# Questions Asked onJuly 28, 2012

1. ## Physics

A small car (mass 380 ) is pushing a large truck (mass 1000 ) due east on a level road. The car exerts a horizontal force of 1580 on the truck. What is the magnitude of the force that the truck exerts on the car?

2. ## Hypothesis - Statistics

At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a

3. ## statistics

Expected relative frequency probability represents a calculated probability based on large numbers of trials. In an example of a deck of 52 cards, where you randomly pull cards from the deck and record what they are, you find that over 1000 random draws,

4. ## statistics

An extreme score that sets apart in value from the general distribution of values with which it is connected is known as…?

5. ## math

A radio transmission tower is 170 feet tall. How long should a guy wire be if it is to be attached 7 feet from the top and is to make an angle of 30° with the ground? Give your answer to the nearest tenth of a foot

12. ## Physics- Repost (Answer did not make sense)

In the circuit below, at time t = 0, the switch is closed, causing the capacitors to charge. The voltage across the battery is 12 V The circuit: flickr. com/photos/ 68751220@N03 /6848519773/ A)Calculate the time constant for the RC circuit B)Calculate the

13. ## chem 1

Okay there is a question in my book, but go figure it's one that doesn't have the answer in the back of the book for me to check my answer. it says predict the effect each change has on the solubility of (1)Na2CO3(s); (2)N2(g) a. increase in temperature b.

14. ## statistics

(3,5,7,9,11)U(3,6,9,12,15) would correctly be expressed as

15. ## Physics

Three masses that are 10 kg each are located at the corners of an equilateral triangle, with side length of 0.55m. What is the magnitude of the total force acting on one mass due to the other two masses? The answer is supposed to be 3.82e-08 N. Any help is

16. ## statistics

According to a Harris Interactive poll conducted in 2009, 20% of American adults smoke. In a random sample of 500 American adults, what is the probability that no more than 100 smoke?

17. ## Persoanl finance

1. Jenny Franklin estimates that as a result of completing her master’s degree, she will earn $7,000 a year more for the next 40 years. a. What would be the total amount of additional earnings? 40 yrs * 7,000/ yr =$280,000 I don't understand how to get

18. ## design

1. A person with a square face shape and a rectangle body shape has what bodyline? A. Straight B. Sharp-straight.(yes) C. Soft-straight D. Soft-straight II 2. A suit with rounded lapels and a shawl collar would work best for a woman with a _______

19. ## Health

The U.S. government categorizes body weight status as ________. A. Underweight, healthy weight, overweight, obese B. Healthy, unhealthy C. Underweight, healthy, overweight D. Thin, healthy, heavy, obese

20. ## Health!

Mean intake of seafood in the United States is approximately 3- 1/2 ounces per week, and increased intake is? A. Not advised B. Believed to cause harm C. Not likely to help or harm D. Recommended

21. ## Health

A person’s daily sodium intake should be reduced to less than ________ milligrams and further reduced to ________ milligrams among persons who are 51 and older and those of any age who are African American or have hypertension, diabetes, or chronic

22. ## MATH

2,100 LOAN AT 13% ADD ON INTEREST FOR 3 YEARS. HOW DO I CALCULATE THE APR?

23. ## Chemistry

Use Ksp to find the concentration of an ion in a saturated solution. Consider a 2.50E-3 M solution of Al2(SO4)3. (a) What [OH^-] is required to initiate precipitation of Al^3+ from the solution? (b) What [OH^-] is required to lower the [Al^3+] to 2.00E-7 M

24. ## Literacy

Search engines are most useful for finding A. scholarly journal articles. B. books in a library. C. course information. D. Web sites.

25. ## Literacy

Which one of the following services is provided through the Ask-a-Librarian feature in the Penn Foster Library? A. An analysis of an issue presented in your course B. A historical date or the source of a quote C. An informed opinion on how to improve your

26. ## Algebra 1

The University of Selectivity had an acceptance rate of 20 percent for the year 2006, with an incoming class of 300 freshmen. Between 2006 and 2007, the number of applications they received increased by 30 percent, but the number of students admitted

27. ## statistics

Surgery vs. placebo for the knee pain: Refer to Example 10. Is Arthroscopic Surgery Better than Placebo? Here we show MINITAB output comparing mean knee pain scores for the placebo (group 1) to debridement arthroscopic surgery (group 2). a) State and

28. ## chemistry

How much ethanol is required to make a 2L of a 70%ww solution?

29. ## maths

the circular pond has radius r. the area of a pond whose radius is 6m more than r is 4 times the area of the the first pond. the radius r of the first pond equals

30. ## SCIENCE

chemical formula for Fe + ZnSO4

31. ## Math

I am wondering how to get the answer 4324 by multiplying 25.11 *3.14 I am constantly getting different answers the answer i am consistently getting is 8284.84 and 7944.54 I really need help!

32. ## science

how make a hybridization of pcl5 with dygram

33. ## statistics

it is stated that the standard deviation sample of the is 7.6 (n = 26). Test the claim to a significance level of 0.10 that the population standard deviation was greater than 7.0. Round all answers to 3 decimal places.

34. ## statistics

5 to the third power (i.e., 5x5x5) would equal

35. ## Elementary Algebra

I need an explanation on how to work out negative exponents. Example: (3a^-2b^3)^-2

36. ## PHI103

: After being told that she is being punished for lying, a child responds by telling her mother that she also lied. this responce may involve which fallacy

37. ## Math/physics

Known factors-weight 105 g---speed at start 60 mph---distance traveled 70 yds. Questions ,what is the rate of decelleration?, At what yard marker does it decellate to 35 mph For each 5 feet higher from start - how much farther does it travel. Thank you for

38. ## Math

I have (3.14) (19.36) (12) and i am trying to find out how to correctly multiply them Also i am trying to find value of cylinders

39. ## the five c's

I have completed the worksheet for the five c's. Some of my answers are the same as on here, however some are not. I would love to have a clear understanding of which answer goes with which question. Mainly, "this makes you a better credit risk to the

40. ## chemistry

The Ksp for calcium fluoride (CaF2) is 3.9 x 10^–11 at 25°C. How many moles of solid NaF must be added to 1.00 L of 0.100 M CaCl2 in order to precipitate CaF2? Please help me set up this ICE table and understand how to solve this!! thank you!!

41. ## chemistry

Glutamate (Glu–) is the conjugate base form of glutamic acid (HGlu). The Ka of glutamic acid is 5.012 x 10^–5. You titrate 50 mL of 0.10 M sodium glutamate solution with 0.05 M HCl solution. Calculate the pH of the solution at the equivalence point.

42. ## mechanics

resolve a force of 120n acting at an angle of 30degree with respect to horrizontal.

43. ## Math

A basket containing 80 eggs weighs 2kg 300g. The same basket containing 60 eggs weighs 1kg 700g. Find the mass of the empty basket.

44. ## billing and coding

help with the ICM-9-CM Book can't find the codes for my assignment. I am trying to understand this book but I am having a hard time can you tell me how to use this book to get my codes?

45. ## Physics

3. A projectile is launched at 10.0 m/s in a direction 45.0 degrees above the horizon. It hits the ground 10.0 m below its initial position. What is its speed just before hitting the ground? Ignore air resistance. The answer is supposed to be 17.2 m/s.

46. ## math

250 is 12% of what amount?

47. ## statistics

it is stated that the standard deviation sample of the is 7.6 (n = 26). Test the claim to a significance level of 0.10 that the population standard deviation was greater than 7.0. Round all answers to 3 decimal places.

48. ## science

A mixture of {\rm NaCl} and {\rm NaBr} has a mass of 2.10{\rm g} and is found to contain 0.71{\rm g} of {\rm Na} What is the mass of {\rm NaBr} in the mixture?

49. ## Math ( i just need these two to finish my workshet

Show the solutions of 1. If a = 4, b = 3, and A = 36o. 2. If a = 3, b = 4, and A = 48.59o Finding a "solution" means solving for all missing sides and angle measures in each triangle.)

50. ## chemistry

An aqueous solution is made using 137g of diluted to a total solution volume of 1.30L .Calculate the molarity.molality and mass percent of solution.*assume a density of 1.08g/ml for the solution..

51. ## Algebra

Solve using set builder notation, show all work. 12x-25 is greater than or = to 3x-5(x+6)

52. ## geometry

Given parallelogram ABCD, find the values of x and y. AX = y + 4 XC = 2y - 8 DX = x + 5 XB = 3x

53. ## science

a canoe displaces 100 L of water weighs 9.8 NL what is the bouyant force on the canoe

54. ## Hea;th

Empty calories are defined as ________. A. Calories from dairy products only B. Calories from low-fat foods and/or fruits and vegetables C. Calories from water and other foods or beverages that have zero calories D. Calories from solid fats and/or added

55. ## HEALTH!

What are the four basic food safety principles that work together to reduce the risk of food borne illnesses? A. Wash, Cook, Eat, Clean B. Clean, Separate, Cook, Chill C. Clean, Cook, Store, Disinfect D. None of the above b?

56. ## health

Not eating breakfast has been associated with _________, especially among children and adolescents. A. Increased energy B. Excess body weight C. Losing weight D. None of the above i think its A

57. ## HEALTH

I HAVE NO CLUE PLEASE HELP!! : Increase the amount and variety of seafood consumed by choosing seafood in place of some meat and poultry. A. Fruits B. Some meat and poultry C. Vegetables D. Breads

58. ## HEALTH

In striving to meet the 2010 Dietary Guidelines for Americans, one should consume more of certain foods and nutrients such as ________. A. Fruits B. Carbohydrates C. Energy drinks D. Breads i think its Fruits :)

59. ## Math

In the list of five measurements shown below, one is blurred. What must this value be, if the mean of the five measurements is 7? 8 5 10 3 #

60. ## MAth!

In the list of five measurements shown below, one is blurred. Supply a fifth value that would make the median 8. 8 5 10 3 #

61. ## PHysics

What is the total energy of a 15-kg mass attached to a spring oscillating horizontally with an amplitude of 20 cm and an angular frequency of 32 rad/s?

62. ## microeconomics

the following information applies to the market for a particular items in the absence of aunit excise tax. ($4,50,200) ($5,75,175) ($6,100,150) ($7,125,125) ($8,150,100) ($9,175,75) a. according to the informaton above, in the absence of a unit excise tax,

63. ## Maths-Trigonometry

a kite is attached to a string that is 15m long. If the string makes an angle of 26 degrees to the horizontal the height of the kite is.

64. ## health

identify two key health care related challenges of the aging population such as increase in health care cost, increase in prescription drug cost or the need for in home medical care

65. ## Pharmacy math

How much dil HCL (10% w/w) HCL specific gravity = 1.045 would be required to prepare 2000ml of a solution containing 0.005 molar HCL? HCL m.w.t = 36.5 Who try to solve for me. Please help The right answer is 34.9ml

66. ## algebra

A total of $6200 is deposited into two simple interest accounts. On one account the annual simple interest rate is 2%, and on the second account the annual simple interest rate is 4%. The amount of interest earned for 1 year was$148. How much was invested

67. ## calculus

So I am suppose to evaulate this problem y=tan^4(2x) and I am confused. my friend did this : 3 tan ^4 (2x) d sec^ 2x (2x)= 6 tan ^4 (2x) d sec^2 (2x) She says it's right but what confuses me is she deriving the 4 and made it a three? I did the problem like

68. ## Math

If the principal P = $900, the interest I =$819, and time t = 7 years, what is the rate?

75. ## English

What is an "inside address" for a letter?

76. ## medical transcription

Could someone review this and make sure it appears to be correct? Had a repeat magnetic resonance imaging (MRI) of the head. She had a lesion seen in the right frontal lobe on previous computed tomography (CT) and MRI scanning. This lesion has not changed

77. ## 11 Maths B

Design a wine glass that uses at least 5 different equations to form the outline of the shape. At least half of your equations must be curves. It is easier if the design is done with the glass on its side, that is, with the axis of the design running along

78. ## Explanation of Maths Question

Can someone please explain what does these questions mean? Design a wine glass that uses at least 5 different equations to form the outline of the shape. At least half of your equations must be curves. It is easier if the design is done with the glass on

79. ## Explanation of Maths B Question

An example of a wine glass design, using three equations, is given below. The base of the wine glass is defined by a quadratic equation, the stem by a linear equation and the body of the glass by a square root function. The difficult part of the

80. ## What does this Maths B question mean?

How do I do thi question? An example of a wine glass design, using three equations, is given below. The base of the wine glass is defined by a quadratic equation, the stem by a linear equation and the body of the glass by a square root function. The

Frank's cell phone package costs $20 per month and an additional$0.05 per text. Josie pays $15 per month and$0.10 per minute. Determine the linear system that could be used to find out when their monthly bills would be the same.