Tuesday
September 16, 2014

# Posts by David

Total # Posts: 1,641

Maths
Say the probability he'll pass English is Prob(E) = 0.6. The probability he'll pass in both English and Maths is Prob(E&M) = 0.54. Provided the probability that he'll pass English is independent of the probability that he'll pass Maths (and note that's an ...
May 2, 2011

maths
You're looking for an integer (I assume) between 11 and 19 inclusive: that comes from the first statement. So try multiplying each of 11, 12, 13, 14, 15, 16, 17, 18 and 19 by 6, and look at the final digit. If it's an 8, that's a possible solution. Of the above, 13...
May 2, 2011

math
I'm going to rewrite the question to make sure I've understood it. In 4a and 4c there are the same number of girls. There are 56 pupils in total in the two classes. If 1/3 of the people in 4a and 1/4 of the people in 4c are girls, find the total number of girls in both...
May 2, 2011

Math/Statistics
Though strictly speaking the question ought to read "What is the probability of a random dart that hits the dartboard landing inside the bullseye?". A truly "random" dart could easily miss - and that would make the probability uncalculatable without extra ...
May 1, 2011

math
Assuming this is a calculus question and not a graphical one, you need to solve a simple differential equation in d: h = 2d - (d^2)/5, so dh/dd = 2 - 2d/5 = 0 at the maximum, so d=5. But at d=5, h= 2*5 - (5^2)/5 = 10 - 5 = 5. So the maximum height is 5 feet. Not very high, is ...
May 1, 2011

Chemistry
1How would each of the following affect the accuracy of the calculated neutralizing power of antaid (too high, too low, no effect) explain a)The actacid tablet was not cut exactly in half before weighing b)The solution mixture of reacted antacid and excess HCL spattered out of...
April 26, 2011

phi
Catherine goes to her local movie theater only to see romantic comedies. Since Catherine did not go to the movies yesterday, there is not a romantic comedy playing at her local theater. The reasoning above is flawed because the evidence
April 24, 2011

physics
What is the acceleration due to gravity 100km above the surface of the Earth? (Average radius of Earth is, Re=6.4x10^3km)
April 24, 2011

physics
A ball is thown at 20m/s at an angle of 30 degrees from the horizontal level. What maximum height can the ball reach?
April 24, 2011

physics
a cetrifical force of 98N is acted upon a 5kg. ciculating object. If the object is moving at a radius of 1.2m ,what speed is needed to keep it in the cicular motion?
April 24, 2011

physics
At what speed should an object be projected to reach the maximum range of 200 m ?
April 24, 2011

algebra
1st Step Have each each scenario equal each other 120 + .40x=230+.35x x-2200 For all amounts over 2200 plan be will save her money
April 21, 2011

algebra 1
suppose triangle ABC has right angle C. find the measures of the other sides to the nearest whole number. measurement of angle A is 40 BC is 5
April 20, 2011

accounting
Shott Farm Supplies Corporation purchased 800 shares of General Motors stock at \$50 per share and paid a brokerage fee of \$1,200. Two months later, the shares were sold for \$53 per share. The brokerage fee on the sale was \$1,300.
April 20, 2011

Maths and Physics
Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 (10 marks). Kind Regards
April 19, 2011

architecture
the best way to describe classical Greek art would (paragraph) example would include the statue
April 16, 2011

Math
A rooming house has three rooms that contains four beds, three beds and two beds respectively. In how many ways can nine quests be assigned to these rooms? The book says it is 1260. I have no idea how they got this. I know it requires combinations. Could someone please explain...
April 16, 2011

Math
Without graphing, identify the quadrant in which the point (x, y) lies if x > 0 and y < 0.
April 13, 2011

Math
You are designing a rectangular playground. On your scale drawing, the vertices of the rectangle are (10, –9), (10, –3), and (13, –9). What are the coodinates of the fourth vertex?
April 13, 2011

algebra
How can I justify each step 1/2x =15 2(1/2)x = 2*15 x =30
April 13, 2011

math
The lengths of what are considered "1 inch bolts are found to be normally distrubted with a mean of 1.001 inches and a standard deviation of 0.002 inches. If a bolt measures more than 2 standard deviations away from the mean, it is rejected for not meeting factory ...
April 12, 2011

science
Table salt has a solubility of 36 g of salt in 100 g of water at 40°C. If 15 g of the salt are added to 50 g of water at the same temperature, is the resulting solution saturated or unsaturated? Explain your answer.
April 11, 2011

one thousand forty four dollars
April 11, 2011

Math
What will the graph look like for the equation y= 2x^2 + 3
April 9, 2011

Chemistry
In a decomposition reaction 2KCLO3 -> 2KCL + 3O2, what volume of O2 gas at STP would be produced from 3.66g of KCLO3 Thank You very much for your help :)
April 6, 2011

chemistry
In the reaction N2 + 3H2 -> 2NH3, how many grams of NH3 gas would be formed when H2 gas, having a volume of 11.2 liters at STP, reacts with excess N2 gas? Completly confused, thank you very much for your help :)
April 6, 2011

Algebra
Hello. I am trying to figure out how to find the number of solutions in the following problem: (x + 8) (x + 8) = 0
March 28, 2011

History
What did the 1968 march at the Chicago Democratic Convention prove? Was there any good that came out of this situation for all of those involved, our country and the war in Vietnam? Did Arfrican Americans and other minorities achieved anything benefical from 1968?. During 1968...
March 25, 2011

History
What defense strategy was developed by the late 1940s because the US lacked sufficient troops to confront the Soviet Army in Eastern Europe? I think that the answer might be= B) nuclear deterrence, is this correct? A) atomic detente B) nuclear deterrence C) a combined NATO ...
March 23, 2011

history
I think the correct answer is B) nuclear deterrence, is this correct?
March 23, 2011

history
What defense strategy was developed by the late 1940s because the US lacked sufficient troops to confront the Soviet Army in Eastern Europe? A) atomic detente B) nuclear deterrence C) a combined NATO army D) French and German rearmament
March 23, 2011

History
What were the protestors so unhappy about? The protestors opposition to the Vietnam War dominated the protests, students also protested for civil liberties, against racism, for feminism, and the beginnings of the ecological movement can be traced to the protests against ...
March 23, 2011

History
In 1968 Democratic Convention in Chicago. What were the protestors so unhappy about?
March 23, 2011

Finance
Suppose \$500 is invested monthly at 4% compounded monthly, for 10 years, then \$600 is invested monthly at 6% compounded monthly, for 10 years.
March 21, 2011

History
My instructor requested that I write a reflective prep paper for my final essay. Will I use words like (I, me, myself or personally) when referring to myself in a reflective essay? What words do I start the thesis statment with in a reflective essay? My instructor wants me to ...
March 21, 2011

History
Does any know how the American public felt about what happen to the Japanese American internment issues. I know how the American Japanese felt however I cannot find any express opinions of the American public.
March 20, 2011

Algebra
Well, I'm trying to find two different points by changing the x value since I need to graph these points and then reflect it. I hope this helps you a little.
March 19, 2011

Algebra
Hello. I am trying to solve quadratic functions but I'm having difficulty understanding. Here is my work so far... y=3x^2 + 12x + 9 12/6 = -2 = y 3(-2)^2 + 12(-2) + 9 = -3 x=0 y=9 (0,9) Would I just plug in 1 and 2 for x and then reflect it while i'm graphing? So, if I...
March 19, 2011

history
I read up on most of the information concerning this subject, and I still need help. Japanese Internment When President Roosevelt issued Executive Order 9066 on February 19, 1942, he authorized the evacuation of Japanese-Americans from the West Coast. Why was this done??? Was ...
March 19, 2011

history
The automobile facilitated the idea of worshipping at the altar of materialism. The development of the automobile helped to change the American culture by allowing individuals another avenue to show wealth and treasure it, two critical elements of the New Era. Could someone ...
March 18, 2011

History
Can some please help me with this question? 7. Which statement is most accurate regarding the miracle of war production? Here are my choices War production depended on the conversion of peacetime industries, so overall economic output grew very little (A) Both corporate ...
March 18, 2011

Physics I
I have this vector that is confusing me I know what I need to do but the components of these vectors are confusing me. Problem: You are standing at point with coor dinates (1m, -1m, -2m) another erson is at r(t)=(8m)i - (3m/s^3) t^3 j + (4m/s^2) t^2 k Find distance between you...
March 18, 2011

History
Thank you.
March 17, 2011

History
My question was pretaining to the culture of the 1920's. I need to the question answered in what ways did the automobile change American culture during the 1920's? Henry Ford came out with the Model T and how was he able to succeed to a degree far beyond any other ...
March 17, 2011

history
My question was pretaining to the culture of the 1920's. I need to the question answered in what ways did the automobile change American culture during the 1920's? Henry Ford came out with the Model T and how was he able to succeed to a degree far beyond any other ...
March 17, 2011

History
Thank you
March 15, 2011

History
The results of the 1912 election prove that Americans were ready for change and reform across the board. Each candidate offered their own view on how changes should be implemented and which issues needed change, ultimately the voters showed they wanted an end to political ...
March 15, 2011

History
The results of the 1912 election prove that Americans were ready for change and reform across the board. Each candidate offered their own view on how changes should be implemented and which issues needed change, ultimately the voters showed they wanted an end to political ...
March 15, 2011

math
In a movie theater, Theater A has 30 seats in the first row. Each next row has 4 more seats in it than the previous row has. 1) How many seats are in the 4th row? 2) Is there a row with exactly 60 seats in it? Explain. 3) Theater B has 40 seats in the first row and each row ...
March 14, 2011

History
Is this true or false. If it is true were can I find the web site to verify the answer. I am having a difficult time interputating what the statement is trying imply. Please could you help me. Thank you. American colonies were born out mass slaughter of native Indians and ...
March 13, 2011

History
Since the late 1800's and the 1912 eara how has the progression reform movement effected how things are presently?
March 13, 2011

History
I would like to thank you both for your informative answers to my question. I will be sure to check out the article on the web site that you have provided as well. Now I am no longer confused as to what the statement really meant. Thanks again!
March 12, 2011

History
Can someone please explain what this statment means when it worded like this? (I tried to figure out what it means, put I keep getting confuse). That the 1912 election registered, and inspired, fundamental changes in American politics suggests the historical significance of ...
March 12, 2011

History
You are correct, I have not recently heard of anyone who states that the working class should be the ruling class. I wish that were true, maybe then, the high unemployment situation that we are presently dealing with would improve! Thannk you
March 11, 2011

History
The election of 1912 Eugene Debs espoused a view of labor equality and socialism. He argued for a transformation that would make “the working class the ruling class”.*** That seemed to have been the position of Lenin, Stalin, and other Marxist leaders. Is it possible...
March 11, 2011

history
The Progressive Era (1890-1920) What does the outcome tell us about the way americans of the time felt about progressive reform movements?
March 10, 2011

english
Do all essays require a thesis
March 9, 2011

Economics
List the various causes of inflation and determine if they are an injection or a leakage. Demand-pull theory: This is a leakage. If all sectors in the economy try to buy more than the economy can produce, people may start to rely on imports. Therefore, demand-pull is a leakage...
March 8, 2011

History
Can someone please help me with these questions? Thanks What issues did each of the four 1912 presidential candidate espouse? ... Woodrow Wilson, William Howard Taft, Theodore Roosevelt, Eugene Debs
March 7, 2011

History
In the 1912 presidental campaign what issues did William Howard Taft espouse on? Thanks
March 7, 2011

History
Can someone please help me with these four questions? My first is to discuss a little about American Imperialism in the Nineteenth Century. My second question, why was this policy adopted? My third question, how was it rationalized? My fourth question is to discuss the major ...
March 6, 2011

History
I have this one question that is giving me some trouble trying too figure out. Could one please help me with this one question. Before 1802, most immigrants came from ____________; after 1802, most immigrants came from ______________. My choices are: The European continent; ...
March 5, 2011

chemistry
In simple terms, a standard solution is a solution with a concentration that you know, example is a container labelled 1M, it means the content is a standard solution. An indicator is used to find when the acid and base are completely neutralized in titration
March 5, 2011

ENGL
I am working backwards I think Question 3 is 3) A is dependent and B is dependent 2) A Dependent B Independent 1) A Independent B Dependent
March 3, 2011

ENGL
These three questions I am having difficulty in solving. Can you help me here. Question 1 - a) Whenever children in the United States turn on the tv, B) they are more likely to encounter violence on the screen. A is an independent clause. A is a dependent clause B is an ...
March 3, 2011

Economics (SraJMcGin)
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a cost over run of 10% could be dumped in Canada. Given the law of demand, what would happen to the Canadian company? If you worked for that company, what...
March 3, 2011

biology
If you inject carbon nanotubes into the body, can we produce antibodies against it? some ideas: - my answer is yes and no... the carbon nanotubes are too large for the t-cell to destroy it; therefore, they won't have an affect. -plus our whole body is made of carbon; ...
March 3, 2011

Economics
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a cost over run of 10% could be dumped in Canada. Given the law of demand, what would happen to the Canadian company? If you worked for that company, what...
March 3, 2011

Economics
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a cost over run of 10% could be dumped in Canada. Given the law of demand, what would happen to the Canadian company? If you worked for that company, what...
March 3, 2011

History
Hi Sue, The freedom that happen in the late 1800's.
March 2, 2011

History
Black southerners sought respect, land, and the rights of citizenship. What did freedom mean?
March 2, 2011

Economics
Are these examples of elastic/inelastic supply products correct? Plane tickets: A plane ticket is an example of inelastic supply. If the price of a ticket changes, the airline cannot quickly increase the supply of seats. It takes a long time to make more planes to provide ...
February 28, 2011

Physics
In an experiment conducted by Young using sodium light with λ=589 nm, the slits are 1 μm wide. You notice that every fourth fringes missing. a) What is the slit separation? d = na = 4(1 μm) = 4 μm. b) How many fringes appear on the screen? I'm not sure ...
February 28, 2011

finance
Adams Enterprises’ noncallable bonds currently sell for \$1,120. They have a 15- year maturity, an annual coupon of \$85, and a par value of \$1,000. What is their yield to maturity?
February 27, 2011

Math
What's the function? x= 2, y=14 x=10, y=54 x=8, y=44 x=?, y=34 x=?, y=104 x=?, y=31 I thought it was multiply by 5, add 4 but that won't work for the last one where y=31. Help!
February 27, 2011

Math
Thank you very much!
February 27, 2011

Math
Could someone please help me to identify what type of misrepresentation or misuse have demonstrated by the statement below. Here are choices only one of them connects with this statement: Which one? “…male children born to women who smoke during pregnancy run a risk ...
February 27, 2011

Math
Thank you so much
February 26, 2011

Math
If a student's percentile rank in a class of 400 students is 87, how do I find the student's class rank.
February 26, 2011

managerial economics
draw me an indifference curve where someone does not value integrity very much compared to income
February 24, 2011

Economics
If all the wealth in the world were distributed evenly, how much money would each person have? How would this affect the everyday lives of westerners? Thanks for your help. Any references would be appreciated.
February 24, 2011

Economics
If all the wealth in the world were distributed evenly, how much money would each person have? How would this affect the everyday lives of westerners? Thanks for your help. Any references would be appreciated.
February 24, 2011

Physics
Doubling the voltage across a parallel plate capacitor does not double which of the following? a. the charge b. the electric field between the plates c. the energy stored d. the electric force on the plates e. both a and b is the answer A if not then how do i do this problem
February 23, 2011

physics
How much potential energy does a 60kg skater have before she starts her ride, 12m above the ground?
February 20, 2011

Social Studies
Explain the similarities and differences in the way the US and Canada gained independence
February 20, 2011

physics
-6.93*10^-5 N/C
February 19, 2011

english
i guess its great to watchh:) this movie gives us great messages! thanksss
February 15, 2011

english
should the film "Speak" be studied in english 9?Why? "Speak"by Laurie Halse Anderson
February 15, 2011

math
26 1/4- 5 3/10
February 13, 2011

Math
The area of a rectangular playground is 2,700 ft2. The length is 3 times the width.What are the dimensions of the playground?
February 13, 2011

chemistry
Fish-liver oil is a good source of Vitamin A. When 0.1232 g of fish liver oil is dissolved in 500. mL of solvent, an absorbance of 0.724 is recorded. When 0.00167 g of Vitamin A is dissolved in 250. mL of solvent, an absorbance of 1.018 is recorded. Calculate the mass percent ...
February 8, 2011

chem
Fish-liver oil is a good source of Vitamin A. When 0.1232 g of fish liver oil is dissolved in 500. mL of solvent, an absorbance of 0.724 is recorded. When 0.00167 g of Vitamin A is dissolved in 250. mL of solvent, an absorbance of 1.018 is recorded. Calculate the mass percent ...
February 7, 2011

Physics
An electron (mass m = 9.11e-31 kg) is accelerated in the uniform field E (E = 2.00e4 N/C) between two parallel charged plates. The separation of the plates is 1.10 cm. The electron is accelerated from rest near the negative plate and passes through a tiny hole in the positive ...
February 6, 2011

Algebra
(-6,-5/2)and(-5/2,infinity)
February 3, 2011

chemistry
All I know is, nitrogen in fertilizer can embed the water table and change the pH, which then becomes toxic as it reaches the Gulf (In the US). Might start with that.
February 3, 2011

Science
1.08x10^21 atoms in 1%(w/v) aqueous KOH 1.63x10^21 atoms in 1% (w/v) aqueous HCL I would say more particles "in" the base, than particles "in" the acid.
February 3, 2011

Math
Refer back to Week One Discussion and use the names and ages of yourself and the other two people you selected. Make sure one is older than you and one is younger than you. In years, how old was the older person when you were born? Write an equation that models how old in ...
February 3, 2011

math
-2x-15=30
January 31, 2011

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