# Questions Asked onFebruary 15, 2008

1. ## Trig(3 all with work)

1)Find the exact value of cos 105 by using a half-angle formula. A)sqrt 2 - sqrt 3 /2 B)-sqrt 2 - sqrt 3 /2 C)-sqrt 2 + sqrt 3 /2 D)sqrt 2 + sqrt 3 /2 cos 105 cos 105 = cos 210/2 sqrt 1 + 210/2 sqrt 1 + sqrt 3/2 /2 sqrt 2 + sqrt 3/2 which is D 2)Find the

What are the pros and cons of completing the square as a way to solve quadradic equations?

3. ## American History

Can anyone tell me what was the importance of each battle/battle site of the Civil War battles that took place Nov 1864. They were Johnsonville Tenn, Bull's Gap Tenn, Columbia Tenn, Spring Hill Tenn, Franklin Tenn, Griswoldville Georgia, Buck Head Creek

The initials "L.S." at the end of a document: a. indicate that the signatures are lawful. b. show where the seal should be placed. c. serve as a substitute for a wax seal. d. both b and c. I believe the answer is D....both b&c...is that correct?

5. ## britian since 1948

How has britian changed since 1948

6. ## accounting

Multiple choice 1. The type of product costing system used by a company is dictated by the : a) plant supervisor b) project manager c) company president d) production process 2. Activity based costing traces production costs to a) activities within the

Nuclei with higher than desired neutron-to-proton ratio tend to undergo which type of decay? alpha beta gamma positron

8. ## Trig

Which expression equivalent to: cos(theta + pi/2). A)cos theta B)-cos theta C)sin theta D)-sin theta my book doesnt give examples of this but my crack at it would be C b/c distributive property? and 2cos theta = sin theta

9. ## Physics

Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Assume the orbit to be circular and 400 km above the surface of the Moon. At this altitude, the free-fall acceleration is 1.11 m/s2. The radius of the Moon

10. ## Math

The following scores were recorded on a 200-point final examination:193,185,163,186,192,135,158,174,188,172,168,183,195,165,183. Find the final examination score. Find the median final examination score. Is the mean or median a more useful representative

11. ## math

Ordered: Ceclor 0.375g po bid. On hand: Ceclor Oral Suspension 187 mg per 5 ml. How much medication will you administer?

12. ## chemistry

Assayed for LDH activity were 5 microliters of a sample that was diluted 6 to 1. The activity in the reaction vessel, which has a volume of 3 mililiters, is 0.30 U. What is the ΔA/min observed? What is the relative activity of the original sample? Here

13. ## Trig

Find the exact value of sin2(theta) if cos(theta) = -sqrt 5/3 and 180 < theta < 270. A)-1/9 B)-4 sqrt 5/9 C)1/9 D)4 sqrt 5/9 B? sin^2(theta) + cos^2(theta) = 1 sin^2(theta) = 1 - cos^2(theta) sin^2(theta) = 1 - (sqrt 5/3)^2 sin^2(theta) = 1 - (sqrt 25/9)

14. ## chemistry

what are the advantages of using a blue flame instead of a yellow flame for heating objects on a bunsen burner?

15. ## chemistry

what is the difference between a percent saturated solution of ammonium sulfate and a percent w/v solution of ammonium sulfate?

16. ## science

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3:1. If the allele are designated (R & r) respectively, what is the probable genotypes of the wrinkled seeds which were produced

17. ## statistics

A new treatment for AIDS is to be tested in a small clinical trial on 15 patients.The proportion p^ who respond to the treatment will be used as an estimate of the proportion p of (potential)responders in the entire population of AIDS patients. If in fact

18. ## physics

The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.5 m. The magnetic field of the generator is 0.10 T, and the coil rotates at an angular speed of 25 rad/s. What is the peak emf of

19. ## Algebra

Fomula: A=1/2(b1+b2)h A=area of a trapezoid b1=width at the top b2-width at the bottom h=height A 7-foor tall trapezoid has 42 square feet of area. If is is 9 feet wide at the bottom, how far across is it at the top?

20. ## accounting

identify three external users of accounting information and indicate two questions they might seek to answer through accounting information.

21. ## Physics problem

A transformer has 50 turns in its primary coil and 250 turns in its secondary coil. 12V is connected to the primary. a. Find the voltage across the secondary coil. b. Find the current in a 10 ohm device connected to the secondary. c. Find the power

22. ## Physics problem

Neon signs require about 12000V for their operation. The primary operates from 120V lines. a. What is the ratio of the number of loops in the secondary to the number of loops in the primary? b. What is the ratio of the power delivered to the secondary coil

23. ## Algebra

Forgot this part to the first desperate What is the slope and y-intercept of the line in part b? How do you know?

24. ## accounting

True/Falses 1. Period costs are not considered when costing products for inventory. 2. All direct labor costs during a period of time should be considered product costs and should be temporarily accumulated in the work in process inventory account. 3.

25. ## religious studies

Who was Jesus'most beloved desciple?

26. ## statistics

A population forms a normal distribution with a mean of sigma=75 and a standard deviation of 20. - What proportion of the sample means for samples of n=25 have vales less than 80? In other words, find p(M>79) for n=25 - What proportion of the sample means

27. ## Mth finding modes

Find the mode for 41,43,56,67,69,72

28. ## math

Asalesperson drove 238,159,87,163 and 198 miles on a 5-day trip.What was the mean number of miles driven per day?

29. ## Math find the mode

Find the mode for 9,8,10,9,9,10,8

30. ## HELP! parenthetical citation

I have a whole paragraph that basically summarizes a story. I have my own insight in the story. For example.. in this story blah blah blah I think that so and so blah blah blah. after doing this he did blah ... etc. i'm supposed to have three citations

31. ## math

In four years Cathy's cat Byte will be three fourths as old as Cathy will be. Four years ago, Byte was only half as old as Cathy was. How old are Cathy and her cat? I am struggling to solve this two variable word problem. please help.

32. ## math

what is the general equation for half-life?

33. ## Accounting 102

Turner and Isham agreed to form a partnership. Turner contributed \$ 200,000 in cash, and Isham contributed assets with a fair market value of \$ 400,000. The partnership, in its initial year, reported net income of \$ 120,000. Assume that the partnership

34. ## Math

The following scores were recorded on a 200-point final examination:193,185,163,186,192,135,158,174,188,172,168,183,195,165,183. Find the final examination score. Find the median final examination score. Is the mean or median a more useful representative

35. ## chemistry

when heating a substance over a bunsen burner where should the object be placed for most efficient heating? please explain.

Building a rectangular room with fixed perimeter of 280ft what dimentions would yield the maximum area? What dimentions would yeild the minimum area?

37. ## chemistry

Write the oxidation and reduction half-reactions of a corroding galvanized nail exposed to rain. The question says "galvanized" so its zinc. Zn(s) -> Zn2+(aq) + 2e- potential: +0.76V rain is slightly acidic, so i thought it would be O2(g) + 4H+ + 4e- ->

38. ## science

Boiling points and freezing points are examples of? a. physical properties b. matter c. chemical properties d. energy i am pretty sure it is a but i just need to have someone assure to me i am right

39. ## math

I need help bad. Fractions 1)1/3 + 5/12 + 4/5 = 2)13/15 - 11/20 = 3)1 1/15 + 3 3/10 - 2 4/5 = 4)Robin ran 5 1/3 mi on Sunday, 2 1/4mi on Tues, and 3 1/2mi on Fri. How far did she run during the week? 5)The interest rate on an auto loan in May was 12 3/8%.

40. ## Trig

Find the exact value of sinx/2 if cosx = 2/3 and 270 < x < 360. A)1/3 B)-1/3 C)sqrt 6/6 D)-sqrt 6/6 C, since I KNOW cosx is always positive but I don't know the work involved. I know the half angle formula

41. ## communication

CheckPoint: Press Releases • Resource: FBI Press Releases Web site: • Due Date: Day 5 [Individual] forum • Review a few sample press releases from the FBI Web site. Select and identify one that is well-written and discuss what makes it effective. In

42. ## science

1. What will happen to the pressure in your tires if the temperature drops 40 degrees over the night? a) Pressure will increase b) Pressure will decrease c) Pressure will not change d) Cannot determine

43. ## Math

I need serious help. Tried to work it out but I just couldn't get the correct answer. Benjamin and olivia are putting a new floor in their kitchen. To get the floor up to the desired height, they need to add 1 /8ft to subfloor. They can do this in one of

44. ## science

what are 3 types of symbiosis

45. ## Physics

The international standard Kilogram in Paris is stored under double bell jars. What is the prupose of the jars? Is it because the jars create a vacuum to prevent the standard from gaining mass due to oxidation? If so, why double jars? Are there any other

46. ## science

1. What will happen to the pressure in your tires if the temperature drops 40 degrees over the night? a) Pressure will increase b) Pressure will decrease c) Pressure will not change d) Cannot determine 2. Explain, on a molecular level, why this happens.

47. ## chemistry

An enzyme sample contains 24 mg protein/mL. Of this sample, 20 microliters in a standard incubation volume of 0.1 mL catalyzed the incorporation of glucose into glcogen at a rate of 1.6 nmol/min. Of this sample, 50 mL were fractionated by ammonium sulfate

48. ## algebra

You are planning to spend no less than \$6,000 and no more than \$10,000 on your landscaping project. How do you write an inequality that demonstrates how much money you will be willing to spend on the project.

49. ## science

how do protein assists with immunity

50. ## Spelling

please help I can't get these lost few words thank you I need the prefix and suffix and the Combining form for each word if there is one thank you so much ahead of time for your help Etymology Mastectomy Neuroma Tachycardia Endotracheal

51. ## pschcology

Skills Assessment Activity Throughout your textbook, you will find an assortment of interesting “tests” that sample a broad range of skills, abilities, and traits. Although these exercises allow a glimpse at aspects of personality, the results must be

52. ## basic chem

why is it not smart to replace coefficients in a blanced equation with the mass of each substance?

53. ## Music

My question is what compositional techniques were used in the 20th century? I have looked everywhere including my book and cannot find compositional techniques defined. Can you give me the definition of compositional techniques and then maybe I can figure

54. ## pschcology

Skills Assessment Activity “tests” that sample a broad range of skills, abilities, and traits. Although these exercises allow a glimpse at aspects of personality, the results must be interpreted with caution. For this assignment, complete the

55. ## Environmental Science

What levels of environmental analysis must a Federal agency charged with building public works consider for each project? What are the criteria for choosing each of these? I tried Googling for info on this question, but I can't find anything good. Thanks

56. ## Chemistry

How much volume in liters will 100.0 grams of oxygen occupy at 100 degrees celcius and 100 atm pressure?

57. ## music

How was the music of the 1960's different from the music of the 1970's?

58. ## math

Sorry....misposted the original question... 350/(400*50^(3/2)) = X+(50+X)^(3/2) Thanks for the help

the most important differences between object-oriented programming languages and generations 1-4 of (often called top down or structured) programming languages. How are they similar?

60. ## Indiana History

Name all the land features such as mountains, plains, deserts etc.

61. ## Math...For All Math Tutors

I would like to know how many of the people answering math questions here are current math teachers, were math teachers at one time, are current tutors working for a tutoring company or simply love math. What's your story? I would love to hear from all

62. ## American History

Why did King George III taxed the colonists?

63. ## Science

How do scientists separate aniamals into classes?

64. ## Social Studies

"That drug companies should NOT waive patents on HIV drugs in the developing world" Is this statement saying that drug companies should not give out drugs for free? What would be some points I could use to back up this argument please?

65. ## Math

Please double check me. The last problem I couldn't figure out. Thanks 18. 13/18 + 11/18 = 24/18= 4/3 38. 9/11 – 3/11 + 7/11 = 13/11=2 1/11 44. 7/1 + 12/1 + 21/1= 40/1=40 50. 3/8 + 3/8 + 3/8 = 9/8 = 1 1/8 12, 20, and 35 = 7*5*3*2*2= 420 13/15 – 11/20 =

66. ## Macro economics

Between year 1 and 3 the price level has risen and real GDP has fallen. During the same time W has risen. Identify one comination of changes in the labor supply and labor demand that could have the effect in the classical goods and services market.

1. All of the naturally occurring radioactive decay series end when the radioactive elements have decayed to bismuth (Bi) hydrogen (H) lead (Pb) uranium (U) answer: Uranium (U) 2. This type of radiation can easily pass through a human. gamma ultra-violet

68. ## Right triangle

Determine whether this is a right triangle vertices: G(1, -1) H(5, 0) and J(3, 8) Should I use distance formula to find the sides and use Pythagorean theorem to prove it? Or is there another method? Thanks.

69. ## Humanities

Please help me to create a priority list for the heart transplant for the following four potential organ recipients and explain your decision 1. A 72 year old woman, whose family depend on her help 2. A 32 year old man, who is currently in prison for

70. ## social studies

where can i find a picture of t.j marshall a african american

71. ## Trig(continued)

2)Find the solution of sin2 theta = cos theta if 0 -< theta < 180 A)30 degrees and 90 degrees B)30 degrees and 150 degrees C)30 degrees, 90 degrees, 150 degrees D)0 degrees, 90 degrees, and 150 degrees sin2 theta = cos theta sin2 theta - 1 = 0 (sin theta +