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December 22, 2014

Posts by Student


Total # Posts: 573

Probability
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78
March 4, 2012

Math
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78 Is it B?
March 3, 2012

Calculus
Thank you!
February 28, 2012

Calculus
(tanx)^2 cannot be simplified to sinx/cosx because it's squared
February 28, 2012

Calculus
What is the limit as x approaches 0 of [(tanx)^2]/x?
February 28, 2012

Calculus
What is the limit as x approaches 0 of [(tanx)^2]/x?
February 28, 2012

Chemistry Help PLEASE!!
Got it! Thank you :)
February 24, 2012

Chemistry Help PLEASE!!
I think I realized what my mistake was, I assumed the reaction would go to the right, doesn't it go to the left?
February 24, 2012

Chemistry Help PLEASE!!
I don't know how to do this question, I understand we have to use ICE but I keep getting the wrong answer when I solve for x, it's just not working for me. Consider the following reaction: A(g) -> 2B (g) Find the equilibrium partial pressures of A and B for each of ...
February 24, 2012

Physics
Any assistance explaining how to work this would be great! The force exerted by the wind on the sails of a sailboat is Fsail = 480 N north. The water exerts a force of Fkeel = 240 N east. If the boat (including its crew) has a mass of 350 kg, what are the magnitude and ...
February 24, 2012

history
I think it is C or D. But I'm leaning towards C.
February 14, 2012

history
All of the following statements regarding the Monroe Doctrine are correct EXCEPT? A. Issued by Monroe in response to an onslaught by European monarchies against democracy in the Americas. B. Would have been ineffective without the backing of the British navy. C. Monroe saw ...
February 14, 2012

algebra
Yes you're right. THANK YOU SO MUCH!!
February 13, 2012

algebra
Wouldn't they both be > or = to?
February 13, 2012

algebra
Find the interval (or intervals) on which the given expression is defined: (x^2-7x+12)^(1/2)
February 13, 2012

chemistry
yes i believe e is true
February 13, 2012

chemistry
You react chemical A with chemical B to make one product. It takes 100 grams of chemical A to react completely with 20 grams of chemical B. What is true about the chemical properties of the product? a. the properties are more like those of chemical A b. the properties are more...
February 13, 2012

Physics
0.7 is the answers
January 31, 2012

chemistry
Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
January 22, 2012

chemistry
What mass of water must be added to 0.5 mol of glucose to make a solution of 25 percent by mass?The molar mass of glucose is 180 g/mol.
January 22, 2012

chemistry
Find the formula for the compound that contains 72.4% iron and 27.6% oxygen.
January 22, 2012

Math
I have an input/output table and I need to find the missing values AND develop a rule for y if I am given x. Here are the values I have: Input (x) Output (y) 1 8 2 14 3 ? ? 24 ? 28 6 ? Help PLEASE!
January 18, 2012

Student
Um... pretty sure this was a problem for one of my classes. Not supposed to be on the internet. Is there anyway to request to have a post removed?
December 13, 2011

physics
A 175-N box is placed on an inclined plane that makes a 30.0° angle with the horizontal. Find the component of the weight force parallel to the plane's surface.
December 11, 2011

proofread please
These four religions have some similarities but are very different in their beliefs and their cultural differences to society. Christianity is one of the largest religious groups in politics but and also is the biggest religious group in the world. Christians are influential ...
December 4, 2011

Proof read please hw help
Religion plays a big part in people's daily life. The Christian and Catholic religion beliefs going to conformation, regular church services, Sunday school, and other church events. Members may also pray throughout the day at times such as before meals and before going to ...
December 4, 2011

PROOF-READ MY PARAGRAPH
recheck please The first right given to every American citizen at birth is the right of freedom religion. Therefore, anyone would be able to choose which religion to endorse. Religions such as Christianity, Catholicism, Islam and Judaism can have major impacts in societies for...
December 4, 2011

PROOF-READ MY PARAGRAPH
The first right given to every American citizen at birth is the right to freedom of speech and religion. Therefore, anyone would be able to choose which religion to endorse. Religions such as Christianity, Catholicism, Islamic and Judaism can have major impacts in societies ...
December 4, 2011

paper!!final help plz
no help at alll form this website thx bye
November 6, 2011

paper!!final help plz
im doing a paper on anceiant agriculture i have wtiiten the paper but i need an into sentence just a good first sentencee
November 6, 2011

chemistry
Ksp = (Mg^2+)(pal)^2/[Mg(pal)2]- expression is incorrect. mg(pal)2 is not part of the ksp expression as the reactant is in the solid state. only Ksp = [Mg^2+][pal]^2 is relevant.
October 17, 2011

pre-algebra
Please help me solve these problems. 12^2+2 [(13+3)] / 2^2] -4(3)+5[7-6(-4)^2] -5(3)+3[9-6(-3)^2]
October 14, 2011

math
just skip my question i found the answer but this website helps alot but for once i found the answer b4 you guys thanks so much
October 12, 2011

math
how many inches are in cenimeters 25 ceinmeters = ? inchs
October 12, 2011

SCI 275 week 9 capstone question
pick the topic that you will do and then talk about y u would use that one over the others
October 12, 2011

physics help
a fireman D=50 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 30 degrees above the horizontal. If the speed of the stream as it leaves the hose is 40.0 m/s at what height will the stream of water strike the building?
October 2, 2011

6th grade math
yes i think they all have to be single digit numbers. and the second thing is that it counts as two examples
September 29, 2011

6th grade math
i have to make a conjecture on if there is more or less than 50 numbers that can be written as product of 3 digit numbers w/o using the number 1 more than once as a factor. Example: 10 can be 1*2*5 and 24 can be 2*3*4
September 29, 2011

physics
A rock is thrown vertically upward with a speed of 14.0 m/s from the roof of a building that is 50.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? in s What is the speed of the rock just before it strikes the ...
September 5, 2011

geometry
FIGURE IS PARALEL
August 25, 2011

chemistry
since all the gases are in % (100 percent) you could easily convert those percentages to grams to find the moles of O2, N2, and Ar.
August 11, 2011

chemistry
Oxygen in the air is O2 like wise nitrogen is N2. mole fraction = n (mole of 1 component) / N (total mole of all components) Oxygen mole = 21 g /(32g/mol)=0.66 mole Nitrogen mole = 78 g / (28g/mol) =2.78 mole Argon mole = 1g / (40g/mol) =0.025 total mole =0.66 + 2.78 + 0.025 =...
August 11, 2011

Data Management (Math)
A Canadian postal code uses six characters. The first, third, and fifth are letters, while the second, fourth, and sixth are digits. A U.S.A zip code contains five characters, all digits. How many codes are possible for each country?
June 19, 2011

UCI Chemistry Webworks
G. i H. ii, iii, iv.
May 7, 2011

UCI Chemistry Webworks
weird, I got CVOH to have the longest bond lengths
May 7, 2011

student civics
thank you for the help
March 10, 2011

student civics
so would you aggre that this is a valid argument that i can present?
March 10, 2011

student civics
over time there has ben recorded evadence that gay guys are more likly to be fasly accused then strate guys....... cbsnews. com/stories/2010/12/06/politics/washingtonpost/main7121875.shtml
March 10, 2011

student civics
why are gay guys given less of a chance then strate guys in a goverment court.
March 10, 2011

physics
On a distant planet, the acceleration due to gravity is 5.30 m/s2, and the radius is 4600 km. Use the law of gravitation to calculate the mass of this planet.
February 25, 2011

Chemistry
Complete combustion of 7.70 g of a hydrocarbon produced 23.7 g of CO2 and 10.9 of H2O. What is the empirical formula of the hydrocarbon? I first calculated the moles of both the carbon dioxide and the water, but I have no idea where to go from there. Any assistance would be ...
January 27, 2011

COM/155
Thank you for your help!
January 23, 2011

COM/155
I believe I have found all the mistakes. What do you think? Identify Twenty Errors in the Passage Below Review the passage below, which contains 20 errors. Identify these errors by marking each of the errors in bold, and make your correction in parentheses after the error. ...
January 23, 2011

com/155
I'm assuming you moved on. Thank you for your time.
January 23, 2011

com/155
Are you still with me? Just checking.
January 23, 2011

com/155
oops! Identify Twenty Errors in the Passage Below Review the passage below, which contains 20 errors. Identify these errors by marking each of the errors in bold, and make your correction in parentheses after the error. Example: My cars interior is black. This must be marked ...
January 23, 2011

com/155
I think I found all the errors. What do you think?
January 23, 2011

com/155
ok....everything should be good now. Hopefully, you will agree. Why are great numbers of students choosing to pursue their college degrees using their home computers.(computers?) Benjamin Franklin said;(said,) A (“A)penny saved is a penny earned”. (earned.”) ...
January 22, 2011

com/155
Thank you so much for your feedback. I think I have everything fixed. What do you think? Why are great numbers of students choosing to pursue their college degrees using their home computers.(computers?) Benjamin Franklin said; A (“A)penny saved is a penny earned”. (...
January 22, 2011

com/155
I think I found them all. What do you think? Passage: Why are great numbers of students choosing to pursue their college degrees using their home computers.(computers?) Benjamin Franklin said; A (“A)penny saved is a penny earned”. This principle applies to the ...
January 22, 2011

com/155
Sorry, I posted the master by mistake.
January 22, 2011

com/155
The 20 errors are in the following categories: comma usage (six errors); question marks, apostrophes, and quotation marks (five errors); capitalization (six errors); and colons, semi-colons, and commonly misused words (three errors). Passage: Why are great numbers of students...
January 22, 2011

math (geometry EAT thereom)
i understand that in the EAT thereom the sum of the inside angles equal to the outside angle.. in my homework i have to find the angle of a inside angle, and it gives me 2 outside angles that are 130 degrees and 120 degrees, how do i find the inside angle ?
January 10, 2011

Physics
Can you show us the solution to this problem? Part of our activity, please. ASAP. :)
January 2, 2011

Alg 2
Find A1 in a geometric series for which Sn=210, r=-2, and n=6? Can someone lead me in the right direction?
December 12, 2010

Algebra 2
thank you!!!
December 12, 2010

Algebra 2
Find the sum of the first six terms of the geometric series 81 -27 +9 -... how do you work it??
December 12, 2010

physics
sorry. but i posted under the original question and got not response. but i tried this for part b and i got it wrong
December 12, 2010

physics
The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its "resting" height of 1.1 m down to 0.1 m as the vaulter is slowed to a stop. (a) What is the time interval during which a vaulter who has just ...
December 12, 2010

physics
i tried what you said for part b and it was marked wrong.please help
December 11, 2010

physics
The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its "resting" height of 1.1 m down to 0.1 m as the vaulter is slowed to a stop. (a) What is the time interval during which a vaulter who has just ...
December 11, 2010

please help dont know how to solve
i tried to solve for b but got it wrong. can you just tell me how i can get it started please.
December 10, 2010

please help dont know how to solve
The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its "resting" height of 1.1 m down to 0.1 m as the vaulter is slowed to a stop. (a) What is the time interval during which a vaulter who has just ...
December 10, 2010

physics
A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 m. A fan forces air (ç = 1.8 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished every 12 minutes. Determine the difference in ...
December 6, 2010

physics
A venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at a speed v2 through a horizontal section of pipe whose cross-sectional area A2 = 0.0600 m2. The gas has a density of ñ = 1.30 kg/m3. The Venturi meter has a ...
December 4, 2010

Chemistry
The pH of a 0.0050 M aqueous solution of calcium hydroxide is? Make sure to include all equations.
December 3, 2010

math
I was hoping that this question was answered... It's Greek to me!
December 1, 2010

physics help
i really dont know how to start this thats why i need help on this
November 28, 2010

physics help
Two thin rectangular sheets (0.15 m 0.50 m) are identical. In the first sheet the axis of rotation lies along the 0.15 m side, and in the second it lies along the 0.50 m side. The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final ...
November 28, 2010

physics
A 1240 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1970 N crate hangs from the far end of the beamThe angle between the beam and the horizontal is 30 degrees upwards and the angle between the horizontal and the ...
November 28, 2010

physics help me please
A 1220 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1990 N crate hangs from the far end of the beamThe angle between the beam and the horizontal is 30 degrees upwards and the angle between the horizontal and the ...
November 28, 2010

Statistics
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking¡ªeven if they are not exposed to the usual pattern of sunlight. ...
November 20, 2010

Statistics
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking¡ªeven if they are not exposed to the usual pattern of sunlight. ...
November 20, 2010

physics
A worker pushed a 34.0-kg block 10.0 m along a level floor at a constant speed with a force directed 39.0° below the horizontal. If the coefficient of kinetic friction is 0.20, how much work did the worker do on the block?
October 28, 2010

Physics
What is the probability density at the fifth carbon atom if the electron is in the n=2 energy level? I have the formula as follows: Probability density = p5= (2/1.65) sin^2 (4x2pi/11) I know the final answer is 0.69 nm -1. However, I do not know how to retrieve this final ...
October 28, 2010

Physics
A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane flies 150m above the glacier at a speed of 110m/s. How far short of the target should it drop the package?
October 22, 2010

physics
Tarzan, who weighs 780 N, swings from a cliff at the end of a 12.0 m vine that hangs from a high tree limb and initially makes an angle of 49.0° with the vertical. Assume that an x axis extends horizontally away from the cliff edge and a y axis extends upward. Immediately ...
October 11, 2010

calculus
Calculate the volume of the body which is obtained by rotating the curve y = ex 2px, 0  x  1 about the x-axis.
August 13, 2010

trig
Calculate the amplitude, period, phase shifts, and 5 points for y=2-sin(2piex/3)
July 27, 2010

trig
your amazing.
July 27, 2010

trig
Let Q be an acute angle such that sinQ=.6. Find the values of the following using Trig Identities: cosQ and tanQ
July 27, 2010

chemistry
Def, have a better understanding. Thanks so much
July 16, 2010

chemistry
each material listed, sorry for not being specific.
July 16, 2010

chemistry
Which of the following is considered a Lewis acid or a Lewis base. I- H2O BCl3 NH3 OH- H+ CO2 SO2
July 16, 2010

chemistry, chemical kinetics
Thanks bro, atleast I know the second question can be right.
July 2, 2010

chemistry, chemical kinetics
I keep getting these questions wrong, could someone please help. Thanks so much. Question 1 For the following overall reaction, the rate constant is 3.4x10^-2. A(g)+ 2B -> 2C + D What may be the rate reaction? Question 2 The rate law for this reaction is R=k[NO][Cl2] ...
July 2, 2010

physics/orbital speed
thnk you so much.!
June 17, 2010

physics/orbital speed
an asteroid orbits the sun at a constant distance of 4.44e+11 meters, the suns mass is 1.00*10^30kg, what is the orbital speed of the asteroid? Please explain step by step thanks
June 17, 2010

physics
A boy carries a sack on one end of a very light stick that is balanced on his shoulder, at an angle of 22.0 degrees up from the horizontal. The mass of the sack is 7.00 kg, and it sits 1.20 m from his shoulder. If his hand is 0.350 m from his shoulder, on the other end of the...
June 16, 2010

physics
A rotating water pump works by taking water in at one side of a rotating wheel, and expelling it from the other side. If a pump with a radius of 0.120 m starts from rest and accelerates at 30.5 rad/s2, how fast will the water be traveling when it leaves the pump after it has ...
June 9, 2010

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