Questions Asked on
March 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

    asked by JuanPro
  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?

    asked by Kam
  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

    asked by Dan
  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).

    asked by Nick
  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

    asked by Roderick
  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

    asked by Anonymous
  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?

    asked by Amy
  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

    asked by Patrick
  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

    asked by luna
  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

    asked by Sandy
  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.

    asked by suri
  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.

    asked by kartik
  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

    asked by Anna
  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

    asked by nisa
  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

    asked by Anonymous
  16. Science

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

    asked by Sally
  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.

    asked by JuanPro
  18. chemistry

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

    asked by ogboyeb
  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

    asked by Jackie
  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?

    asked by Kim
  21. science (check)

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

    asked by luna
  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

    asked by luna
  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.

    asked by jassica
  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.

    asked by Christina
  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

    asked by Sarah
  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

    asked by Rainie
  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?

    asked by Anonymous
  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)

    asked by james
  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

    asked by james
  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 .

    asked by jasmine22
  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

    asked by JuanPro
  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

    asked by JuanPro
  33. chemistry

    278.35g Ba3n2 to mole Ba3N2

    asked by Anonymous
  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 =

    asked by Sandy
  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

    asked by bekah
  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

    asked by Student
  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?

    asked by kjean
  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.

    asked by Tracy
  39. science

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

    asked by Cierra
  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.

    asked by Student
  41. Algebra

    Please help me solve this problem? 3/x + 6/ x+3 = 8/ x+1 Thank you

    asked by Student
  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

    asked by Derrick
  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!

    asked by Student
  44. science

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

    asked by Cierra
  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?

    asked by canadiangoose
  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?

    asked by Jay
  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

    asked by chris
  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?

    asked by sunny
  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.

    asked by kim
  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

    asked by Frannie
  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.

    asked by John
  52. Language arts

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

    asked by ll
  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!

    asked by Andrea
  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.

    asked by amisha
  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!)

    asked by Lauryn
  56. math

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

    asked by sami
  57. 3rd grade math

    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.

    asked by mandie
  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

    asked by Elijah
  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

    asked by james
  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?

    asked by Nisabel
  61. Pre calc

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

    asked by Deena
  62. Math/precalc

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

    asked by Emily
  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

    asked by Sandy
  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

    asked by Shiva
  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

    asked by anonymous
  66. Science (check please)

    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.

    asked by luna
  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?

    asked by james
  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?

    asked by james
  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 –

    asked by MS
  70. Need 8 grade math help quick please!

    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

    asked by Rainshine
  71. atomic physics

    What wavelenght of radiation is necessary to ionize hydrogen.

    asked by Adigun500
  72. atomic physics

    What's the difference between excited and unexcited hydrogen?

    asked by Adigun500
  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)

    asked by h
  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

    asked by nisa
  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!!!

    asked by Anonymous
  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

    asked by EA
  77. ENG 1511

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

    asked by cindoh
  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

    asked by Nica
  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?

    asked by Anonymous
  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.

    asked by Amy
  81. Physics

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

    asked by Sara
  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

    asked by Amy
  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

    asked by matt
  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

    asked by Omar
  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

    asked by Omar
  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

    asked by Amy
  87. science(check answers)

    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

    asked by matt
  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

    asked by CaliGirl
  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

    asked by JuanPro
  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,

    asked by JuanPro
  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

    asked by matt
  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

    asked by JuanPro