Friday
September 4, 2015

# Posts by nina

Total # Posts: 505

Statistics
What is the probability that we would obtain two sample means that differ by 1.875, when the SD of the sampling distribution is estimated at .125 when our sample has 8 subjects?
October 7, 2012

statistics
How is the standard error of the mean influenced by sample size and standard deviation?
October 6, 2012

math
how to solve a quadratic equation in one variable ? plsss
October 6, 2012

American History
okay i took the test and made a 100 some of my questions were different so ill just give the ones that are the same cause some are incorrect question 2 is b question 3 is d question 9 is d question 13 is c question 14 is d question 18 is c now like i said i took the and made a...
October 1, 2012

Geomatic Sequence
In a geomatic sequence, the seventh term exceeds the fifth term by 1920. Find the sum of the first eleven terms if the common ratio of the sequence is 2.
October 1, 2012

Arithmetic Sequence
Given the third term of an arithmetic sequence less than the fourth term by three. The seventh term is two times the fifth term. Find the common difference and the first term.
September 30, 2012

biology
What structure in the moss is like the spore case in ferns?
September 26, 2012

ECON 3
A manufacturer of television sets trims sets in either black or grey and uses either a walnut or a maple stain. A consumer survey showed that 20% of consumers wanted a black trim with a walnut stain and that half of all consumers wanted a black trim or a walnut stain. If it ...
September 19, 2012

ECON 2
False signals. A procedure has been designed that will detect 99% of the defective assemblies in a manufacturing process. However, the probability that the procedure will declare a good assembly defective is 0.05. If 2% of all assemblies are defective, what percentage of the ...
September 19, 2012

ECON
A bank vice-president declared that the probability that the bank’s funds were being embezzled was 0.70 and that the probability that an embezzlement would be discovered by the bank examiner was 0.90. Given that the bank examiner does not find the embezzlement and that ...
September 19, 2012

math
Yolanda is putting up a fence for her dog in the shape of a square. Each foot of fencing costs \$7. If Yolanda is planning to have each side of the fence be 10 feet long, how many feet of fencing will Yolanda need?
September 19, 2012

Scientific Question
Please help me check if I did my homework right base on a picture of picking strawberry farm. 1. Activity Investigation Picture Scientific Method: I. Perceiving the Problem Are these people a worker in a farm? II. Research a. Wearing different style of clothes b. Different ...
September 4, 2012

Maths
The population P of a particular city, Metropia, is growing at a rate proportional to the current population. The population at time t years is modelled by the equation P=Ae^kt where A and k are constants. With the aid of appropriate examples, explain how the growth of P over ...
July 30, 2012

Maths B - Population Growth
The population P of a particular city, Metropia, is growing at a rate proportional to the current population. The population at time t years is modelled by the equation P=¡¼Ae¡½^kt where A and k are constants. With the aid of appropriate examples, ...
July 30, 2012

Maths B question - population
The population P of a particular city, Metropia, is growing at a rate proportional to the current population. The population at time t years is modelled by the equation P = Aekt where A and k are constants. (a) With the aid of appropriate examples, explain how the growth of P ...
July 28, 2012

What does this Maths B question mean?
How do I do thi question? An example of a wine glass design, using three equations, is given below. The base of the wine glass is defined by a quadratic equation, the stem by a linear equation and the body of the glass by a square root function. The difficult part of the task(...
July 28, 2012

Explanation of Maths B Question
An example of a wine glass design, using three equations, is given below. The base of the wine glass is defined by a quadratic equation, the stem by a linear equation and the body of the glass by a square root function. The difficult part of the task(outlined on the next page...
July 28, 2012

Explanation of Maths Question
Can someone please explain what does these questions mean? Design a wine glass that uses at least 5 different equations to form the outline of the shape. At least half of your equations must be curves. It is easier if the design is done with the glass on its side, that is, ...
July 28, 2012

11 Maths B
Design a wine glass that uses at least 5 different equations to form the outline of the shape. At least half of your equations must be curves. It is easier if the design is done with the glass on its side, that is, with the axis of the design running along the x-axis
July 28, 2012

History
Discuss the differences and similarities in post-independence policies in India and Egypt. Please help me with this question If you could give me a little summary of each country it would be amazing. Its the only q I have left on this assignment.
July 23, 2012

oraintation
How will you apply these concepts in your educational, personal, or professional pursuits?
July 8, 2012

Science
1.The estimated doubling time for the black sea urchin population is approximately 1.5 years. What is the annual growth rate of the urchin? help please?
June 29, 2012

Chemistry
A student completes titration by adding 12.0 mL of NaOH(aq) of an unknown concentration to 16.0 mL of 0.15M HCl(aq). what is the molar concentration of the NaOH(aq)?
June 7, 2012

Social Studies
The last of Wilson's fourteen points called for
June 1, 2012

Chemistry
Thanks!
May 30, 2012

Chemistry
Find the molarity of [H+] and [OH-] in the following solutions: a) 0.050 molar NaOH b) 2.09g of calcium hydroxide in 100 mL of water c) 0.875 M H2SO4
May 30, 2012

Chemistry
That is super helpful, thanks. I missed a two days of class when we learned acids and bases, so I was a bit stuck.
May 30, 2012

Chemistry
100.0 mL Vinegar (d=1.06g/mL) contains 4% acetic acid. a. How many moles of acid are in 100 mL of vinegar? b. How many mL of 0.11 M NaOH are required to neutralize the vinegar?
May 30, 2012

Chemistry
Alright, sure. #9. 2H2O -> 2H2 + O2 15g H2O/1 x 1mol/18.02 = 0.832 mol H2O PV=nRT (98.9kPa)(v)=(0.832mol)(8.31 kPaxL/molxK)(290.2K) v=20.29L #11. 12.01g/gC x 100=49.48% 24.27gC/1 x 1mol/12.01g=2.02mol C 1.01g/gH x 100=5.15% 19.61gH/1 x 1mol/1.01g=19.42mol H 14.01g/gN x 100=...
May 30, 2012

Chemistry
Test corrections :) They're calculations/short answers. I'd just like something to compare answers to or help me get the full answer (all partial credits). Thanks! #9. When water is electrolyzed it produces hydrogen and oxygen. If 10.0% of 150.0g of water is ...
May 30, 2012

Chemistry
It's a molar heat reaction lab. 0.07g Mg Mg+2HCl->MgCl2+H2 What is the actual value for the heat of reaction based on the enthalpy's of formation? HfHCl= -118.53 kJ/mole HfMgCl2= -774 kJ/mole
May 15, 2012

A Stop Sign
is it an index, symbol or an iconic sign?
April 25, 2012

History
I'm doing a project on name change in south africa so I'd like to know why the name pretoria was changed to tshwane and why did they change it to tshwane??? and why Pietersburg was changed to polokwane and why did they change it to polokwane
March 21, 2012

Biology Science
Plankton, Fish, Crab, Shark. Plankton, Crab, Fish, shark. Depends on which fish and which crab. XD
March 5, 2012

english
There are many situations where one should say no. For example, imagine if a clumsy, crazy, annoying, creepy, stranger asks you on a date. Even though you don’t want to hurt his feelings just say no would this be an okay way to start?
March 4, 2012

english
I need ideas on how to start the paragraph.
March 4, 2012

english
I need help writing an illustration paragraph on the topic: saying no. I have to include the following devices 1 acyndeton, 1 polysyndeton, 2 interrupted movement, 2 parallel, 1 freight-train
March 4, 2012

I'm Studying For My Business Cycle Test and I'm finding it for hard to remember all the elements of the micro market and market environment so I was just hopeing someone could have like a catchy sentence for the elements in each environment e.g takeing the begining ...
March 4, 2012

writing
"Part 1: Write an exploratory essay in which you compare and contrast online learning with classroom (on-ground) learning. Your evaluation may include preparation time, rewards, pitfalls, etc. You may select the features that you want to compare and contrast. • Using...
March 2, 2012

math
What he did wrong is that William did not multiply the 1,000-gram by 1.
March 1, 2012

math
The 5th grade marching band includes boys & girls. There are 28 boys in a marching band. The boys are 7/10 of the students in the marching band. What fraction of students in the marching band girls? What is the total number of students in the marching band?
February 24, 2012

MATH
Carolyn and Kim are selling lemonade this summer.  It costs \$0.10 to make each cup of lemonade.  They are going to sell each cup of lemonade for \$0.25. What is the least number of cups of lemonade they need to sell in order to collect \$10.00 more than they ...
February 20, 2012

MATH
PLZZZZZZ! I NEED THIS ASAP
February 20, 2012

MATH
Carolyn and Kim are selling lemonade this summer.  It costs \$0.10 to make each cup of lemonade.  They are going to sell each cup of lemonade for \$0.25. a. What is the total cost to make 55 cups of lemonade? Show or explain your work.\$5.50 b. If they sell 55 ...
February 20, 2012

Writing
I'm Writing a Discursive Essay on the topic "is it more difficult to be a young person today then it was 50years ago", I have these main points: "we have technology but its brought us media pressue" "Better education system but with more pressue to...
February 19, 2012

I need Help!
An Example of where a difficult academic challenge would confront you in school? And how would you deal with it?
February 5, 2012

Math
List these numbers from least to greatest: 4 over 5,3 over 5,and 3 over 4 Please help me with a cherry on the top!!!
February 1, 2012

math
kevin says that 22 over 30 is greater than 22 over 32.Do you agree?Explain.
January 31, 2012

math
Explain how you can tell 26 over 100 is greater than 1 over 4????
January 31, 2012

Math
Which set of ordered pairs has point symmetry with respect to the origin (0, 0)? (5, 4), (-5, 4) (5, 4), (-5, -4) (5, 4), (5, -4) (5, 4), (4, 5)
January 17, 2012

math
Which set of ordered pairs has point symmetry with respect to the origin (0, 0)? (5, 4), (-5, 4) (5, 4), (-5, -4) (5, 4), (5, -4) (5, 4), (4, 5)
January 17, 2012

math
Two angles are complementary. One angle is twice the other. The largest angle has a measure of what. 120, 60, or 45
January 15, 2012

chemistry
December 16, 2011

chemistry
Hi I am in AP Chemistry and I did not take regulars chem so I have never done labs before and was wondering If anyone could give me examples on how to do a lab
December 16, 2011

Physics
help me, AP physics on part C!!!!!
November 27, 2011

chemistry
calculate 5.7 grams PbCl2= ions Cl-1
November 14, 2011

algebra
is the ordered pair a solution of the inequality? (6,15); 8y-9x>8
November 11, 2011

music
#26 Dikrayati #12 John Howatt #25 Mozart, Piano Sonata in A Major, No. 11 (K.331). (Use the Theme and first Variation only. Note that the first Variation has sounds of Turkish March Music. The first Variation ends when a rumbling bass stops at a cadence. This signals the close...
November 5, 2011

math
let w represent the number of words and m represent the number of minutes. Write a rule to show the relationship between w and m. 280 words in 8 mins
October 15, 2011

Physics help!!
109.6km/h
October 10, 2011

chemistry
C. 589
October 2, 2011

multiple regression
5. HR Assistant Survey A sample of HR assistants in Plano Texas was created. It was suggested that the data should be analyzed with a regression model to determine if salary was related to years of experience, aptitude test scores, EI (emotional intelligence)scores, number of ...
September 14, 2011

United States Government
The United States has this form of government. *representative democracy *monarchy *direct democracy *constitutional republic I think it may be D since a constitutional republic had a government with limited power where the people are the main government authority. But it ...
September 12, 2011

Foreign language
Mere baala dha tereeka vadhia heh.
August 30, 2011

The slant height of a regular pentagonal pyramid is 6 cm, and the length of each side of the base is 3 cm. Find the lateral area.
August 18, 2011

English
What does it mean " to get along you have to play along"?
August 18, 2011

What was the nature and extent of the Umayyad Empire? How did the Abbasid Empire differ from the Umayyad Empire? What were the achievements of the Arab phase of Islamic development ending in 750? I just want to know how they want me to answer these questions ie. examples.
July 2, 2011

4.What was the nature and extent of the Umayyad Empire?
June 30, 2011

Hi I need help with this What classical institutions survived the collapse of the classical civilizations and why? I just need help with knowing Romes institutions please help.
June 28, 2011

math
hi can you predict the next sequences possible from the numbers 1-50 05 16 20 30 41
June 27, 2011

Alright I just need help with this one What social structure did Confucianism imply? What were the key social classes, and how did they differ? What kind of social classes are they talking about political or religious??
June 24, 2011

What social structure did Confucianism imply? What were the key social classes, and how did they differ? Why did Confucianism have such a deep impact on Chinese and East Asian history? What groups and institutions could benefit from it? What does the document tell us about ...
June 24, 2011

Thank You so much Mrs.Sue this really helped.
June 24, 2011

Compare the political structure of Hellenistic Greece to that of the Greek world before 400 B.C.E. What was the function of philosophy in Greek culture? What, according to the authors, were the principles of Greek culture? Define a polis. How did the polis change between 800 ...
June 24, 2011

English-Native speakers
I think so.
June 23, 2011

Geometry Help!!!!!!!!!!
Thanks anyway but that isn't one of the choices the answer is x> 3/11 i figured it out thanks for trying :)
June 23, 2011

Geometry Help!!!!!!!!!!
If the sides of a triangle have measurements 3x + 4 , 6x - 1, and 8x + 2, find all possible values of x. I also need help with this question please
June 23, 2011

Geometry Help!!!!!!!!!!
In triangle ABC if m<ABF=39 and BF is an angle bisector, find <BCE
June 23, 2011

geometry
I am pretty sure it will form a scalene obtuse triangle. hope i helped out :)
June 23, 2011

AP World History
Thanks Mrs.Sue is there any way you can help with this one I want to find websites were i can double check my answer the question is How and where did Hinduism and Buddhism spread?
June 21, 2011

AP World History
3.Explain the major tenets of Hinduism and its evolution from the Aryans to the Gupta. Please help with this question I have no idea how to answer its the last one could you give me some websites please. -Thank You
June 21, 2011

Biology
You are a botanist hired in the future to make a distant planet, Xyloph, habitable for human life. Your job is to help seed the planet with plant life by working with the Terraforming Team. All four major kinds of plants will be introduced into this new world. You are to help...
June 12, 2011

chemistry
What kind of reaction occurs when a molecule of glucose reacts with oxygen to give carbon dioxide and water? a.exothermic reaction b.endothermic reaction c.synthesis reaction d.irreversible reaction
June 11, 2011

ALGEBRA
Explain how factoring is used to solve quadratic equations. Demonstrate the process with an example.
June 7, 2011

marketing
The process of naming broad product-markets and then segmenting them in order to select target markets and develop suitable marketing mixes is called:
June 5, 2011

Math
1 1/3 - 1 3/4
June 2, 2011

algebra 2
What is 36x^3-33x^2-33x-6/9x+3
June 1, 2011

Describe the development of the Chinese state and its political institutions. I really need help with this can somebody explain this to me.
May 31, 2011

Chemistry
How many moles of aluminum chloride can be produced if you start with 8 moles of aluminum and 9 moles of chlorine?
May 24, 2011

Megan Green is interested in taking out a personal loan for \$1,550. However, last year an identity theft scam left her with poor credit. Since then she has learned about the perils of identity theft from personal experience as well as from a variety of sources, including the ...
April 26, 2011

Ron Prentice bought goods from Shelly Katz. On May 20, Shelly gave Ron a time extension on his bill by accepting a \$5,000, 7.00%, 150-day note. On August 26, Shelly discounted the note at Roseville Bank at 8.00%. What proceeds does Shelly Katz receive?
April 26, 2011

what this the answer for this question We can conclude from paragraph a)theories are often revised. b)theories are never modified. c)theories are always changed. d)theories are mostly illogical. The concept that the Earth is a sphere can be traced back 2,500 years to the Greek...
April 19, 2011

science
i need to solve this : 1. we should show the chemical structure of oligosaccharide which contains 2 galactoses and 1 saccharose. 2. compare the difference in physical features og dicarboxylic acids and glucose beta chain 3. determine the calorific value of 5g saccharose please...
March 29, 2011

english vocabulary spelling
the_____ was a conflagration,causing serveral buildings great damage
March 23, 2011

Chem
Determine the maximum g of Ba3(PO4)2 that can be formed from your mass of Na3PO4 . 12H2O
March 23, 2011

math
how do I express these decimals as fraction in lowest terms? -9.8 and 1.6666666
March 15, 2011

Math
Clue 1: I am less than 1,000. Clue 2: the sum of my 2 digits is 26 Clue 3: my ones digit is 8 Who am I?
March 14, 2011

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