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Total # Posts: 1,342

statistics
Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. (0.1 point) Percentage of scores...

psychology
need to identify at least four key milestones in the development of cognitive psychology as a discipline, need some data to help me discuss this question

anatomy
If a person has stopped breathing and is recieving pulmonary resuscitation would it be better to administer pure oxygen or a mixture of oxygen and carbondioxide?

anatomy
If a person has stopped breathing and is recieving pulmonary resuscitation would it be better to administer pure oxygen or a mixture of oxygen and carbon dioxide?

Life orientation
Any human or enviromental problem and the community is Mamelodi

psychology
Can I please have some information to help me discuss this question beloww: Analyze at lease two research methods used for uncovering basic emotions

Intermediate Algebra
Used ASCII Character Solve for X 5=6x+ 6x=5-9 6x=-4 x=-2/3

Intermediate Algebra
Solve this please 5=6x=9 6x=5-9 6x=-4 x=-2/3

statistics
At a ski area in Vermont, the daytime high temperature is normally distributed during January, with a mean of 22°F and a standard deviation of 10°F. You are planning to snowboard there this January. What is the probability that you will encounter daytime highs of a) 42...

Math
isnt it the sum of the X's squared divided by n or the sample?

ap government
What was the Roosevelt court-packing plan? What does it suggest about the relationship between the Supreme Court and the other branches of government?

algebra
A student opens a math book to two facing pages.The product of the page numbers is 210.Find the page numbers. The first page is _________ The second page is________

history
thank you.. oh i meant to write "food-aid" all in one term... I also have another question.. where can i find information about the affect of lives of people in the colonies during the 2oth century due to capitalism? thanks..

history
For my history class I need to identify these terms but do not know where I can find more info about them to make my answer a page long for each... these terms are.. FOOD AID and the Soviet-Afghan War that occured during the 20th century.. thanks

psychology
Mrs. Sue, The first question is as follows: Analyze how neuro processes effect behavior and impact the field of biological psychology. the following question must be addressed Describe the role of postsynaptic potentials, synaptic transmission, and receptors in producing and ...

psychology
Miss Sue, How are you? It has been a while. Thank you so much for your help. Have a nice evening

psychology
Working on a paper entitled: neurological processes. Would like to have some data to help me work on it. Thank you very much.

Using the factor Theorem
thank you so much dear mate, yes i took your advise and indeed i got it as a factor:) thank you.

Using the factor Theorem
use the factor theorem to determine whether x-c is a factor of f(x) f(x)=x^3+8x^2-18x+20; x-10 I have a doubt in my answer, i determined that x-10 is not a factor... am i right? please verify as my exam is tomorrow night at college. thank you for your time and hard work:)

english
thanks again!! :)

english
A primary concern is the substantial risks to women's health posed by the extraction procedure and the inability to obtain true informed consent from egg donors given the current lack of adequate safety data. can someone please break this sentence up to make it more ...

english
i'm writing a persuasive essay about human cloning (against it). do you knw any good articles that has disadvantages and risks of human cloning? thnx in advance

AP World History
I need to write an essay comparing how North American racial ideologies and their effects on society with Latin American/Caribbean racial ideologies and their effects on society. Can't find annnyyythinggg on Latin American/ Caribbean racial ideologies and their effects on ...

statitics
find the probility that when 4 managers are randomly selected from a group of 20, the 4 oldest are selected

chem
The real equation should be something like this: H2S + O2 -> S + H2O Balancing the equation: 2 H2S + O2 -> 2S + 2H2O The question does not mention anything about methane, CH4. Also, The sulfur in the equation (mistaken as methane, i suppose) is one of the product, not ...

Algebra 1
How do you graph y=1/2x+1 y=-3x+8

History
Hello, I am doing this History project where we are required to differentiate the violence exerted by the great powers in context of New Imperialism and the First World War. The problem is that I am having trouble finding articles that actually talk about the violence that was...

math
what are the x-intercepts here? y=x^2+2x-35 y=x^2+2x-48

math
(√12 x √16)/√75 √(12/25) how to simplify these?

Math
If qrs / r = s and the value of q is 0, which of the following must be true? Explain why. a) r = 0 b) s = 0 c) s / r = 1 d) qr / r = 1 e) s = 2r

Math
Choice C. Thanks.

Math
Sorry about that but thanks for your help. a) 4 x 1/10 b) 4 x 1/100 c) 4 x 1/1,000 d) 4 x 1/10,000 e) 4 x 1/100,000

Math
In the number 0.3645, which of the following does the digit 4 represent? Explain why.

sew
This is the taking of extra measurement on the pattern

math
3.0970 x 1500.

math
which number sentence is 6 fewer than 11

Math
I posed a problem and no one helped me to see how to solve the problem. I don't want you to give me the answer, I want to know how to arrive at the correct answer. Again, Ms. Pecho currently owes $637.50 in simple interest on a loan of $25oo at an annual interest rate of ...

Math
Ms. Pecho currently owes $637.50 in simple interest on a loan of $2500 at an annual interest rate of 17%. How long has she had the loan? How do you figure out this problem? I am not merely looking for an answer, I would like to know how to do it to know if he is doing it ...

Math
8th grade math. I cannot help my grandson with his math. I do not understand it myself. It is dealing with percentages. I do not understand it.

8th grade
I see no school subject box

8th grade
Math. I thought it was understood when I said math homework and the question asked about percentages.

8th grade
Ms Pecho currently owes $637.50 in simple interest on a loan of $2500 at an annual interest rate of 17%. How long has she had the loan. This is his problem and I have no clue how to help him but I do know the answer he came up with is 18.77. That seems wrong to me.

sewing.
1.B 2.A 3.D

psychology
Thanks a lot Ms. Sue, It has been a while. How are you?

psychology
Ms. Sue, could you help me find some data to answer the question below. What are both the advantages and disadvantages of classifying mental disorders into types and maintaining such taxonomy for clinical reference ? Explain your answer for both. thank you

Science
Can you explain how attractions between molecules could cause polar water to have a higher boiling point than a non polar carbon dioxide?

college
This was written the first way. Do you still calculate the same way? Thanks for the help!

college math
Decide whether the pair of lines is parallel, perpendicular or neither. 5x+3y=4 3x+5y=5

algebra
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 mph and B is traveling at 120 mph. Train A passes a station at 9:10 pm. If train B passes the same station at 9:25pm what time will train B catch up with train A?

algebra
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 mph and B is traveling at 120 mph. Train A passes a station at 9:10 pm. If train B passes the same station at 9:25pm what time will train B catch up with train A?

statistics
How do you solve this problem? physical therapy reported that it has been estimated that 80 percent of all lower back pain cases are caused by weak trunk muscles. if 15 patients with lower back pain are examined, what's the probability that 1. exactly 10 have pain caused ...

chemistry
Will tetrahedral [ZnABCD]2+ display optical isomerism?

Calc
how do I integrate x^4-3y^3+2y^2? thanks

4th grade
Mrs. Slaten i need your help.

chem
why cant the molecule C2H6N exists?

literature
Read the following passage from act 3, scene 2.       So we grew together,       Like to a double cherry, seeming parted,       But yet an union in partition; In this passage, Helena is referring both to herself and to A. ...

Economics/Algebra
I know the answer for a. Profit maximizing quantity: 450 Profit maximizing price: $55 Profit: $20,250

psychology
What are some of the characteristics of a Type A personality? How might having a Type A personality affect a person’s reaction to stress? What would you view as some advantages or disadvantages of a Type A personality?

11th grade Physical Science
A 2-kg block rests on a wall that is 3 m tall. What is the gravitational potential energy of the block? The force of gravity on Earth (g) is equal to 9.8 m/s2.

Finance
What experience(good or bad)do you (or someone you know)have with IRS or any other taxing authority.

Finance
Two things are certain life and death and taxes we often hear. Do you think it is justfied for government to levy taxes why or why not.

physics
A 2-kg block rests on a wall that is 3 m tall. What is the gravitational potential energy of the block? The force of gravity on Earth (g) is equal to 9.8 m/s2.

chemistry
The mass of a golf ball is 45.9g . If it leaves the tee with a speed of 80.0m/s , what is its corresponding wavelength?

chemistry
The mass of a golf ball is 45.9g . If it leaves the tee with a speed of 80.0m/s , what is its corresponding wavelength?

Chemistry
What minimum frequency of light is required to ionize potassium in419 KJ/mol?

Chemistry
A microwave oven operates at 2.40 GHz . What is the wavelength of the radiation produced by this appliance?

Chemistry
A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz), where 1 MHz=10^6 Hz . Calculate the broadcast wavelength of the radio station 107.1 FM.

chemistry
How many grams of Na2CO3 can be produced from 2.715 g NaHCO3?

chemistry
How many grams of Na2CO3 can be produced from 2.715 g NaHCO3?

Chemistry
A 2.85g sample of an unknown chlorofluorocarbon is decomposed and produces 560mL of chlorine gas at a pressure of 754mmHg and a temperature of 298K . What is the percent chlorine (by mass) in the unknown chlorofluorocarbon?

Chemistry
A 260-ml flask contains pure helium at a pressure of 756torr . A second flask with a volume of 470ml contains pure argon at a pressure of 717 torr . A)If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? B)If ...

Chemistry-Please help
When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction CaCO3(s)---->CaO(s)+CO2(g) How many grams of calcium carbonate are needed to produce 59.0L of carbon dioxide at STP?

Chemistry-Please help
If 1.00mol of argon is placed in a 0.500- container at 28.0 degree Celsius, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation)? For argon,a=1.345(L square. atm)/mol square and...

Chemistry-Please help
A 3.00-L flask is filled with gaseous ammonia, . The gas pressure measured at 17.0 degree celsius is 2.35atm . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

Chemistry-Please help
How many air molecules are in a 12.0*12.0*10.0 ft room? Assume atmospheric pressure of 1.00 atm, a room temperature of 20.0 degree Celsius , and ideal behavior. Volume conversion:There are 28.2 liters in one cubic foot.

Chemistry-Please help
In an air-conditioned room at 19.0 degree celsius , a spherical balloon had the diameter of 50.0cm . When taken outside on a hot summer day, the balloon expanded to 51.0cm in diameter. What was the temperature outside in degree celsius? Assume that the balloon is a perfect ...

Chemistry-Please help
Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules. A)What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.

8th grade literacy
what is the difference between hype and reality?

Biochemistry
What physical properties are different for the isomers of C4H10? Explain.

Chemistry-Please help
2C8H18(g)+25O2(g)-->16CO2(g)+18H2O(g) 0.290mol of octane is allowed to react with 0.600mol of oxygen.The limiting reactant is Oxygen. How many moles of water are produced in this reaction? After the reaction, how much octane is left?

Chemistry-Please help
2C8H18(g)+25O2(g)+16CO2(g)+18H2O(g) 0.290mol of octane is allowed to react with 0.600mol of oxygen.The limiting reactant is Oxygen. How many moles of water are produced in this reaction? After the reaction, how much octane is left?

Chemistry-Please help
A solution contains one or more of the following ions: Hg2 2+,Ba2+ ,Fe2+ and . When potassium chloride is added to the solution, a precipitate forms. The precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no precipitate. When ...

Chemistry-Please help
Find the percent by mass of sodium chloride in a 1.45M NaCl solution. The density of the solution is 1.05g/mol .

Chemistry
Hydrogen gas,H2 , reacts with nitrogen gas,N2 , to form ammonia gas,NH3 , according to the equation 3H2+N2-2NH3 How many grams ofNH3 can be produced from 2.90mol ofN2 ? How many grams ofH2 are needed to produce 13.75g of NH3 ? How many molecules (not moles) ofNH3 are produced ...

Chemistry-Please help
A student placed 11.0 of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-ml mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform...

Chemistry
Hydrogen gas, , reacts with nitrogen gas, , to form ammonia gas, , according to the equation 3H2+N2-2NH3 How many grams of are needed to produce 13.75g of NH3 ? How many molecules (not moles) of are produced from 8.26×10−4g of H2 ?

Chemistry
Hydrogen gas, , reacts with nitrogen gas, , to form ammonia gas, , according to the equation 3H2+N2-2NH3 How many grams of can be produced from 2.90 of ?

Chemistry
Which element is oxidized in this reaction? Fe2O3+ 3CO-(arrow)2Fe+3CO2

statistics
Use Bayes' theorem to solve this problem. A storeowner purchases stereos from two companies. From Company A, 250 stereos are purchased and 1% are found to be defective. From Company B, 950 stereos are purchased and 10% are found to be defective. Given that a stereo is ...

math
11,250

Ms. sue
it does not give me anything...

Ms. sue
Ms. Sue, is it a website or I need to google it.

Ms. sue
It has been a long time. need help on this: You have an assignment to write a research paper about the hiring practices at XYZ Mart, a large retail chain. Use the Internet to find five Web sites that you think will be appropriate to use for this assignment.

English
Can you help me with details for descriptive essay for the Eiffel Tower?

French
What's the difference between imparfait and passe compose?

French
Is il faut, like It's necessary? As in, il faut aller a l'ecole? Is it used in any other way?

physics
A baseball pitcher throws a ball with a maximum speed of 150. km/h. If the ball is thrown horizontally, how far does it fall vertically by the time it reaches the catcher's glove 20. m away? Give your answer numerically in meters using decimal notation (omit the units). ...

Chemistry
What is the chemical formula for quartz?

Chemistry
Thanks to bobpursley for answering my question.

Chemistry
Why would NAOH solution need to be added when preparing the K2CrO4 stock solution?

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