# Questions Asked onJuly 7, 2012

1. ## math

Julie spent \$50 on a book. The cost of the book was \$24 less than twice what she spent on a backpack. How much did the backpack cost?.

2. ## math

compute the value of 0.2^-4 express answer numerically

3. ## Statistics

Answer the question Yes or No. Sam computed a 90% confidence interval for from a specific random sample of size n. He claims that at the 90% confident level, his confidence interval does not contain . Is this claim correct? Answer a. No b. Yes

One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts to be within ±0.005 inch of the length specified by

5. ## chemistry

A 0.115-L sample of an unknown HNO3 solution required 31.1 mL of 0.100 M Ba(OH)2 for complete neutralization. What was the concentration of the HNO3 solution?

6. ## Math

The sum of the ages of a brother and sister is 27. If four times the brother's age is subtracted from three times the sister's age, the difference is 11. Express your answer in terms of the symbols b and s. 27=?

7. ## Chem-help

What mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is mixed with 0.750 L of 0.290 M NaI? Assume the reaction goes to completion.

8. ## Statistics

What price do farmers get for their watermelon crops? In the third week of July, a random sample of 52 farming regions gave a sample mean of = \$6.68 per 100 pounds of watermelon. Assume that is known to be \$1.94 per 100 pounds. A farm brings 35 tons of

9. ## Statistics

(1) Gluten sensitivity, which is also known as wheat intolerance, affects approximately 15% of people in U.S. Let p be the proportion in a random sample of 800 individuals who have gluten sensitivity. Find the probability that the value of p is (a) Within

10. ## Statistics

What price do farmers get for their watermelon crops? In the third week of July, a random sample of 51 farming regions gave a sample mean of = \$7.08 per 100 pounds of watermelon. Assume that is known to be \$1.80 per 100 pounds. Find a 99% confidence

11. ## Chemistry

You mix 19.5 gallons of a mixture containing 12 wt% NaCl (sol'n density = 1.0837 g/cm^3) with V2-gallon sol'n that is 20 wt% NaCl (sol'n density = 1.1453 g/cm^3). Needed mixture is 19 wt% NaCl Whats the V2 in gallons? (all solutions are in water so just

12. ## math

I hope i am on the right track. Please look at my answer so I am doing correctly. The letters of the word mathematics are written on separate pieces of paper and put in a hat. What is the probability of drawing a vowel from the hat? (vowels are a, e, i, o

13. ## English

e.g. My father reads the newspaper every day. (What is the meaning of the sentence above? #1 or #2?) 1. My father reads the same/specific newspaper every day /repeatedly. 2. My father reads newspapers every day. He reads newly delivered newspapers every

14. ## physics

In Rutherford's scattering experiments, alpha particles (charge = +2e) were fired at a gold foil. Consider an alpha particle, very far from the gold foil, with an initial kinetic energy of 3.3 MeV heading directly for a gold atom (charge +79e). The alpha

15. ## Language Arts

What kind of poem is Humpty Dumpty? a. Narrative b. limerick c. nonsense

16. ## english III

In “Luke Havergal,” what relationship has existed between Luke and the speaker? A. They were sweethearts. B. They were mother and son. C. They were sister and brother.

If \$8,500 is deposited in a compound interest account paying 3.9% interest annually, how much will be in the account after 12 years? round to the nearest cent.

18. ## math

using exactly four 4s and only addition, subtraction, multiplication, and division, write an expression that equals each of the numbers from 1 to 10. you do not have to use all the operations, and numbers such as 44 are permitted

19. ## science

why does a wadded up foil sink

20. ## science

What is the hydroxide-ion concentration of a 0.240 M oxalic acid, H2C2O4, solution? For oxalic acid, Ka1 = 5.6 × 10–2 and Ka2 = 5.1 × 10–5. 6)

21. ## Statistics

True or False? As the degrees of freedom increase, the Student's t distribution becomes more like the standard normal distribution. Answer True False

22. ## Statistics

True or false? If the original x distribution has a relatively small standard deviation, the confidence interval for will be relatively short. Answer True False

23. ## Statistics

In the third week of July, a random sample of 61 farming regions gave a sample mean of = \$6.88 per 100 pounds of watermelon. Assume that is known to be \$1.72 per 100 pounds. A farm brings 30 tons of watermelon to market. Find a 98% confidence interval for

24. ## statistics

According to a website about salaries, the national average salary as of October 2003 for a human resources clerk was \$29,932. We assume that the annual salaries for clerks are normally distributed with a standard deviation of \$1,860. (Give your answers

25. ## algebra

Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). The difference between two numbers is 3, and the sum of those two numbers is 21. What are the two

26. ## calculus

Can some explain how to do this problem? I tried using derivatives...but...I keep getting a different answer from what my teacher told me! A projectile is fired directly upward with an initial velocity of 144 ft/sec and its height (in feet) above the

27. ## calculus

A point moving on a coordinate line has position function s. Find the velocity and acceleration at the t, and describe the motion of the point during the indicated time interval s(t)=-2t^3+15t^2-24t-6 [0,5]

28. ## chem 151

You need to dissolve CaCl2 in water to make a mixture that is 31.5% calcium chloride by mass. If the total mass of the mixture is 419.0 g, what masses of CaCl2 and water should be used?

29. ## statistics

mean cholesterol is 175mg/dl..standard deviation =20mg/dl assume approx normal distribution ..is varied. what percentage has a cholesterol level above 155mg/dl?

30. ## English

1. She goes skiing every winter. 2. She goes skiing in winter. (What is the difference between the two? Are both the same?)

31. ## Bio HELP!!!!

what is the name of the process throughh which polypeptides, polysaccharides or triglycerides are catabolised (broken down)?

32. ## MATH

Solve the following system of equations for the unknown variables. a + b = 7 a + c = 12 b + c = 15

I have a total of 100 questions and am unsure about my answers to these ones 3. Margaret is a customer of Tammy Company. The company wrote off her account of \$1,200 on August 15. On October 12, she sent in a payment of \$560. What will Tammy Company record

34. ## physics

suppose your car is on a 5% grade,if your car weighs 15,000N what is the component of its weight parallel to the road?

35. ## chemistry

What is the wavelength of a photon that has an energy of E = 4.01×10^-19J ?

36. ## Statistics

Total plasma volume is important in determining the required plasma component in blood replacement theory for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that sample of some

37. ## algebra

Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). The sum of two numbers is 36. Their difference is 4. Determine the two unknown numbers.

38. ## Chemistry

Distillation Scale up: In an experiment 100 lb-mol of 47 lb-mol % ethanol, 53 lb mol % water sol'n is fed into distillation column and separated into two streams: 100lb-mol 0.470 lb-mol ethanol 0.530 lb-mol water goes to: steam 1: 17 lb-mol 0.890 lb-mol

39. ## stat

Find the area under the standard normal curve to the left of z = 1.88, P(z < 1.88). (Give your answer correct to four decimal places.)

40. ## STATISTICS

An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 24.9 years of age. If the standard deviation is assumed to be 4.9 years, find the probability that a random sample of 33 U.S. women would

41. ## statistics

First graders who misbehave in school may be more likely to be regular smokers as young adults according to a new study presented in the July 2004 issue of the American Journal of Epidemiology. After following a group of U.S. first graders for 15 years, it

42. ## physics

Suppose a cars brakes can produce an acceleration of -7m/s^2. If the car is traveling at an initial speed of 28m/s, what is the minimum distance necessary to stop the car?

43. ## math

The end points of the diameter of a circle are P(-7,-4)and Q(-1,10).Find the coordinates of the center of this circle.

44. ## physics

1\ Acar is moving with acceleration 200 m in 50 sec reached to velocity 10 m\sec .what the total distance the car moved in 60 sec

45. ## statistics

An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 24.9 years of age. If the standard deviation is assumed to be 4.9 years, find the probability that a random sample of 33 U.S. women would

Basic Skills Survey???? I went on my school's website for 8th grade this what we be doing in september: English Diagnostic Basic Skills Survey Summer Reading Assessment Friendly Letter Review Business Letter i already know about the summer reading and

47. ## World History

The most common way the early river valley civilizations expanded was by. A. peaceful means. B. force of arms. C. political means. D. blending of cultures.

48. ## cjs/210

Will someone please help me find a website to find the answer to the following questions? What are the various functions of a police agency? Compare how the functions of a police agency differ at the federal, state, and local levels. What would happen if

49. ## math

Solve the following problems using Partial Quotients a. 7752/17 b. 651/3

50. ## geometry

Two rectangles are graphed on a coordinate plane, which number represents the scale used to enlarge Rectangle ABCD to Rectangle LMNO? Answer choices 1/2 1 and 1/2 2 4

51. ## English

Where is the gas station? 1. It's opposite to the flower shop. 2. It's opposite the flower shop. (Which answer is right? Are both OK? Then, which answer is commonly used?)

52. ## Physics

Modern bowling alleys have automatic ball returns. The ball is lifted to a height of 2.50 at the end of the alley and, starting from rest, rolls down a ramp. It continues to roll horizontally and eventually rolls up a ramp at the other end that is 0.700

53. ## history

Examine the effects of World War II on the American family.

54. ## Mat 117

John has decided that he wants a newer car. So, he headed to the dealership, and rather than purchasing a model with 0% interest, the salesman encourages him to look at some of the new model year vehicles, with the statement, “With the 5.9% interest,

55. ## Statistics

Total plasma volume is important in determining the required plasma component in blood replacement theory for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that sample of 61

56. ## History

What do the colours and the symbols on the Canadian flag represent?

57. ## economics

entrepreneur edward is planning to open a business selling ice cream. he knows that the price of ice cream is determined by the forces of supply and demand but wants a report outlining five specific events that can be expected to cause the equilibrium

58. ## calculus

How do I take the partial derivative of P with respect to r of the following: D ~ P = ‡”(t=1 to T)[t ~ (CF)_t/(1+r)^t ]

59. ## spanish

Could we walk Monday or Tuesday instead?

60. ## us history

compare and contrast early settler's relations with native Americans in early Virginia and new England, thanks!

61. ## statistics

An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 24.9 years of age. If the standard deviation is assumed to be 4.9 years, find the probability that a random sample of 33 U.S. women would

62. ## Foreign languages

I'd like you to revise these sentences. I need to include words really used when enquiring for a hotel room. Thank you very much,Writeacher. 1)My husband and I would like to spend the period from 3 August to 20 August at Your hotel. In particular, we are

63. ## Physics

When a mass is attached to a vertical spring, the spring is stretched a distance d. The mass is then pulled down from this position and released. It undergoes 53 oscillations in 30.6 s. What was the distance d? The answer is supposed to be 8.28 cm. How can

64. ## stats

A set of LSAT scores follows the normal curve. The average is 560, and the standard deviation is 60. Find the 80th percentile.

65. ## XMGT.216 / Ethics

I am needing workplace examples of ethical dilemmas involving a manager as a role model, everything I have searched so far on internet gives all other examples except this one, can you help?

66. ## physics

a 10,000hg car rounds a curve of radius 1200ft at 50mph what is its centripetal acceleration?

67. ## Physics

A 65kg box is sitting on a level surface, and a 208N force is pulling on the box to the right. find both the normal force and acceleration of the box

68. ## CJS/230

Will someone please hwlp me find a wesite to find the answer to the follwing questions? What is corrections accreditation? How does corrections accreditation affect the professional development of corrections officers? How can industry leaders plan for

69. ## Math

please help please show work so i can do others ok so i have to find the equation of the linethat contains given point and is parallel to the given line then write a slope intercept form if possible (8,-4) y=-1/2x+11 I also have to do the same for this

70. ## algebra

What is the answer for 4.(5)(5)-35+21-(-3)(-3)(-3)

71. ## Math

Why is the asymptote of the function in Example #1 y=2 ? ( y = 4x+3 + 2 )

72. ## medical coding

Which of the following code categories should be chosen over codes from other chapters for the same condition? A. Complications of pregnancy B. Neoplasms C. Blood disorders D. Metabolic and nutritional diseases 2. Pyuria or bacteria in the urine should be

73. ## physics

1\ Acar is moving with acceleration 200 m in 50 sec reached to velocity 10 m\sec .what the total distance the car moved in 60 sec

74. ## science

I have an older furnace dryer which is used for drying copper ore, it operates at a temperature of 1000-to 2500 degrees F.I have low concentrations of hydrogen sulfide in the area.My question is can sulfur dioxide be produced without the ore present at

75. ## math

give exact and approximate solution to the third decimal (x-6)^=18

76. ## Physics

A 100-g block hangs from a spring with k = 5.2 N/m. At t = 0 s, the block is 20.0 cm below the equilibrium position and moving upward with a speed of 216 cm/s. What is the block's speed when the displacement from equilibrium is 27.0 cm? The answer is 172

77. ## Grammar

Is the word MUCH a verb?

78. ## math

Michel is twice as old as his sister sylvia. In four years three times Micheal's age is equvialent to five times of sylvia's age. How old is Micheal now

79. ## science

step one of average pendulum was 38.0, 41.0, 35.0 period is 1.90 move bob back 15cm

80. ## Math

f(x) = (x - 0.6)2 + .66. turn into h/k form what is the quadratic regression equation using your calculator