Thursday
October 23, 2014

Posts by Anna


Total # Posts: 1,995

Math
Thank you!!
December 10, 2008

Math
Sorry... the function is: P = 11 + 44 1n x
December 10, 2008

Math
Suppose that the function represents the percentage of inbound e-mail in the U.S. that is considered spam, where x is the number of years after 2002. Use this model to approximate the percentage of spam in the year 2006 to the nearest tenth of a percent. Please show work.. ...
December 10, 2008

5th grade
i dont know either and i need to know to help my daughter!!
December 9, 2008

Sentence Editing
For example, a female may make her eyes appear rounder by completely outlining her eye to both corners, more oval by lining the top lid thicker in the middle, or larger by finely lining the bases of both the upper and lower lashes. I want to put "than before" in ...
December 7, 2008

Algebra
6000 = 200(t) Please help me solve this equation, and show the work... Thank you!!!
December 3, 2008

Algebra
Please solve the Linear Equation of P = 200(10)+6000 Please show work in all steps
December 3, 2008

health
What are the five stages of a human's life cycle?
December 2, 2008

1st grade
get a life you dork
December 1, 2008

Business mangement and leadership
Read through the 12 principals for Manging Change .Then select three principals you feel are most important to follow when managing and describe why you feel these are essential. Describe some specific techniques that can be used to manage change in an organiziation. explain ...
November 29, 2008

Religions of the World.
how do you explain the diffrent forms of the main Asian religions which exist ?
November 28, 2008

ochem
propose structual formulas for pheophytin a and pheophytin b
November 24, 2008

Essay Writing
So everything else doesn't have to be parallel like needs and personalities and cats and dogs aren't gerunds but thats ok since they are a different part of the outline?
November 24, 2008

Essay Writing
I need help with parallel structure. My essay is contrasting cats and dogs, with cats being the superior (sorry dog lovers). One paragraph is to be block method the other is to be point by point. II. Body A. Needs 1. Feeding a. Cats b. Dogs 2. Training a. Cats b. Dogs 3. ...
November 24, 2008

Essay Writing
I need help with making my outline parallel. II. Body A. Needs 1. Feeding a. Cats b. Dogs 2. Training a. Cats b. Dogs 3. Grooming a. Cats b. Dogs 4. Medicating a. Cats b. Dogs B. Personalities 1. Cats a. Playing b. Vocalizing c. Independence
November 24, 2008

math
the formula is that you add 5+9= 14 divide 120/14 and I keep getting a decimal, and then you would multiply that number by 5 and 9, and when those 2 numbers add up it would equal 120.. I just cant seem to figure this out though
November 24, 2008

math
Mix B= 5 cups of fruitjuice ; 9 cups of soda For this mix how much fruit juice and how much soda are needed to make punch for 240 people( each person gets half a cup of punch)
November 24, 2008

AP Chem
87. At what temperature would CO2 molecules have an rms speed equal to H2 molecules 25 degrees C? First I got the rms of H2 to be 1927.3 by taking u= sq root (3*8.31*298)/(.002 Then I tried to find the temp of CO2 by using 1927.3 sq root .044/ sq root (3*8.31) and I got 81.0 K...
November 20, 2008

chemistry
I'm not sure, but I think if you had lemonade with pulp it would be a heterogenous mixture because the mixture would not all look the same; you would have the liquid and the pieces of pulp.
November 19, 2008

Life Science
chloroplasts
November 19, 2008

7th Grade Math
first subtract 11 from both sides you get z/6 > -60 then multiply both sides by 6 you get z > -120
November 19, 2008

Eighth Grade Science
a temperature can't be celsius and K at the same time. which one is it?
November 19, 2008

Molecular Speeds
My work: At 25 degrees C u= sq rt. (3 * 8.31 * 298)/(2.80*10^-3km/mol) u= 16.3 m/s^2 At 125 degrees C u= sq root (3*8.31*398)/(2.80*10^-3km/mol) u= 18.8 m/s^2 those answers are wrong. and i don't know how to do the graph
November 19, 2008

Molecular Speeds
Can someone just work me through how to do this one problem? I should be OK on the rest then. Calculate the rms speeds of N2 molecules at 23 degrees C and at 125 degrees C. Sketch the approximate curves of the molecular speed distributions of N2 at 25 degrees C and 125 degrees...
November 19, 2008

AP Chem
Oh, I think I got it. Is it only when the gas is collected OVER water?
November 19, 2008

AP Chem
When dealing with gasses, do you subtract the pressure of water vapor every time it is in the equation? I'm confused on when you subtract it. Such as this problem... NH4NO2(s) -> 2H2O(g) + N2(g) How many grams of ammonium nitrate must have reacted if 3.75 dm^3 of ...
November 19, 2008

AP Chem
Would someone please check these for me? 52. In an experiment, you fill a heavy-walled 5.00-L flask with methane gas, CH4. If the flask contains 7.13 g of methane at 19 degrees C, what is the gas pressure? 2.14 atm 56. A 2.50-L flask was used to collect a 5.65-g sample of ...
November 19, 2008

preschool
obvisley cause It is preschool
November 18, 2008

Spanish
I tried and failed miserably. I have no idea whether to use preterite or imperfect but I can send you what I attempted. 1. Eran las tres cuando ella levanto para empezar el dia. 2. Mientras Philip fried (I don't know the word for fried) las papas en aceite, Elena paso la ...
November 17, 2008

Spanish
Thank you so much! I have a PC. Sorry I didn't have the accents but I don't know how to do them on the computer. :(
November 17, 2008

Spanish
Okay that's all of them Sra. If it is possible can you please check my work and help me figure out the words I did not know?
November 17, 2008

Spanish
I tried and failed miserably. I have no idea whether to use preterite or imperfect but I can send you what I attempted. 1. Eran las tres cuando ella levanto para empezar el dia. 2. Mientras Philip fried (I don't know the word for fried) las papas en aceite, Elena paso la ...
November 17, 2008

Spanish
Can you please help me translate these sentences using preterite vs. imperfect? 1. It was three o'clock when she got up to start the day. 2. While Philip fried the potatoes in oil, Elena vaccumed the living room. 3. Before leaving, I turned off the lights and closed the ...
November 17, 2008

8th grade science
ya so Get over the Fact u cant get a life drop out of school.
November 17, 2008

Chem
81. Formic acid HCHO2, is a convenient source of small quantities of carbon monoxide. When warmed with sulfuric acid, formic acid decomposes to give CO gas. HCHO2(l) -> H2O(l) + CO(g) If 3.85 L of carbon monoxide was collected over water at 25 degrees C and 689 mmHg, how ...
November 16, 2008

AP Chem
Phosphorus pentachloride is a white solid that sublimes (vaporizes without melting) at about 100 degrees C. At higher temperatures, the PCl5 vapor decomposes to give phosphorus trichloride and chlorine. How could gas-density measurements help to establish that PCl5 vapor is ...
November 16, 2008

AP Chem
Ammonium Chloride is a white solid. When heated to 325 degrees C, it gives a vapor that is a mixture of ammonia and hydrogen chloride. Suppose someone contends that the vapor consists of NH4Cl molecules rather than a mixture of NH3 and HCl. Could you decide between these ...
November 16, 2008

AP Chem
Phosphorus pentachloride is a white solid that sublimes (vaporizes without melting) at about 100 degrees C. At higher temperatures, the PCl5 vapor decomposes to give phosphorus trichloride and chlorine. How could gas-density measurements help to establish that PCl5 vapor is ...
November 15, 2008

AP Chem
Ammonium Chloride is a white solid. When heated to 325 degrees C, it gives a vapor that is a mixture of ammonia and hydrogen chloride. Suppose someone contends that the vapor consists of NH4Cl molecules rather than a mixture of NH3 and HCl. Could you decide between these ...
November 15, 2008

AP Chem
Help with these two please. 105. A radioactive metal atom decays (goes to another kind of atom) by emitting an alpha particle (He+2 ion). The alpha particles are collected as helium gas. A sample of helium with a volume of 12.05 mL was obtained at 765 mmHg and 23 Degrees C. ...
November 12, 2008

AP Chem
I thought that you always had to use atm in the equations.
November 12, 2008

AP Chem
Can someone please check these problems? 34. You fill a balloon with helium gas to a volume of 2.68 L at 23 degrees C and 789 mmHg. Now you release the balloon. What would be the volume of helium if its pressure changes to 632 mmHg but the temperature is unchanged? 3.35 L 38. ...
November 12, 2008

Math
I think it would be 28/100. Because if 72/100 is used for work then the rest of that would be 100-72 which is 28. And percents are over 100.
November 12, 2008

Chem
Can someone check these homework answers please? 32. The barometric pressure measured outside an airplane at 9 km was 259 mmHg. Calculate the pressure in kPa. 34.5 kPa 36. A diving bell is a container open at the bottom. As the bell descends, the water level inside changes so ...
November 11, 2008

Biology
One of the structures a cell uses to live,grow,and reproduce
November 11, 2008

Investments/Portfolio Mgt
How would the following be solved... Consider a risky portfolio. The end-of-year cash flow derived from the portfolio will be either $50,000 or $150,000, with equal probabilities of 0.5. The alternative riskless investment in T-bills pays 5%. a. If you require a risk premium ...
November 10, 2008

History- The Constitution
How does the elastic clause keep the Constitution "alive"? Give two examples of checks and balances.
November 9, 2008

chem
thank you
November 9, 2008

chem
What is the relationship between kPa and atm when dealing with measurements of pressure of a gas?
November 9, 2008

chem
A vessel containing 39.5 cm^3 of helium gas at 25 degrees celsius and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If tihs required 7.7 cm^3 of ethanol, what was the final ...
November 9, 2008

AP Chem
ooh ok that explains it lol thanks =]
November 9, 2008

AP Chem
I did that and got -22.7. 1st of all the answer is supposed to be .65 L 2nd of all where does the negative go?
November 9, 2008

AP Chem
Helium gas, He, at 22 degrees C and 1.00 atm occupied a vessel whose volume was 2.54 L. What volume would this gas occupy if it were cooled to liquid-nitrogen temperature (-197 degrees celcius). What is the equation?
November 9, 2008

other
i have four legs but can stand on one, i come out in the daylight but not in the sun. i have two sisters who our in power, my grandmother looks like a natural flower. some say im old but i feel like new, i stick to the bottom of your shoe! what am i?
November 5, 2008

Essay
I wrote an essay of examples on how cosmetics produce a flawless face. The title I came up with is Fixing Feminine Features. I don't know if I like it of not, but I wanted to do something that caught attention. Any tips?
November 4, 2008

AP Chem
A sample of H2 is collected by displacing 145 mL of water. The pressures of the gas and the atmosphere are equalized. The atmospheric pressure is 745 mmHg. The temperature of the water and gas are identical at 26 degrees C. How many moles of H2 have been evolved?
November 4, 2008

AP Chem
A solution of hydrogen peroxide, H2O2, is titrated with a solution of potassium permanganate, KMnO4. It requires 51.7 mL of 0.145 M KMnO4 to titrate 20.0 g of the solution of hydrogen peroxide. What is the mass percentage of H2O2 in the solution? If you want the whole equation...
November 3, 2008

AP Chem
Thanks for walkin me through that one =]. It helped a lot with the other problems like that too.
November 3, 2008

AP Chem
A chemist added an excess of sodium sulfate to a solution of a soluble barium compound to precipitate all of the barium ion as barium sulfate, BaSO4. How many grams of barium ion are in a 458-mg sample of the barium compound if a solution of the sample gave 513 mg BaSO4 ...
November 3, 2008

PIGSKIN GEOGRAPHY
WHAT KIND OF GRAINS ARE IN CEREAL BESIDES CORN, WHEAT, AND OATS?
November 3, 2008

AP Chem
I divided by 111.1. Our teacher likes us to use 3 digits when using atomic weight.
November 3, 2008

AP Chem
Oh wait, is this one like the last one I asked for? I didn't work that one out yet.
November 3, 2008

AP Chem
An aqueous solution contains 4.50 g of calcium chloride, CaCl2, per liter. What is the molarity of CaCl2? When calcium chloride dissolves in water, the calcium ions, Ca^+2, and chloride ions, Cl^-, in the crystal go into the solution. What is the molar concentration of each ...
November 3, 2008

AP Chem
A 3.50 g sample of KCl is dissolved in 10.0 mL of water. The resulting solution is then added to 60.0 mL of a 0.500 M CaCl2(aq) solution. Assuming that the volumes are additive, calculate the concentrations of each ion present in the final solution. *confused*
November 3, 2008

AP Chem
Yes, thank you. I was trying to do the equation like it was a carbonate that produced carbon dioxide, not as an acid.
November 3, 2008

AP Chem
Complete and balance each of the following molecular equations, including phase labels, if a reaction occurs. Then write the net ionic equation. If no reaction occurs, write NR after the arrow. H2CO3(aq)+Sr(OH)2(aq) -> this is what I put but I think its wrong H2CO3(aq)+Sr(...
November 3, 2008

Square Root Help!!! Urgent:)
1. 4 times squareroot 10 2. 3 times squareroot 11 3. 13 4. 2 times squareroot 3
November 3, 2008

algebra
how would you factor 25z^2 + 16
November 3, 2008

Math
subtract .2b from both sides. 0.3b + 3.4 = 12.4 subtract 3.4 from both sides 0.3b = 9.0 divide both sides by 0.3 b= 30
November 3, 2008

trig
what is the inverse tangent of (rad3/3)?
November 1, 2008

trig
inverse cos (-rad2/2)=135 degrees inverse sin (-rad2/2)=-45 degrees I dont understand why cos is 135
November 1, 2008

Math
d
October 26, 2008

chem
calculate the longest wavelength visible to the human eye
October 20, 2008

Essay
oh yeah i know they arent sentences. they are just ideas for the sentences. but they have to be in inverted order and i need a topic broader than giving back to the community.
October 19, 2008

Essay
i'm writing an inverted intro paragraph and these are the sentences i have so far. 1. ? 2. giving back to the community 3. community service 4. the youth volunteering 5. benefits of youth volunteering for commuity service can anyone think of a beginning sentence or make ...
October 19, 2008

phsical education
i need a lot of help lets just say that my gym teacher is making my class take health so i have a huge asignment due on monday i need 101 ways to be healthy they can be physical, emotional, mental,social, intellectual, and spiritual Good Luck (i know i tryed) -ANNA-
October 15, 2008

Physics
Someone posted the question below, stating that they knew the answer to part A but needed help with part B. Well even with the answer for A, I can't figure it out! Can you take a step back from the question below to show me the steps for solving part A? I've been ...
October 14, 2008

7th grade
WOULDNT THE TOTAL BE $3.60
October 14, 2008

physiology
as ___________increases, the two-point threshold decreases a.receptor # b.receptor density (i think its this one) c.receptor sensitivity d.receptor sensation
October 14, 2008

physiology
Bleaching induces conformational changes in both retinene and the associated opsin. T or F I don't understand this bleaching process
October 14, 2008

physiology
neurotransmitter release would be inhibited by a.stimulating repolarization of the axon terminal b.blocking Ca2+ influx in the axon terminal c.blocking repolarization of the axon terminal d.stimulating protein kinase activity I think its b, but not sure
October 12, 2008

physiology
what percent of blood flow to the body per minute goes to the brain ? 10, 20, 25, or 30% ?
October 12, 2008

physiology
the blood-brain barrier prevents hydrophobic molecules from diffusing into the brain. T or F Excitable cells are incapable of maintaining a constant resting membrane potential. T or F The membrane of resting nerve cells is more permeable to______ions than _________ions. a....
October 12, 2008

social studies
How do monopolies threaten the free enterprise system?
October 8, 2008

Consumer math
How to Compute percent of change in cost: Item:1 lb.apples price in 1970: 0.25 what is the Present price and what is the percent of change?
October 8, 2008

geography
Geography of Greece. How did it affect the people living in the region?
October 7, 2008

government
What is the newest government agency formed just earlier this week?
October 7, 2008

Spanish
linda--pretty princesa--princess reina--queen mi amor--my love
October 7, 2008

spanish
son las tres menos quince en punto.
October 7, 2008

science
OK,the question is what three statements that define all living things in terms of a cell? crossword puzzle! Anna
October 7, 2008

college - visual arts
R u doin it on a computer hi
October 7, 2008

AP Chem
Calculate the number of atoms in 32.0 g Br2. I keep getting 1.20 * 10^23 atoms Br2 but my book says i'm wrong.
October 5, 2008

math
3/5.37 = 8/14.32
October 5, 2008

AP Chem
but don't i have to know the formula for ethylene glycol?
October 5, 2008

AP Chem
Combustion of 6.38 mg of ethylene glycol gives 9.06 mg CO2 and 5.58 mg H20. The compound contains only C, H, and O. What are the mass percentages of the elements in ethylene glycol?
October 5, 2008

English: what's the formal term for...?
suspense?
October 5, 2008

Math
A book has n consecutive pages torn out (each paper in a book has two sides - each side is one page). Suppose A is the last numbered page before the torn out section and B is the first numbered page following the torn-out section. Find a formula for n in terms of A and B.
September 22, 2008

Science
did that help
September 22, 2008

Science
It would be a physical change because wjat it is made out of stays the same.
September 22, 2008

Math
Will a parabola intersect its directrix sometimes, always, or never?
September 22, 2008

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