# Questions Asked onDecember 13, 2007

1. ## math

1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 A)15 B)15/2 C)-15 D)1/15 I chose A 5)Find the fifth term of the sequence in which a1=-3,and aN+1=3aN-n A)-301 B)-99 C)-193 D)-341 I don't know

2. ## Chemistry

What volume of O2 is required to react with excess CS2 to produce 4.0L of CO2 Assume all gases at STP. Not sure what I am doing wrong, but the answer I am getting is not one of the answers. 4L/X mole=22.4 L/1 mole ===>.1786 mols Balanced equation: O2 + CS2

3. ## chemistry - quant.

I need help calculating the pH of a solution that is .0400M Na3AsO4 I was trying to calculate the pH with [H30+]=sqrt(ka1*ka2) What is the correct way to calculate this? Thankyou

4. ## Math

What is the product of 7/16, 4/3 and 1/2?

5. ## maths

how do you write 2.089 in expanded form

6. ## Chem

The melting point of KCl is 776 C whereas the melting point of NaCl is 801 C. 1. Identify the type of bonding in each substance. A: Both NaCl and KCl are ionic. 2. Account for the differences in the boiling points of the substances using principles of

7. ## Calculus

Let R be the region in the first quadrant under the graph of y=1/sqrt(x) for 4

8. ## Math

The decimal form 1.46 becomes ______ expressed as a percent. 1- .146% 2- 1.46% 3- 14.6% 4- 146% 1.46 x 100 = 146% is this correct?

9. ## Astronomy

If a comet has a perihelion distance of 1.AU and an orbital period of 125 Earth years.. What is the comet's aphelion? Cannot seem to find the correct calculation

10. ## Orbital Dynamics

The zero-velocity value of the Jacobi integral at the L2 point of the Earth-Moon system is C= -1.59411. Suppose a spacecraft is newar Earth (r2=1/60 in our descriptions). Approximately waht speed must the craft have realtive to the rotating system if it is

11. ## Orbital Dynamics

The zero-velocity value of the Jacobi integral at the L2 point of the Earth-Moon system is C= -1.59411. Suppose a spacecraft is newar Earth (r2=1/60 in our descriptions). Approximately waht speed must the craft have realtive to the rotating system if it is

12. ## Astronomy help

If a comet has a perihelion distance of 1.AU and an orbital period of 125 Earth years.. What is the comet's aphelion? Cannot seem to find the correct calculation

13. ## math

1)Find the third iterate x3 of f(x)=x2-4 for an initial value of x0=2 A)-4 B)4 C)12 D)-12 I chose C 2)Use Pascal's triangle to expand:(w-x)5 This ones long so I chose w5-5w4x+10w3x3-10w2x4+5wx4-x5 3)Use the binomial Theorem to find the third term in the

14. ## MATH

THERE ARE 7 GIRLS ON A BUS EACH GIRL HAS 7 BACKPACKS IN EACH BACKPACK, THERE ARE 7 BIG CATS FOR EVERY BIG CAT THERE ARE 7 LITTLE CATS ? HOW MANY LEGS ARE THERE IN THE BUS?

15. ## math

If a penagonal prism has 7 faces and 10 verticies How man Edges does it have

16. ## Chem

In the van der waals equation, the constants a and b are: 1)used to correct for the finite volume of gas molecules and the attractive forces between molecules 2)equal to each other for any real gas 3)used to correct for the difference between Celcius and

17. ## French

How do you invert the following into a question? Elle dine a huit heures.

18. ## math

40% of what number is 82

19. ## art

Which phrase best describes the style of Rodin's sculptures? psychological and unfinished, Neo-Classical yet light-hearted, unfinished and light-hearted, unfinished yet polished? I think it is unfinished and light-hearted.

20. ## sci

Although most salamanders have four legs, the aquatics salamander shown below resembles an eel. It locks hind limbs and has very tiny forelimbs. propose a hypothesis to explain how limbless salamanders evolved according to Darwin's theory of natural

21. ## economics

Decreasing the money supply involves which type of economic policy? I think it is Monetary policy.

22. ## economics

Will buying bonds decrease the money supply?

23. ## Anatomy

how does hemoglobin carry O2 in the blood?

24. ## BEH / 225

On the text from BEH/225 on the book Personality Ch.11 pp. 421 on the summary table Defence Mechanisms. What defense mechanisms have you noticed in the people around you? What do you see as the advantages and disadvantages of these defence mechnaisms?

25. ## Science

What is a plant and animal seen regularly in the sotheast region (Georgia)?

26. ## literature

im writing a research paper on the easy company of wwii. well i have some info but my teacher said i have to make it controversial. any ideas on how i could do that. if so please get back to me

27. ## science

THE WOOLY WORM HUNT is an exciting "game" where the students are the Predators, hunting the great (and desirable) wooly worm. The class is given 60 seconds to pick up as many colored wooly worms as possible from the 1400 worms scattered across the Prep's

28. ## Algebra

There are 850 Douglas fir and ponderosa pine trees The company paid an average of \$300 for each ponderosa pine. If the company paid \$217, 500 for the trees, how many of each kind did the company buy?

29. ## science

What is the majority compound in cells? What is the majority element in cells? What is the second most major element in cells? Why do animals contain more calcium than plants?

30. ## calculus

A piecewise function is given. Use the function to find the indicated limits, or state that a limit does not exist. (a) lim is over x-->d – f(x), (b) lim is over x-->d + f(x), and (c) lim is over x-->d f(x) x^2 - 5 if x < 0 f(x)= -2 if x ->0 ; d = -3 1.

31. ## math

A classroom table is 1 meter wide and 1.75 meters long. How many 39 centimeter chairs can fit around the table?

A planet is growing by accretion of material from the solar nebula. Suppose that as it grows, its density remains constant. Does the force of gravity at its surface increase, decrease, or stay the same? Why? Also, What would happen to the surface gravity

33. ## Math

How do you find the tax, and estimate the tip of a price?

34. ## philosophy

Beautiful harmony comes from things that are in opposition to one another [Heraclitus ok i need to write my personal philosophy and i cant think of any examples of this quote for my body pargraphs...except velcrow..i don't think that a good one thought

35. ## social study

how is thegeography of Italy and Greece similar?

36. ## math

how do you find the greatest common of. 16 and 42; 8 and 18; 77 and 15

37. ## science

Beside people, what is the only animal that develops colon cancer on its own?

38. ## physics

Hi! I have a problem for physics homework and I though I knew how to solve it but apparently it is wrong, please help! 'Two cars, one of mass 1000 kg, and the second of mass 2400 kg, are moving at right angles to each other when they collide and stick

39. ## economics

If something happens and foreign consumers begin to buy more goods and services made in the United States, everything else held constant, what do you predict will happen to aggregate demand? I think it will move to the left.

40. ## science pproject

what would happen top a sunflower if it were left without sunlight for six days

41. ## Algebra HELP

USE LINEAR COMBINATIONS TO SOLVE THE SYSTEM OF LINEAR EQUATIONS (please show steps) 1) -X+8Y=16 2) 4X+5Y=-2 3)4Y=15-3X 3X+4Y=36 5X-4Y=-23 2Y=3X+21

42. ## Math - Logarithmic

Solve: 2^(5x-6) = 7 My work: log^(5x-6) = log7 5x - 6(log2) = log7 5x = log7 + 6(log2) x = (log7 + log2^6) / 5 And textbook answer: (log7) / (log2) What did I do wrong?

43. ## english

fallen angels we read that book in class. now my teacher want us to build a handbook for new recruits on surviving vietnam. k my question is how do u make a handbook i am so lost thanks

44. ## physics

what are the two opposing forces at balance in our sun? describe how the two opposing forces balance each other

45. ## math

If there are 1200 calories in one pound of ground beef, how many calories are in 3 oz of ground beef?

46. ## statistics

Select five random numbers between 70 and 100. Calculate the mean, median, mode, and midrange of these numbers. Based on your calculations, which measure of central tendency best represents these numbers?

47. ## Math - Logarithmic

Is the following correct when restating logs with variables to exponential? Log: log_a(a^3) --- base = a Exp: a^3 = a I know when dealing with real numbers, this is what you do: Log: log(10^5) Exp: 10^5 = 100 000

48. ## science

what is the driving force of evolution among natural selection, genetic diversity, and environmental stress? The answer is environmental stress but i am not sure exactly why....can someone explain?

-x/3=2/5

50. ## Math

Our teachers are having a toy drive. Mrs. A collected 10 more toys than Mr. B. Mrs. C collected twice as many toys as Mr. B. Mr. D collected 3 less than Mrs. C. Mrs. E collected 50 more than Mrs. A. Together they collected 487 toys in all and gave them to

51. ## math

how many ounces are in a pound?

52. ## Algebra II

Solve x^4 - 12x - 5 = 0 given that -1 + 2i is a root. I’ve used synthetic division to get the answers x = 1 +/- 2i , 1 +/- sqrt 2 I’ve having trouble checking the answers though because of that imaginary number. How can I check these kind of problems?

53. ## wr

what is a grumpy ocean dweller? (4) letters? ocean greetings? (5) letters? Thank you! Thank you!!1 crossword!

54. ## science lab

I did this lab experiment below and I am stumped this question:given the current warming trend of our planet, over time (generations of parents and offspring) what do you predict will happen to the species of wooly worms? THE WOOLY WORM HUNT is an exciting

55. ## World history

May you give me suggestions on how to improve this essay: Change of Time (or Changes and Continuities Essay)?

56. ## statistics

A specific brand of bike comes in two frames, for males or females. Each frame comes in a choice of two colors, red and blue, and with a choice of three seats, soft, medium, and hard. a) Use the counting principle to determine the number of different

57. ## world history// suggestions for essay

Please provide me suggestions for the Change over Time Essay, or Changes and Continuities Essay. Below is a rubric. Provide me tips on what to improve, expand, etc. Feel free to provide me some examples or give me topics/subjects to elaborate on. The

58. ## Math

OK I need so much help: i can't figure out this problem, and if i don't get it right i get an f on the assignmrnt: ok here is the problem: 5/6n+4= 5 7/8 HELP

59. ## Microsoft PowerPoint

Please can anyone help me with my problem. Does anyone know how or can tell me a free website to find out how to create a Microsoft Powerpoint slide presentation(8) with speaker notes,visual aids and graphics.

60. ## statistics

Select five random numbers between 70 and 100. Calculate the mean, median, mode, and midrange of these numbers. Based on your calculations, which measure of central tendency best represents these numbers?

61. ## statistics

Construct a frequency distribution of the ages that 25 randomly selected smokers started smoking: 26 26 25 17 16 16 14 17 21 16 16 18 17 15 15 19 16 17 22 15 19 17 16 27 16

what is text clues?

63. ## world history

Give me suggestions on the Change over Time Essay, or Changes and Continuities Essay. I am more interested on the content and whether or not I covered the requirements. Below the essay is a rubric. Provide me tips on what to improve, expand, etc. Feel free

64. ## com 125

What questions do you ask when evaluating a source, and why?

65. ## chemistry

How do you find the half-life of an element? Please explain and show me how to do this. I know the answer is 14.3 days, but I don't know how to work it. thank you! the problem is: After 42 days, a 2.0-g sample of phosphous-32 contains only 0.25g of

66. ## science

write a balanced equation - we have to do about 20 would be grateful if someone could show me first 2 1. silver + chlorine (arrow towards sc) silver chloride 2. hydrogen + chlorine (arrow towards) hydrogen chloride

67. ## Physics

Robin Hood is walking through Sherwood Forest when he comes upon Sheriff of Nottingham. The Sheriff tells Robin Hood that he is going to arrest hum for numerous misdeeds. Robin pulls out his bow, loads an arrow, puls the bow back 0.70 m, and shoots an

68. ## Algebra I

Wrtie a function using the table below. X Y 5 2 0 7 5 12 10 17

69. ## literature

can anyone help me with this exam 00779000 please i need your help

70. ## math

60 is 25% of what number

71. ## math

what number is 32% of 1,000

72. ## math

73 is 20% of what number

73. ## Math

2x+y=5 x-y=4 i kno the answer but i just want to make sure..am i in rite place lol

74. ## Math

A carnival game consists of rolling a single fair die, with the following results: you win \$8 for a 6, \$7 for a 5, and lose \$3 for any other number. Set a probability distribution, and calculate (already did) the Expected value = .50 Variance= 24.58

75. ## chemistry

Give the names of these acids. A. HNO(subscript 2) B. HMnO(s.s. 4) C. HCN D. H(s.s. 2)S Write the names of these bases. A. LiOH B. Pb (OH) s.s. 2 C. Mg(OH)s.s. 2 D. Al(OH)s.s. 3

76. ## dr bob HELP PLEASE

thanks dr Bob got through 6 now I am stuck again 1. Hydrochloric acid + Sodium hydroxide > sodium chloride + water 2. Magnesium hydroxide + hydrochloric acid > Magnesium chloride + water

77. ## Algebra Word Problem

A rectangle has dimensions of 12x8inches. If a uniform border is added, then the new rectangle has twice the area of the old rectangle. a) Find the width of the border b) find the new dimensions of the rectangle

78. ## Spanish for Sam

At this point I only know you have a project due Monday. The sooner you give me more particulars, the sooner I can do research, or whatever else you need. Sra

79. ## anatomy

do arteries carry blood to or from the heart?

80. ## math

57% of 109 is what #

81. ## science

how do you balance the equation below? Mg + O2 > MgO

82. ## algebra

What is 2 = x+1 ?

83. ## algebra

(-1,-2),(2,6)

84. ## URGENT HELP: calculus - limits at inifinity

1.The efficiency of an internal combustion engine is: efficiency (%) = 100 [1 - (1/(x/y)^c)] where x/y is the ratio of the uncompressed gas to the compressed gas and C is a positive constant dependent on the engine design. Find the LIMIT of the efficiency

85. ## Law and Ethics

I have to create a power point presentation comparing and contrasting the roles that ethics and laws play within health and human servies organizations. Do youm know any good websites that I can use as a reference to complete my presentation?

86. ## Spanish for Sam

OK. No sense doing a national holiday that has already passed. Here are 3 ideas: 1. Navidad = Christmas Day, December 25th. 2. Año Nuevo = New Year's Day, Jan 1st. 3. El Día de los Reyes = Epifanía = Epiphany, Jan. 6th = the day Spanish children get

87. ## sci

description of a typical precipitation and temperature for summer and winter. Then identify the characteristics of a plant and animal that is seen regulary in your region? How do the characteristics relate to the amount of rain or sunlight in your region?

88. ## Wind energy

How does wind energy get to you? Like I know you would have to have a mill in your yard but how does it get to the house?

89. ## linguistics

what do you mean by a "target language"???...

90. ## DR Bob one more

1. calcium carbonate < calcium oxide + carbon dioxide dr. Bob Hydrolic acide + sodium hydroxide < sodium chloride + water this cant be balanced already as assignment says we must balance each one

91. ## Math

I'm trying to calculate probablity of dependent and independent events. For example, from 3 nickels, 2 dimes, and 5 quarters, what is the probability of drawing 1 nickel, 1 dime, and 1 quarter in that order without replacement? Or drawing the same in any

92. ## science

balance FeS2 + O2 < Fe2O3 + So2

93. ## english

What does the term arbitrary mean?

94. ## world history

who was the German monks credited with starting a religious revolution after he had grown dis-illusioned with what he perceived as the corruption and worldliness of the Roman Catholic Church?

95. ## world history

what is the name for the periord in which there was a production shift from simple hand tools to complex machines and from human and animal power to steam power?

96. ## math

I'm just not good at word problems can someone help pleaes thanks a head of time An arithmetic student needs an average of 70 or more to receive credit for the course. She scored 89, 76, and 65 on the first three exams. Write an inequality representing the

97. ## Physics

I thought I did the problem right, but I don't think I came out with the right answer! Please someone check to see if I got this problem right. Calculate the force of gravity between Earth (mass=6.0*10^24 kg) and the moon (mass=7.4*10^22 kg). The average

98. ## art

How do we know that the woman in "Portrait of a Lady" was a member of the upper class?

99. ## Math

Compare the population per square mile in Asia to the population per square mile in North America for the year 2000. Population in Asia in 2000 was 4,028,000,000. Population in North America in 2000 was 305,000,000.

100. ## Chemistry (materials)

I have 3 questions: 1) how might the actual structure of a diamond help explain why it is sometimes found in the form of large, single crystals? 2) what feature of graphite's structure might account for its usefulness as a lubricant? 3) why are fullerenes

101. ## Physics

Which colored light bulb, red, orange, yellow, green, or blue, emits photons with the least energy? Explain. (b) Which emits photons with the greatest energy? Explain

102. ## world history/middle east/economics

nashville titans could sial to their game by cruising up the (10 blanks) River to its confluence with the (9 blanks) River then on to the (4 blanks) River.

103. ## economics

Which federal agency is responsible for managing inflation? The Department of Housing and Urban Development, The World Trade Organization, or The International Monetary Foundation? I think it is The World Trade Organization.

104. ## Math

I am in Calculus and am currently learning how to find the Area of a Surface of Revolution. I cannot understand what the surface of revolution (whether it's the x-axis, y-axis, or y=6) is. For example, I had a problem saying to use the washer method to

105. ## sra McGuin

Hi I am making a recipe for a smoothie please edit my draft as I will turn it in tommorrow Como hacer un batido de fresas y kiwis 1. Primero, necesitas tener una licuadora, cinco kiwis, seis fresas, jugo de nurijo, hielo, un cuchmillo, y unos vaos. 2.

106. ## english

I have to write a paragraph about a vacation spot using order of importance and I have no idea where to begin. Can someone help me start?

107. ## physiology

what is the procedure for WBC count

108. ## geometry

a right traingle has legs of lengths 3 centimeters and 5 centimeters. Use the pythagorean theorem to find the area of a square drwan on the hypotenuse of the triangle.

109. ## Algebra

2(x-3)-3(x+5)=3(x-2)-7

110. ## Eth

o Trends in immigration will continue to shape the face of the United States. What will this face look like in the year 2050? o How can the country best prepare for the changing race and ethnicity of its current and future citizens?