Monday

December 22, 2014

December 22, 2014

Total # Posts: 215

**Chemistry**

Naturally occurring magnesium consists of Magnesium-24 (23.9850 amu; 78.99%), Magnesium-25 (24.9858 amu), and Magnesium-26 (25.9826 amu). Using the average atomic mass from the periodic table, calculate the closest percent abundance of Magnesuim-26. a) 29.30% b) 8.993% c) 10....
*December 15, 2014*

**Statistics**

The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past few years. It is estimated that approximately 90% of students now own a cell phone and 10% do not own a cell phone. Fifteen students are to be ...
*December 3, 2014*

**chemistry**

how many ml of 0.5 M BaCl2 are needed to have 75 g of BaCl2?
*November 25, 2014*

**Integral Calculus**

A force of 4 pounds is required to hold a spring stretched 0.1 feet beyond its natural length. How much work (in foot-pounds) is done in stretching the spring from its natural length to 0.6 feet beyond its natural length?
*October 15, 2014*

**Math**

If 8 jump ropes and 4 dolls cost $64, and 4 jump ropes and 8 dolls cost $92, how much will 12 jump ropes and 12 dolls cost?
*October 1, 2014*

**spanish**

How do you ask..."have you been studying your driver's manual?" in Spanish
*July 1, 2014*

**Math**

The sum of the degrees of the interior angles of a triangle is _____ degrees What is the sum of the interior angles of a parallelogram ? What is the sum of the interior angles of a rhombus? What is the sum of the interior angles of a kite? What is the sum of the interior ...
*June 4, 2014*

**Math**

Circle the angle(s) that could never be the smallest angle of a triangle. 8 degrees 47 degrees 88 degrees 91 degrees
*May 7, 2014*

**Math**

Triangle ABC is an isosceles triangle with angle A= 40 degrees. Give three possible values for angle B
*May 7, 2014*

**Math**

47, 88, 91
*May 7, 2014*

**math**

in lucys bead collection 75% of the beads where red 12% are blue the rest are green she has 104 green beads how many are blue beads
*May 1, 2014*

**math pre algebra**

thanks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! i have a test tomorrow and both of these will really help
*February 17, 2014*

**math pre algebra **

i need help with linear functions with ways to remeber them easier
*February 17, 2014*

**math**

From the foot of a building I have to look upwards at an angle of 22° to sight the top of a tree. From the top of a building, 150 meters above ground level, I have to look down at an angle of depression of 50° to look at the top of the tree. a. How tall is the tree? b...
*February 11, 2014*

**Math**

Thanks Damon. Yes, Chris collected $450 is a given. So if Chris collected $450, he walked 25 miles, correct. I'm having a hard time calculating the miles Lacy walked.
*January 23, 2014*

**Math**

Thanks:)
*January 23, 2014*

**Math**

How did you get 30?
*January 23, 2014*

**Math**

Thanks Damon. Yes, Chris collected $450 is a given. So if Chris collected $450, he walked 25 miles, correct. I'm having a hard time calculating the miles Lacy walked.
*January 23, 2014*

**Math**

Write an expression for the number of miles that Chris walked and an expression for the amount of money that Chris collected in pledges. Chris walked 5 miles less than twice the number of miles that Lacey walked. The students will collect $18 in pledges for every mile they ...
*January 23, 2014*

**physics**

A baseball of mass 0.145 kg approaches a bat at 40.0 m/s. After it is hit, the ball leaves the bat at 50.0 m/s directly back. Find the impulse of the bat on the ball.
*January 23, 2014*

**world civilizations**

12 is actually not D... it is either A or C!
*January 15, 2014*

**language arts**

the italicized words are "turning the corner" my answer was B. but just because it says that a gerund phrase starts with a word ending in "ing" doesnt mean that the sentence is nessicarlily correct,
*December 23, 2013*

**English**

its not c
*September 27, 2013*

**Algebra**

Two cyclists leave towns apart at the same time and travel toward each other. One cyclist travels slower than the other. If they meet in hours, what is the rate of each cyclist?
*September 21, 2013*

**Algebra**

Two cyclists leave towns apart at the same time and travel toward each other. One cyclist travels slower than the other. If they meet in hours, what is the rate of each cyclist?
*September 21, 2013*

**Algebra**

Two cyclists leave towns apart at the same time and travel toward each other. One cyclist travels slower than the other. If they meet in hours, what is the rate of each cyclist?
*September 21, 2013*

**Science**

Someone help me urgently!! WTF does the Big Idea of Energy mean?!?!?! KS3 Wise!!! <33333
*September 11, 2013*

**math**

Can someone please show me how to estimate mixed numbers. An exsample like 6 and two thrids times 4 and one fifth. Also estimate by rounding to 0, 1/2, or 1. Exsample...5/8x9/10. I would appreciate any help I am in the 6th grade and me and math are not doing so well.....Thanks!
*February 5, 2013*

**art**

In what ways does Albrecht Dürer’s "Four Apostles" serve as an expression of the Protestant faith?
*February 5, 2013*

**grammer**

What is the prepostional phrase and the object it modifies in the following sentence . Energy stored in carbohydrates is released quickly.
*January 7, 2013*

**Calculus**

The solution says the the boundary for phi is from 0 to pi as well as the one for theta.
*December 17, 2012*

**Calculus**

Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't understand how to get the...
*December 17, 2012*

**Calculus**

Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't understand how to get the...
*December 16, 2012*

**Calculus**

Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't understand how to get the...
*December 16, 2012*

**Calculus**

Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't understand how to get the...
*December 16, 2012*

**Calculus**

Do you know why they divided it by 2?
*December 4, 2012*

**Calculus**

Find the parametric equations for the line of intersection of the planes x+y+z=3 and x-y+2z=2 I took the cross product of the 2 equations and got 3i-j-2k I then set z=0 and got x=5/2 and y=1/2. I got: x=5/2 +3t y=1/2-t z=-2t However, the answers are supposed to be: x=5/2-(3/2)...
*December 4, 2012*

**Calculus**

Find the parametric equations for the line of intersection of the planes x+y+z=3 and x-y+2z=2 I took the cross product of the 2 equations and got 3i-j-2k I then set z=0 and got x=5/2 and y=1/2. I got: x=5/2 +3t y=1/2-t z=-2t However, the answers are supposed to be: x=5/2-(3/2)...
*December 4, 2012*

**Calculus**

The equation I used is cos (phi)*sin(phi)*rho^2 d(rho)d(phi)d(theta) I misspelled it on the first message.
*November 28, 2012*

**Calculus**

Evaluate, in spherical coordinates, the triple integral of f(rho,theta,phi)=cos (phi) , over the region 3<rho<7, 0<theta<2pi, 0<phi<pi/3. I used the equation cos (phi)*sin(phi)*rho d(rho)d(phi)d(theta) with the given boundaries. I got -632*pi*sqrt(3)/12 But ...
*November 28, 2012*

**math**

write a quotient that give the same anwser as 4.65 divided by .12
*November 12, 2012*

**Algebra **

Solve the equation and inequalities f(x)=0 f(x)>0 f(x)<0 We have a graph and y = f(x)
*October 29, 2012*

**physics**

A tennis ball with a velocity of +9.6 m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -5.8 m/s (to the left). If the ball is in contact with the wall for 0.013 s, what is the average ...
*October 6, 2012*

**Organic Chemistry**

Hmmm.. Darn. Well thanks for trying!
*September 16, 2012*

**Organic Chemistry**

h t t p : / / aceorganic . pearsoncmg . com / epoch-plugin / tempfiles / 1271 _ 1203. jpeg
*September 16, 2012*

**Organic Chemistry**

I had to put spaces between the url so I could post it. So you just need to delete all the spaces..
*September 16, 2012*

**Organic Chemistry**

Draw the most important resonance contributor of the following structure or compound. I'd think that the double bonded carbon would be the most important? Am I right? Thank you! h t t p : / / a c e o r g a n i c. p e a r s o n c m g. c o m / e p o c h - p l u g i n / t e ...
*September 16, 2012*

**math**

how can i use a tether board to help me in math?
*September 13, 2012*

**Math**

make an array for each of these sentences... 3*9=27 and 6*7=42
*September 5, 2012*

**Biology**

what is spontaneous generation How was it disproved
*August 30, 2012*

**Algebra 1B--Check Please!**

Thanks! so number two is wrong?
*June 7, 2012*

**Algebra 1B--Check Please!**

1.) Determine the equation of the axis of symmetry. y = -5x2 - x + 9 Answer 1.) x=3/2 2.) Determine the equation of the axis of symmetry. y = -6x2 + 3x - 4 Answer 2.) x=-2/10
*June 7, 2012*

**Algebra 1B**

Thanks!
*June 6, 2012*

**Algebra 1B**

Please someone answer me
*June 6, 2012*

**Algebra 1B**

1.) Find the GCF of -25a3b4, 45a6b5. I got 25a3b4 2.)Find the GCF of a5b, a3b4, a2b3. I got a2b 3.) Find the GCF of 10ab5, 12a3b4, 16a2b3. I got 2ab3
*June 6, 2012*

**Algebra 1B**

thanks
*June 6, 2012*

**Algebra 1B**

Simplify: 4n(2n + 2) My answer is-- 8n+8n Am i right?
*June 6, 2012*

**Algebra 1B**

thanks :)
*June 6, 2012*

**Algebra 1B**

Simplify (b^2/b) (b^2/b)
*June 6, 2012*

**Algebra 1B**

Thanks :)
*June 6, 2012*

**Algebra 1B**

the -3 is the exponent. and 6 is the base...
*June 6, 2012*

**Algebra 1B**

Evaluate m-3, when m = 6 I got 216 Would that be right?
*June 6, 2012*

**government**

the British House of Lords
*May 1, 2012*

**government**

the British House of Lords
*May 1, 2012*

**PLEASE CHECK**

1.)Solve for y in the following system of equations. x + 4y = -38 -x - 6y = 58 My answer 1.) -10 2.) 6 3.) 12 4.) 10 2.)Solve for y in the following system of equations. x - 10y = -50 -4x + 6y = -4 1.) -6 2.)3 3.)-3 My answer4.)6
*April 17, 2012*

**Algebra 1B--check **

Solve for y in the following system of equations. x + 4y = -38 -x - 6y = 58 My answer 1.) -10 2.) 6 3.) 12 4.) 10
*April 17, 2012*

**English--Essay help**

Thanks tabby. I really do know how to write an essay paper. I have done many before, and have got A's on them. I come from a family of writers, good writers. Thank you for your help once again. :) Also I'm sorry if i sound rude, i do not mean to at all.
*April 13, 2012*

**English--Essay help**

I haven't thought anything yet...I need to come up with a thesis statement first...And i can't think of one. I really didn't think this was a hard question...
*April 13, 2012*

**English--Essay help**

Im my english class, we have to think of that first....Its the first question on my lesson...Thank you for your help!
*April 13, 2012*

**English--Essay help**

I'm in need of some help. What do you think would be a good thesis statement for and essay on abortion pro-life? I have thought about this for at least an hour now, and can't come up with anything that is somewhat good....Ideas would be greatly appreciated :)
*April 13, 2012*

**calculus**

thanks :D
*April 12, 2012*

**calculus**

a radiotactive isotope lose 1/5 of its atoms in a sample decay after 14 years. find the half life.
*April 12, 2012*

**Chem 1A**

Help please! How many moles of NaOH must be added to 1.0 L of 3.0 M HC2H3O2 to produce a solution buffered at each pH? 1) pH= 3.78 2) PH= 6.52
*March 15, 2012*

**American Government**

Is it 1?
*March 5, 2012*

**American Government**

Okay then, will you give me a hint or something?
*March 5, 2012*

**American Government**

A _____ can only be ended with _____. 1.)cloture, filibuster 2.)cloture, debate 3.)filibuster, cloture 4.)filibuster, an amendment
*March 5, 2012*

**American Government**

Please someone answer, i don't have an answer...
*March 5, 2012*

**American Government**

Which statement does not accurately describe Committees on the Whole? 1.)It helps the House get around quorum requirements. 2.)It debates bills, offers amendments, votes, and passes them on to the entire House. 3.)It is a permanent fixture in Congress. 4.)It can operate with ...
*March 5, 2012*

**American Government**

Thank You!
*March 5, 2012*

**American Government**

Which statement is false? 1.)Most bills may originate in either house of Congress. 2.)To introduce a bill in the house, a representative drops a copy of the bill into a box called the hopper. 3.)After a bill is introduced, it can sit for weeks at a time before being assigned ...
*March 5, 2012*

**American Gov't**

okay, got it. Thanks (:
*March 2, 2012*

**American Gov't**

oh, is he talking about number 3?
*March 2, 2012*

**American Gov't**

how does that answer my question?
*March 2, 2012*

**American Gov't**

Which statement is NOT true about Congress? 1.)It was originally intended to be an elite governing body 2.)The vast majority of its members have college degrees 3.)The age requirement is the same for both houses 4.)Most members are lawyers
*March 2, 2012*

**American Gov't--please check**

Sweet! Thanks
*March 2, 2012*

**American Gov't--please check**

Most of Congress's implied powers are based on the _____ Clause. 1.)Equal Protection 2.)Judicial My answer3.)Necessary and Proper 4.)Authority
*March 2, 2012*

**American Gov't--please check**

Okay, sweet, thanks (:
*March 2, 2012*

**American Gov't--please check**

In _____, the Supreme Court placed limits on gerrymandering by requiring all congressional districts to have roughly the same number of constituents. 1.)Marbury v. Madison 2.)McCulloch v. Maryland 3.)Brown v. The Board of Education of Topeka My answer4.)Wesberry v. Sanders
*March 2, 2012*

**American Government**

Okay, thank you so much! (:
*March 1, 2012*

**American Government**

Name two of the many influential minor parties (also called third parties).
*March 1, 2012*

**American Gov't--please check**

Okay, Thank You! (:
*March 1, 2012*

**American Gov't--please check**

Which third party is an example of an economic protest party? 1.)The Green Party 2.)The Populist Party 3.)The Independent Party My answer3.)The Free Soil Party
*March 1, 2012*

**American Gov't--please check**

Is the first one wrong? Thanks so much for your help!
*March 1, 2012*

**American Gov't--please check**

How are the numbers of electors for each state decided? 1.)Each state gets one elector. 2.)Each state gets two electors. 3.)Each state gets as many electors as it has senators. My answer4.)Each state gets as many electors as it has members of Congress. Which is NOT a factor ...
*March 1, 2012*

**Please answer! **

Please answer someone
*February 28, 2012*

**American Gov't**

Which is NOT a factor that reinforces America's two-party system? 1.)Broad ideological consensus limits the appeal of radical parties. 2.)The winner-take-all system makes it harder for third parties to gain popularity. 3.)The two-party system was preferred by the Founding ...
*February 28, 2012*

**American Gov't--please check**

okay, so there saying its 3, right?
*February 28, 2012*

**English 10 --- Check Please**

Okay, i will next time...But i promise i didn't plagiarize....
*February 14, 2012*

**English 10 --- Check Please**

I would give you the link to prove it to you, but it won't let me. I'm not a thief. I have never plagiarized, and won't ever. The above comment was mine too..
*February 14, 2012*

**English 10 --- Check Please**

I this paragraph correct? Many names for groups are quite interesting. Group names were commonly used at one time. Now only a few of them are rare, some like "a pride of lions" or " a school of fish." Yet some group names are really neat in describing, for ...
*February 14, 2012*