Thursday

January 29, 2015

January 29, 2015

Total # Posts: 76,854

**math**

Ivan is saving money to buy a computer with. He started with $225 in his savings account and the first week he added $75, the second week he added $200, the third week he unfortunately had to take out $50 and the fourth week he added $125. How much more money does he need to ...
*December 10, 2014*

**physics**

A 2 kg lab cart is sliding across across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.0 seconds and in what direction? Update 2: what i don't...
*December 10, 2014*

**math**

How do you factor 40y^2+y-6? Explain the steps please? I am very confused!
*December 9, 2014*

**history**

which of the following would not be considered an institution? A families B sports clubs C organized religion D civilizations is it d?
*December 9, 2014*

**language arts**

nobody awnserd
*December 9, 2014*

**language arts**

which of the following statements from Johnny Tremain most accurately describes Mr. Latham and his daughter-in law Mrs. Latham? A. Mr. Lapham is kindly and pious; Mrs. Lapham is pragmatic and determined B. Mr. Laphan is concerned about money; Mrs. Latham is concerned about ...
*December 9, 2014*

**general chemistry **

Copper crystallizes in a face-centered cubic unit cell with an edge length of 362 pm. What is the radius of a Cu atom in pm?
*December 9, 2014*

**Math**

what two numbers add to -19 and multiply to -42 (factoring?!) 14c^2-19c-3
*December 9, 2014*

**general chemistry**

it says it's incorrect
*December 9, 2014*

**general chemistry **

Copper crystallizes in a face-centered cubic unit cell with an edge length of 362 pm. What is the radius of a Cu atom in pm? What equation do you use?
*December 9, 2014*

**general chemistry **

Methanol has a ΔHvap = 35.3 kJ/mol CH3OH. Calculate the change in heat, q, when 50.0 g methanol condenses? Caution! Is q + or -?
*December 9, 2014*

**Math**

Thank you very much. :)
*December 9, 2014*

**Math**

1,279 * 4 + 3 = 5,119
*December 9, 2014*

**Math**

79 * 4 + 3 = 319 319 * 4 + 3 = 1,279 1,279 * 4 + 3 = 5,019
*December 9, 2014*

**Math**

Start a 4. Create a pattern that multiplies each number by 4 and then adds 3. Stop when you have 5 numbers. Can someone please help me out?
*December 9, 2014*

**physics**

An amusement park ride consists of a rotating circular platform 8.09 m in diameter from which 10 kg seats are suspended at the end of 2.19 m mass less chains. When the system rotates, the chains make an angle of 14.8 ◦ with the vertical. The acceleration of gravity is 9....
*December 9, 2014*

**Can you help me with this math problem? ASAP plz!**

simple for 3 years .045 * 3 = .135 .135 * 400 = 54 compounded for three years 1.032^3 - 1 = .0991 .0991 * 450 = 44.60 54 + 44.60 = 98.60
*December 9, 2014*

**French **

Hello. I need a bit of help in my french homework. Its on the subject of converting a paragraph to passé compose. Can someone please help me? Here's the paragraph: I've tried( my work isn't included) but I just want to ensure that it is correct. Vendredi ...
*December 9, 2014*

**physics**

A golf ball rolled off the edge of a table that has a height of 1.25 m and lands 0.48 m away from the table. The golf ball took 0.505 s to hit the ground 0.48 m from the table. What was the horizontal velocity, to the nearest hundredth m/s, of the ball as it rolled off the ...
*December 9, 2014*

**language arts**

it's from Johnny Tremain. Sorry! Anybody know the answers?
*December 9, 2014*

**language arts**

1. which of the following statements most accurately describes Mr. Lapham and his daughter in law Mrs. Lapham? A. Mr. Lapham is kindly and pious; Mr. Lapham is pragmatic and determined B. Mr. Lapham is concerned about money; Mrs. Lapham is concerned about religion C. Both Mr. ...
*December 9, 2014*

**chem **

Argon exists in three isotopic forms, 36Ar, 38Ar, and 40Ar. What is the relative rate of effusion of the fastest to slowest, ufast/uslow?
*December 9, 2014*

**Language arts help**

its a duh
*December 9, 2014*

**English**

Writers often make common errors by writing the way they speak. Identify and explain the sentence structure error in the following sentence: Because Belinda wants to move to California.
*December 9, 2014*

**English**

Writers often make common errors by omitting punctuation. Identify and explain the sentence structure error in the following sentence: Tabitha drove to school she took her math test she drove home in the afternoon.
*December 9, 2014*

**Chemistry**

What are some cons of becoming a pharmacologist?
*December 9, 2014*

**language arts**

1. A 2. D
*December 9, 2014*

**language arts**

thanks so much! do you know which one # 2 is?
*December 9, 2014*

**language arts**

which of the following statements most accurately describes Mr. Lapham and his daughter-in-law Mrs. Lapham? A. Mr. Lapham is kindly and pious; Mrs. Lapham is pragmatic and determined B. Mr. Lapham is concerned about money; Mrs. Lapham is concerned about religion C. Both Mr. ...
*December 9, 2014*

**pol 2901**

In republicanism, the state is viewed as a (Points : 1)
*December 9, 2014*

**science**

Thanks every one!!
*December 9, 2014*

**science**

I got it! I talked to my teacher. Anyway thanks!
*December 9, 2014*

**science**

Thanks and I already submitted my answer before you told me!
*December 9, 2014*

**science**

anyone??? Ms. Sue! Please
*December 9, 2014*

**science**

Oh ya choices are A. amplitude. B. wave speed. C. wavelength. D. reflection.
*December 9, 2014*

**science**

In electromagnetic waves, frequency is inversely proportional to Fast Please. I do not understand this
*December 9, 2014*

**language arts**

is it b?
*December 9, 2014*

**language arts**

is it b?
*December 9, 2014*

**language arts**

which of the following passages from Johnny tremain identifies a key event in the plot? A. "I'll buy your unexpired time. I think between us we could make some fine things you and I." The boy flushed. To thin the great Paul Revere wanted him B His feet went out ...
*December 9, 2014*

**language arts**

thank you!
*December 9, 2014*

**language arts**

which of the following passages from Johnny tremain is most useful in helping you determine what type of person mrs. lap ham is? A. "My!" said Mrs. Lapham, "that's the worse anything I had imagined. Now isn't that a shame!" B. When Mrs. Lapham came ...
*December 9, 2014*

**Algebra 2**

Have you considered trying to do any of these?
*December 9, 2014*

**geometry**

Points B, D, and F are midpoints of the sides of EC = 33 and DF = 20. Find AC. The diagram is not to scale. (1 point) A:40 B:33 C:10 D:66
*December 9, 2014*

**Health 4th grade**

When choosing a snack it is important to select a food that contains a large amount of these essential nutrients in comparison to the caloric value of the food. A.vitamins/nutrients B.vitamins/minerals C.vitamins/proteins D.vitamins/vegetables My answer:A
*December 9, 2014*

**physics**

Hahahahahahaha ha????
*December 9, 2014*

**Pre-Calc/Trig...**

Oh, okay. You made it very clear, thanks for the help. :)
*December 9, 2014*

**Pre-Calc/Trig...**

Which of the following could be an example of a function with a domain (-oo,oo) and a range (-oo,2)? Check all that apply. A. y= -(3)^x+2 B. y= -(3)^x-2 C. y= -(0.25)^x+2 D/ y= -(0.25)^x-2
*December 9, 2014*

**algebra 1**

0-0
*December 9, 2014*

**math**

Calculate the markdown percent. Round to the nearest tenth and do not enter the percent symbol in your answer. % b. If the offer was changed to "Buy 3, Get 2 Free," what would be the new markdown percent? Round to the nearest tenth and do not enter the percent ...
*December 9, 2014*

**Euler's method help in Calculus?????**

initial x = 0 Y(0) = 3 delta y = x y delta x = (0)(3)(.5) = 0 so y(.5) = 3 + 0 = 3 Y(.5) = 3 delta y = (.5)(3)(.5) = .75 Y(1) = 3 + .75 = 3.75 Y(1) = 3.75 delta y = 1 (3.75)(.5) = 1.875 Y(1.5) = 3.75+1.875 = 5.625 Y(1.5) = 5.625 delta y = 1.5(5.625).5 = 4.22 Y(2) = 5.625 + 4....
*December 9, 2014*

**math**

the sum of the ages of sam and tomas is 27 years. seven years ago, tomas was three years more than one-fourth as old as sam. find their present age
*December 9, 2014*

**math**

idk
*December 9, 2014*

**Calculus**

Y=2sinx-cos^2(x) F"(x)=-sinx+cos^2-sin^2(x) Find the points of inflection and concavities
*December 9, 2014*

**physics**

A 17.9 kg block is dragged over a rough, horizontal surface by a constant force of 119 N acting at an angle of 30◦ above the horizontal. The block is displaced 40.7 m, and the coefficient of kinetic friction is 0.111. what is the final speed
*December 9, 2014*

**Calculus**

I don't understand where you got t=sqroot(2)-1 and what would the actual x-intercepts be? I'm really confused.
*December 9, 2014*

**Calculus**

Y=2sinx-cos^2(x) on [0, 2pi] How do you solve for the x-intercept
*December 9, 2014*

**General Calculus Question**

Ok I understand it now. Thank you.
*December 8, 2014*

**General Calculus Question**

Yeah like limit as x approaches infinity( 3x^2+2x)/(sqrt(x^2-2x) Would it equal 3 then?
*December 8, 2014*

**General Calculus Question**

I understand that problem. I get confused with the square root in the denominator. Aren't you supposed to do something with absolute values?
*December 8, 2014*

**General Calculus Question**

How do you solve a limit when it approaches infinity and there is a square root in the denominator? say the highest power is x^2 in both the numerator and denominator.
*December 8, 2014*

**APCalculus**

Thank you so much.
*December 8, 2014*

**chemistry**

2C2H6(g)+7O2(g)--> 4Co2 (g)+6H2O(l) A) if 3.00 moles of C2H6 and 9.00 moles of O2 are introducedinto an empty container at 32.0 degree C and then ignited tointiate the above reaction calculate the mass of water that isproduced. B) if the container volume is 675 what mass of...
*December 8, 2014*

**chemistry**

2C2H6(g)+7O2(g)--> 4Co2 (g)+6H2O(l) A) if 3.00 moles of C2H6 and 9.00 moles of O2 are introducedinto an empty container at 32.0 degree C and then ignited tointiate the above reaction calculate the mass of water that isproduced. B) if the container volume is 675 what mass of...
*December 8, 2014*

**Math**

Simplify (x-(1/x))/(1-(1/x)) I don't get how to do this, can someone please help me? :)
*December 8, 2014*

**Chemistry**

I am soo lost on this one, I don't even know where to begin! I have read the chapter and it's just not clicking! If you start your reaction with 0.083 g of salicylic acid, what theoretical yield of acetylsalicylic acid would you predict? If your experimental yield of ...
*December 8, 2014*

**art help**

A is the answer
*December 8, 2014*

**Physics**

A 2.3 × 103 kg car accelerates from rest under the action of two forces. One is a forward force of 1141 N provided by traction between the wheels and the road. The other is a 947 N resistive force due to various frictional forces. How far must the car travel for its ...
*December 8, 2014*

**math**

there are 13 more girls than boys on the playground. there are 22 boys. how many girls are on the playground
*December 8, 2014*

**Chemistry**

The LD50 for oxalic acid in rats is 375 milligrams oxalic acid/kilogram of body weight. Assume that the LD50 for oxalic acid in humans is the same and calculate the oxalic acid LD50 dose for a 160lb human? My calculations: 375mg/kg•1kg/2.20lb • 160lb/1 = 27,272.73 mg
*December 8, 2014*

**physics**

a movie last 2 hours. during that time what is the angular displacement of each of the following? a.the hour hand b.the minute hand c.the second hand
*December 8, 2014*

**Chemistry**

To determine the amount of oxalic acid in rhubarb, you chop up and extract 85.2 grams of homogenized rhubarb with hot water. The extract is treated with calcium hydroxide and you isolate 0.6914 grams of solid CaC2O4•H2O. How many grams of oxalic acid were present in the ...
*December 8, 2014*

**Science**

What is a species that competes with polar bears for resources?
*December 8, 2014*

**Chemistry**

2HgO--->O2+2Hg 85g(HgO)*1mol/(200.59+16)g* 2molHg/2molHgO*200.59gHg/1molHg=78.721g that is your theoretical yield so 64.0g/78.721*100=81.3%yeild
*December 8, 2014*

**Chemistry**

When HgO is heated, it decomposes into elemental mercury and molecular oxygen gas. If 64.0 g of Hg is obtained from 85.0 g of the oxide, what is the percent yield of the reaction? The balanced equation is 2HgO > 2Hg + 02.
*December 8, 2014*

**science**

a pipe that carries 10 gpm of liquid at 50 psi with at least 0.5 sq in area must fit through a hole thats 1.25 in in diameter.
*December 8, 2014*

**Math**

set the y value equal to zero and then solve for x
*December 8, 2014*

**Math Help**

there are 7 forks to 5 spoons
*December 8, 2014*

**Math**

What is the work for x-intercept? I can't figure it out.
*December 8, 2014*

**Math**

when x=0 y=-1 when y=0 x=0
*December 8, 2014*

**Math**

Find x and y intercepts of y=sinx-cos^2x on [0, 2pi]
*December 8, 2014*

**5th grade math**

yes you do its very simple good job
*December 8, 2014*

**Math (Answer ASAP)**

-30
*December 8, 2014*

**math**

Let S be the part of the sphere x^2 + y^2 + z^2 = 25 that lies above the plane z = 4. Let S have constant density k. (a) Find the center of mass. (b) Find the moment of inertia about the z-axis. so far I have found that the magnitude of r(theta)x r(thi)= 25sin(thi)but I cant ...
*December 8, 2014*

**math**

Let S be the part of the sphere x^2 + y^2 + z^2 = 25 that lies above the plane z = 4. Let S have constant density k. (a) Find the center of mass. (b) Find the moment of inertia about the z-axis.
*December 8, 2014*

**Math**

y=2sin(x)-cos(x) so when x=0 y=2sin(0)-cos(0) y=0-1 y=-1 and when y=0 0=2sin(x)-cos(x) cos(x)=2sin(x) cos(x)/sin(x)=2 cot(x)=2 x=cot^-1(2) x=26.5651 which is not between 0 and 2 pi
*December 8, 2014*

**Math**

Y=2sinx-cosx on [0, 2pi] Find x- and y-intercepts
*December 8, 2014*

**english**

How dies George figure that he, Lennie and Candy could perhaps buy the dream place?(four points).
*December 8, 2014*

**Health 4th grade**

It is important to choose simple carbohydrates for breakfast to get you started for your day. True or False My answer: True
*December 8, 2014*

**english**

yes we read it on class together
*December 8, 2014*

**english**

How dies George figure that he, Lennie and Candy could perhaps buy the dream place?(four points)
*December 8, 2014*

**Fitness and nutrition**

A person can achieve optimum daily nutrition by
*December 8, 2014*

**Biology**

Thanks! Now I have some ideas.
*December 8, 2014*

**Biology**

What can I write for an assignment that asks me to write about what ecology means to me? I don't know exactly what is meant by "means to you," as in the assignment.
*December 8, 2014*

**biology**

What are some benefits and challenges of being a pharmacologist?
*December 8, 2014*

**bio**

Enzymes are
*December 8, 2014*

**language arts**

which word best describes Mrs. Lapham in Johnny Tremain? A. generous B. kind C. parctical D. religious Is it C?
*December 8, 2014*

**Chem**

5.04x1034 atoms of Zn
*December 8, 2014*

**English**

Is this a good introduction for a Domestic violence persuasive essay? She had so much potential. Her whole life ahead of her. She wanted to get a degree, get married and have children. But she is dead...
*December 8, 2014*

**English**

Never Mind i got it! I just needed help with this question but i got it! Thanks.
*December 8, 2014*

**English**

Ya I did but I do not understand the story!
*December 8, 2014*

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