Nancy

Popular questions and responses by Nancy
1. English

The team ___ won the game is my favorite. a)that b)who c)whom I chose a)that Now after reading it a few times sounds like b)who could have been the right one.

2. science

a 5.o kg book is sitting on a table. which describes the forces acting on the book? a)there are no forces acting on the book b)the net force on the book is zero Since the weight of the book is cancelled out by the support of the table. does that mean a)

3. Chemistry

A certain indicator, HA, has a Ka value of 1.3 × 10-6. The protonated form of the indicator is blue and the ionized form is red. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?

4. Ict

Uses Of Ict In Timing And Control

5. Maths

In an election there were 3 candidates 3/7 of the electors voted for the winner. The runner up received 5/8 of the remaining votes, what fraction of the electors voted for the third candidate

6. Math

One car is 3.9 meters long the other is 6%shorter How long is second car? What is the formula I use for questions involving %

7. Gr.11 Math

A large company has a phone tree to contact its employees in case of an emergency factory shutdown. Each of the five senior managers calls three eployees, who calls three other employees and so on. If the tree consists of seven levels, how many employees

8. math

A clerk spent his 35 hour work week as follows: 1/5 of his time in sorting mail; 1/2 of his time in filing letters; and 1/7 of his time in reception work. The rest of his time was devoted to messenger work. The percentage of time spent on messenger work by

9. english

Choose the correct comma placemnent for the sentence below> a. plump, old, white cat b. plump, old, white, cat c. plump, old white cat d. plump old white cat

10. Statistics

Suppose x is a uniform random variable with c=10 and d=90. Find the probability that a randomly selected observation exceeds26.

11. English

(1)Once the lecture starts:let your mind dart (2)ahead during pauses to anticipate what is next. (1) a) No change b)Once the lecture starts, let your mind c)Once the lecture starts; let your mind I chose b) (2) a)no change b)ahead (during pauses) c)ahead,

12. english

Which group of words is the sentence below misplaced? Having been discovered, Fifi looked up at his owner with puppy-dog eyes. a)with puppy-dog eyes b)been discovered c)his owner d)Fifi looked up

13. Math

A letter is chosen randomly from the 26 letters in the alphabet. Find the probability of choosing a consonant.

14. Human Resources

In 2003, a company employee received an option to purchase the company's stock at \$45 per share. If the stock is trading at \$40 a share in 2003, the employee will most likely... Is it to exercise the option, receiving a gain of \$5?

15. chemistry

Determine the final temperature when 10g of steam at 100C mixes with 500g of water at 25C. I have 4.184x 10(100-x) + 40700 x 10= 500 x (x-25) x 4.18. The book has 10/18 instead of 10 on left hand side of equation. Why??

16. Math

How many solutions does a consistent and dependent system of linear equations have?

A store had 896 swimsuits that were marked to sell at \$46.99. Each suit was marked down \$15.90. Find the reduced price using the formula M = S – N, where M is the markdown, S is the original selling price, and N is the reduced price.

18. Math

At a summer camp, one boy and one girl will be selected to lead the weekly activities. If there are 130 boys and 145 girls at the camp, how many different 2 person combinations of 1 boy and 1 girl are possible?

19. Physical Science

A bicycle pump contains 250 cm3 of air at a pressure of 90 KPa. If the air is compressed, the volume is reduced to 200 cm3. What is the pressure of the air inside the pump?

20. science(physics)

A powerful motorcycle can accelerate from rest to 28m/s in only 4 second . a.what is its average acceleration? b.how far does it travel in that time

21. maths

a carpenter has a board that is 8 ft long. he cuts off two piece.one piece is 3 1/2 ft long and other is 2 1/3ft long.How much off the board is left.

22. math

On a map of the Fox River, 1 centimeter represents 6.5 kilometers. If a trail by the river is actually 26.65 kilometers long, what is the length of the river on the map?

23. chemistry

I have: the half life of U-238 is 4.5 x 10^9 yr. A sample of rock of mass 1.6g produces 29 disintegrations per second. find percent by mass of U-238 in rock. I have 4.5x 10^9x60x60x365x24=1.419x 10^17= .693/1.419 x10^17 =4.883x10^-18 =rate 1.6/238=.006722

24. Chemistry

Why does equilibrium shift to the left when AgNO3 is added to the equation Co(H20)6 (aq) + 4Cl- (aq) CoCl4 (aq) + 6H2o(l)?

25. statistic

The amount of time a bank teller spends with each customer has a population mean of 3.10 minutes and standard deviation of 0.40 minute. If a random sample of 16 customers is selected, a) what assumption must be made in order to solve parts (b) and (c)? b)

26. Chemistry

A chemist ran the reaction and obtained 5.70 of ethyl butyrate. What was the percent yield? How do I solve this problem?

27. calculus

a toy wagon is pulled by exerting a force of 15 pounds on a handle that makes a 30 degree angle with the horizontal. find the work done in pulling the wagon 50 feet.

28. science

A car is moving at a speed of 72 km/hr. The radius of its wheels is 0.25m. If the wheels are stopped in 20 rotation by applying brakes, then angular retardation produced by the brakes is:

29. Math

Given the following information: current assets = \$400; fixed assets = \$500; accounts payable = \$100; notes payable = \$45; long-term debt = \$455; equity = \$300; sales = \$450; costs = \$400; tax rate = 34%. Suppose that current assets, costs, and accounts

30. Government

Which case would the the U.S. Supreme Court most likely agree to hear? A. A case involving the medical care a U.S. citizen received in Singapore after becoming ill with a respiratory virus. B. A case involving an issue that most of the federal courts of

31. Language arts

How should the United States government have behaved in dealing with the disputes between the Cherokees and the white settlers?

32. Chemistry

The triprotic acid H3A has ionization constants of Ka1 = 6.8× 10–3, Ka2 = 8.1× 10–9, and Ka3 = 5.0× 10–12. Calculate the following values for a 0.0760 M solution of NaH2A [H+] = ? [H2A-]/[H3A]= ? Calculate the following values for a 0.0760 M

33. Math

A bucket that weighs 3.2 pounds and a rope of negligible weight are used to draw water from a well that is 82 feet deep. The bucket is filled with 42 pounds of water and is pulled up at a rate of 2.3 feet per second, but water leaks out of a hole in the

34. english

choose proper punctuation George, leave the room, shut the door, and be quiet b)George;leave the room, shut the door and be quiet c)George leave the room, shut the door and be quiet d)b)George leave the room, shut the door, and be quiet My first guess is

35. Chemistry

How many moles of ions are released when these samples are dissolved in water? a. 0.37 mol of NH4Cl b. 3.55 * 10^18 formula units of Ba(OH)2 * 8H2O I need to know what steps to take to get to the answer. Thanks!

Can anyone please download the prep guide for the nystce exam for me? My computer isn't compatible and I need it a.s.a.p. Thanks in advance.

37. Physical Science

A hiker, of mass 80 kg walks up a mountain, 700 m above sea level, to spend the night at the top in the first overnight hut. The second day she walks to the second overnight hut, 400 m above sea level. The third day she returns to her starting point, 200 m

38. physics

A dart leaves the barrel of a blowgun at a speed v. The length of the blowgun barrel is L. Assume that the acceleration of the dart in the barrel is uniform. If the darts exit speed is 17 m/s and the length of the blowgun is 1.10 m, find the time the dart

39. chemistry

state the separation technique for silver choride and sodium trioxonitrate

40. Chemistry

What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA–, A2–) at pH 7.22?

41. psychology

For finals week, you had to be prepared for exams in english,math,spanish,italian,and history. how should the sequence of study be arranged to minimize the possibility of interference

42. physics

Factory Worker A is exposed to a sound of a constant intensity of 6.30 × 10–4 W m–2 at a distance of 1.00 m from a noisy machine. The frequency of the sound is 4.00 kHz. (a) What is the sound level in decibels (dB) of this sound? (b) By what factor

43. physics

A racing dog is initially running at 20.0 m/s, but is slowing down. Question: How fast is the dog moving when its kinetic energy has been reduced by half? Question: By what fraction has its kinetic energy been reduced when its speed has been reduced by

44. statistics

The average math SAT score is 500 with a standard deviation of 100. A particular high school claims that its students have unusually high math SAT scores. A random sample of 50 students from this school was selected, and the mean math SAT score was 530. Is

45. Math

What is the volume of a sphere with a radius of 5 cm?

46. Science

Why is the formation of iron hydroxide, Fe(OH)2, from Fe2+ and OH- not considered an oxidation-reduction reaction?

47. Science

Methanol reacts with carbon monoxide in the presence of a catalyst to produce ethanoic acid. Reacted completely with carbon monoxide in a reaction vessel. What is the theoretic yield of ethanioc acid?

48. Statistics

The table to the right lists probabilities for the corresponding numbers of girls in three births. What is the random​ variable, what are its possible​ values, and are its values​ numerical? Number of girls x ​P(x) 0 0.125 1 0.375 2 0.375 3 0.125

49. Pre-Calc with Analytic Geometry

Function : y=cot(2x+pi) 1)determine the interval for the principal cycle. (Type this answer in interval notation) 2)Then for the principal​ cycle, determine the equations of the vertical​ asymptotes. 3)find the coordinates of the center​ point. 4)

50. Physics

Two charges repel each other with a force of 10-6N when they are 10cm apart. when they are brought closer together until they are 2cm apart the force between them becomes?

51. Math

The scores of students on standardized test are normally distributed with a mean of 300 and a standard deviation of 40. Between what two values do 99.7% of the test scores lie?

52. Chemistry

2 NaN3(s) = 2 Na(l) + 3 N2(g) How many grams of NaN3 are needed to produce 20L of N2(g) at 303K and 776mmHg?

53. Trig

A plane has a speed of 250mph and flies with a bearing of N35degE. The wind is blowing from the west at 25 mph with a heading of due east. What is the actual speed and heading of the plane? Round to one decimal place.

54. chemistry

The escape velocity from earth is 2.5 x10^4 miles per hour. What is this speed in m/s? (1 mile 1609 m)

55. Psychology

One way to measure the validity of test would be to:

56. Chemistry

This question has been bugging me for a long time. A rock contains a Pb-206 to U-238 mass ratio of .145 to 1.00. Assuming that it did not contain any Pb-206 at the beginning of its formation, determine its age. I assume from the other problems in my book

57. Math

On friday, a computer was priced at \$800. on the following wednesday, the price was reduced by 15%. On the following friday, the price was further reduced by 20%. what percent of the original price was the final price ?

58. chemistry

Find the number of disintegrations per minute emitted by 1.1 mol of 232-Th in 1 min. The half-life of 232-Th is 1.4 x 1010 year I was able to do this with the following technique: 1.1 x 6.022 x10^23 =6.62x10^23 1.4x10^10=7.358x10^15 minutes I think then it

59. statistic homework

If 55% of a television viewing population watched a program called ¡§Name that Poem¡¨ one evening, what is the probability that, in a random sample of 100 viewers, less than 50% of the sample watched the program?

60. Math

Kosuke wrote a mathematics contest consistingof 25 multiple choice questions, the scoring system gave 6 points for a correct answer, 2 points for not answering, and 1 point for an incorrect answer.Kosuke got x correct and left y unanswered questions a)

61. earth

Why is the Earth's atmosphere rich in oxygen and poor in carbon dioxide?

62. british literature

review the metrical feet box on page 35 in your study guis and the model of scanned poem in your textbook page 42. then ,scan the following sonnet 73. mark the syllables, separate the feet with shorts vertical lines, and indicate the rhythem scheme that

63. physics

A constant horizontal pull of 8.25 N drags a box along a horizontal floor through a distance of 19.1 m. Q How much work does the pull do on the box? Ans: i got the answer as W = 158 J But i have problem with the second question? Question: Suppose that the

64. 3rd gr math

tyrell says \$750 is about \$800. Sara says \$750 is about \$700. Who is correct? Explain? Its number sense.

65. Calculus

Find all critical points of the function. f(x) = xe^3x so x= ? Show steps or tell me how I find them?

66. Calculus

Find the surface area formed by revolving the graph of f(x)=81-x^2 on the interval [0,9] about the y-axis. (express the answer in terms of pie.)

67. Accounting

The question is: Compute the recent two years’ cash flow on total assets ratios for this company. This is the info given: Operating cash flow for current year (in millions): \$1,762 1 year prior - \$1,740 2 years prior - \$1,981 Total Assets for current

68. Physics

How many times will the incident beam shown in Figure P25.3 (x = 1.90 m, y = 1.30 m) be reflected by each of the parallel mirrors? mirror on the right

69. Physics

A daredevil plans to bungee jump from a balloon 64.0 m above a carnival midway. He will use a uniform elastic cord, tied to a harness around his body, to stop his fall at a point 10.0 m above the ground. Model his body as a particle and the cord as having

70. Math

Joe is playing a game with a regular die. If the number that turns up is even, he will gain 5 times the number that comes up. If it is odd. He will lose 10 times the number that comes up. He tosses a 3. Express the results as a integer.

71. PHYSICS CENTER OF MASS

A thin rectangular plate of uniform areal density σ = 2.79 kg/m2 has length of 37.0 cm and width of 23.0 cm. The lower left hand corner is located at the origin, (x,y)= (0,0) and the length is along the x-axis. (a)There is a circular hole of radius 8.00

72. Math

You are building a frame for a photograph that is 8 inches by 11 inches. The width of the frame must be uniform around the picture and you have 42 square inches of wood to use. What is the width of the frame?

73. com200

The term ________________ describes a wide range of common and nonstandard English, including jargon, colloquialisms, idioms, and slang.

74. Math

Suppose 1% of the population is known to have a medical condition. There is a test for the condition, and 80% of people with the condition test positive for it. Also, 10% of people without the condition test positive for it. Follow these steps to find the

75. chemistry

If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon

76. Math help

You plan to make 24 equal quarterly payments (payments are at the end of each period) into an account to pays 8% (per year compounded quarterly). If you need \$5,000 at the end of 10 years (i.e. 4 years after the last payment is made into the account), how

77. chemistry

An alternative approach to bomb calorimetry is toestablish the heat capacity of the calorimeter, exclusive of the water it contains. The heat absorbed by the water and by the rest of the calorimeter must be calculated separately and then added together. A

78. chemistry

Household bleach contains (NaClO)2 that decomposes in water, NaClO + h2o = Na+ + OH- + Cl2 + O2 If 15ml bleach containing 5.85℅ NaClO is allowed to decomposes completely, then !@#\$%^& many mL of o2 at 22C and 755mmHg can be liberated. Density of bleach=

79. Chemistry

The half life of U238 is 4.5 x 10^9 yr. A sample of rock of 1.6 g produces 29 dis/sec. Assuming all radioactivity is due to U238 find percent by mass of U 238. I have tried ln(t)/ln(0)= -kt and still cannot get the answer What I get is A) 4.5x10^9

80. Pre-Algebra

Find 3 consecutive positive integers such that the product of the first and third, minus the second, is 1 more than 5 times the third.

81. Psychology

Professor Webb is interested in conducting a study on gender differences and coping with stress. He should begin his research by examining:

82. Chemistry- rate laws

CH3CHO decomposes into methane gas and carbon monoxide gas. This is a 2nd order reaction. Rate of decomposition at 140 degrees Celsius is .10M/s when the concentration of CH3CHO is .010. What is the rate of the reaction when the concentration of CH3CHO is

83. Algebra 2

A farmer has 120 ft. of fencing available to enclose 2 adjacent rectangular pens alongside his barn. NO fencing is required along the bard side. He needs to have a total of 930 sq.ft. Determine the width (x) and the combined length of the pens. There are

84. Algebra 2

(4x^4-4x^2-x-3)divided by(2x^2-3) quotient an remainder?

85. Math

a chemist has an 18% acid solution and a 36% acid solution. How many liters of each of these solutions should be mixed together to make 24L of 30% solution? Enter two numbers separated by a comma

86. psychology

Susan Sharp is a 35year old lady who has recently been diagnosed with diabetes.She is overweight and smokes.She is aware that she does not have a healthy lifestyle but finds it hard to resist fast foods and alcohol.She is a single parent of two young

87. algebra

(-6^2 + 2v + 4) - (6v^2 + 4)= Is the solution: 12v^2 + 2v?

88. physics

When the thigh is fractured, the patient's leg must be kept under traction. One method of doing so is a variation on the Russell traction apparatus. (See the figure.) Please place period in place of (dot) oi53(dot)tinypic(dot)com/2a0b7yx(dot)jpg If the

89. science

a certain's plant root contain higher concentrations of nitrate than the soil that surrounds them. Which mechanism explains the movement of nitrates form the soil into the plant's roots? a)osmosis b)facilitated diffusion c)active transport d)filtration I

90. ENGLISH

You'll be alert, engrosed in the (14)material.And concentrated 100 percent. a) no change b) material, and c) material; and d) material and After reading it over and over, I think b) a comma after material would be the correct answer. I think this is a

91. chemistry

The thermite reaction is a very exothermic reaction; it has been used to produce liquid iron for welding. A mixture of 2 mol of powdered aluminum metal and 1 mol of iron(III) oxide yields liquid iron and solid aluminum oxide. How many grams of the mixture

92. math

F=Gm1m2/r^2, for G

93. physics

A fly lands on one wall of a room. The lower left-hand corner of the wall is selected as the origin of a two-dimensional Cartesian coordinate system. The fly is located at the point having coordinates (1.80, 1.15) m. (a) How far is it from the corner of

94. 8th Algebra

What are some real-life examples of exponential growth and decay?

Which is correct? The functional resume is for which? 1. entry-level job seekers 2. job seekers with employment gaps 3. professionals wishing to highlight industry-specific experience 4. emphasizes a steady employment record Thank you for using the Jiskha

96. Physical Science

A bicycle pump contains 250 cm3 of air at a pressure of 90 kPa. If the air is compressed, the volume is reduced to 200 cm3. What is the pressure of the air inside the pump? V1 = 90 and V2 = P1= 250 cm and p9= 200 P1V1 = p2V2 V2=p1V1/p2

97. math

Translate this sentence into an equation. 23 less than Matt's score is 66. Use the variable m to represent Matt's score.

98. Math

Using ruler and a pair of compasses only construct a quadrilateral ABCD with |AB|=9cm, |BC|=10cm, |AD|=7.5cm, angle ABC =45°and angle BAD =135°