Friday

December 9, 2016
Total # Posts: 1,625

**chemistry**

what mass of acetylene, C2H2, will be produced from the reaction of 90 g of calcium carbide, CaC2, with water in the following reaction? CaC2+2H2O-->C2H2+Ca(OH)2

*May 28, 2012*

**Chemistry**

An etheral solution contains benzoic acid, 9-fluorenone, abd ethyl 4-aminobenzoate. Why would benzoic acid and 9-fluorenone not be extracted from this etheral solution by aqueous HCl ?

*May 15, 2012*

**algerbra 2**

What did the baby pocupine say when it backed into a cactus?

*May 13, 2012*

**computers**

Imagine that you have been hired as an IT consultant and have been asked to write a recommendation for an OS. This start-up company primarily develops games and has approached you to recommend an OS for its 25 employees who use desktop PCs. The primary purpose of the desktops ...

*May 10, 2012*

**algebra 2**

Solve the inequality (x-3)/(2x+1)>0

*May 2, 2012*

**Math**

There are 40 tags numbered one through 40 in a bag. What is the propability that Glen will randomly pick a multiple of 5 and then a multiple of 9 without replacing the first tag?

*May 1, 2012*

**Algebra 1**

1. 5x + 9 = 3x + 1 2. 14 + 7n = 14n + 28 3. 22(g 1) = 2g + 8 4. d + 12 3d = 5d 6 5. 4(m 2) = 2(3m + 3) 6. (4y 8) = 2(y + 4) 7. 5a 2(4a + 5) = 7a 8. 11w + 2(3w 1) = 15w 9. 4(...

*April 28, 2012*

**Science**

Changing the current changes the ___ of an electromagnet. Choices are: A. strength B. direction C. charge D. both a and b

*April 17, 2012*

**Math**

I need help trying to write out these binomial expansions: they all need to be raised to the 8th power. Thanks 1. (x + y) 2. (w + z) 3. (x - y) 4. (2a + 3b) - Now explain how your answer for #1 could be used as a formula to help you answer each of the other items. In each case...

*April 16, 2012*

**Chemistry**

I need help with this in order to correctly complete my other related problems. Thank you so much in advance =) Arrange the following 0.1 M solutions in order of increasing pH and state why you placed each solution in that position: NaCH3COO, HCl, HCN, NaOH, NH3, NaCN, KNO3, ...

*April 15, 2012*

**Chemistry**

I need help with this in order to correctly complete my other related problems. Thank you so much in advance =) Arrange the following 0.1 M solutions in order of increasing pH and state why you placed each solution in that position: NaCH3COO, HCl, HCN, NaOH, NH3, NaCN, KNO3, ...

*April 15, 2012*

**History**

Q: Which governmental position was NOT held by James F. Byrnes? Choices are: A. U.S. Secretary of State B. U.S. Supreme Court justice C. governor of South Carolina D. vice president of the United States

*April 15, 2012*

**History**

Q: What action did the United States NOT take against Japan before the attack on Pearl Harbor? Choices are: A. cut off the sale of oil and metal to Japan B. sent the Japanese ambassador back to Japan C. froze all the Japanese assets in the United States D. discontinued ...

*April 15, 2012*

**MATH**

What is the sum of (x^2-3x+2) and (5x^2-3x-8)? show your work help me!!!

*April 15, 2012*

**math**

Two prisms are similar. The surface area of one is four times the surface area of the other. What is the ratio of the corresponding dimensions?

*April 13, 2012*

**math**

A snailis trying to climb up a cup left by some students that littered.Each hour the snail slithers up 2`` but when he is tired he sleeps and slides 1``. How many hours until he reaches the top of the cup with a height of 10 is this an integer question?

*April 12, 2012*

**math patterning**

Look over the following sequence of numbers. What are the next 3 numbers in the pattern?what is the pattern rule? -1,0,1,0,1,2,3,6,11,20,37

*April 12, 2012*

**Algrebra**

I need to find the approximate surface area of a cone with the R=5 and L=6. I thought I figured it out by 3.14(5)(6) which will give me 94.2 I then would take 94.2 +3.14(5)squared and I came up with 172.7, but my answer should be either 20m squared, 98m squared, 118m squared ...

*April 9, 2012*

**Calculus**

Let L1 be the line with the vector equation r= (-2,3) +s(-1,3), seR. Let L2 be with the line with parametric equation x=3t+2, y=t-7, teR. Are L1 and L2 perpendicular? How do you know?

*April 8, 2012*

**Western experience**

Oops I meant c.

*April 3, 2012*

**Western experience**

I was thinking D by the way because calculating technology doesnt have much to do with communication

*April 3, 2012*

**Western experience**

All of the following are late-twentieth century technological developments that have revolutionized communication except A) development of the world wide web B) development of the personal computer C) development of calculating machinery D) development of the microchip E) ...

*April 3, 2012*

**biology**

I have the fetal pig test on muscles in AP biology class coming up soon. And I was wondering if anyone knows any good online sites where thye give pictures and i can practice labeling the muscles on the pig.. thanks

*April 1, 2012*

**PLEASE HELP!!!**

actually that is the kind of way i did it. I almost did 2 experiments on a total of 150 people. Thanks anyway

*March 31, 2012*

**PLEASE HELP!!!**

thank you

*March 31, 2012*

**PLEASE HELP!!!**

Hi, I'm doing a science fair and they're asking us to put pictures of us doing experiments or to bring in a model. In my project I experimented on people so was I supposed to take pictures of people performing the tasks? I already did the project and experiments and ...

*March 31, 2012*

**science fair**

Hi, I'm doing a science fair and they're asking us to put pictures of us doing experiments or to bring in a model. In my project I experimented on people so was I supposed to take pictures of people performing the tasks? I already did the project and experiments and ...

*March 31, 2012*

**History**

Why was South Carolina placed under military control? I think it is because it refused to ratify the 13th Amendment, but I am not sure.

*March 28, 2012*

**Algebra**

If a football field's length is 120 yds. and its width is 53 1/3 yards and a soccer field's lenght is 130 yds and its width is 100 yards how many times the area of the small field is the area of the larger field? I multiplied the length x width and got 6,400 for area ...

*March 28, 2012*

**physical science**

absolute zero is the same as

*March 27, 2012*

**physics**

normally warms up faster when heat is applied

*March 27, 2012*

**fun facts**

what are some fun facts on multitasking? if not that what are some websites to find good fun facts

*March 25, 2012*

**science fair**

in my science fair report school layout they want us to write a paragraph on testing my hypothesis and before that they asked us to write procedure. i wrote the procedure now do i rewrite it for testing my hypothesis?

*March 25, 2012*

**science fair**

in my science fair report school layout they want us to write a paragraph on testing my hypothesis and before that they asked us to write the procedure. i wrote the procedure now do i rewrite it for testing my hypothesis? or do i write something else

*March 25, 2012*

**science fair **

in my science fair report school layout they want us to write a paragraph on testing my hypothesis and before that they asked us to write the procedure. i wrote the procedure now do i rewrite it for testing my hypothesis? or do i write something else

*March 25, 2012*

**Math**

1. Simplify, and write in the base of 3: (9^x . 3^4x)^2 answer: 3^12x 2. Differentiate and simplify a. y= 3x^4 - 4e^x + 8 answer: 4(3x^3 - e^x) b. y= (3 + 4e^x)^5 answer: 20e^x (3+ 4ex)^4 c. y= (e^x - 1) / x^2 answer: (xe^x - 2e^x +2) / x^3

*March 24, 2012*

**Algebra**

triangular prism with base perimeter 24 cm, base area 24 cm^2, and height 15 cm. Choices are: A. 606 cm^2 B. 384 cm^2 C. 408 cm^2 D. 87 cm^2

*March 19, 2012*

**Algebra**

rectangular prism with base perimeter 30 cm, base area 50 cm^2, and height 150 cm. Choices are: A. 7,560 cm^2 B. 4,600 cm^2 C. 1,800 cm^2 D. 4,550 cm^2

*March 19, 2012*

**Finance**

Spam Corp. is financed entirely by common stock and has a beta of 1.0. The firm is expected to generate a level, perpetual stream of earnings and dividends. The stock has a price-earnings ratio of 8 and a cost of equity of 12.5%. The company's stock is selling for $50. Now...

*March 17, 2012*

**Calculus- please help**

Q. Find the minimum value of Q=x^2y subject to the constraint 2x^2+4xy=294. Its the derivative method.

*March 15, 2012*

**physics**

A brick of mass 0,5 kg possesses 100J of gravitational potential energy when held at a certain height above the ground.How long will it take to reach the ground when it is released?

*March 15, 2012*

**statistics**

assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 20. find the probability that a randomly selected adult has an IQ less than 20.

*March 14, 2012*

**statistics**

a statistics professor plans classes so carefully that the lenghts of her classes are uniformly distributed between 46.0 and 56.0 minutes. find the probability that a given class period runs less than 50.5 minutes

*March 14, 2012*

**Algebra**

whats c?

*March 14, 2012*

**Algebra**

A fish pond at the local park is a regular hexagon. a. Write a formula for the perimeter of the pond in terms of the length of a side. Explain your formula. b. Each side has a length of 7.5 feet. Find the perimeter of the pond. c. Suppose the designer of the pond wants to make...

*March 14, 2012*

**Science**

Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a two-foot diameter log D. Both logs and the splinters will burn at the same rate.

*March 12, 2012*

**English Literature**

Can anyone explain how expatriate Americans and native Europeans viewed America after WWI.

*March 8, 2012*

**Science**

Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a two-foot diameter log D. Both logs and the splinters will burn at the same rate.

*March 8, 2012*

**Science**

Which of the following conditions would likely cause the activation energy to be high? A. atoms are close together B. the temperature is hot C. atoms are not close together D. a catalyst is present.

*March 8, 2012*

**Algebra **

How far does a rider travel in one turn of each Ferris wheel? This is the first chart Measure Ferris Wheel Diameter (ft) 250 Height, including base 264 # of passenger cars 36 #of people per car 60 This is the second chart Measure Cosmo Clock Diameter (ft) 328 Height, including...

*March 7, 2012*

**science**

What are the main differences and similarities of the superior appendicular skeleton and inferior

*March 7, 2012*

**English**

Which of the following sentences is punctuated correctly? A. Melissa said that she would never go on a cruise B. Justin asked, "Will tickets be available online"? C. "Of course," Mr. Howard replied "You can buy tickets and rent a car online." I ...

*March 7, 2012*

**math**

czggaaaaagagagaag

*March 5, 2012*

**Accounting**

If Tom, an accountant, agrees to provide accounting services to Carl, a friend, in exchange for Carl fixing Tom's office floor, then: (Points : 1) Tom must report income on his tax return. Carl must report income on his tax return. Neither Tom nor Carl must report income ...

*February 29, 2012*

**Tax**

Hamad is an employee of Mountain Company. He properly completed his Form 1040EZ tax return and was required to pay the IRS $1,244 at the time of filing. He had income tax withholding during the year of $4,782. His tax liability for the year was: A. $1,244. B. $3,538. C. $4,782...

*February 29, 2012*

**Tax**

sorry my friend posted the same question u can reply to either one

*February 29, 2012*

**Tax**

Hamad is an employee of Mountain Company. He properly completed his Form 1040EZ tax return and was required to pay the IRS $1,244 at the time of filing. He had income tax withholding during the year of $4,782. His tax liability for the year was: A. $1,244. B. $3,538. C. $4,782...

*February 29, 2012*

**Science help!**

adding magenta and yellow dyes makes what color? At first i thought it was red. but when I realized we are adding dye's not light im thinking its black.. but im not sure! please help!

*February 29, 2012*

**maths**

If the side of triangle are equal, and it was made by placing beads touching it other, how many beads would you use if there are 3 beads on each side?

*February 27, 2012*

**math, geometry**

What if it has two equally sized bases of 10 and a height of 1 is it a trapazoid or quadaralladiral. ..Sorry for spelling mistakes.

*February 26, 2012*

**math, geometry**

Im not sure but i think it can if it has four sides...am i correct?

*February 26, 2012*

**math, geometry**

can a trapezoid have equal sized bases?

*February 26, 2012*

**Proof! Help!**

If k vertices has kC2 edges, show that (k+1) vertices has (k+1) C 2 edges

*February 23, 2012*

**History**

It only says that he argued against it for five hours in the state house. It doesn't explain why he opossed it?

*February 22, 2012*

**History**

Why did Jame Otis oppose writ of assistance?

*February 22, 2012*

**Social Studies**

Why did President Andrew Johnson veto a bill to continue the Freedmen's Bureau? Choices are: A. He believed it was not profitable B. He believed it was unconstitutional C. He believed it was not cost effective D. He believed it did not do what it was promised. I chose B. ...

*February 17, 2012*

**Social Studies**

Which Reconstruction plan divided the South into military districts? Choices are: A. the 100% plan B. Johnson's plan C. Lincoln's plan D. the Radical Republican plan Please help. Cant find answer.

*February 17, 2012*

**Social Studies**

Which U.S. Consitutional amendment has been the basis for Supreme Court decisions regarding public school segragation and forced reapportionment of voter districts? Choices are: A. 13th B. 14th C. 15th D. 16th I said B. 14th amendment

*February 17, 2012*

**Social Studies**

Which U.S. Constitutional amendment gave former slaves citizenship? Choices are: A. 13th B. 14th C. 15th D. 16th I said A. The 13th amendment

*February 17, 2012*

**geometry **

why do a rectangle and a parallelogram share the same formula? why does the triangle have a formula of b*w /2

*February 17, 2012*

**math**

thats all ..it seems so simple thank you

*February 16, 2012*

**math**

why do the parallelogram and the rectangle have the same formula? b*h

*February 16, 2012*

**Social Studies**

Thanks John

*February 16, 2012*

**Social Studies**

Why was Lincoln assassinated? Choices are: A. Booth had a mental illness B. Booth blamed Lincoln for the war C. Booth shot the president by accident D. Booth was paid by southern sympathizers to kill the president

*February 16, 2012*

**Social Studies**

What group believed President Lincoln's Reconstruction plan was too easy? Choices are: A. Democrats B. Freedmen C. U.S. Senate D. Radical Republicans

*February 16, 2012*

**Social Studies**

thanks for your help Ms. Sue !

*February 16, 2012*

**Social Studies**

Why did President Abraham Lincoln want Reconstruction to be simple and easy? Choices are: A. He wanted to win the votes in the South in his reelection campaign. B. He wanted to keep a good working relationship with former Confederates who would probably return to Congress. C. ...

*February 16, 2012*

**English**

Which of the following is punctuated correctly? Choices are: A. The new shoe store is located at 11347 Arthur Drive, Baltimore, Maryland 21201. B. The new shoe store is located at 11347 Arthur Drive, Baltimore, Maryland, 21201. C. The new shoe store is located at 11347 Arthur ...

*February 16, 2012*

**English**

what do you think it is?

*February 16, 2012*

**English**

Which of the following is punctuated correctly? Choices are: A. President Roosevelt described December 7, 1941 as a date which will live in infamy. B. President Roosevelt described December 7, 1941 as a date, which will live in infamy. C. President Roosevelt described December...

*February 16, 2012*

**Art**

Today, decisions in planning, selecting, and/or creating artwork for public display are made in the following way. Choices are: A. They are the decision of the artist B. by collaboration among the community, artist, and local government. C. They are the decision of the mayor ...

*February 15, 2012*

**Pre-Algrebra**

One gallon of liquid occupies 231 cubic inches. Write a rule that expresses the number of gallons g(c) as a function of the number of cubic inches c. Choices are: g(c)=c/231 g(c)=132/c g(c)=231c g(c)=132c

*February 15, 2012*

**Science**

During beta-particle emission, a neutron splits into _______? a proton and an electron two protons two electrons two neutrons

*February 14, 2012*

**algebra**

How many solutions do the linear equations x-y=2 -2x+2y=-1 have?

*February 11, 2012*

**algebra 1**

Amanda invested a total of $3,600 into three separate accounts that pay 5%, 7%, and 9% annual interest. Amanda has four times as much invested in the account that pays 9% as she does in the account that pays 5%. If the total interest for the year is $282, how much did Amanda ...

*February 9, 2012*

**elements of design**

1. Study the following sentence, then select the answer that best describes it. THE COW JUMPS OVER THE MOON! A. Italic serifed type B. Bold roman sans serif type C. Bold italic sans serif type(my answer) D. Bold roman serifed type 2. Which one of the following statements about...

*February 7, 2012*

**desktop publishing: an introduction**

place help i have this class and elements of design left and then i have my high school deploma from pennfoster i just need to know if my answers are right

*February 7, 2012*

**desktop publishing: an introduction**

1. What significant contribution did Gutenberg make to the printing process? A. Rotary press B. Woodcuts C. Movable types D.Monotype My answer A 2. The process of using a computer to write, design, and assemble documents is called A. optical storage C. consulting B. desktop ...

*February 7, 2012*

**Pre-Algrebra**

Alecia deposited $500 in a savings account at 5% compounded semiannually. What is her balance after 5 years? Can you please show me step by step how to do this problem. The choices are $650.00 $640.04 $670.05 $897.93

*February 4, 2012*

**Pre-Algrebra**

Solve the equation. 78=-2(m+3)+m -1/3m-7=5 1/4y+9=1/2 x-9=-6x+5 x+9=5(4x-2) Can you please show me how you got your answer.

*February 4, 2012*

**chemistry**

A particular form of electromagnetic radiation has a frequency of 5.42x10^15 Hz. What is the wavelength is nanometers? meters? reply in scientific notation.

*February 4, 2012*

**Pre-Algrebra**

s=g+h and I am suppose to solve for h

*January 30, 2012*

**Pre-Algrebra**

I have to solve the equation s=g+h and am totally clueless as to how to even start. Please help explain. Thank you.

*January 30, 2012*

**Differential Equations**

A rabbit starts at the origin and runs up the right branch of the parabola y=x^2 with speed a. At the same time a dog, running with speed b, starts at the point (c,0) and pursues the rabbit. Write a differential equation for the path of the dog

*January 26, 2012*

**3 grade english**

members of the save earth club

*January 26, 2012*

**Pre-Algebra**

(-e-10)=-5(e-12)

*January 24, 2012*

**Pre-Algebra**

4(m+7)=6m+58

*January 24, 2012*

**Pre-Algebra**

6y+8=-3y-28 Here is what I did 6y+8-8=-3y-28-8 6y=-3y+20 6y-(-3y)=-3y-(-3y)+20 3y/3 = 20/3 y=6.66666666667 what did I do wrong

*January 24, 2012*