Questions Asked on
February 7, 2008

statistics
One test for ESP involves using Zener cards. Each card shows one of five different symbols (square,circle,star,cross,wavy lines), and the person being tested has to predict the shape on each card before it is selected. Find each of the probabilities
asked by cindy 
Chemistry
Concentrated aqueous ammonia contains 1.00 mol NH3 dissolved in 2.44 mol H20. What is the mole fraction of NH3 in concentrated aqueous ammonia? What is the molal concentration of NH3
asked by Lauren 
Chemisty
A solution contains 0.0653g of compound in 8.31g of ethanol. The molarity of the solution is 0.0368m. Calculate the molecular weight of the compound
asked by Lauren 
statistics
The distribution of scores on the SAT is approx. normal with mu= 500 and std dev=100. a)what proportion of the population have SAT scores above 650? b)what proportion of of the population have SAT scores below 540? c)what is the minimum SAT score needed to
asked by Tommy 
physics
A 180kg crate is sitting on the flatbed of a moving truck. The coefficient of sliding friction between the crate and the truck bed is 0.30. Two taut cables are attached to either side of the crate. Each cable can exert a maximum horizontal force of 650 N
asked by Dorothy 
Chemistry
What is the vapor pressure at 23 degree C of a solution of 1.20g of naphthalene, C10H8 in 25.6 g of benzene, C6H6? The vapor pressure of naphthalene can be neglected. Calculate the vaporpressure lowering the solution
asked by Lauren 
Chemistry
Citric acid H3C6H5O7, occurs in plants. Lemons contain 5% to 8% citric acid by mass. The acid is added to beverages and candy. An aqueous solution is 0.688m citric acid. The density is 1.049 g/ml. What is the molar concentration?
asked by Lauren 
Reading
why is charlie so well behaved during a tour of the chocolate factory? From Chapters 2430 in Charlie and the Chocolate Factory?
asked by Anonymous 
managerial economics
After two quarters of increasing levels of production, the CEO of Canadian Fabrication & Design was upset to learn that, during this time of expansion, productivity of the newly hired sheet metal metal workers declined with each new worker hired. Believing
asked by jean 
science
whats the term? 1)the turning of air masses from their original paths because of earth's rotation 2)high altitude winds that occur in places where trade winds and polar easterlies meet prevailing westerlies
asked by synester 
Math
Find the percent of change from $48 to $53.76. State whether the change is an increase or decrease.
asked by Brandon 
Probability/Statistics
1)Two marbles are chosen at random from a bag containing 3 blue and 2 red marbles. The relativefrequency histogram shows the distribution of the number of red marbles chosen. Find P(0 red). (the gragh shows 3/10 for 0 red, 3/5 for 1 red, and 1/10 for 2
asked by Jon 
Chem help?
In an experiment 5.57 +/ 0.02 grams of water chemically decomposes into the products hydrogen gas and oxygen gas. The measured mass of oxygen gas produced in the reaction is 4.9320 +/ 0.0001 grams. The hydrogen gas occupies a volume of 6902 mL. Report
asked by sool 
science help Please
There are 3.29g of Iodine 126 remaining in a smaple originally containing 26.3 g of iodine 126 the half life of iodine 126 is 13 days. How old is the sample?
asked by sam 
physics
A single uranium atom has a mass of 3.97 x 10^25 kg. It decays into the nucleus of a thorium atom by emitting an alpha particle at a speed of 2.10 x 10^7 m/s. The mass of an alpha particle is 6.68 x 10^27 kg. What is the recoil speed of the thorium
asked by Dorothy 
CHEM!!
In an experiment 5.57 +/ 0.02 grams of water chemically decomposes into the products hydrogen gas and oxygen gas. The measured mass of oxygen gas produced in the reaction is 4.9320 +/ 0.0001 grams. The hydrogen gas occupies a volume of 6902 mL. Report
asked by HELP!! 
Math
Find the equation of the tangent line 5x^2+y^2=14 at (1,3). P.S: It's calculus. So far I know this much 10x+2y(dy/dx)=o 10x 10x ___________________ 2y(dy/dx)= 10x (dy/dx)= 10x/2y= 5x/y m= 5(1)/3= 5/3 y=mx+b 3= 5/3(1)+b then what?
asked by Skye 
Math (ratios)
At a certain college, the ratio of the men to women is 5:4. If there are 2800 men, how many women are there?
asked by Reese's 
Chemistry
Citric acid H3C6H5O7, occurs in plants. Lemons contain 5% to 8% citric acid by mass. The acid is added to beverages and candy. An aqueous solution is 0.688m citric acid. The density is 1.049 g/ml. What is the molar concentration?
asked by Lauren 
Chemistry
A solution was prepared by dissolving 0.817g of sulfur S8, in 100.0g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution
asked by Lauren 
world history
what is the term for the policy of qvoiding conflict that the the United States had originally pursued during the war that was based on the belief that the country should maintain a limited involvement in world affairs while trying to broker a peace?
asked by Seth 
physics
A 62kg boy on a 1.50kg skateboard moving at +1.2 m/s steps off and lands on the sidewalk with a velocity of +1.1 m/s. How fast is the skateboard moving?
asked by Dorothy 
Earth Science
What is the primary cause of surface currents?
asked by Julian C 
story problem
The mass of Pluto is about 1.31 x 10^19 metric tons. The mass of the sun is about 1.998x10^27 metric tons. About how many times the mass of Pluto is the mass of the sun? Give answer in scientific notation. Is this correct? 1.53x10^8
asked by becky 
Essay (again)
Assess America's contribution to the Allied victory in World War I. Do you think that the US's involvement was crucial to victory? Why or why not. I am not really looking for anyone's specific opinion, just websites that will give me the info i need to
asked by Christie 
social studies
What are mummyshaped figures that worked in the afterlife's fields for the mummy?
asked by christy 
chemistry
1.92g sample of hydrogen peroxide solution generates 37.8mL O2 at 759 torr and 35 C. What is the percent strength of the peroxide solution? how would you solve this problem and which equations would you use?
asked by anna 
Chemistry
Urea (NH2)2CO is dissolved in 100.0 g of water. The solution freezes at 0.085 degrees C. how many grams of urea were dissolved to make this solution.
asked by Lauren 
us history
why did united states policy makers feel the need to secure new markets abroad in the late 1800s? what risks did the united states take in attepting to find new foreign markets? why did the american public favor war with spain what impact did teddy
asked by mike 
Math
During peak season, a hotel room costs $135 per night. During the offseason, it costs $90 pernight. Find the percent of change from peak season to offseason.
asked by Brandon 
8th grade math
Your uncle is three years older than your aunt. The product of their ages is 3190. What are their ages? I know the answer is 55 and 58. But I can't come up with the correct formula or equation to get the answer. I've tried 3(A+3)=3190. It doesn't come up
asked by KL 
math
find the equation of the line containing the points (2, 3) and has a slope perpendicular to the line 3x5y+6=0
asked by cyrus 
Accounting
Burrand Company estimates that annual manufacturing overhead costs will be $600,000. Estimated annual operating activity bases are: direct labor cost $500,000, direct labor hours 50,000, and machine hours 100,000. Compute the predetermined overhead rate
asked by jimmy 
Science
A CHILD IS BORN ON EARTH IN 2000. yOU ARE 94.6 TRILLION KILOMETERS AWAY FROM EARTH AND YOU SEE THE CHILD'S 3RD BIRTHDAY. HOW OLD IS THE CHILD AT THE TIME OF THE CHILD'S 3RD BIRTHDAY?
asked by Chelsee 
SCIENCE
ARE ANY OF THE 9 PLANETS WITHIN OUR SOLAR SYSTEM A LIGHT YEAR OR MORE AWAY FROM EARTH?
asked by Chelsee 
jean
what are the advantages and disadvantages of program budgeting systems. would it be that the money can only be spent on programs within the organizations and nothing else?
asked by financial management 
environmental sciecen
what are pheromones and what is a lie fallow
asked by cassie 
Algebra
1)An ice cream store has 31 flavors of ice cream and 10 toppings. A regular sundae has 1 flavor of ice cream, 1 topping, and comes with or without whipped cream. How many different ice cream sundaes can be ordered? A)310 B)372 C)620 D)82 I chose C 2)How
asked by Jon 
statistics
(population) A normal distribution has a mean of 80 and a std dev of 20. For each of the following scores, indicate wheter the tail of the distribution is located to the right or left of the score, and find the proportion of the distribution located in the
asked by Shane 
Physical Science
Hello, I wanted to know in this problem if I came to the correct answer... Thank You I used: Vo/To = Vf/Tf A quantity of gas has a volume of 0.20 cubic meter and an absolute temperature of 333 degrees Kelvin. When the temperature of the gas is raised to
asked by Mandi 
microeconomics
Use the following to answer questions 13: 1. Refer to the above diagram. If demand changes from D1 to D2 at the same time supply changes from S2 to S1, equilibrium price will: A) rise and equilibrium quantity will fall. C) rise, as will equilibrium
asked by Erika 
algebra
Mrs Lee was given $1200 every month for the household expenses.She used 17/24 of it to buy food for the family, 5/7 of the remainder for clothes and other expenses.She put the remaining money into the bank as savings for the family.Find the amount she put
asked by MTH 
algebra
40x^856x^4+24x divided by 8x Is this correct? 5x^77x^3+3
asked by becky 
Math
If an item costs $179.99 and it is marked 25% discount, what would the sale price be?
asked by Brandon 
algebra I
If you toss a coin, the probability of gettig heads is 1/2. If you toss a coin 2 times. the probability of getting heds each time is 1/2*1/2 or (1/2)^2. Write an expression to represent the probability of tossing a coin 'n' times and getting 'n' heads.
asked by Joanne 
algebra
(x^613x^3+42)divided by (x^36) Is this correct? x^37
asked by becky 
spell
please help with essay am new and need advice Most people believe that America waged war against Iraq in March of 2003. But the truth, unannounced to many, is that America, along with Britain, had already planned to destroy Iraq twelve years before the war
asked by kory 
statistics
a sample of n=25 scores has a mean of M=60 and a std dev of s=12. Find the zscore corresponding to each of the following scores from this sample. X=66,X=48,X=84,X=55
asked by annabelle 
2008 presidenta election
Which state primaries award delegates in proportion to their percentage of the vote? How does it end up that Alaska has more delegates than Connecticut?
asked by skye 
algebra
Divide and simplify 6^6/6^3 Would the answer be 216 or 6^3?
asked by becky 
Year 12 can't do year 7 simple mathhelp
brothers homework question, he is up set and even i can't do, seams simple, but i just am not getting it. "If 2*6=4, 4*1=7 and 8*3=1, find the value of 5*5." thanks guys
asked by Jimbo 
Discrete Math  Geometric Vectors
I'm lost! How do you add the following vectors? Please provide a step by step answer! 1) EA  CB + DB + AD 2) PT  QT + SR  SQ
asked by Anonymous 
chemistry
what is the molecular structure around oxygen in water?
asked by johnny 
chemistry
Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C . Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)
asked by Anonymous 
Biology
What are 5 adaptations that can help placental mammals survive in their environment?
asked by eva 
algebra
how do i verify a question when i am solving for Y.. yet i need to subsatoute X first to find Y. such as in this probelm to find Y ((xy)/(x+4)(2y/x)=3 solve for Y i end up with........lets say that X=4 Y= (3x^2+12x)/(x^22x+8) Y=6 now how am i supposed to
asked by breanna 
chem
The concentration unit used in Raoult's Law calculations is???
asked by miley 
Science
should there be more or less exploration and mining on public lands in the united states?
asked by Stacey 
AED 200
Audience recognition Terms for different audience levels Issues of diversity Multiculturalism Issues of sexist language • Explain how these audience characteristics will impact your technical writing process as well as how you will adapt a technical
asked by Dawn 
physics
An air filled parallel plate capacitor has plates of area 0.0406 m^2 and seperation of 2.5*10^6 m. a)What is the capacitence for the setup? b)Our capacitor is connected to a 550 v battery, how much energy is stored in the capacitor? c) If 1 mJ of work is
asked by jenish 
managerial economics
Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimate that in mass production the car would cost $40,000 per unit to build. The engineers argued that
asked by jean 
Biology
Could i pls have an answer to this question:5 adaptations that help placental mammals survive in their environment?
asked by eva 
algebra
x cubed + x squared over x squared  16 times x + 4 over 3x to the fourth power + x cubed  2x squared. i got x + 1 over (x4) (x+1) (3x+2). is this correct?
asked by anonymous 
Math
To gather enough nectar to make 1 pound of honey, a bee must visit 2 million flowers. How many flowers must a bee visit to make 64 ounces of honey?
asked by Jake 
algebra
(1.6x^3+4.7x^23.8x)(4.3x^34.4x^2+55) Is this correct? 5.9x^3+9.1x^23.8x55
asked by becky 
algebra
(7x+3)+(4x^2+1/2x10) onehalf Is this right? 8x^213x14 divided or over denominator 2
asked by becky 
algebra
Simplify 1/9^4 One divided by 9^4 Directions say to simplify answer and type an integer or a fraction. Is 6561 correct?
asked by becky 
algebra
Multiply (72x^4)^2 Is this right? 36(2x^4+7)
asked by becky 
Physical Science
Hello, Can some one please tell me if I calcilater this right... Thank You I used: I=LK1(TfTo) What is the length of an aluminum rod at 65 degrees celsius if its length at 15 degrees celsius is 1.2 meters? my answer: 0.001386 meter
asked by Mandi 
Physics
Lithium is the atom which has three protons in its nucleus and three electrons circling the nucleus.(it usuallly has 3 nuetrons as well,but they r not important in this problem.)Two of the electrons circle the nucleus at a distance 1.8* 10^11 m (app.)The
asked by jenish 
geometry
What is the hypotnuse of a triangle if the legs are 9 radical 5?
asked by Meli 
Calculus
f(x)=x^2x+3 , n=6 , a=0, b=3 find LRAM, RRAM, and MRAM for x is greater than or equal to a or less than or equal to b
asked by Will 
spell
Is Cloning Right or Wrong? The lamb has always been a symbol of innocence. This changed abruptly in the spring of 1997. "Dolly," a barely threemonthold sheep, hit the headlines, displacing politicians and pop stars from the front pages of newspapers and
asked by welker 
algebra
x+3 over x cubed  x squared 6x divided by x squared 9 over x squared + x 12. i got x + 4 over (x squared + 2x)(x3). am i right?
asked by anonymous 
Chemistry
Write the formula for each Ionic compound. *barium nitrate
asked by AnnaMarie 
Math  Statistics
What is the inverse of a factorial and how would i calculate it. E.g. 60000 = n! How would i get n?
asked by Danielle 
Algebra
How do I solve this: 3 n  +  =2 8 4
asked by Jeremy 
world history
The British and French wanted U.S. units sed to reinfore their troops already on the battle lines. Who was the general chosen to command the American Expeditionary Force in World War I that refused to break up U.S. units so that they could be used as
asked by Roderick 
persian literature
please help me find the works of hafiz, jami, sadi (persian poets)... what are their basic reasons in doing in their works...
asked by klar maesen 
geometry
How do you solve this problem? 2x squared = 169?
asked by Meli 
critical thinking
How can a person disting between prejudical and nonprejudical use of rhetorical devices?
asked by sue 
SCIENCE
ON A PLANET IN THE YEAR 2000 YOU ARE OBSERVING AMERICA'S BICENTENNIAL CELEBRATION IN BOSTON, MASSACHUETTS. HOW MANY LIGHT YEARS AWAY ARE YOU FROM EARTH. HOW FAR ARE YOU IN KILOMETERS
asked by Chelsee 
Spanish
Can someone help me translate this please. Thanks Un millonario de doce anos! La semana pasada, el joven Roberto Ruiz descubrió un tesoro en una casa abandonada. Este tesoro consiste en dos mil monedas de oro antiguas. Muerte de un anciano simpático Ayer
asked by John 
Physical Science
Hello, Can you tell me if I have the correct answer? Thank You How much heat is required to convert 0.3 kilogram of ice at 0 degrees celsius to water at the same temperature? My answer: 100,375 J
asked by Mandi 
spanish
can someone translate this for me? or help me translate it... lol. plz and ty :) Mi hermana somos altos. [theres a mistake and im supposed to find it and correct it, so plz just tell what it actually says]
asked by mandi 
history =P
what are the threee major categories of rights?
asked by tracie 
algebra
I still don't get it when i go back to the original and use X=4 to solve for y and then end up with Y=0 what am i supposed to do next
asked by breanna 
algebra
Factor by grouping 5x^35x^2x+1 Would it be? (x1)(5x^21) or (5x^21)(x1) Usually the answers are in descending order.
asked by becky 
criminal justice
What communication barriers would a police officer and a prison guard may face when communicating with one another or with their clients? What are some possible strategies to overcome these barriers?
asked by Ree 
algebra
Factor: check by multiplying x^26x Is this correct? x^2(x5)
asked by becky 
spell
plz sort these words into the suffixs' ary and ate: unfortunate approximate momentary imaginary immediate temporary customary desperate secondary necessary accurate voluntary delicate solitary ultimate moderate ordinary honorary fortunate desolate
asked by anomous 
spell
continued... What comes to mind when you think of wealth? An enormous mansion? Piles gold, silver, and diamond jewelry? Millions of dollars? Well in America’s case, wealth is in the rise of the U.S. dollar. “After control of the oilfields the next
asked by kory 
Biology
How does being tall give plants an advantage?
asked by Sara 
Physical Science
Hello, I wanted to know if I came to the correct answer in the following problem... Thank You I used: I=LK(ToTf) LD=LI A silver bar 0.125 meter long is subjected to a temperature change from 200 degrees celsius to 100 degrees celsius. What will be the
asked by Mandi 
algebra
polynomial subtraction aa2a6/2(a3) aa(squared)a6 divided by 2(a3)
asked by steven 
Algebra 1
It takes a lot of snow ofr the federal government in Washington D.C. to shut down, but even they experienced a twohour delay last Friday. This is to allow people to take it slow in thier way to work. A commute to work that usually takes someone 24 minutes
asked by Libby 
globle history 2
which asian countries neighbor japan
asked by neko 
Algebra distance problem
I can't figure this one out During a trip, a canoe travles 47 miles at r speed. The second part of the trip the canoe travels 9 miles, but 5 mph slower. The total trip is 5 hrs. What is the speed of each part of the trip? I start with 47/r+9/r5=5hrs Then
asked by Marysvoice 
algebra
Factor completely w^2+96w Is this right? (w3)(w3)
asked by becky 
algebra
use variable substitution and factoring to find all of the roots of each equation. x^49x^2+18=0 how do you do this??
asked by Lauren 
algebra
Choose the simplifed form of (4n^3)^3. The choices are 1/64n^9 4n^9 64/n^9 64n^9 I chose 64/n^9
asked by becky 
Math
Radius of the circle: ((X4)^2)+((y+2)^2)81=0
asked by Christine 
algebra
Add (r8s+6)+(4r+7s)+(s+3) Is this right? 5r+9
asked by becky 
chem
What should you mix with trisodium citrate to prepare a buffer solution, a strong acid or a strong base?
asked by Anthony 
math
one number is 6 more than another. If the sum of the smaller number and 3 times the larger number is 34, find the two numbers?
asked by austin 
Biology
What is transcription of DNA?
asked by Meli 
calculus
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x2x=y2 about the axis x=–3
asked by gennadiy 
life science
I cant grasp half life  the study guide question is how is half life dating used by scientists  I have 2 lines to write an answer
asked by claire 
earth science
where does the energy that drives the rock cycle come from
asked by jose 
more algebra
(4x)(32x)= Is this correct? 1211x+2x^2
asked by becky 
Religion
What events and figures have shaped the development of Islam in the united states?
asked by Meia 
AP Literature
I have to do a screenplay for my AP/Lit class. where can i find like examples of good screenplay done before? an a like a format guide on how to write one up?
asked by Bryan 
us history
what impact did teddy roosevelt have on the office of the presidency i need help!!!!!
asked by mike 
Math (Precalculus)
I have no idea how to do these problems: Given that U and V are in Quadrant II and sinU = 3/5 and secv = ã13/3, find: A) cos 2U B) sin (v/2) c) cos(U+V)
asked by Joe 
more chem
What is the pH that would result from the addition of 0.002 moles of HCl to 100 mL of a 0.1 M boric acid/borate, pH= 9.2 buffer solution?
asked by Anthony 
Astronomy NEOs
When Stuart ( 2003) revised the magnitude for spotting NEOs comets, over 1KM etc from H =18 to H 17.75 ... did this increase , decrease, or did the population of NEOs stay the same. and why ??? Me personally ..I think the number of NEOs over 1 KM has
asked by Lewis 
math
if a=6 and b=4, solve...(4a+4b) (4a4b)
asked by caitlin 
ethics
Trends in immigration will continue to shape the face of the United States. What will this face look like in the year 2050? How can the country best prepare for the changing race and ethnicity of its current and future citizens?
asked by Bob 
physics
A uniform electric field of magnitude 75 n/c is created at an angle of 33 degree relative to the positive xaxis. a)Find the voltage between the points (0.5m,0)& (0,0). b)find the value of y such that the voltage between the points (0.3 m, y) and (0,0) has
asked by Kwang hu111 
science HELP
name two elemetns that have natural occuring radioistopes?
asked by sam 
science
what occurs in a nuclear bombartment reaction
asked by sam 
grammar
I cannot think of a sentence using the word littler properly. This is a second grade assignment. Can someone please help?
asked by Mary 
french
what's the future of 'se leve' with accent aigu over 1st 'e' of 'leve'
asked by anonymous 
Math
What is the vertical asymptote of the function: f(x)= (X+5)/((X^2)12X+36)
asked by Christine 
vocabulary
What word means fear of meeting new people? Thanks for helping
asked by Cynthia 
Math
if a=6 and b=4, solve the equation (4a+4b) (4ab)
asked by Caitlin 
grammar
is when a preposition?
asked by Mackenzie 
Mass Media
What effect do you think the mass media of books has on Businesses?
asked by Waheedah 
math/algabra
whats x+2+2x=x+10?
asked by maura 
Math
Thanx 4 ur help!!!
asked by Meli 
us history
why did the american public favor war with spain
asked by mike 
criminal justice communication
I was assigned a paper to write against police stun guns and patrol car video surveillance. I have found some good sites and article on Police stun gun But I have not been able to find any information against Police Video Surveillance any help or
asked by RAY 
Prohibition
what are some specific consequences of prohibition
asked by Amanda 
french
write the verb in the future: se souvenir (tu) would this be right se souvenu?
asked by anonymous 
geometry
How do you find the hypoynuse of a triangle if the legs are 9 radical 2?
asked by M 
world history
67. what is the term for the Gernam attacks on merchant and passenger sips carrying American citizens that were resumed in December of 1916 and were largely responsible for he U.S. entering the war on the side of the Allies?
asked by Roderick 
world history
what is the common name for the clause in the treaty that forced Germany to assume full blame for causing the war?
asked by Seth 
health
How many bones are in the human body?
asked by Meli 
algebra
find ordered pairs for x+4y=6
asked by cathy 
math
what is 4.4 trillion/110 *100
asked by Ksy 
Science
How do can we help marshes
asked by Justin 
social studies
what problems arose because of the increase in industry during the early 1900s
asked by dara 
french
what is the future tense of sortir?
asked by anonymous 
Algebra
what is n? 3 n + =2 8 4
asked by Jeremy 
french
what's the future tense of tomber?
asked by anonymous 
spelling
what new words can you make out of the letters hummingbirdwaterproof
asked by cynthia 
us history
why did the american public favor war with spain
asked by mike 
grammar
what type of phrase is under the staircase?
asked by Mackenzie