# Questions Asked onMarch 29, 2014

1. ## Math

A physics exam consists of 9 multiple-choice questions and 6 open-ended problems in which all work must be shown. If an examinee must answer 5 of the multiple-choice questions and 2 of the open-ended problems, in how many ways can the questions and

2. ## Trig

What is the total number of solutions for the equation 3 tan^2 A + tan A – 2 = 0 in the interval. 0 ≤ A ≤ π?

3. ## physic angular momentum and torque

Calculate the mass m needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of 15.5kg , and its CG is 35.5cm from the hip joint; the sling is 76.5cm from the hip joint.

4. ## math

Solve this equation for x Log3^2x+5 =1

5. ## Stats

The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio varies according to the Normal distribution with mean 21 and standard deviation 10. The value of P(X < 10) is

6. ## 3 science questions

7. Which of the following is used to make biomass fuel? B. plants and animal waste C. coal

7. ## chemistry

What are strongest intermolecular force in hydrogen iodide ?

8. ## Trig

If the period of a cosine function is 1/3 what is the frequency of the function?

9. ## Trig

In ΔABC, a = 19, c = 10, and m∠A = 111. Which statement can be used to find the value of C?

10. ## Stats

Let the random variable X be a random number with the uniform density curve given below. P(0.6 < X < 0.9) is

11. ## algebra

The height of a ball dropped from a tall building is modeled by the equation d(t) = 16t2 where d equals the distance traveled at time t seconds and t equals the time in seconds. What does the average rate of change of d(t) from t = 2 to t = 5 represent?

1) using kb for NH3 calculate ka for NH4+ ion. Compare this value with that calculated from your measured ph's? 2) how should the pH of a 0.1M solution of NaC2 at H3O2 compare with that of a 0.1 M solution of KC2H3O2? Explain briefly? THANK YOU!

13. ## physics

If the specific gravity of mercury is 13.6 and the atmospheric pressure is 70cm of mercury, what is the total pressure of gas supply in cm of water

14. ## Finance

If \$12,000 is invested in a certain business at the start of the year, the investor will receive \$3,600 at the end of the next four years. What is the present value of this business opportunity if the interest rate is 7% per year?

15. ## Finance

What is the coupon rate of a two-year, \$10,000 bond with semiannual coupons and a price of \$9,543.45, if it has yield to maturity of 6.8%?

16. ## Physic Angular momentum and torque

What is the angular momentum of a 1.0kg uniform cylindrical grinding wheel of radius 19cm when rotating at 1700rpm ?How much torque is required to stop it in 4.6s ?

17. ## Chemistry

In this experiment NaOH is standardized to find out the percent by mass of the acetic acid in a sample of vinegar. A student had not allowed the NaOH pellets to dissolve completely before standardizing it with KHP, but when the student refilled the buret

18. ## survey math 140

a textbook search is considering 19 books for possible adoption. the committee has decided to select 5 of the 19 for furture consideration in how many way can id do so

19. ## Finance

You borrow \$150,000 to purchase a new house. The bank offers you a special 20 year loan with a 7% interest rate and you will make annual payments. How large will each payment be? If you want to sell your house after 7 years, how much will you owe and need

20. ## Finance

Mark has won a contest in which he will receive \$10,000 at the end of each of the next 10 years and then \$20,000 a year for the next 30 years after that. With an 8% discount rate, what is the present value of Mark's prize?

21. ## math

If the consumption function is C = \$200 billion + 0.6Y, (a) How much do consumers spend with incomes of \$8.25 trillion? I got 5.2 trillion for this. (b) How much do they save? ??

22. ## south carolina state history

Which statement explains why public education suffered during reconstruction? A) the state preferred private education to public educatioin. B) teachers were not properly trained to do their jobs effectively.**** THIS ONE? C) the general public cared more

23. ## HIM

Case Discussion Dr. Pearson has recently been hired into the Central City Internal Medicine Group as its fifth physician. He has recently completed his residency and is eager to enter private practice. Dr. Pearson is introduced to Meredith and Dawn, two

24. ## chemistry

if .5 mole of baCl2 is mixed with .2 mole of Na3Po4.Then maximum number of mole of Ba3(PO4)2 is

25. ## algebra

The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May her driving cost was \$310 for 140 mi and in June her cost was \$450 for 700 mi. Assume that there is a linear relationship between the monthly cost C of driving

26. ## physics

The drawing shows three identical springs hanging from the ceiling. Nothing is attached to the first spring, whereas a W = 4.20-N block hangs from the second spring. A block of unknown weight hangs from the third spring. From the drawing, determine the

27. ## Calculus

When dy/dx=(x-6)^½ what does y equal?

28. ## probability

A bag contains 3 red marbles, 3 blue marbles and 3 yellow marbles. Which of the following methods of selecting 2 marbles will have the greater probability of choosing 2 red marbles?

29. ## Social Studies

Identify two problems resulting from urban sprawl in the western region of the United States. If these problems are not solved, what will the outcome likely be? Pls i really need help D:

30. ## To Steve

Sorry here is completed question A bag contains 3 red marbles, 3 blue marbles and 3 yellow marbles. Which of the following methods of selecting 2 marbles will have the greater probability of choosing 2 red marbles? 1- Randomly choose a marble don't replace

31. ## Physics

How much is the acceleration of a baseball thrown by a pitcher in a major league baseball game, if the ball goes from 0 to 90 mph in a one-half-second time period?

32. ## Chemistry

What did you observe after the addition of dilute HCl to the saturated lead chloride solution? Explain observations using relevant chemical reaction. I observed that a white precipitate was formed. Not sure how to explain why it formed

33. ## Chemistry - Solubility Product

What did you observe after the addition of dilute HCl to the saturated lead chloride solution? Explain observations using relevant chemical reaction. I observed that a white precipitate was formed. Not sure how to explain why it formed

34. ## Finance

Jared has decided that he wants to build enough retirement wealth that, if he invests at 8% per year (compounded monthly), will provide him with \$3,500 of monthly income for 30 years. To date, he has saved nothing, but he still has 25 years until he

35. ## math

you have a 2.5 od pipe can you get the same flow from two 1.and a quarter od pipe

36. ## english

Think about the figurative language in this stanza. What is the speaker saying? (1 point) It is hard to find your way at night because it is dark. It is the middle of the night and she is hungry. People find life in being with others. People have to help

37. ## Fiance

What must be the price of a \$10,000 bond with a 6.5% coupon rate, semi-annual coupons, and two years to maturity if it has a yield to maturity of 8% APR?

38. ## Chemistry - Solubility

1.a) What did you observe upon the addition of NH3 (aq) to the magnesium chloride solution? Explain using relevant chemical reactions. I observed a colorless liquid. (Not sure how to explain) b) What happens when NH4Cl was added? Explain observation with

39. ## math

if 1/2 years ago adam was 12, and 1/2x years from now he will be 2x years old, how old will he be 3x years from now

40. ## Chemistry

I am thrown off by this question because they don't give a molecule to work with. Also i don't know how i would work the acid... help! A 195 mL solution of a dilute acid is added to 102 mL of a base solution in a coffee-cup calorimeter. The temperature of

41. ## Health

What causes depression? A. Genetic issues B. Biochemical issues C. There is no known cause D. Environmental issues

42. ## Law

can someone explain to me what the term Libel by Implication means? does it mean like libel my suggestion/ insinuation?

43. ## Chemistry

How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution's concentration? How is the term acid anhydride applied here? I know you had answered this already, but what if KHP is used to titrate the NaOH. In this

44. ## health

Below are descriptions about the programs that are designed to help prevent suicide. Which statement is true? A. CBT because it teaches the skills needed to deal better with upsetting situations. B. DBT, sometimes called collaborative care management, uses

45. ## helth

Which symptoms are more common in depressed children and adolescents than in adults with depression? A. Fears of separation B. Reluctance to meet people C. General aches and pains D. All of the above b?

46. ## research help/ law

How is Japan's libel law different from the U.S. Can anyone provide me with some helpful Websites, it can't be wikipedia or the encyclopedia. I'm having difficulty finding useful sites.

47. ## chemistry

how many mL of 1M HCL is used to make: 100mL of 0.1M hcl 250Ml OF 0.5M hcl 10Ml OF 0.01m hcl

48. ## Physics

The ship in the figure below travels along a straight line parallel to the shore and a distance d = 580 m from it. The ship's radio receives simultaneous signals of the same frequency from antennas A and B, separated by a distance L = 700 m apart. The

49. ## Physics

In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example, the note at 110 Hz has two strings at this frequency. If one string slips from its normal tension of 610 N to 542.00 N, what beat

What is the greatest source of error for the hydrolysis of salts and pH of buffer solutions lab?How would you minimize this source of error?

51. ## math

If true, prove. If false, provide just a counterexample: a. For every function f from nonnegative integers into nonnegative reals, o( f ) = O( f ) −Θ( f ) . (Here, “-“ denotes the set difference: A – B consists of elements in A that are not in

52. ## algebra 1

A company manfactures an alarm clock. Three weeks ago the company had 250 on hand. Two weeks from now it will have 500. Assume the company will continue to make the clocks at the same rate.

53. ## math

1. For n repeated independent trials, with constant probability of success p for all trials, find the probability of exactly x successes in the following exercises.Round your final answers to three decimal places. a.n = 7, p = ¼ , x = 4

54. ## Chemistry

A 1533 kg car is traveling down the road at 90.6 km/h. While traveling at this rate of speed, what is the kinetic energy of this vehicle in kilojoules?

55. ## math

Suppose you borrow \$1,000 of principal that must be repaid at the end of two years, along with interest of 5 percent a year. If the annual inflation rate turns out to be 10 percent, (a) What is the real rate of interest on the loan? For this I got -5%. (b)

56. ## maths natural log

In the beginning, only some white aigrettes live in a swamp. On a certain day, a group of black aigrettes migrate to the swamp. The population of the white aigrettes (W) and the black aigrettes (b)after t months are given by W= 1100e^(-0.08t) and b= 800-

57. ## Stats

Assume that event A occurs with probability 0.4 and event B occurs with probability 0.5. Assume that A and B are disjoint events. The probability that either event occurs (A or B) is A. 0.0 B. 0.7 C. 0.9 D. 1.0.

58. ## Help!! Physics

What capacitance in needed in series with an 785 µH inductor to form a circuit that radiates a wavelength of 199 m?

59. ## Physic Moment of inertia

Determine the moment of inertia of a 11.1kg sphere of radius 0.794m when the axis of rotation is through its center.

60. ## physic angular momentum and torque

What is the angular momentum of a figure skater spinning at 2.7rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.6m , a radius of 14cm , and a mass of 50kg How much torque is required to slow her to a stop in

61. ## algebra

Jeremy had 36 community concert tickets to sell. He sold 2 and 3 and a third of the tickets did jeremy sell

62. ## Physic

Calculate the mass m needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of 15.5kg , and its CG is 35.5cm from the hip joint; the sling is 76.5cm from the hip joint.

63. ## Statistics

Which of these statements is always true for a researcher who is using standard statistical methods in a test of significance? A. A researcher who rejects a true null hypothesis has committed a Type II error. B. A researcher who rejects the null hypothesis

64. ## Chemistry

In this experiment NaOH is standardized to titrate it with vinegar so thtat the percent by mass of the acetic acid can be determined. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution's concentration? How

65. ## physic

A 69-cm-diameter wheel accelerates uniformly about its center from 150rpm to 320rpm in 4.4s . Determine angular acceleration?

66. ## Statistics

Sorry to ask another question but I keep struggling with this class. If all else remains the same, which of these will make a confidence interval for a proportion narrower? I. Increase the confidence level. II. Increase the sample size. III. Increase the

67. ## Statistics

. A 2003 Harris Poll of 993 randomly selected American adults found that 69% believed in capital punishment (death penalty). A sample size of 1010 American adults in 2000 found that 64% believed in capital punishment. Write the hypotheses for a

68. ## us history

Explain how wwII promoted an awareness of the links between racism in the US and coloniasm around the world. (in a long essay please)

69. ## teaching

How would you incorporate logic and experimentation into your curriculum and still emphasize Native American thinking into your curriculum? For example a science teacher could have students monitor and document the phases of the moon by dates and write

70. ## chemistry

what is the lewis structure for N-bromosuccinimide?

71. ## algebra

Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x-4)(x+2)/(x-3)(x+5) ¡Ü 0

72. ## chemistry

what is the hybridization of each atom for hydrocyanic acid?