# Questions Asked onDecember 20, 2006

1. ## SCIENCE

The most common ion dissolved in river water is chloride, carbonate, sodium, phosphate, or nitrate. I think the answer is sodium chloride but the answer has these two separated. Is the answer just sodium? No, the answer is not sodium. The answer is

2. ## Chemistry

can anybody think of a reaction that involves benzyl acetate? formula is CH3COOCH2C6H5 i already have most of the synthesis's but i really need a reaction that involves this ester as a reactant NOT a product. thanks :) Why don't you just cleave the ester

3. ## math

ppl share a profit of 45000, they have a ratio of 3:8:4. how much will each person have? 9000,24000,12000 umm how i think 45000 is 15 units. so one unit is 3000. then you find what is 3 units, 8 units and 4 units.

4. ## math

the price of is 150/m3. the price is raisd by 10% each year. wat will the price of oil be at the end of two years? what is 1.1^2 * 150? if i understand the question the answer would be 181.5 The question isn't exactly clear how the 10% is done. If it is

5. ## math, beginning algebra

how do you solve this i've tried many ways and i always get stuck. -4(2x - 3 ) = -8x + 5 you use -4x times 2x first, then you times -3. so you have (-8+12)=8x+5. you know -8+12 is 4, so the equation becomes 4=8x+5. so x is probably a negative number. so

6. ## Math

what is the expected value of a fair game? It depends on the game: the rewards and the probability of particular outcomes. If the lottery has a 10 million dollar prize, and I have a one in five chance of winning it (I wish), the expected value would be 1/5

7. ## Prob and stats\ math

grading on a curve results in what percent of F's? It depends where you set your cutting points. for example, if you use Z = -2 as your cutting point, the percent below that point, approximately 2.5%, would get F's. However, the cutting point can be

8. ## SCIENCE

Is this true or false? I am confused. Tests have been conducted to mine uranium from seawater. My book says that at one time or another Japan, Germany, and the United States have expressed interest in the extraction of uranium. Japan set up a land-based

9. ## Math

Using the intersection method, I need to solve the following equation: 5x-3.3=x-2.1 Can you point me on the right path? you have to get x's on one side, and the numbers on the other. then solve for x. Kira, Thank so much for your help, but how do you graph

10. ## BIO!!

How do purines compare to pyrimidines? http://en.wikipedia.org/wiki/Pyrimidine http://en.wikipedia.org/wiki/Purine

asked by How do purines compare to pyrimidines?
11. ## BIO???

Fill in the blanks!' b) The amino acids ________________________ and ______________________ are involved in the mutation. my answer: The amino acids arginine and glycine are involved in the mutation.

12. ## Science

Every cell in the body has a full complement of all genes, however each cell type reads only certain genes. For example, both white blood cells and liver cells have genes for making digestive enzymes but they do not read them. how is this possible??? I

13. ## Physics

How would a physics expert respond to the following suggestions made by three airline executives? Write a script of the expert's response for performance in front of the class. Airline Exectutive A: Since the earth rotates from west to east, we could

14. ## Social Studies...help.....

How Connecticut got started? How did it become one of the 13 colonies? thanks a lot!!!!!! you just saved my life!!!!! =] http://www.ctheritage.org/encyclopedia/encyclopedia.htm http://www.google.com/search?hl=en&q=connecticut+history Lots of good

what is the difference between a plot and a summary? Plot: http://www.tnellen.com/cybereng/lit_terms/terms/2terms.html#Plot Summary: http://www.answers.com/summary They are similar in some ways, but the plot of a story, book, or play is like a blueprint --

16. ## Science

Please don't say this is to difficult to do or its o hard. Just tell me how to do it. I wanna amke a model in whihc electricity is generated through wond. ;) Check these sites for instructions about how to generate electricity with wind.

17. ## SCIENCE

Every cell in the body has a full complement of all genes, however each cell type reads only certain genes. For example, both white blood cells and liver cells have genes for making digestive enzymes but they do not read them. how is this possible??? I

I still don't understand the difference between the plot and summary. Let me see if I am right. If a project said to write about the plot could you put it in bullet format and name off major events in order. And if it asked to write the summary of the book

19. ## Biology

I'm working on a Chromatography Lab and need to identify the pigments that appear on the paper. I've found the names of the green and yellow pigments, but I can't identify a brownish streak that appeared when a paper consisting carnation pigement was

20. ## math, beginning algebra

Can someone correct this for me. Directions:Solve 6x-1 divided by 5 minus 2x divided by 3 equals 3 My answer: x = 6 yes If this is what you mean, [(6x-1)/5]-(2x/5)= 3 then yes, x=6 If you mean [(6x-1)/(5-2x)]/(3)=3 then no, x = 0.75

21. ## math, beginning algebra

can someone correct this for me. Directions: Solve each literal equation for the indicated variable. 2x + 3y = 6 (for x) Linear Equation My answer: X = 3-1.5y yes.

22. ## math, beginning algebra

can someone correct this for me: Directions: Solve each literal equation for the indicated cariable. A= 1/2 h (B+b) (for b) Area of trapezoid My answer: 2A divided by h minus B equals b. yes.

"The Great Rot Hunt" - Are these right. 1. The traps that Father set did not work because they were (d.) not set correctly. 2. The narrator retionalizes killing the rat by comparing it to a (c.) deer. 3. The narrator realizes that, to his father, success

24. ## science

What rock is it The remains of the dead sea animal settle to the bottom of the sea limestone

25. ## science

what rock is it the plants in a swamp die and are buired layer upon layer coal

26. ## science

what is the rock name a beach becomes covered wit water and additional layers of sediment. sandstone

27. ## science

what is the rock name clay settles in nearly still water shale

28. ## Algebra

Write a system of inequalities to express the exterior of the triangle ABD if A=(-2,7), B=(4,0), and C=(1,-3). Please help! gracias -7x/6 +14/3

29. ## Linear Equations

Directions: Use what is given to write an equation of a line in STANDARD, SLOPE-INTERCEPT, AND POINT-SLOPE form. 1. m = 3 (0,4) s=B4=3 si=3x+4 ps=y-4=3x Are we doing these correctly? I do not know what those forms mean, but if the line goes through (0,4)

30. ## Math

Write a brief answer to each question. Provide examples. a) When is the sum or difference of two monomials a monomial? b) When is the product of two monomials a monomial? c) When is the quotient of two monomials a monomials? Plz help, the questions confuse

31. ## Data Management

List all permutations of the elements of the set {+, -, *) List all subsets (combinations) of the elements of the set {+, -, *)

32. ## bio

i need info on carbon atom cycle. i need atleast 10 transformations....help Since this is not my area of expertise, I searched Google under the key words "carbon atom cycle" to get these possible sources: http://library.thinkquest.org/11226/why.htm

33. ## Earthquakes

Can subduction zone earthquakes be caused by recent wet weather? Yes, Water can act as a lubricant for the plates.

34. ## ‚g‚d‚k‚o�I�I�I

Give two examples of federalism in the United States. http://en.wikipedia.org/wiki/Federalism http://plato.stanford.edu/entries/federalism/ http://www.closeup.org/federal.htm =)

35. ## Physics

What quantitative information do you need to calculate each of the measurements of an object's motion Displacement: Average velocity: Average acceleration: Displacement: Final position minus initial position Average velocity: Displacement divided by time

36. ## FRENCH! HELP!

so i have this french test tomorrow on imparitive, and subjonctif. i have had a lot of trouble remembering them, and telling them apart. can anyone help!? that would be fantastic! thank you so much! its urgent! Imperative (note spelling) means giving a

37. ## french

how do i do subjontive? how do i know that i am doing it right? the endingings : e,es,e,ions,iez,ent - do i use those for every verb i use? for -ir verbs, do i also add -iss, or is that onlyfor imparitive? merci! Thank you for using the Jiskha Homework

38. ## Social

how does restoring voting to whites in the south help protect rights of freedmen in the 1870s? freedmen by the way were the slaves. thx for ur help :) It would have caused a great deal of anger if freedmen could vote, but whites couldn't vote. This was a

39. ## Algebra 2

I know it's easy, but I totally just blanked out on how to divide rational expressions. We're supposed to write them in the form quotient + (remainder/Divisor) For example, (2h2+h-2)/(h2-1) Those are h squareds. I know you would take h2 into 2h2 and get 2,

40. ## math,beginning algebra

can someone help me work this problem out. If a total bill at a restaurant, including a 15% tip, is \$65.32, what was the cost of the meal alone? \$56.8 let x = cost of bill Then x + 0.15x = 65.32 solve for x. \$56.80 is correct from Angela.

41. ## Algebra 2

Find a real plynomial equation with real coefficients that has the given roots. 3-2i, 3+2i Should I just make it [x- (3-2i)][x + (3-2i)] then multiply it out and there's my answer? angela, thanks for your help how did you get the 56.80 from my problem.

42. ## Math

How to solve, 1300cm2=m2 1 m = 100 cm 1 m2 = 1002 cm2

43. ## Algebra

For what value(s) of b will x^2 + bx + 3 have exactly one root? I'm rather new at this but wouldn't b=2*sqrt(3) give (x+sqrt3)2 as factors and that would give one root? Check my thinking. for a quadratic equation to have exactly one root, the discriminat