# sha

Most popular questions and responses by sha
1. ## math

how many diferrent 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS? the ans. must be 90,720

2. ## math

if E and F are independent events, find P(F) if P(E)=0.2 and P(E U F)= 0.3

3. ## statistics

An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140

the purchasing power (in dollars) of an annual amount of A dollars after t years of 5% inflation decays according to P= Ae^-0.05t a) how long will it be before a pension of \$60,000 per year has a purchasing power of \$30,000 b) how much pension A would be

5. ## chemistry

what is thbe total number of molecules of so2 in a 0.10 mole same of so2

6. ## Science

What is the IUPAC name FOR CH3COOC2H5

7. ## physics

a ball dropped from rest at a height of 50 m above the ground. (a) what is the speed just before it hits the ground? (b) how long does it take to reach the ground?

8. ## eng.

Which of these statements is true? a) Sensory details distract readers; therefore, writers should avoid using them. b) Sensory details show readers that the writer is a sensitive person. c) Sensory words make writing come alive because we understand the

9. ## Physics

Richard is driving home to visit his parents. 130 mi of the trip are on the interstate highway where the speed limit is 65 mph . Normally Richard drives at the speed limit, but today he is running late and decides to take his chances by driving at 80 mph .

10. ## finitemath

a store sells cashews for \$5.00 per pound and peanuts for \$1.50 per pound. the manager decides to mix 30 pounds of peanuts with some cashews and sell the mixture for \$3.00 per pound. how many pounds of cashews should be mixed with the peanuts so that the

11. ## Chemistry

The standard free energy change, delta f G, for the formation of NO (g) from its elements is +86.58 kJ/mol at 25 degrees C. Calculate Kp at this temperature for the equilibrium 1/2 N2(g) + 1/2 O2(g) = NO(g) Comment on the sign of delta G and the magnitude

12. ## math problem

In a raffle 1000 tickets are being sold at \$1.00 each. the first prize is \$100, and there are 3 second prizes of \$50 each. by how much does the price of a ticket exceed its expected value?

13. ## Chemistry

Balance the redox equation. It occurs in acid solution. Sn(s) + H+(aq) = Sn2+(aq) + H2(g) I understand that first the equation needs to be put into halves. Sn(s) = Sn2+(aq) and H+(aq) = H2(g) Then, Sn(s) = Sn2+(aq) + 2e- and ? From here I am lost. Please

14. ## probability. review questions

1)what is the probability that a seven-digit phone number has one or more repeated digits? 2) five letters, with repetition allowed, are selected from the alphabet. what is the probability that none is repeated?

15. ## math

felix has 2 yards of ribbin. He needs 1/4 yard to make 1 bow. how many bows can felix make?

16. ## math

LOGIC: I plus onehalf of square plus zero plus onehalf of diamond plus center of the sea plus threefourth of X plus zero plus center of the sun?

17. ## chemistry

What is the molar mass of an acid if 0.422 g of the acid are neutralized by 17.5 mL of 0.268 M NaOH?

18. ## probability

how many different 10-letter words (real or imaginary) can be formed from the letters in the word MONOCHROME?

19. ## math

after twelve monthly deposits of \$400 at 12% compounded monthly, find the amount of an annuity. please help me:(

calculate the exact and ordinary number of days a) from 12 February 2012 to 26 August 2012

21. ## MS office Acess 2007

Determining Table Fields Which should not be included as fields in a table? Choose all that apply. A - Small fields B - Region fields C - Yes/No fields D - Calculated data E - Numbered fields F - Separate name fields

22. ## acct.

how will I journalize this transaction? Rented a backhoe to Mission Landscaping at a price of \$250 per day, to be paid when the backhoe is returned. Mission Landscaping expects to keep the backhoe for about two or three weeks

23. ## math

Thomas in 4 hours. Julia can do the same job in 6 hours. How many hours will it take the two of them to do the job if they work together?

24. ## math

how many different 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS?

25. ## Algebra II

An office building containing 96,000 square ft of spaceis to be made into apartments.There at most 15 one bedroom units,each with 800 square ft of space. The remaining units each with 1200 square ft of space,will have two bedrooms. Rent for each one

26. ## Physics

When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.6 m/s in 0.11 s .

27. ## financial acct

how will I journalize this transaction? Rented a backhoe to Mission Landscaping at a price of \$250 per day, to be paid when the backhoe is returned. Mission Landscaping expects to keep the backhoe for about two or three weeks

28. ## probability

you are to set up a code of consisting of three letters (A to Z) and five numbers (0 to 9). a) how many codes are possible if the letters and numbers can be repeated? b) how many codes are possible if each letter and digit can be only used once? c) how

29. ## math problem

two cards are drawn at random (without replacement) from a regular deck of 52 cards a) what is the probability that the first card is a heart and the second is red? b) what is the probability that the first card is red and the second is a heart?

minimize z= 5x + 9y subject to 6x + y >= 18 2x + 3y >= 30 x= 0 find the corner points, ans subject the objective function to the corner points, finding the minimum value of z giving the constraints. i know the first and second points but i couldn't figure

31. ## Chemistry

The following reaction is reactant-favored at equilibrium at room temperature. COCl2(g) = CO(g) + Cl2(g) Will raising or lowering the temperature make it product-favored?

32. ## Chemistry

Which substance has the higher entropy? a.) a sample of pure silicon (to be used in a computer chip)or a piece of silicon containing a trace of another element such as boron or phosphorus b.) O2(g) at 0 degrees C or O2(g) at -50 degrees C c.) I2(s) or

33. ## math prob.

the purchasing director of a bank has just received a shipment of 100 printers. She has been told that the shipment includes 5 defective printers. She randomly selects two printers and tests them. If both printers work the purchasing director accepts the

34. ## stats:find the mean

please help! i know exactly how to find the mean but i am having a problem finding the midpoints. couldn't get them right :( salary employees 5,001- 10,000 == 16 10,001-15,000 == 15 15001-20,000 == 11 20,001-25,000 == 15 25,001-30,000 == 23

35. ## Math

evaluate: (log5 20^4)(log20 5^4) I don't get it

36. ## math

Good 1 Steve so I sux at math but your here :) Heres another: X = [students playing football], Y = [students playing baseball], and Z = [students playing rugby]. Draw a Venn diagram of Z – (X U Y), and write a sentence describing what the set represents:

37. ## Chemistry

Balance The Following Equations. _SnO2+_Ba(OH)2->_Sn(OH)4+_BaO _Al(OH)3+_(HG2)3_Po4)2->_AlPO4+_HG2(OH)

38. ## Chemistry

Balance the Following Equations. _MgSo3+_HNO3->_Mg(NO3)2+_H2SO3

39. ## math

Assume that the student has a cup with 14 writing implements: 7 pencils, 5 ball point pens, and 2 felt-tip pens. How many such subcommittees are possible if each subcommittee must contain at least 1 and no more than 2 Republicans?

40. ## math prob.

Through a mix-up on the production line, 6 defective refrigerators were shipped out with 44 good ones. if 5 are selected at random, what is the probability that at least 2 of them are defective? ty in advance!!

41. ## Algebra II

find the area of triangle ABC if A=56 degrees, b=20 ft, and c=12 ft. Round to the nearest tenth.

one of the roots of the equation x^2 - 2qx + 2q +4 = 0 is three times the other root, determine the value q

43. ## science

a scientist has two samples of a substance. both samples have the same temperature. one sample has a mass of 10 g. the other sample has a mass of 20 g. compare the average kinetic energy and total kinetic energy of the particles in each sample.

44. ## Phar Science

In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for

45. ## Phar Science

The following data were obtained for solutions of carboxymethylcellulose flowing through a capillary viscometer. Concentration (g/L) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.8 Time (s) 64.2 68.4 72.7 77.1 81.5 86.1 91.0 100.5 The Mark-Houwink-Sakurada parameters for

46. ## math

the perimeter of a rectangular floor mat is 42 inches, if the width is 9 inches, what is the length?

47. ## English help

it is second paragraph. I want to tell you English is my second language.I try my best to do it in right way . After the death of Enkidu .He asks him self does this mean I have to die too? This thinking changes his direction. It is not doubt to say that

set up the linear programming problem. Do not solve. A brewery manufactures three types of beer-lite, regular and dark. Each vat of lite beer requires 6 bags of barley, 1 bag of sugar, and 1 bag of hops. Each vat of regular bear requires 4 bags of barley,

49. ## math..help?

from 1500 lottery tickets that are sold,3 tickets are to be selected for first, second, and third prizes. how many possible outcomes are there?

50. ## Math

graph the function: y = 4 sin 2 theta

51. ## Algebra II/ Trig

Should the triangle be solved beginning with Laws of Sines or Laws of Cosines. Then solve the triangle and round to the nearest tenth. a=16, b=13, c=10 I got this answer but it is wrong and don't understand where I made the mistake. a=16, b=13, c=10

52. ## Alge2/trig

Should the triangle be solved beginning with Laws of Sines or Laws of Cosines. Then solve the triangle and round to the nearest tenth. a=16, b=13, c=10

53. ## math

determine whether y=1.5(1/6)^x represents exponential growth or decay

54. ## Algebra

use synthetic division to find (2x^3 -5x^2 +7x-1) divided (x-1)

55. ## physics

a car moving at 30 m/s slows to a speed of 10 m/s in a time of 5 s. determine a.) the acceleration of the car (b). the distance it moves in the third second.

56. ## algebra

seven more than twice a certain number?

57. ## math

If a plant has a linear growth rate and 1 day after planting is 2x+4 and day four is 4x+8 Wgat is the growth rate?

58. ## math

Steve earned scores of 96 and 87 on his first two exams. What will his average grade be if he gets a 72 on his third exam?

59. ## painting

compare and contrast the representation of weight and space in the painting of The Good Shepherd in the Catacomb of Saints Pietro and Marcellino (Image 15-2) and the mosaic of Justinian and Attendants in Ravenna's Church of San Vitale (Image 15-5)

60. ## physics

2 masses are connected through a non-stretchable string that passes over a frictionless pulley. The masses of the objects are 12 kg and 5.5 kg respectively. The obj with larger mass is hanging 2.5 m fr the surface of a table. Suppose that the two objs are

61. ## Phar Science

In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for

62. ## writing

use the word girls in a sentence

63. ## acct

which account will not appear on an after -closing trial balance?

64. ## math

A sample of 8 persons is selected for a test from a group containing 40 smokers and 15 nonsmokers. in how many ways can the 8 persons be selected?

Using only the digits 0 an 1, how many different numbers consisting of 8 digits can be formed?

66. ## eng

can anyone check my grammar please? The main problems Arnold Schwarzenegger must focus on are the immigration issues, college tuition costs and high unemployment.

67. ## english

what comes next after the topic sentence?

68. ## concrete

can anyone define and give me examples of "concrete details" please?

69. ## fintemath

dimension of a floor; the perimeter of a rectangular floor is 90ft. find the dimensions of the floor if the length is twice the width

70. ## Math

I checked the problem but I didn't understand the answer how could you do?, because what happened with the fractions? Estimate the result of the following problem as a whole number: 4 1/43+2 15/16 -1 24/26+ 5 11/12 -3 3/61 Can you explain me, please....?

71. ## science

Which is an invertebrate? a-eagle b-fish c-snake d-shrimp

72. ## science

why don't soft animals like sponges cnidarians live on land?

73. ## trig

Which expression is equivalent to tan theta - sec theta/sin theta? A)-cot theta B)cot theta C)tan theta-cot theta D)tan theta-sec^2theta

74. ## science

what is an example of a chemical reaction.

75. ## math

what is the equation of a line parallel to the given line and passing though the given point y=x+4 ;(-7, 1)

76. ## math

ab and ac are tangents to a circle with centre o. if angle bac is equal to 40 degree, find angle abc and angle acb.

77. ## Add maths form 4

The quadratic equation 2qx(x+1)-8x^2-1, where q is a constant, has no real roots. Find the range of values of q. Answer given is -2

78. ## Add maths form 4

Given that the quadratic equation hx^2 - 4kx + 9h =0 has two equal roots, find the ratio h:k The answer given is 4:6. I need to know the method pls... Thx in advance

79. ## math

Find the intersect point for the two equations: x = 2; y = -3

80. ## human body

a friend has been taking over-the-counter vitamins and minerals because he heard that some of them can boost energy levels and immune system function. he begins experiencing fever, nausea, and recurrent kidney stones. based on these symptoms, what might

81. ## Math

Provide an example of at least five ordered pairs that do not model a function. The domain will be any five integers between 0 and 20. The range will be any five integers between -10 and 10. Why does your example not model a function?

82. ## chem

how many mL of a .094 M NaOh are needed to neutralize 21.4 mL of .160 M HCL

83. ## Phar Science

A researcher in Urumqi drops a rhodium ball of diameter 4.20 mm through a dilute aqueous solution of a high molar mass natural gum contained within a glass tube which has four graduations marked 10 cm apart. It is 18 C in the laboratory and the ball takes

84. ## math

Page 9 of 9 What is the probability that a point chosen at random on segment PQ will be between -1 and 3? -5 through 5

85. ## Public Finance

Your state has a retail sales tax of 10 percent but it exempts food, prescription drugs, and all services including housing services, repair services, and consumption of electricity and other public utility services. Use supply-and-demand analysis to

86. ## Public Finance

Explain why using the local property tax to finance a given quantity and quality of public schooling can result in low tax rates in rich jurisdictions but high tax rates in poor jurisdictions. How do state governments supplement local finance of education

87. ## Philsophy

How the majority can have intransitive preferences without anyone's preferences being intransitive?

88. ## Ethics

How there can be an ethics which does not focus on right action? can anyone help me figure out what this question means and/or how to answer it? thanks in advance!

89. ## research paper

Is fast food a good topic for research paper?

90. ## math

the withdrawal is to be \$500 per month for 36 months at 10% compounded monthly, find the present value of annuity.

91. ## math

how will you solve these equations using matrices x+y=1 and 3x-2y=4/3

92. ## Math

Estimate the result of the following problem as a whole number: 4 1/43+2 15/16 -1 24/26+ 5 11/12 -3 3/61 Thank you for helping me.

93. ## child development

discuss three different ways a teacher can foster syntactic or semantic development in students. Provide a classroom example of each

Who is Ra the king of the gods?

95. ## trig

Which expression is equivalent to tan theta-sec theta/sin theta? I don't get this

96. ## math

evaluate: [12 5 -2] [-3 0 1] [-5 4 2] what does it mean to evaluate a matrice

97. ## math

Triangle DEF with vertices D(2,5), E(1,-6), and F(-5,3) is translated 3 units right and 2 units down. Find the coordiantes of DEF.

98. ## Algebra II

write an equation for the line that passes through (0,7) and is perpendicular to the line whose equation is y=1/2x-1

99. ## science

what might be some clues that would help us know whether or not the change is chemical.