds

Denise works for a company where the IT department charges her department for actual usage of a SharePoint server, determining how often users log in and how much storage space her department consumes. What type of IT funding model is the company deploying?
chargeback

Answers

The company is deploying chargeback type of IT funding model where the IT department charges her department for actual usage of a SharePoint server, determining how often users log in and how much storage space her department consumes.

What is IT funding model?

A financing model is a planned, institutionalized strategy for creating a steady income stream to sustain an organization's core services and operations. Nonprofits need funding because it enables them to make investments in their operations and increase their overall effect. Securing funding is crucial to keeping your organization operational because nonprofits frequently rely on grants to assist with operational costs. Grants of all kinds are available to nonprofit organizations.

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PLSSSS help I will mark brainliest

The total distance a freely falling body covers in time, t, is given by the equation d(t)=1/2 gt 2 , where g is constant at 10 m/s 2 . Show, in terms of n, the distance a falling body covers in t = n seconds of movement.

Show, in terms of n, the distance a falling body covers in t = n - 1 seconds of movement.

The distance a freely falling body covers in the nth second is given by s (n) =d (n) -d(n-1). Show s (n)in terms of g, in simplified form.

Answers

it’s 2 because it make snese

In a hypothesis test for population proportion, you calculated the p-value is 0. 01 for the test statistic, which is a correct statement of the p-value?.

Answers

For the correct statement of the p-value, we would reject the null hypothesis.

There are two main methods for interpreting the statistical significance of a hypothesis test;

1) compare the p-value to the level of significance or

2) compare test statistics to a critical value.

Either method is acceptable, and is chosen by the researcher based upon which one is most typical in their field of research.

Under a hypothesis test we reject the null hypothesis if our p-value is less than the level of significance (p<α), and fail to reject the null hypothesis otherwise. Under the question, we are given a level of significance of 0.05 and a p-value of 0.01, where

p = 0.01 <α = 0.05

hence we would reject the null hypothesis. Thus the statement is TRUE.

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when conducting a one-way independent anova with three levels on the independent variable, an f-ratio that is large enough to be statistically significant tells us:

Answers

One or more of the mean differences are statistically significant, but not the precise location of the group differences.

In mathematical modeling, statistical modeling, and experimental sciences, there are dependent and independent variables. A variable that is independent is precisely what it sounds like. It is a stand-alone variable that is unaffected by the other variables you are attempting to assess. Age, for instance, might be an independent variable.

Dependent variables are so-called because, during an experiment, their values are examined on the assumption or presumption that they are governed by the values of other variables.

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help pls by pst sunday december 4, 2022 12:00 images below

Answers

You would solve this as her brother is 8 years older. So it would be her age, x, plus 8 years.
X+8 then you need to divide that all by x as it’s how many TIMES.
(X+8)/x

what is the difference between a convex set and a convex function with respect to linear programming?

Answers

A linear problem is always convex, because anything linear is convex.

What is linear programming?

A mathematical model whose requirements are expressed by linear connections can be optimized using a technique known as linear programming. A particular type of mathematical programming is linear programming.

A convex function is a real-valued function defined on an interval with the property that its epigraph (the set of points on or above the graph of the function) is a convex set. Convex minimization is a subfield of optimization that studies the problem of minimizing convex functions over convex sets.

Every linear function has a concave shape. However, only convex polygons (possible sets of linear programs) exist.

A linear problem is always convex, because anything linear is convex.

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11 black balls and 14 white balls are placed in an urn. two balls are then drawn in succession. what is the probability that the second ball drawn is a white ball if the second ball is drawn without replacing the first ball? a) 0.2333 b) 0.5376 c) 0.5600 d) 0.2567 e) 0.3033 f) none of the above.

Answers

The probability for the given condition is, 0.56.

What is probability?

The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. An event's probability is a number between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty.

Given:

11 black balls and 14 white balls are placed in an urn. two balls are then drawn in succession.

We have to find the probability that the second ball drawn is a white ball if the second ball is drawn without replacing the first ball.

P(white ball) = 14 / (11 + 14) = 14 / 25

P(2nd ball is white) = P(first ball is white)*P(2nd ball is white) + P(first ball is black)*P(2nd ball is white)

= (14 / 25) * (13 / 24) + (11 / 25) * (14 / 24)

=0.56

Hence, the probability for the given condition is, 0.56.

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A single die is rolled twice. Find the probability of rolling a 6 the first time and a 1 the second time.

Answers

Answer: I believe it is 2/12. tell me if I am wrong.

Step-by-step explanation: Hope this helps!

what is the equation of a line Parallel to -3x + 2y = 6
and through the point (4, -4)?

Answers

y= 3/2x - 10
Since it has the same slope and a different y-intercept it is parallel and it passes through point (4,-4)

if the expression $(12-x)\div(3x)$ represents a non-negative integer, what is the largest possible integer value of $x$?

Answers

The largest possible value of the expression (12 - x)/3x is 3.

Expression

In algebra, expression is the combination of variables, numbers and constants.

Given,

Here we have the expression (12 - x)/3x.

Now we have to find the  largest possible integer value.

As we have given in the question that the x takes only the non negative integer, then the values must be 1, 2, 3, ….

So, we have to apply the values on the given expression ,

Then we get the values,

=> x = 1 = > (12 - 1)/3(1) = 11/3 = 3.6

=> x = 2 => (12 - 2) / 3(2) = 10/6 = 1.6

=> x = 3 => (12 - 3) / 3(3) = 9/9 = 1

Therefore, the resulting value is 3.

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pls help im really slow and dont know how to do this

Answers

Answer:

2 1/6 more cups

Step-by-step explanation:

Answer: 2 1/6

Step-by-step explanation:

2 1/6

the wall thickness of 21 randomly selected glass 2-liter bottles was measured by a quality-control engineer. the wall thickness of those glass 2-liter bottles follows a normally distribution with unknown variance. the sample mean and the sample standard deviation of those 21 selected bottales was found to 4.15 millimeters and 0.09 millimeter, respectively. which of the following is the correct 90% two-sided confidence interval for the mean wall thickness?

Answers

The 90 % Prediction interval on the wall thickness of next bottle tested is (4.41, 4.99).

What is meant by Prediction Interval?

A prediction interval is a form of confidence interval (CI) used with regression analysis predictions; it is a range of values that forecasts the value of a new observation based on your existing model.

Confidence intervals and predictions are frequently used interchangeably. They are not exactly the same thing, though.

A confidence interval is a set of values connected to a population parameter. the population's mean, as an illustration.

Where you anticipate an upcoming number to fall is called a prediction interval.

The Interval Uncertainties

It doesn't imply that you can forecast with confidence where a single number will fall, just like with most things in statistics.

Confidence intervals are usually accompanied with a confidence level, which represents the amount of uncertainty.

How to solve?

X=4.7

s=0.7

n=25

The tabulated value of t at 24 degree of freedom is 2.06

t24=2.064

The 90 % Prediction interval on the wall thickness of next bottle tested is given by:

=(4.7±t24×0.7√25)

=(4.7−2.064×0.75,4.7+2.064×0.75)

=(4.7−0.28896,4.7+0.28896)

=(4.41,4.99)

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The Wood family bought 6 crates of eggs last week. Each crate had 12 eggs. Since then, they have eaten 27 of the eggs. How many eggs are left?

Answers

Answer:

  45 eggs

Step-by-step explanation:

You want to know the number of eggs left after 27 have been eaten from a supply of 6 crates having 12 eggs each.

Egg purchase

If each of 6 crates had 12 eggs, the number of eggs bought was ...

  (6 crates) × (12 eggs/crate) = 72 eggs

Eggs remaining

If 27 of those 72 were eaten, the number remaining is ...

  72 -27 = 45

45 eggs are left.

xyz dV where T is the solid tetrahedron with vertices (0,0,0), (1,0,0), (1,1,0), and (1,0,1)

Answers

The volume of the solid tetrahedron is [tex]\frac{1}{144}[/tex] cubic units.

T's base is a triangle in the xy-plane (z= 0), with one edge being the line y=x, z= 0; the front side is a triangle in the vertical plane x= 1; the left side is a triangle in the xz-plane (y= 0); and the top is the plane xyz= 0 (this plane contains the three points (0,0,0), (1,1,0), (1,0,1).

The equation must be ax+by+cz+d=0 and must be satisfied by the three points as well as the edge (x=y, z=0).

T is thus described as 0≤z≤(xy), 0≤y≤x, 0≤x≤1.

for which it is suitable to used V=dzdydx.

[tex]\int\limits\int\ \int\limits{xyz} \, dV=\int\limits^1_0 \int\limits^x_0 \int\limits^{x-y}_0 {xyz} \, dxdydz\\ \\ =\int\limits^1_0 \int\limits^x_0[\frac{1}{2}xyz^2]\limits^{x-y}_0 dydx\\\\=\frac{1}{2}\int\limits^1_0 \int\limits^x_0(x^3y-2x^2y^2+xy^3)dydx\\\\=\frac{1}{2}\int\limits^1_0 [\frac{1}{2}x^3y^2-\frac{2}{3}x^2y^3+\frac{1}{4}xy^4]\limits^x_0dx\\\\=\frac{1}{2}\int\limits^1_0\frac{1}{12}x^5dx\\\\=\frac{1}{2}[\frac{1}{72}x^6]\limits^1_0\\\\=\frac{1}{144}[/tex]

Thus, the volume of the solid tetrahedron is [tex]\frac{1}{144}[/tex] cubic units.

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Question 1-4
A punch bowl contained 4 liters of soda, 5 liters of orange juice, and 2 liters of raspberry juice.
Select the statements that are true.
The ratio of the entire punch bowl to the juices is 9: 11.
The ratio of the entire punch bowl to the orange juice is 11 to 5.
The ratio of orange juice to soda is 4 to 5.
4
The ratio of soda to the entire punch bowl is
11
The ratio of orange juice to raspberry juice is 5 : 2.

Answers

Answer:

Its the second one

Step-by-step explanation:

.

a ferris wheel is 16 meters in diameter and makes one revolution every 7 minutes. for how many minutes of any revolution will your seat be above 12 meters?

Answers

After 1.67 minutes, the Ferris wheel will be higher than 12 meters.

Given,

The Ferris wheel has a 16-meter diameter.

The circumference of a circle with a diameter of 16 meters, which is calculated as follows, is the distance travelled by the Ferris wheel in one rotation; 16π meter

The Ferris wheel makes one revolution in 7 minutes, hence the following is true:

16π meter = 7 minutes

1 meter = (7/16π) minutes

12 meters = (7 ×12)/16π minutes

12 meters = 1.67 minutes

Therefore,

The Ferris wheel will be above 12 meters after 1.67 minutes.

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this chart shows the changes in value of one share of a stock at the end of each day. the value of stock on mondag morning was 28.42$ a share. sam owns 12 shares a stock what is the total value of sams stocksl at the end of Friday​

Answers

Using mathematical operation, the value of stock on Friday is $341.04

The value of Share on Friday

To find the value of the stock on Friday, the value of the stock on Monday is $24.42. Since he own 12 shares, we can multiply 12 by $24.42.

This can be done using a mathematical operation called multiplication.

Multiplication is an operation that represents the basic idea of repeated addition of the same number. The numbers that are multiplied are called the factors and the result that is obtained after the multiplication of two or more numbers is known as the product of those numbers.

The value of the stock is 12 * 28.42 = 341.04

The stock value on Friday will $341.04

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what is a good half a mile time? today i ran it in 5:43. how can i improve that? i'm a 14 year old girl.

Answers

A good half a mile time is totally good, if a half mile is the longest distance you've ever run, try a 3/4 mile run the next time. After a few successful attempts at that distance, increase it to a mile.

In the given question, we have to explain, what is a good half a mile time.

First, some background is required for 5:43 for half a mile. When did you start running? Was that time calculated using a full effort, or was it only the distance covered without walking? Don't worry about if it's good if you're spanking new. Use it as a foundation.

Second, like with most things in life, practise makes perfect, and running performance is no exception. If a half mile is the longest distance you've ever run, try a 3/4 mile run the next time. After a few successful attempts at that distance, increase it to a mile. The goal is to gradually push your boundaries until you consistently cross that threshold and then push your limits even farther.

Your body will be encouraged to adapt to the challenge, grow to it, and become prepared for when the challenge gets harder.

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design a rectangular milk carton box of width w, length l, and height h which holds 512 cm3 of milk. the sides of the box cost 1 cent/cm2 and the top and bottom cost 2 cent/cm2. find the dimensions of the box that minimize the total cost of materials used.

Answers

The dimensions of the box that minimize the total cost of materials used are:

L = W = 16 cm

H =  32 cm

What is the rectangular dimension?

Two dimensions make up a rectangle: the length and, perpendicular to that, the breadth. A triangle's or an oval's interior likewise has two dimensions.

We have,

volume L* W * H = 512 cm³

sides of the box cost = 1 cent/cm²

top and bottom cost 2 cent/cm²

to find out

dimensions of the box that minimize the total cost of material use

we know here,

L* W * H = 512 cm³

where,

L is length and W is width and H is the height

so when we minimize the cost function

C( L, W, H ) = (1) 1 H ( L + W ) + (2) 1 L W

so put here H

substitute  [tex]H = \frac{512}{LW}[/tex] we get,

C(L, W) = 512([tex]\frac{1}{l}, \frac{1}{W}[/tex]) + 2LW

so

minimum cost will be when the two partial derivatives is 0

dC/dL = 2W - 512/L² = 0

so

dC/dW = 2L - 512/W² = 0

L =  256/W²

so

by solving the above equation we get

L = W = (256)⁻³ = 16cm

and

H = 512/16 = 32

H =  32 cm

Hence, the dimensions of the box that minimize the total cost of materials used are:

L = W = 16 cm

H =  32 cm

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what is the formula for square of a circle? a sailor strikes the side of his ship just below the surface of the sea. he hears the echo of the wave reflected from the ocean floor directly below 2.8 s later. how deep is the ocean at this point? some students work hard in school in order to get high grades. based on this information, these students are motivated by . a. homeostasis b. drives c. incentives d. instincts please select the best answer from the choices provided a b c d an object that is 4.00 cm tall is placed 18.0 cm in front of a concave mirror having a focal length of 20.0 cm. what is the location of its image in relation to the mirror and what are its characteristics? compared to the traditional western medical model, which of the following new insights from health psychology increases our understanding of health and disease? which resource(s) does the nurse utilize to identify the right client when administering medications? select all that apply. Which of the following describes the female pelvis compared to that of the male? A. The angle of the female pubic arch is smaller.B. The distance between the female ischial spines is greater.C. The obturator foramen is more oval in a female.D. The female iliac bones are less flared. Which statement about the filtering result of the following ACL is true?Router(config-ext-nacl)# permit tcp 192.168.1.0 0.0.0.255 host 192.168.100.1 eq 80Router(config-ext-nacl)# deny tcp any host 192.168.100.1 eq 80 consider a trial in which a jury must decide between the hypothesis that the defendant is guilty and the hypothesis that the defendant is innocent. in the framework of hypothesis testing and the u.s. legal system, which of the hypotheses should be the null hypothesis? Can someone help, please a client at a health care facility is being treated for cancer of the bladder. the physician uses a urinary diversion to help the client with urinary elimination. what describes a urinary diversion? How did the circulation of people, goods, and ideas across the Atlantic Ocean both complicateand contribute to the American victory in the Revolution? white circles that display on the sides and corners of a placeholder; enables the user to adjust the height and width of the object. Hear the sledges with the bells,Silver bells!What a world of merriment their melody foretells!How they tinkle, tinkle, tinkle,In the icy air of night!While the stars, that oversprinkleAll the heavens, seem to twinkleWith a crystalline delight;Keeping time, time, time,In a sort of Runic rhyme,To the tintinnabulation that so musically wellsFrom the bells, bells, bells, bells,Bells, bells, bells-From the jingling and the tinkling of the bells. Todd's living room is rectangular and measures 9 meters by 3 meters. Beginning in one corner, Todd walks the length of his living room and then turns and walks the width. Finally, Todd walks back to the corner he started in. How far has he walked? If necessary, round to the nearest tenth. after stealing your sister's easy-bake oven (which uses a 100 watt light bulb to cook cupcakes and stuff), you place a glass of water inside. ignoring the glass (and assuming all of the light is used to heat the water), how long would it take to raise the temperature of 0.6 kg of water by 60 k? express your answer in minutes. in addition to texas, which other mexican province began to be dominated by american characteristics such as described by austin in the above excerpt: due to increased immigration of american settlers ______california A 30-cm-diameter, 1.4 kg solid turntable rotates on a 1.4-cm-diameter, 450 g shaft at a constant 33 rpm. When you hit the stop switch, a brake pad presses against the shaft and brings the turntable to a halt in 12 seconds. Part A How much friction force does the brake pad apply to the shaft? after youve uploaded posts into hootsuitesbulk composer, whats the best place to vet and preview those scheduled posts? the nurse is teaching a client who has been diagnosed with hashimoto's thyroiditis. which statement correctly describes the process of autoimmunity?