1. Chemistry

Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

2. Chemistry

An antacid tablet weighing 1.462 grams was dissolbed in 25mL of 0.8M HCl and diluted with water. The excess HCl was titrated with 3.5 mL of 1.019M NaOH solution. 1. Calculate the number of millimoles added to the tablet 2. Calculate the number of

3. maths

if cot theta =7/8 , evaluate (1+sin^2theta)(1-sin^2theta)/(1+cost^2theta)(1+co-^2theta) the answer should be 49/64 but i couldn't get that answer. can any one help?

4. algebra

find the last digit in 3^9999.

5. phoenix

o Is it difficult to accurately measure prejudice? Why or why not?

11. Math

How can i factor 27a^2 - 75b^2

12. Chemistry

Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

13. economics

Assume Cliff and Paul were both producing wheat and corn, and each person was dividing his time equally between the two. Then each decides to specialize in the product in which he has a comparative advantage. Furthermore, they agree to trade 3 bushels of

14. Physics

Fairgoers ride a Ferris wheel with a radius of 5.00 {\rm m} . The wheel completes one revolution every 31.5 s What is the average speed of a rider on this Ferris wheel? If a rider accidentally drops a stuffed animal at the top of the wheel, where does it

15. physics

The two masses in the Atwood's machine shown in the figure are initially at rest at the same height. After they are released, the large mass, , falls through a height and hits the floor, and the small mass, , rises through a height . Find the speed of the

16. physics

Two blocks are connected by a very light string passing over a massless and frictionless pulley (the figure ). Traveling at constant speed, the 20.0- block moves 70.0 to the right and the 12.0- block moves 70.0 downward.During this process, how much work

17. english

I have to edit the following sentences to untangle mixed constructions. Here is the list of five and my corrections below them. 1. Early diagnosis of prostate cancer is often curable. 2. Depending on our method of travel and our destination determines how

18. Calculus

Diffentiate the function F(x)=(1/2x)^5 My answer is 5/2x^4. The book says 5/32x^4. what am I doing wrong?

19. algebra

How is doing operations—adding, subtracting, multiplying, and dividing—with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another

20. Physics

The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest or “ground” state, n=3 is the third state, and so on. If the atom’s diameter is

21. English

I still have a last question: In the reading comprehension the sentence is " When we went to complain to the travel agency, as a compensation for all the incovenience we had been caused, they offered us a weekend for two in Rome organized by the same tour

22. geometry

True or false? a!(b!c!) = (a!b!)c! I think its true...?

23. physics

A runner dashes from the starting line (x = 0) to a point 80 m away and then turns around and runs to a point 39 m away from the starting point in 23 seconds.What is the runner's average velocity in the previous problem?

24. physics

carts of a roller coaster are travelling 5m/s over the top of the first hill. If there is no energy loss due to friction and the hill is 50m high,what speed will the carts have at the bottom

25. american government

Campaign spending tends to be greatly more important: a)for Republican candidates b)for Democratic candidates c)for candidates in urban areas than candidates in rural areas d)for challengers and non-incumbents rather than incumbents IS d CORRECT

26. managerial economics

Suppose that the demand curve for beans is given by: Q=20-P Where Q is thousands of pounds of beans bought per week and P is the price in dollars per pounds a. How many beans will be bought at P=0 b. At what price does the quantity demanded of beans become

27. college

If a man leans over a cliff and throws a rock upward at 4.9 m/s. Neglecting air resistance, what is the rock's speed one second later?

28. managerial economics

Explain the relationship between product X, product Y and product Z or the properties of each according to the following statements a. Cross price elasticity between X and Y is -4 b. Cross price elasticity between X and Y is 12 c. Cross price elasticity

29. social studies

For children who are learning English as a second language. context-embedded activities enhance?

30. English

1. I'd better get going. (What is the meaning of 'get going'? What other expressions can we use?)

31. managerial economics

Explain how the following events might affect the market demand curve for prime filet mignon a. A fall in price of filet mignon because of decline in cattle prices b. A general rise in consumer's income c. A rise in the price of lobster d. Increased health

32. managerial economics

1. Calculate the demand elasticity of demand ( by using at least two methods) given the following information: P1 = 10 Q1=100 P2 = 15 Q2 = 20 Is the product elastic or inelastic?

33. managerial economics

2. Decide whether the following product is normal, inferior, or luxury. Explain how you can find that? a. Income increases by 20% and quantity decreases by 30% b. Income decreases by 20% and quantity decreases by 30 % c. Income decreases by 20% and

34. Calculus

Differentiate the function f(t)=1/4(t^4+8). My answer wa 4t^3. The book says t^3. What am I doing wrong,

35. alg

Solve: 2 / x - 1 - 3/4 = 5 / x - 1 a) -2 b) 2 c) 3 d) -3

36. US History II

Would anyone consider the inauguration of a president a movement, trend, or activities in economics?

37. college algebra

how to solve this problem. Completing the square. Find the value of a such that u^2-8u+a is a perfect square

38. college Algebra

Diameter of a circle.If the diameter of a circle is 1.3x10^-12 meters,then what is it's radius?

39. Physics

An electromagnetic wave has an electric field strength of 145 V/m at a point P in space at time t. A parallel-plate capacitor whose plates have area 0.109 m2 has a uniform electric field between its plates with the same energy density as the answer to part

Discuss the law of supply and demand. Do people follow this law? Why or why not? Provide specific examples. How are the prices set for the goods and services people consume? What control, if any, do you have as a consumer?

41. Math

(root2 + root3)^2 simplify

42. physics

two equally charged plates with finite length l is positioned side by side (parallel) and separated by distance d. what is the electric field intensity between the plates?

43. algebra 1

how do you solve the following questions using the substitution method? -3x-y=3 3x+6y=48 -3x-5y=-21 -5x+6y=32 2x+4y=12 4x+16y=8

asked by no one needs to know
44. Statistics

Why is it useful to know about the shape of set of numbers?

45. physics

carts of a roller coaster are travelling 5m/s over the top of the first hill. If there is no energy loss due to friction and the hill is 50m high,what speed will the carts have at the bottom

46. English

Obviously, the police will use force if you do not cooperate. Is this grammatically correct? I need to write a sentence to show how a comma should be used after introductory words or groups of words.

47. grammar

The informant, who will not be named, called in a tip last night informing police officers about an attempted robbery. The cold, dry, and ruthless wind lashed at their bare hands and faces. Are these sentences grammatically correct?

48. Physics

Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characteristic radiation characteristics?

Can you give me some websites to study for 3rd grade is these areas? Social Studies,English Language Arts, Math,Science

asked by ☻ Vanessa Sarafina ☻
50. Math

125489709/31472=?

asked by ☻ Vanessa Sarafina ☻
51. Prezident

Who was the 1st president America,how long?

52. Math

Find all integer roots of f(x). Identify any double roots. f(x) = 2x4 + 11x3 + 13x2 - 11x - 15

53. Math

Find all integer roots of f(x). Identify any double roots. f(x) = 3x4 - 16x3 + 31x2 - 26x + 8

54. English

Classes have also started at music school now. I go twice a week for piano. I'm continuing my tennis lessons. Oh yes, I've been moved up to the "older" group in tennis. Wednesdays I go to Auntie Mike's for English lessons. Tuesdays I have choir practice.

55. Nice???

w w w . a r t i s t s h e l p i n g c h i l d r e n . o r g / k i d s c r a f t s a c t i v i t i e s b l o g / 2 0 0 9 / 0 6 / t h e - h a n d b a g - a d d i c t i o n - s t a r t s - e a r l y - w i t h - a - f e l t - p u r s e /

asked by ☻ Vanessa Sarafina ☻
56. Math (Algebra)

I do not understand the following question or what to do to figure out the answer. Can anyone help explain this to me? Thank you. Describe what the graph of interval [-4,10] looks like?

57. grammar

Can someone please check the errors I have noted and let me know if they see more? I am supposed to find 20 errors but can only find 15!! Please help. The correction is in parentheses. Why are great numbers of students choosing to pursue their college

58. gometry

[3.05] In, angle C is (7x - 3) degrees and segment AB = (3x + 12)mm. Part a. What value of x would make equilateral? Part b. What is the perimeter or sum of the lengths of the sides of the equilateral triangle? Be sure to include the unit of measure in

59. american government

Ideological groups are distinct from single issue groups in a. the number of issues with which they are concerned. b. the intensity of their members’ opinions. c. their tendency to get involved in election campaigns. d. that members do not seek to

60. physics

A 1.9- block slides down a frictionless ramp, as shown in the figure. The top of the ramp is = 2.1 above the ground; the bottom of the ramp is = 0.40 above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance away.

61. college Chemistry

what is the amount of heat lost in KJ for 50 ml of water going from 70.0 degrees C to 1.0 degrees?

62. MATH HELP!!!

Given a right triangle with a side of length 4 and a hypotenuse of length 7, find the measure of the two acute angles. (Round to the nearest hundredth.)

63. chemistry

How to Convert 1 ton Of Steam (Pressure 24Kg/cm2) and ( Temperature 320 C) to K Mol?

64. teaching

can someone start me off or tell me how to start a narrative form of code of ethics. thanks in advance and happy holiday weekend.

65. AED 201

What steps are necessary to get you to your goals? What obstacles might you foresee and how will you overcome them? o What is one principle from the INTASC that you feel you must improve the most to be effective in the education profession? What existing

66. Geometry

B is the midpoint of Symbol for segment A C. . AB=5x+2 AC=12x-2 What is the value of BC? Show your work for credit. Line segment A C with point B on it.

67. Public High School AP Biology

I got a question that comes from the 1990 released test #61 that I'm completley lost on 61. In a population that is in Hardy-Weinberg equilibrium, the frequency of a recessive allele for a certain hereditary trait is 0.20. What percentage of the

68. xacc 280

If there has been anyone that has taken this class could get a little help. I am not looking for the answers just some more info. I am not understanding it. Instructions For each of the three situations, say if the accounting method used is correct or

69. English

Can you please tell me if I can include these questions (as they are) in a reading comprehension? Was the hotel in Mexico City as they expected it to be? How long was the flight delayed the day they left? What did the travel agency offer them a

70. physics

consider a solid metal ball with radius r and charge q. what is the electric field intensity at the center, anywhere inside the ball and anywhere outside the ball?

71. Physics

A certain freely failing object requires 1.70 s to travel the last 20.5 m before it hits the ground. From what height above the ground did it fall?

72. Grammar

This sentence: Without fully understanding the company's objectives. Should I use understand or understanding?

73. chem 121

how many grams of mgcl2 are contained in 255 ml of a 0.650M solutuin

74. math

for a strict triangular form, does it has to be in I matrice or just the main diagonal entries are all 1]\

75. cpu

lim x infnitive (4x-1/2x+9)

76. Chemistry

Hello, we recently did a lab in our chemistry class to analyze an Unknown amount Calcium Carbonate which was titrated with EDTA. Our titration results were: mass of the unknown CaCO3 was 0.172 g and the mL of EDTA added was 30.7. How do I find the percent

77. Chemistry

How many calories would be required to raise the temperature of 25.0 g of lead by 55.0 degree Celcius?

78. English

Can you tell me if it is correct to divide the two sentences this way? We really liked those places. Unfortunately, we didn't have any guide with us even if our brochure clearly said that an experienced guide would have accompanied us throughout our tour.

79. English

I really need to know if these sentences are OK. Thank youin advance. 1)What did the tour include? It included flights, full board accommodation and guided tours. 2)How long was the plane delayed the day they left? It was delayed till the next day. 3)Was

80. accounting

On January 2, 2006, Grant Corporation leases an asset to Pippin Corporation under the following conditions: 1. Annual lease payments of $10,000 for twenty years. 2. At the end of the lease term the asset is expected to have a value of$2,750. 3. The fair

81. Calculus

Find those values of x at which the tangent line is horizontal to the curve y=xsqrt2-2cosx

82. science

An irregularly shaped object has a mass of 67.5 If it is places into a graduated cylinder containing 50.0 ml water and the water level rises to 75.0 ml,what is the density of the object?

83. English

Thank you very much for your correction. Can you tell if this sentence is possible? 1) We really liked those places but unfortunately we didn't have any guide with us even if our brochure clearly said that an an experiences guide would have accompanied us.

84. earth and sun

express the distance of the earth from the sun using exponential notation

85. Calculus

differentiate the function R(x)=sqrt(10)/x^7

86. grammar

Could you please check the grammar in these sentences? Thanks. It was clearly her, right from the start. These are they, if I'm not mistaken. It always appeared to be them whenever there was trouble. The penalty against them brought coach Henson and I

87. Math

Use the following table of values to estimate the area under the graph of f(x) over [0, 1] by computing the average of R5 and L5. Table: x: 0 0.2 0.4 0.6 0.8 1 f(x): 51 48 46 43 41 38 I need help with this problem.

88. alg

In a permutation a) the selections are independent b) some items will never be used c) the order matters d) there must be at least 3 things to choose from

89. Math

Find the general antiderivative of f (x) and check your answer by differentiating. f(x) = x^5 + 9 Need Help.

90. MATH

Evaluate the indefinite integral. (Use theta for ƒÆ.) ç(8ƒÆ + cos(7ƒÆ))dƒÆ Ans: blank + C C is constant. How do I evaluate it?

91. government

yellow journalism, explain how the media may or may not influence American foreign policy? Basically, what affect can the media have on the government’s decisions?

92. chemistry

assuming the density of a 5% acetic acid solution is 1.0 g/mL, determine the volume of the acetic acid solution necessary to neutralize 25.0mL of 0.10 M Na)H. Also record this calculation on your Report Sheet.

93. Anatomy 2

In reference to high blood pressure-as a result in changes in the PNS and the SNS list two effects on the heart and one on blood vessels.

94. Statistics

The values 2.0, 3.7, 4.9, 5.0, 5.7, 6.7, 8.5, and 9.0 What is the median? 5.7 what is the mean?5.4 What is the mode?0 What is the range? But I am not sure how to find it????

95. Statistics

In a Gallup poll of 1038 adults, 540 said that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful? I am not to sure how to find the anwser???

96. Statistics

Why is it useful to know something about shapes of a set of numbers?

97. Statistics

What is use to measure central tendency in healthcare?