Friday

July 25, 2014

July 25, 2014

Total # Posts: 286

**math**

in a class of 30 students, 17 have computers at home and 20 have cassettes. If 4 students in the class have neither a computer or a cassette, how many of the 30 students have both?

**stats**

if IQ is normally distributed with a mean of 100 and a standard deviation of 10, what stand score (z-score) would represent a person with an IQ of 75?

**stats**

if income in the us was normally distributed, what z-score would represent the top 1%?

**el camino real**

if income in the US was normally distributed, what z-score would represent the bottom 10%, the poorest 10%

**business communication**

You are writing to a reader who favors a different solution than the one you recommend. Which of the following is MOST likely to persuade the reader? A. Describe your reader's solution first, explain why it won't work, and then go on to describe your own solution. B. I...

**Statistics**

People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 90% confidence? Initial survey results indicate that standard deviation= 15.5 books.

**psychology**

Is the “reality” assumed by cognitive theorists relative or absolute? Why?

**Medicine**

Por Favor What advatage does Computerised tomography have over regular X-rays? Y Gracias!

**Writing**

My mother and I didn't see any more slang, but the one you told me. we read it out loud, but couldn't find none. Any more examples of slang in my story?

**Writing**

I revised it myself, I posted for someone else to look and tell me what I need to fix.

**Writing**

A perfect person or in other words, a goody-toe shoes is someone that has to have everything right. I'm not a perfect person, but I like things a certain way. Well, in the story, "The Possibility of Evil," a woman named Miss Strangeworth was that perfect person....

**angles**

find the largest negative co terminal angle of -417 degrees.

**science**

determine your distance traveled and displacement if you walk 100m forward and then 35m backward

**accounting**

Jan. 1 Purchased a small company and recorded goodwill of $150,000. Its useful life is indefinite. May 1 Purchased for $90,000 a patent with an estimated useful life of 5 years and a legal life of 20 years

**Early childhoodeducation**

I want to know what is positive peace

**chemistry**

how many moles of CO2 in .05M solution in .2L?

**Geometry**

Find the area of 33m, 30m, and 36.5m.

**algebra with applications**

what is the operations of 7+3*5

**spanish**

unscramble these- uolsrrsedeco

**math**

: Do you feel that mathematicians make to much of the mathematics and nature connection? Why?

**math**

Do you feel that nature influenced the development of geometry? How?

**math**

Should number theory be taught to grade school children?

**math**

In order to determine the amount of liquid a spherical tank will hold, would you need to use volume or surface area?

**math**

:Explain why a prime number must be deficient.

**math**

Why is number theory important in mathematics?

**science acids and bases**

what can you tell about the equations 2 P2O5?

**Language Arts**

....Poets, whoknow how to express so many beautiful things, are some of the most miserable people on the planet... Why is this Ironic?

**Language Arts**

Skiing was canceled on account of snow. Why is this Ironic?

**chemistry**

At what temperature (from your graph) do KNO3 and NaCL have same molar solubility?

**Chemistry**

Write a balanced equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, CaS.

**CHEMISTRY**

HOW MANY MG OF C2H4 MUST BE USED TO PRODUCED 875J OF HEAT

**CHEMISTRY**

WHAT MASS OF WATER CAN BE PRODUCED FROM 30.0G OF AMMONIA

**math**

A rectangular sheet of aluminum foil is 50 centimeters long and 20 centimeters wide, and weighs 5.4 grams. Find the thickness of the aluminum foil in centimeters

**physics**

A hammer falls from a scaffold on a building 50.0m above the ground. Find its speed as it hits the ground.

**Math **

find the other endpoint of a line segment with the given midpoint and one endpoint 0,0 and 4,-2

**physics**

Answering to drwls late, but 4.23m, the m is mass of m but it's 4.23 times greater. Hence, 4.23m.

**accounting**

Journalizing in a General Fund: Modified Accrual Basis: Issued $20 million in long-term bonds. Acquired several tracts of land at a total cost of $4million, paying the entire amount in cash.

**sociology**

I am in week 7 from Rasmussen as well in Nov 2013 still same question.

**sociology**

Me too, I am way beyond confused... Help would be greatly appreciated. Brenda, I bet its the same class and school lol.

**Physics**

The waves from a radio station can reach a home receiver by two paths. One is a straight-line path from transmitter to home, a distance of 21.0 km. The second path is by reflection from the ionosphere (a layer of ionized air molecules high in the atmosphere). Assume this refle...

**english**

I wrote this for my class and I just want to make sure I have it right. The role of education plays a very big part in the financial world. It's a big part of becoming successful. It can help with learning basic math skills in order to better your finances. It can also hel...

**gym**

ADOETEMED with five blanks. It is a phase. Help!

**chemistry**

Wrtie the equilibrium constant expression for the reaction of NH3 with water. the OH- concentration of .050 M ammonia, NH3, is 9.5 x 10^-4 M

**chemistry**

An unknown weak monprotic acid with the general formula HA has a Ka=5.5 x 10^-7. what is the value of the equilibrium constant that describes the following reaction? A- +H2O = HA +OH-

**Chemistry**

An automobile antifreeze mixture is made by mixing equal volumes of ethylene glycol (d=1.114 g/mL; M=62.07 g/mL) and water (d=1.00 g/mL) at 20 degrees C. The density of the mixture is 1.070 g/mL. Expreess the concentration of ethylene glycol as volume percent. I've tried t...

**Chemistry**

A baker uses sodium hydrogen carbonate as the leavening agent in a banana nut quickbread. the baking soda decomposes according to two possible reactions. 1. 2 NaHCO3 = Na2CO3+H2O+CO2 2. NaHCO3+H=H2O+CO2+Na. calculate the volume in mL of CO2 that forms at 180 degrees C and .975...

**chemistry**

on a particularly hot 30 degrees C day near the seashore the partial pressure of water vapor in the air is .0303atm. given that the atmospheric pressure is 1 atm and the composition of dry air is 78% N, 21% O and 1%Ar, what is the partial pressure of oxygen gas?

**Chemistry**

No i'm sorry that is not being accepted as the right answer

**Chemistry**

Find the average kinetic energy per molecule of He at 30 degrees C

**managerial eccon**

Suppose that a firm is currently employing 30 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is: $3,600. what is the averge variable cost?

**Business Research for Decision Making**

1. Decide on the type of tool or instrument you think would be effective given your topic on if there is no relationship between customer relationship and customer loyalty, explain why this type of tool would be optimal, and point to research which has used similar tools. 2. ...

**math**

How many one-to-one correspondences exist between two sets with A) 8 elements each? B) n-1 elements each?

**math**

these are the problems to convert to base 10. 1. CDXLIV 2. 432 then has five next to it 3. ET0 then has twelve next to it 4. 1011 then has two next to it 5. 4136 then has seven next to it

**college**

converting to base 10

**10th grade**

When using a calorimeter with two chambers what are the possible sources of error?

**10th grade**

3x-2-x=7-x

**chemistry**

what is the theoretical value for the M of acetic acid in vinegar if the vinegar is 5% acetic acid by a % mass value. Additional info: the experimental M of the acetic acid in vinegar is 0.80M Thank you!!

**grammar**

Identify the adjective clause in the following sentence. The book that is on the floor belongs to Johnny.

**English**

Identify the adjective clause in the following sentence. The book that is on the floor belongs to Johnny.

**chem**

Oh Dr.BOB...I am so lost..and sooo frustrated. Can you explain to me how to balance a chemical equation one more time please. Thanks Stacey

**chem**

Hi..Can you balance these 4 chemical reactions for me please: 1) Cu + 2Ag NO3 2) Zn + Al(NO3)3 3) Cu + ZnSO4 4) Ca + 2HCI Also will a chemical reaction occur in any of these? Thanks so much Stacey

**Chem**

what is the oxidation number on each of these ions - Ag2S + 2Al - 6Ag + Al2S3 Can you show your work? Thanks a bunch:)

**Physics**

A ladder 10-m long and weighing 50 N rests against a smooth vertical wall. If the ladder is just on the verge of slipping when it makes a 50 degree angle with the ground, find the coefficient of static friction between the ladder and the ground.

**chem**

How many moles of base are needed to neutralize 2 mol of acid for HNO3 + KOH - KNO3 + H2O?. Can u show your work please:) Thanks a bunch

**math**

How would you simplify this rational expression: Can you please show me the steps on how you get the answer thank you. 2y+1 over y-2 times (4-2y)

**Chem Dr Bob**

So your saying that sulphuric acid is used to test lead in water?

**chemistry**

Please I need help...I have been trying so hard to finad this answer... Suggest a test chemical that can be added to the water sample to precipitate the lead(II) ions. please show a chemical eqaution for the formation of the precipitate. Thank u so much:)

**Chemistry**

If 0.00002 mol of Na2S is the limiting reactant...how do I calculate the maximum mass of precipitate formed?

**Math Check**

I don't understand how you got to that answer

**Math Check**

y^2-5y over y^2-7y+10 What did I do wrong.. for my answer i got (y+5) over (y-2) and the correct answer is y over (y-2)??? How would you do this problem? 3x over x+1 = ? over x^2-x-2

**math check**

Simplify each rational expression. 3a(a-4)^2 over a^2(a-4) I don't understand how the answer would be 3(a-4) over a because the a-4 would cancel out??? 4-y^2 over y^2-2y once I simplify I get (2-y)(2+y) over (y-2)(y+2) I don't understand how the answer is -(y+2) over y...

**Math**

Simplify each rational expression. Can you please show me the steps on how you got the answer. Thank you (over means there is a line under the first expression and then the second expression is placed underneath the line) 2c^2-c-1 over 2c^2+3c+1 8c^2+2c over 4c+1

**chemistry**

why does chlorobenzene have a hogher bond energy than 1-bromobutane?

**math**

What does it mean to factor a polynomial?

**Chem**

Can you show me the structural formula, NOT molecular formula for C3H6 = Cl2 (g) - C3H6Cl2 Please...:)

**Chemistry**

Can you draw a structural formula illustrating the complete combustion of ethanol? Please...It is confusing to me!

**Chemistry**

Why is "4-heptonol" an incorrect IUPAC name? What is the correct name?

**PLZ HELP!!!! communication**

So I may not be correct, but I would say that the answer is False. I say that it is false because it is not an effective form of Communication. Selective listeningis when a person hears another but selects to not hear what is being said by choice or desire to hear some other m...

**biology **

A good website is called Animla and plants cells and shows pictures and is very informative. It will not let me type in the web address, but it is called animals and plants. it is a site from Purchon so add the 3 w's and the . com then slash biology slash cells. That is m...

**Social Studies**

The Roman alphabet, religion, mythology, and latin alphabet were borrowed from the greeks.

**math**

YEAH THANK YOU

**math**

8 / (4 / (-28)) = -56 I don't understand why? what are the steps to solving this problem?

**Chemistry**

Three naturally occurring allotropes of carbon are known to exist: amorphous, graphite and diamond.

**chem**

Can someone show me the structural formula (lewis diagram) for ethene??? Please

**Chem**

Determine the concentration of a dioxin solution whose percent absorbance is 0.40% This is the resulting: Absorbance Dioxin 0.64 5.5 0.76 6.3 1.0 8.0 But why can't I figure out the concentration whose percentage is .40%?

**Chemistry**

Determine the concentration of a dioxin solution whose percent absorbance is 0.40%

**Chemistry**

The volume of acetic acid in a sample of 500mL of vinegar is determined to be 1mL. What is the v/v percentage of the vinegar?

**Chemistry**

determine the mass of carbon monxide that is produced when 45.6 grams of methane reacts with 73.2 grams of oxygen gas. Can you please show work in detail please. Thanks

**Chemistry**

Can you determine the mass of carbon monxide that is produced when 45.6 grams of methane reacts with 73.2 grams of oxygen gas. Can you please show work in detail please. Thanks

**Chemistry**

The following reaction represents the decomposition for water: 2H2O - 2H + O How many molecules of hydrogen are produced from the decomposition of 12.2 grams of water into its elements?

**vocab cultures & dev**

a sentence with the word communist in it

**vocab cultures & dev**

sentence with the word cultural diffusion in it

**vocab for cultures * dev**

sentence with the word & meaning with commune

**Vocab for cultures & devel**

sentence for homogeneous

**History**

I have to write a five paragraph essay on the benefits of US expansion and the positive effects that it had on the philippines, cubans, china, and native americans. I can't figure out how to start it.

**Math**

In a series of three plays, a college football team had the following results:loses 5 yards, gains 8 yards, and loses 7 yards. Find the net gain (or loss) after this series. The answer is suppose to be 4. ( I keep getting -4)

**5th grade**

(8+7)x3x2=

**Algebra**

can you please answer my question h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 3 1 7 1 9 7 2

**english**

Identify the adjective clause in the following sentence. The book that is on the floor belongs to Johnny.

**english**

Identify the adjective clause in the following sentence. The book that is on the floor belongs to Johnny.

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