Questions Asked on
August 30, 2008

  1. science

    use water displacement to find the volume of four marbles in ml

    asked by gina
  2. chemistry

    In a laboratory experiment, the density of a concentrated sugar solution was determined by measuring the volume of the solution and corresponding mass. Three students each made a set of measurements using a different balance and used the results to

    asked by helpp
  3. Pre-Calculus-check answers

    Use a sum or difference identity to find the exact value of sin 255 degrees Answer: sqrt6-sqrt2/4 Thanks

    asked by Lucy
  4. chemistry

    Rank the size of a change in temperature of one degree fahrenheit, one degree celsius, and one kelvin. Ok I can't seem to get this question right no matter what I do. Isn't one fahrenheit degree the largest then celsius and kelvin? There are 180 fahrenheit

    asked by natash
  5. Chemistry

    I have a "connecting concepts"on the introduction to Matter worksheet to do, and I don't know how to go about doing it. Can someone please help?? Thanks

    asked by Mike
  6. math

    a rectangular prism has a width of 92ft. and a volume of 240ft^3. Find the volume of a similar prism with a width of 23ft. Round to the nearest tenth if necessary. a)3.8ft^3 b)60ft.^3 c)15ft.^3 d)10.4ft.^3 I am totally cinfused by this. Can somebody please

    asked by Shannon
  7. Pre-Calculus-check answers

    Write an equation of the tangent function with period 3pi/8, phase shift -pi/5, and vertical shift -2. Answer: y=tan(8x/3 - 8pi/15)-2 Thanks

    asked by Lucy
  8. Chemistry

    You are asked to prepare 0.15 M HCl from a 36% W/v stock solution.Describe the procedure of the preparation.

    asked by Jimmy K
  9. gr12 math

    froma group of 6 ladies and 4 men, determine in how many ways a committee of 4 people cxan be selected. a. with no restirctions b. 4 women c. 3 women and 1 men d. 2 women and 2 men e. 4 men

    asked by milo
  10. help please????

    please can u give me some advices and sites or ANYTHING that can help me speak english very good and so fast. thank you alot.

    asked by XX
  11. Pre-Calculus

    The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with

    asked by Lucy
  12. 12 math

    a club consists of 25 married couples. determine how many committee of 7 people can be formed from these coules if there are A. no restrictions B. exactky 5 men on the committe c. at least one person has to be a men d. there must be at least 3 women and 2

    asked by marie
  13. Pre-Calculus-check answers

    State the period and phase shift of the function y=-4tan(1/2x + 3pi/8) a) 2pi, -3pi/4 b) pi, 3pi/8 c) 2pi, 3pi/8 d) pi, -3pi/8 Answer: d 2) What is the equation for the inverse of y=cos x+3: a) y=Arccos(x+3) b) y=Arccos x-3 c) y=Arccos x+3 d) y=Arccos(x-3)

    asked by Lucy
  14. Pre-Calculus-check answers

    A farm supply store carries 50-lb bags of both grain pellets and grain mash for pig feed. It can store 600 bags of pig feed. At least twice as many of its customers prefer the mash to the pellets. The store buys the pellets for $3.75 per bag and sells them

    asked by Lucy
  15. Algebra

    How can you determine if a polynomial is the difference of two squares? I think that if the polynomial is x^2-64 that this is a polynomial that is a difference of two squares because if you factor it out you would get (x+8)(x-8). If the 64 in my example

    asked by Laura
  16. Pre-Calculus

    Find a numerical value of one trigonometric function of x if tanx/cotx - secx/cosx = 2/cscx a) cscx=1 b) sinx=-1/2 c)cscx=-1 d)sinx=1/2

    asked by Lucy
  17. Language Arts

    Hi! At school my teacher told me to think of a riddle that has to move things or objects around. Example: There is a fox, chicken, and a box of seeds. Get across the river with a boat that could only carry one thing at a time. If you leave or put the

    asked by Anonymous
  18. physics

    wht is pi + arctan(-0.45)

    asked by physdummy
  19. biology

    What is evolution by natural selection? Do it mean changes.

    asked by kyle
  20. english

    how would i make this into a complete sentence " Willbur and Orville wright were the first. flying a powered airplane. In sustained flight.

    asked by ashley
  21. spanish

    What does "una bombada" mean? I read it on a t.v. caption.

    asked by jules

    I am looking for two relevant case of corportae ethical scandals that have occured over the past decade in Australia the case should be right in a legal way but..unethical

    asked by LEE
  23. Pre-Calculus

    I need help-I do not understand. The question is this: Write 2x+y=5 in polar form. By following the example in the book I get: 5sqrt5/5=1/sqrt5*sqrt5/2. I do not know how to proceed but the answers I have to choose from are: a) -sqrt5=r cos(theta-27

    asked by Lucy
  24. math

    Find the perimeter of a right triangle with legs of 20 cm, and 21 cm. a.882 b.82 c.70 d.47 I have no clue what to do. Can somebody help me with this please?

    asked by kelsy
  25. Pre-Calculus-check answers

    Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of f(x,y)=x+y. Answer: an optimal solution 2)Describe the linear programming situation for this system of inequalities: Answer: an

    asked by Lucy
  26. Pre-Calculus-check answers

    Name all the values of x that are not in the domain of f(x)=2-x^2/x+5. Answer: x= -5 2)Find the minimum value of f(x,y)=2x-y+2 for the polygonal convex set determined by this system of inequalities: x >/= 1, x

    asked by Lucy
  27. English

    This is my essay topic: If I could delay going to college for one year, what would I do in that time? I have to write things that would relate to my major and interests in college (pre-med) so I need to think of some activities related to that, like

    asked by mysterychicken
  28. Pre-Calculus-check answers

    Find the number of possible negative real zeros for f(x)=6+x^4+2x^2-5x^3-12. Answer: 0 2) Approximate the real zeros of f(x)=2x^4-3x^2-2 to the nearest tenth. Answer: no real roots

    asked by Lucy
  29. Pre-Calculus

    How do you find the polynomial funtion that best models data givn in a table for x and f(x). The only example in my testbook shows how to do it on a calculator but I cannot find any instructions with my calculator to tell me how to do it. The data for

    asked by Lucy
  30. calculus

    Use integration by parts to evaluate the integral of x*sec^2(3x). My answer is ([x*tan(3x)]/3)-[ln(sec(3x))/9] but it's incorrect. u=x dv=sec^2(3x)dx du=dx v=(1/3)tan(3x) [xtan(3x)]/3 - integral of(1/3)tan(3x)dx - (1/3)[ln(sec(3x))/3] - [ln(sec(3x))/9]

    asked by Integration by Parts
  31. science

    why do plants bear fruit?what are plant tissues?

    asked by pooja
  32. Theory of Vibration

    shows a single degree of freedom spring-mass system having a forced vibration and damper, starting from the second Newton’s law of motion, show that the extension of the system is given by X=Epg wnt sin(wd t + y). Also explain the conditions of the

    asked by Apanpa2
  33. Human Growth and development

    I am supposed to do a paper on an article using correlational research that is presented in an inappropriate manner. I am having a lot of trouble finding an article. I have spent 3 hours searching the internet today. Any ideas?

    asked by Karen
  34. spanish

    What does encantado mean English?

    asked by dylan
  35. 12 math

    benetley chalk brush manufacturer company has 900 empolyess: are female, are union members and are single.295 are single females, 187 are single union members 190 are female union memebers and 120 are single female union members. how many workers are

    asked by steveo
  36. Chattanooga State

    How does a company use financial statements to make future decisions?

    asked by Kathy
  37. algerbra


    asked by emily w
  38. science

    what is brain

    asked by pooja
  39. Theory of Vibration

    (1) The time for vibration of a viscous-damped spring mass system having a mass of 20kg is 0.30s. When the mass is stationary the upper end is made to move vertically downward at a velocity of 100mm/s. neglecting the mass of the spring and taking the

    asked by Apanpa1
  40. Pre-Calculus

    How do you work this problem. I cannot find an example in the book to illustrate how to work it. Find the value of tan(a-b) if cos a=-3/5, sin b=5/13, 90

    asked by Lucy
  41. social studies

    unscramble arfzunrdon two words

    asked by kevin
  42. spelling

    corrections please!! gliding , hungrier, believe, receipt, noticeable, poisonous, postdate, neighbors, cities, knives.

    asked by S
  43. 12 math

    solve for n where n {N C(n,2)=45 b. (n+2)! _____________= 56 n!

    asked by steveo
  44. English

    If only the cover of a magazine was used to write a paper, is there a need to cite it sepearately in the works cited page? If yes, how?

    asked by Anonymous
  45. social studies

    what was the name of the food that thomas jefferson returned to the u.s from france

    asked by anna
  46. algerbra


    asked by emily w