# Questions Asked onMarch 28, 2014

1. ## probability

Let X and Y be independent random variables, each uniformly distributed on the interval [0,1]. Let Z=max{X,Y}. Find the PDF of Z. Express your answer in terms of z using standard notation. For 0

2. ## physics

Two masses are hung are connected by a light cord and hung from a frictionless pulley of negligible mad are shown. Mass m1=3.00kg and mass m2=2.00kg. When the two masses are released from rest, the resulting acceleration of the two masses?

3. ## Physics

A snowmobile, with a mass of 530 kg, applied a force of 410 N backwards on the snow. a) What force is responsible for the snowmobile’s resulting forward motion? (Hint: Think action–reaction force pairs.) b) If the force of friction on the snowmobile is

4. ## Another Physics

At some point in the combustion cycle of an engine, the temperature of a combusted air-fuel mixture is 582 degrees Celsius. Given that the pressure in the mixture is 6.2 bar, determine the density of the mixture (in kilogram per cubic metre).

5. ## Algebra

Keiko is a software saleswoman. Let y represent her total pay (in dollars). Let x represent the number of copies of History is Fun she sells. Suppose that x and y are related by the equation 2200+90x=y . Answer the questions below. Note that a change can

6. ## math

A boat needs to travel south at a speed of 20 km/h. However a constant current of 6 km/h is flowing from the south-east. Use vectors to find: a.the equivalent speed in still water for the boat to achieve the actual speed of 20 km/h. b the direction in

7. ## Criminal law

1. Which of the following involves rationalizing misconduct by perceiving informal norms – such as secrecy or loyalty to fellow officers – to be more important than societal laws, norms, or the formal norms of the organization by which one is employed?

8. ## Physics

The seesaw in the figure below is 4.5 m long. Its mass of 20 kg is uniformly distributed. The child on the left end has a mass of 14 kg and is a distance of 1.4 m from the pivot point while a second child of mass 39 kg stands a distance L from the pivot

9. ## science (check please (:)

8.Which of the following would help decrease the human ecological footprint? . . . . . . . . . . . . . . . My answer: using public transportation instead of riding in a car? (I have doubts on my choice) but my other choice is using bottled water instead of

10. ## CHEMISTRY

The mass of an erlenmeyer flask is 78.639g and the mass of the flask and water is 327.039. If the density of water is 1 g/ml then what is the true volume of the flask? so i had subtracted the mass of just the flask from the mass of the flask and the water

11. ## math

Enrique charges \$5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour.

12. ## math help

Enrique charges \$5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour.

13. ## Spanish

Am I correct? I. Conteste las preguntas utilizando mandatos formales. Trate de usar pronombres cuando posible. 1. ¿Es necesario apuntar la dirección? No, lo me no apunte la dirección. 2. ¿Debo sacar el plano de la ciudad? Saquelo. 3. ¿Es mejor venir

14. ## math

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = -0.06x^2 + 9.6x + 5.4 where x is the horizontal distance, in meters from the starting point on the roof and y is the height in meters of

15. ## ALGEBRA

EVA IS JUMPING ON A TRAMPOLINE .HER HEIGHT H AT TIME T CAN BE MODELED BY THE EQUATION H=-16T^2+20T+6.WOULD EVA REACH A HEIGHT OF 14 FEET

16. ## Science

Describe how the structure of DNA is correlated with its role as the molecular basis of inheritance in Biology.

17. ## probability

Consider n independent rolls of a k-sided fair die with k≥2: the sides of the die are labelled 1,2,…,k and each side has probability 1/k of facing up after a roll. Let the random variable Xi denote the number of rolls that result in side i facing up.

18. ## chemistry

Pleas does any one know how to calculate the number of isomers of an organic compound. Any formula pls

19. ## Geometry

A lighthouse keeper in his observation tower 120 feet above the water sees a pontoon airplane and a small fishing boat. If the plane is directly above the boat, how far above sea level is the plane flying, rounded to the nearest foot? Be sure to show your

20. ## Math for grade 6 peace

The computer club is having a fundraiser to help pay for a trip to the science museum. So far they have raised \$96, which is only 48% of their goal. How much money are they trying to raise?

21. ## science (check)

carrying capacity is the maximum number of _____ that an ecosystem can support. . . . My Answer: Individuals in a population (Is it right?)

22. ## science (check)

5.Which of the following could help reduce loss of biodiversity ? A. increasing construction of tall buildings B. increasing farming operations C. increasing conservation measures***** D. Increasing the human ecological footprint

23. ## math

an real raw egg was dropped from a 20 story height , however it didn't break . How is that possible ? IT LANDED on concreate solid.

24. ## Physics

Suppose we take a 1 m long uniform bar and support it at the 27 cm mark. Hanging a 0.31 kg mass on the short end of the beam results in the system being in balance. Find the mass of the beam.

25. ## Biology (fetal pig)

What substance passes through the glottis? [Is it Air??] What substances passes through the esophagus? [I don't know if this is food] please help. thanks

26. ## Chemistry

I would really like to understand how to do these problems, because my exam is coming up in a few weeks. I still cannot comprehend how you can tell if a system is is positive or negative according to reaction. For #1, I presume it is E if it is spontaneous

27. ## Chemistry

excess magnesium is reacted with 45 grams of sulfuric acid. 9.5 liters of hydrogen gas are collected understand conditions of temperature and pressure. what is the percentage of hydrogen sulfate and of water in the acod solution?

28. ## algebra

write a fourth degree polynomial function with real coefficients that has -3,1/5, and 4+i as zeros and the y intercept of (0,5)

29. ## 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) ¡Ü0

30. ## calcules

we want to construct a box with a square base and no top. the volume of the box will be 8 cm^3 what are the dimension of the minimize the surface area .

31. ## probability

A fair coin is flipped independently until the first Heads is observed. Let K be the number of Tails observed before the first Heads (note that K is a random variable). For k=0,1,2,…,K, let Xk be a continuous random variable that is uniform over the

32. ## logic and math

Calculate the truth value (f or V) a. Is it true that if (the Papaya is a fruit from the Caricaseas or the Pitahaya is the fruit of a plat from the Cactaseas) then (el Cohombro is a fruit of a plant from the family of the Cucurbitaceas or the Nisper is a

33. ## chemistry

278.35g Ba3n2 to mole Ba3N2

34. ## Chemistry

I got think I got the following questions almost figured, but I just want someone to make sure that I am correct. 1) The whole experiment involves using the ideal gas law to predict the molar mass of an unknown liquid. The formula is molar mass of liquid =

35. ## chemistry

Select only the True statements about buffer systems. Select all that are True. 1. Starting with NH3(aq) and adding a small amount of HCl(aq) will make a buffered solution. 2. The blood buffer, among other things, is supported by carbonic acid and its

36. ## Algebra

Can you please help me with these Algebra word problems? Complete the following word problems. 1. Tell whether the table represents inverse variation. If so, write the inverse variation equation and solve for y when x = 4. Show work that supports your

37. ## Physics

A wheel of moment of inertia 0.136 kg · m2 is spinning with an angular speed of 5000 rad/s. A torque is applied about an axis perpendicular to the spin axis. If the applied torque has a magnitude of 67.8 N · m, the angular velocity of precession will be?

38. ## Statistics

Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ score separating the top 37% from the others. Answer in one decimal place.

39. ## science

can any of you tell me some good information about solar energy

40. ## Algebra

Can you help me work this out with long division? r^2 - 7r + 12/ r+4 divided by r^2 - 7r +12/ r^2 + 6r +8 Thanks.

42. ## Physics

How much work is done in lifting a 6kg object from the ground to a height of 4m? A 12n object is lifted 5m how much work is done How much work is done if a 5n object is lifted from the ground to a height of 8m? How much gravitational potential energy does

43. ## Algebra

Please help me simplify the expressions and solve the equations? 1. v^2 + v - 12/ v^2 + 6v + 8 divided by 2v - 6/ v +2 2. 2/ b-2 = b/ b^2 - 3b +2 + b/ 2b - 2 3. 1/ x-2 + 2x/ (x-2)(x-8) = x/ 2(x-8) 4. (m^2 + 2m + 1/ m^3 + 3m^2 + 3m +1 (m^2/m - 3m/3) Thanks!

44. ## science

can any of you tell me some good information about wind energy

45. ## Math 20-3

A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?

46. ## Math

A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?

47. ## language arts

6.Which of the following places events in chronological order? A.formation of Negro Leagues, invention of baseball, Civil War B.invention of baseball, Civil War, formation of Negro Leagues C.invention of baseball, formation of Negro Leagues, Civil War

48. ## math help

factor: 1) (x+y)^2 - (a+b)^2 = [(x+y) - (a+b)] [(x+y) + (a+b)] = [x+y-a-b] [x+y+a+b] 2) 6x^4 - 6 = 6(x^4 - 1) = 6(x^2-1)(x^2+1) Is this right?

49. ## math

Kara eats 4/5 of the food that Jillian does. If kara needs to bring 14lbs of food for the week, how much does Jillian need to bring.

50. ## Medical coding

Please indicate all ICD-9 diagnosis and procedure codes for the coding scenarios. In addition, assign the POA indicator for each diagnosis code. 1). A patient is admitted with IDDM, out of control. The patient is administered insulin in an attempt to

51. ## math

Enrique charges \$5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour.

52. ## Language arts

In "Aunt Millicent,"how does Jamie make the settings of aunt Millicent travels appear realistic?

53. ## Calculus

At what interval is e^(-5x^2) concave up? I know the second derivative is 100x^2*e^-5x^2-10*e^-5x^2 but I just can not figure this one out. Thank you for your help!

54. ## math

A wood burner burns 180 pounds of wood in 5/2 days . How many pounds of wood is needed for the burner in 1 month.

55. ## Math

The cafeteria has 4 cases of tuna and 9 single cans of tuna. In all,there are 65 can of tuna. How many cans of tuna are in a case? (P.S.-PLEASE SHOW WORK...I NEED HELP!Thank You!)

56. ## math

samantha has 28 and she gets 28 more how many would she have in all.

suppose there are 2 pieces of the cake left over but you don't know how many pieces there were in the whole cake. explain how you could find the number of pieces in the whole cake if taylor told you that 1/5 of the cake was left.

58. ## Math

Chads buys peanuts in 2 pound bags. How many 2 pound bags of peanut should chad buy so that he can fill the 5/6 pound bags without having any peanuts left over

59. ## georgia history

hich of the following was a cause of the Great Depression? (Choose all that apply.) (3 points) the Stock Market Crash of 1929 Prohibition Failed crops and drought A lack of demand for goods

60. ## math

A ball is thrown into the air with an upward velocity of 20 ft/s. Its height (h) in feet after t seconds is given by the function h(t) = –16t^2 + 20t + 2. How long does it take the ball to reach its maximum height? What is the ball’s maximum height?

61. ## Pre calc

y=5tan1/2(x+pi/4) What is the period?

62. ## Math/precalc

What is the period and amplitude of y=3tan(2/3x-pi/6)? Thanks!

63. ## Chemistry

Titration was used to determine the molarity of acetic acid in vinegar. A primary standard solution of KHP was used to standardize the NaOH. 1. When performing this experiment, impure KHP was used to standardize the NaOH solution. If the impurity is

64. ## Finance

9. H Corporation is considering a training program that cost \$600,000. Anticipated benefits are \$60,000 in the first year, \$75,000 in the second year, \$85,000 in the third year, and \$95,000 in the fourth year. Benefits will decline 8 percent a year after

65. ## Finance

10. A new factory at Arcata requires an initial outlay of \$3.5 million to be paid immediately. The factory will last for eight additional years, after which it can be sold for a salvage value of \$2,000,000. Sales will be \$800,000 during the first year of

3. Which of the following pairs of terms could be used to describe a bullfrog that is active at night and enters a state of complete inactivity during colds months? . . . My answer: Circadian rhythm and hibernation.

67. ## math

J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^2-1.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?

68. ## Algebra word problem

J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^2-1.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?

69. ## Calculus

Find the area cut off by x=4 from the hyperbola x^2/9-y^2/4=1. Answer is 4.982 in the book. I have proceeded as under: Y=2/3*sqrt(x^2-9) and rhe reqd. area is double of integral 2/3*sqrt(x^2-9) from 3 to 4. Int= 2/3*[xsqrt(x^2-9)/2 –

I don't understand this. I don't get exactly what I'm supposed to do with the P(parenthes) thingy or how each question differs from the next. Theoretical and Experimental Probability: A number cube with the numbers 1 through 6 is rolled. Find the given

71. ## atomic physics

What wavelenght of radiation is necessary to ionize hydrogen.

72. ## atomic physics

What's the difference between excited and unexcited hydrogen?

73. ## chemistry

The density of 19.0% by mass of nitric acid, HNO3 is 1.11 g cm-3. Calculate the volume (dm3) of acid needed to prepare 2.00 dm3 of 3.00 mol dm-3 HNO3 solution. (FW HNO3 = 63 g/mol)

74. ## math

how many real number solutions does the equation have y = -4x^2 + 7x - 8 no solutions (is it this one) one solution two solutions infinitely many solutions

75. ## Maths

What is a shape that has a 24cm2 area and a 26cm perimeter. The sides have to be 5,4 and 3cm long!!!

76. ## Calculus

Jesse has constructed a huge cylindrical can with a diameter of 60 ft. The can is being filled with water at a rate of 450 ft3/min. How fast is the depth of the water increasing? (Hint: The volume of water in the cylinder is determined by πr2h where r is

77. ## ENG 1511

SOCIAL MEDIA HAVE MADE OUR LIVES EASIER. WRITE AN ESSAY IN WHICH YOU AGREE OR DISAGREE

78. ## Computer Science

Computers are used worldwide, but most of the major operating systems originated in English-speaking countries. Take a look at the operating system that you use in the context of global users who might not speak English and who might not have grown up with

79. ## Geometry

concrete costs 105 per cubic yard. plato is making a rectangular concrete garage floor measuring 33 feet wide by 6 inches thick. how much will the concrete cost?

80. ## Criminal law

1. An investigator conducting a crime scene search at the scene of a violent crime has certain responsibilities and procedures to follow related to evidence collection. Of the following steps, which one is not required of the on-scene investigator? A.

81. ## Physics

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

82. ## Criminal law

1. The primary purpose of psychological profiling is to provide: A.the identity of an offender involved in a violent crime such as murder or sex crime. B. absolute information about an offender’s emotional and personality character traits and to

83. ## Language Art (Please Check)

1.C 2.A 3.C 4.C 5.D 6.D 7.B 1.She was rivaling the mayor by A.sending money to him. B.voting for him. C.running against him. 2.In which of the following situations would you be most likely to be caught up in a commotion? A.a riot B.a math exam C.a school

84. ## Algebra 2

Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn!@!@!. 49X^6+7X^7/28X^8

85. ## Algebra 2

Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn! h(x)=x^2-9/x^2-4x+3

86. ## Criminal law

1. _________ refer to the notion that basic guarantees exist and that all people possess them simply by virtue of being human. Natural rights Hypothetical imperatives Moral duties is it A 2. Much of the reasoning in the social sciences is __________, which

5.A 6.A 5.The origin of the words shut and out is Old English. During the 1800s, the two words were combined to take on the baseball meaning, a game in which one side does not score. What is the most likely meaning of the word shutout in the story The

88. ## Math

1. P(Number3) A.4/6 B.1/6 C.2/6 D.5/ 3. P(Complement of 4) A.1/6 B.5/6 C.2/6 D.4/6 4. A multiple choice question has 5 possible answers. What are the odds in favor of guessing the right answer? A.1:5 B.2:2 C.3:1 D.1:3

89. ## probability

t the discrete random variable X be uniform on {0,1,2} and let the discrete random variable Y be uniform on {3,4}. Assume that X and Y are independent. Find the PMF of X+Y using convolution. Determine the values of the constants a, b, c, and d that appear

90. ## probability

Consider the random variables X, Y and Z, which are given to be pairwise uncorrelated (i.e., X and Y are uncorrelated, X and Z are uncorrelated, and Y and Z are uncorrelated). Suppose that E[X]=E[Y]=E[Z]=0, E[X2]=E[Y2]=E[Z2]=1, E[X3]=E[Y3]=E[Z3]=0,

91. ## Language Art (Please Check)

5.C 6.B 5.The origin of the words shut and out is Old English. During the 1800s, the two words were combined to take on the baseball meaning, a game in which one side does not score. What is the most likely meaning of the word shutout in the story The

92. ## logic and math

Write the reciprocal and the anti-reciprocal of: That a quadrilateral has 4 equal sides, is a necessary condition for that it is a square. That a triangle has 2 equal sides, is a necessary condition for that it is isosceles. Only if f is integrable in an I