Questions Asked on
July 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?

    asked by anonymous
  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

    asked by Vivian
  3. statistics

    The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses more than 350 minutes?

    asked by Anonymous
  4. 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!!

    asked by kellie
  5. 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?

    asked by nana
  6. 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.

    asked by sweatpea
  7. 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

    asked by Tony
  8. 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..

    asked by noor
  9. 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

    asked by Emmett
  10. 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,

    asked by carlos
  11. statistics

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

    asked by carlos
  12. 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 I HAVE NO CLUE PLEASE HELP OR GIVE ME HINTS! :$

    asked by Aya
  13. Literacy

    Scholarly articles generally include which of the following elements? A. A bibliography or a list of works cited. B. A complete biography of the author or authors. C. Detailed diagrams of the concepts presented. D. Criticism by academic peers

    asked by Deandrah
  14. 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

    asked by rifkhan
  15. algebra 2

    1.Simplify the difference. n^2 - lOn+24 9 / n^2 - 13n + 42 — 7 A. n-13/n-7

    asked by Anonymous
  16. 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

    asked by James
  17. statistics

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

    asked by carlos
  18. 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 #

    asked by Jordan
  19. Math-one more

    The average length of time, per week, that students at a certain university spend on homework is normally distributed with a mean of 24.3 hours and a standard deviation of 1.4 hours. Jane tells her parents she spends more time studying than 75% of the

    asked by Jordan
  20. 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,

    asked by joikia
  21. 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

    asked by Jo
  22. 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

    asked by Fai
  23. MATH

    Find the amount of interest and the monthly payment for the loan. Purchase a living room set for $3,800 at 12% add-on interest for 3 years.

    asked by DAVID
  24. 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

    asked by Nina
  25. 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

    asked by dawn
  26. 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

    asked by Aya
  27. 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.

    asked by L
  28. SCIENCE

    chemical formula for Fe + ZnSO4

    asked by ankula
  29. science

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

    asked by patience
  30. 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

    asked by Aya
  31. 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

    asked by Aya
  32. 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

    asked by Nina
  33. 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

    asked by Nina
  34. 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

    asked by david
  35. 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.

    asked by kellie
  36. 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.

    asked by James
  37. 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.

    asked by geety
  38. 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

    asked by Aya
  39. 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?

    asked by Vladimir
  40. English

    Antonyms of: Careful: False: ignorant: A: uneducated B: reckless C: intelligent D: untrue E: Genuine I think careful is B false: E ignorant: A

    asked by Emma
  41. MATH

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

    asked by LaCresha
  42. Maths B question - population

    The population P of a particular city, Metropia, is growing at a rate proportional to the current population. The population at time t years is modelled by the equation P = Aekt where A and k are constants. (a) With the aid of appropriate examples, explain

    asked by Nina
  43. 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

    asked by Deandrah
  44. 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

    asked by Anonymous
  45. 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

    asked by Dan
  46. 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!

    asked by Javohn
  47. Algebra

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

    asked by Ellen
  48. 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 #

    asked by Jordan
  49. 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

    asked by Archie
  50. 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

    asked by Anonymous
  51. does anyone

    known the architect of the Mosque of Ibn Tulun ?

    asked by Anonymous
  52. 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

    asked by marla
  53. 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

    asked by Nina
  54. math

    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.

    asked by David
  55. algebra

    parking in a student lot cost $1 for the first half hour and $1.75 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time that a student can park in this lot for $9 what is the answer

    asked by christina
  56. Literacy

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

    asked by Deandrah
  57. statistics

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

    asked by carlos
  58. mechanics

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

    asked by krunal
  59. 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.

    asked by Marcus
  60. 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?

    asked by nurul
  61. 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

    asked by Aya
  62. 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

    asked by Aya
  63. physics

    A 11.3 kg cart slides down a rough, inclined ramp, angled 24o with respect to the horizontal. At time t = 0 s, the velocity of the cart is 2.75 m/s directed down the ramp. At time t = 0.36 s, the velocity of the cart is 4.16 m/s directed down the ramp.

    asked by Mike
  64. math

    If the principal P = $500, the interest I = $135, and the rate r = 9% what is the time?

    asked by LaCresha
  65. chemistry

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

    asked by Larry
  66. science

    how make a hybridization of pcl5 with dygram

    asked by sanket
  67. 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.

    asked by geety
  68. Elementary Algebra

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

    asked by Wanda
  69. 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

    asked by Anonymous
  70. 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

    asked by Tom
  71. 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

    asked by Javohn
  72. 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

    asked by Anonymous
  73. 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?

    asked by Anonymous
  74. math

    250 is 12% of what amount?

    asked by Anonymous
  75. 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.)

    asked by Tony
  76. geometry

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

    asked by victoria
  77. 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 _______

    asked by Anonymous
  78. 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?

    asked by Aya
  79. 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 :)

    asked by Aya
  80. Math

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

    asked by LaCresha
  81. math

    Interest= $432 r=6% t=8 years How do I calculate the principal and future value?

    asked by LaCresha
  82. English

    What is an "inside address" for a letter?

    asked by Emma