# jaz

Most popular questions and responses by jaz
1. ## Statistic

A statistic instructor randomly selected four bags of oranges, each bag labeled 10 pounds, and weighed the bags.They weighed 10.4, 10.9 , 10.8, and 9.9 pounds.assume that the distribution of the weights is normal. Find a 95% confidence interval for the

2. ## CHEMISTRY

Find the number of moles. a. 3.01*10^23 molecules H2O. b.1.000*10^23 atoms C. c. 5.5610 *10^22 ions Na^+.

3. ## chemistry

Find the mass in grams. a. 4.30 x 10^16 atoms He, 4.00 g/mol b. 5.710 x 10^23 molecules CH4, 16.05 g/mol c. 3.012 x 10^24 ions Ca^2+, 40.08 g/mol

4. ## chemistry help

Determine the number of moles of each specified atom or ion in the given samples of the following compunds.( Hint: the formula tells you how many atoms or ions are in each molecule of formula unit.) a. O atom in 3.161x10^21 molecules of CO2 b. C atom in

5. ## chemistry

DNA is approximately 2.5nm in length. IF an average man is 5ft 10 in. tall, how many DNA molecules could be stacked to extend from the ground to the top of the head of an average man.

6. ## math algebra

Fill in the missing numbers to complete the linear equation that gives the rule for this table. x y 2 22 3 33 4 44 5 55 y = x + Submit

7. ## Geometry

16 x squared + 25 y squared = 400

8. ## HHS

What is the molality of a solution in which 15g of I2 is dissolved in 500g of alcohol?

9. ## physics

The force shown in the figure below is the net eastward force acting on a ball. The force starts rising at t=0.020 s, falls back to zero at t=0.062 s, and reaches a maximum force of 55 N at the peak. Determine with an error no bigger than 25% (high or low)

10. ## ap stats

Continuous Random Variable, I Let X be a random number between 0 and 1 produced by the idealized uniform random number generator described. Find the following probabilities: a.P(0less than or equal to X less than or equal to 0.4) b.P(0.4 less than or equal

11. ## Math

Your parents took your family to dinner. Your parents wanted to give the waiter a 15% tip. If the total amount of the dinner was \$42.00. What should be paid to the waiter as a tip.

12. ## Physics

1. The mass of Kerry and the sledge together is 40 kg. Sam pushes with a force of 50 N for 4 s. a. What is the value of the quantity: (force x time) during which the force acts? 50 x 4 = 200 b. So what is the increased momentum of Kerry and the sledge? c.

13. ## math

can u please help me with this math problem. i don't get how to do this question. Mrs. Mabie has a rectangle swimming pool that measures 25 feet by 14 feet. She wants to have a cement walkway installed around the perimeter of the pool. The combined area of

14. ## chemistry

Mole and Particle practice How many representative particles (atoms, ions, molecules, etc) are present in each of the following? 1) 4.3 mol of tungsten 2) 2.45 * 10-6 mol nickel (II) selenide (NiSe) 3) 0.923 mol of selenium tetrabromide (SeBr4) How many

15. ## stats

A survey was done recently by the Royal Bank with Ipsos Reid (reported in Globe and Mail Aug 16 2010) about financial issues that university students face. (Data used here is based on that survey, but randomized to be still within the margin of error of

16. ## chemistry

The densities of the liquid and solid states of a substance are often similar. Explain.

17. ## stats need help

Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our schools?” Suppose that in fact 40% of all adults would answer “violence” if asked this question. The proportion p of the sample

18. ## math

Julian is interested in building a new house. Three architects have given him plans. The first plan is for a house that will be 2,250 square feet. The total cost of the house will be \$281,250. The second plan is for a house that will be 2,400 square feet.

19. ## math help

A survey was done recently by the Royal Bank with Ipsos Reid (reported in Globe and Mail Aug 16 2010) about financial issues that university students face. (Data used here is based on that survey, but randomized to be still within the margin of error of

20. ## pre calc

The terminal side of an angle in standard position goes through the poin (-2,5). Find the values of the 6 trig function sin cos tan csc sec cot

21. ## stats

Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our schools?” Suppose that in fact 40% of all adults would answer “violence” if asked this question. The proportion p of the sample

22. ## chemistry

A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial volume was 3.00 and the initial pressure of chlorine was 1.75 . The piston was pushed down to change the volume to 1.00 . Calculate the final

23. ## communication

within the workplace.......let's try to apply the health belief model to that environment......when you have a mix of cultures and socioeconomic status and perspectives.......how difficult is it to get folks to 'move' together? How much should each person

24. ## Independent and dependent events

A six-sided-cube is labeled with the numbers 1, 2, 2, 3, 3, and 3. Four sides are colored red, one side is white, and one side is yellow. Find each probability. Tossing 2, then 2. Tossing red, then white, then yellow.

25. ## science

When I push on my refrigerator, there is a force acting on it that wasn't there before. That means it should be experiencing an unbalanced force and begin to move. Why doesn't it?

26. ## American History

Which of the following was John Rolfe's chief contribution to Virginia's economy A. His alliance with the Powhatan through his marriage to Pocahontas B. His invention of a better way to grow short-staple cotton C. His innovations in cultivating tobacco D.

27. ## spanish 2

how do you say start, beginning, end, stay in spanish

28. ## history

Who were the first colonists in America?

What are the main formatting differences between the memo and the academic paper? In what ways do audience, purpose, tone, and structure affect the formatting of the memo and the paper?

30. ## communication

When someone weighs their response to a health issue that they are confronting, knowing that they need to go to one healthcare facility or another for treatment, or, one physician or another for care...........what impact does reputation and word of mouth

31. ## chemistry

Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?

Four quilters are preparing patches for a quilt. When finished, the quilt will contain 200 patches. The quilters’ contributions thus far are in the table below. Name Number if patches Lia 65 Brian 17 Elle 88 len 6 Find the probability that a randomly

33. ## stats need help

Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our schools?” Suppose that in fact 40% of all adults would answer “violence” if asked this question. The proportion p of the sample

34. ## Math

Suppose you work for the quality control department at Hewlett Packard. You know that ink jet cartridges are sometimes defective. The current defective rate is 8 cartridges per package of 100 (i.e. 0.08) What is the probability of sampling 12 cartridges

35. ## physics

A ferryboat traveling at a speed of 30 km/h attempts to cross a river with a current of 5 km/h. What is the boat's speed relative to the shore?

36. ## Math

The price of an electric fan increased by 25% to \$48.75. Find the original price of the fan.

37. ## geometry

Find the length of a side of a square whose perimeter and area have the same value. help? perimeter of a square is P=4s & the area of a square is A=s^2

38. ## Environmental Science

microorganisms can't break down plastics because... I'm stuck between a) plastics are made from oil d) plastics don't occur in nature. Both of them are true, but I'm not sure which is the most true.

39. ## summoner's tale

what is funny about the summoner's tale

40. ## Algebra

How do you factor x-5x^3-6x^3? Thanks!

41. ## Factoring

Can you show me how to factor x-5x^2-6x^3, and why each step is done? I'm not sure how to factor something where the x is in front instead of the highest power, and something with both a ^2 and ^3 variable. Thanks!

42. ## social studies

What does Ecuador plan to do on Infectious Diseases and what the United Nations plan to do>?

43. ## english 3

How can I compare Lord of the Flies to another work like a book or a movie? What should I inclued in the comparison in the powerpoint to make it creativity?

44. ## chemistry

Dose the law of conservation work when doing an expirement with vinegar and baking soda.

45. ## algebra II

Adding Rational Expressions 1. 4m-2/3m+2 + 6m -4/ 3m+2=

46. ## algebra need help

how do you put the following in y=mx+b 1. 19y-8=6x 2. 15x-12x=21

47. ## Math Statistics

Suppose you work for the quality control department at Hewlett Packard. You know that ink jet cartridges are sometimes defective. The current defective rate is 8 cartridges per package of 100 (i.e. 0.08) What is the probability of sampling 12 cartridges

48. ## math

Grandmother is 3 years younger than grandfather. Nine years ago, the sum of their ages was 105. How old are they?

49. ## Chemistry

When I push on my refrigerator, there is a force acting on it that wasn't there before. That means it should be experiencing an unbalanced force and begin to move. Why doesn't it?

50. ## history (presidents)

Which of the following lists of presidents is in correct chronological order? A. Roosevelt/Taft/Arthur/Wilson/Grant B. McKinley/Roosevelt/Johnson/Buchanan/Cleveland C. Jefferson/Monroe/Taylor/Harrison/Harding D. Coolidge/Hoover/Adams/Reagan/Lincoln E.

51. ## english

How important of a factor does money play in the lives and happiness of individuals? is this sentence grammatically correct?

52. ## Math

Please help solve and explain it, thank you. 1. Juan, Steve and Gabriella bought a total of 30 markers at an art store. Juan bought 3 more markers than Steve. Gabriella bought 7 times as many markers as Steve. How many markers did each buy? 2.

53. ## math

a student is painting one wall of a room. a square window is located in the middle of the wall to be painted. the window measures 3 feet on one side. the area of the wall, not including the window, is 80ft squared. find the height of the wall to the

54. ## English

what news of julilet does Romeos servant Balthasar bring?

55. ## Algebra

Explain why x^2 +5x + 8 is prime(not factorable) How do you know? Give 2 examples of a prime polynomial(can't be both binomials) Give 2 examples of polynomials that are not prime(they can't be both binomials),factor them,explain what you did to factor

56. ## spanish 2

How do you say ways to get around in spanish and directions around the city

57. ## Algebra

Why does 5x/6x^2 become 5/6x? How did x-x^2 become an x on the bottom? Thanks!

58. ## Algebra

How do you factor an x^3 as in x^3+5x^2+6? Is there a general rule you can follow?

59. ## SENIOR PROJECT IDEAS

What are some good topics for a senior project to do?

60. ## algebra

solve. 3x/2 + 8-4x/7=3

61. ## history

What other poets wrote about the Middle Passage besides Robert Hayden?

62. ## algebra II

permutation A “make-your-own-adventure” story lets you choose 6 starting points, gives 4 plot choices, and then has 5 possible endings. How many different adventures are there?

Suggest options for presenting information audience. Which method do you think is the most effective?

Between APA and MLA which is the most important Thank You

suggest 2 tips for academic document not mentioned in miccrosoft word.

66. ## english

What are other ways in which you can make use of the wealth of Web-based information and still guard against plagiarism?

67. ## thermodynamic

If the energy used to heat up a block of 2kg of copper is 115.8 kJ, what is the temperature it was heated to if the starting temperature was 100oC and the specific heat capacity is 386 J/kgK. please help. thanks

68. ## algebra

How come half the questions posted in here don't even get answered?

69. ## maths

in the fig ab = ad and ac=ae. prove that bc=de

70. ## alg2/trig

Which expression is defined for all real numbers? a) x + 3/x^2 b) 5/(x + 2)^2 c)4/(x − 2)^2 d)7/x^2 + 3

71. ## anatomy'

disease is an unhealthy state of a. organ system b.the entire body c. an organ d.all are true

72. ## math

solve the absolute value problem : 3x+|4x+5|=10

73. ## making a travel guide

i need help creating a powerpoint of a travel guide about flordia

74. ## Algebra

A few questions on simplifying rational expressions... 1). 15x^2/10x this simplifies to 3x^2/2 according to my book. But I would think it should be 3/2x since x^2-x=x. Why not? 2). Simplify 3xy/xy+x. How come the (xy)'s don't cancel so you are left with

75. ## Dividing Rational Expressions

x^3-8/x^2-4 divided by (x^2+2x+4)/(x^3+8). This becomes ((x-2)(x^2+2x+4)/(x+2)(x-2) times ((x+2)(x^2-2x+4))/(x^2+2x+4). I understand that (x-2)(x^2+2x+4)=(x^3-8) when I distribute it, however, if I didn't have the help of my book, I'd have no clue how to

76. ## COLLEGE LETTERS

why would you want a teacher to write you a college recommendation? WHAT ARE REASON WHY THEY WOULD BE A GOOD RESOURCE

77. ## pre calc

list the positivve integers between -3 and 7.

78. ## social studies

What does Ecuador plan to do about infectious diseases and what can the united nation do about it>

80. ## social studies

What does Ecuador plan to do on Infectious Diseases?

81. ## chemistry

Why are water molecules polar?

82. ## algebra need help

Determine whether the geometric series converges or diverges. 27 + 18 + 12 + 8 + . . .

83. ## algebra II

Determine whether the geometric series converges or diverges. 27 + 18 + 12 + 8 + . . .

84. ## pre calc

Find the complement and supplement of each angle. 1. 40 degrees 2. 89 degrees

85. ## algebra

Permutation For the lunch special, you can choose an entrée, a drink, and one side dish. How many meal choices are there

86. ## algebra help asap

Simplify: 5square root 9^10

87. ## algebra

solve and simplify 9^4/3 / 9^2/3

88. ## history

Who were the first colonists in America?

89. ## history

When did colonists first come to America?

90. ## chemistry

Classify the reactions (combustion, synthesis, decomposition, replacement, or double replacement) CaO9(s)+H20(l)¨ Ca(OH2(ag) Ca(ClO3)2(s)¨CaCl2(s)+O2(g)

91. ## algebra II

Adding Rational Expressions m/p^2 + 3/p^3 - 4

92. ## spanish

How do you say your uncle like to read and he is atletic?

93. ## spanish

what are some word that describe people in spanish

94. ## Math

What do we call the nunmbers that cannot be arranged ito 2-row arrays

how do you balance time between courses

How does an college degree relates to goals

What strategies can you use to incorporate effective visual elements into business presentations?

What does the MLA do and what does it mean?