Questions Asked on
July 12, 2013

  1. Maths

    Prove that max & min values of asinx+bcosx are =/- (a^2+b^2)^1/2

    asked by Alok
  2. College Chemistry

    Based on a Kc value of 0.140 and the data table given, what are the equilibrium concentrations of XY, X, and Y, respectively?

    asked by Anonymous
  3. Calculus

    Skeletal remains had lost 81% of the C-14 they originally contained. Determine the approximate age of the bones. (Assume the half life of carbon-14 is 5730 years. Round your answer to the nearest whole number.) yr

    asked by Anonymous
  4. physics

    an object weighs 10N on earth .what is the objects weight on a planet one tenth the earths mass and one half its radius?

    asked by Kat
  5. maths

    Prove that max & min values of asinx+bcosx are = +/- (a^2+b^2)^1/2

    asked by mahesh
  6. Physics

    Which of the following is correct for the reflected ray if a light ray strikes a plane mirror at an angle of 50° from the normal? a. 40° from the surface of the mirror b. 40° from the normal c. 50° from the surface of the mirror d. 90° from the normal

    asked by Jordan
  7. Calculus

    Find the absolute extrema of the function on the interval [2, 9]. (Round your answers to the nearest hundredth.) g(x)=x/(ln(x)) Absolute minimum: at x = Absolute maximum: at x =

    asked by Anonymous
  8. Chemistry

    Consider the decomposition of a metal oxide to its elements where m represents a generic metal. M2O(s)2M(s)+1/2O2(g) the delta G is 10.30 I need to find K and PressureO2 at 298K I know the equations but i keep getting the answer wrong could you please help

    asked by Catherine
  9. physics

    What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? Note: The electron mass is 9.11 × 10–31kg; and the neutron mass is 1.67 ×

    asked by Lacey
  10. General Chemistry

    A 0.484 g sample of impure NH4Br is treated with 25.00 mL of 0.2050 M NaOH & heated to drive off the NH3. The unreacted NaOH in the reaction mixture after heating required 9.95 mL of 0.0525 M H2C2O4 to neutralize. How many grams of NH4Br were in the

    asked by <3
  11. Calculus

    Four hundred students attended the dedication ceremony of a new building on a college campus. The president of the traditionally female college announced a new expansion program which included plans to make the college coeducational. The number of students

    asked by Anonymous
  12. com

    A word's denotation is its ________

    asked by kayla
  13. College stats

    Please help, I would appreciate an explanation on how you got the answer so I can understand it, being that I am so confused. The Denver Post stated that 80% of all new products introduced in grocery stores fail (are taken off the market) within 2 years. A

    asked by penelope
  14. Calculus

    Find the absolute extrema of the function. (Round your answer to three decimal places.) f(x) = xe-x2 on [0,2] Absolute maximum value: at x = Absolute minimum value: at x =

    asked by Shan
  15. vocab

    ______ definitions are made up of the set of associations implied by a word in addition to its literal meaning a connotative b direct c denotative d none of the above i think its A

    asked by tammie
  16. Calculus

    The growth rate of Escherichia coli, a common bacterium found in the human intestine, is proportional to its size. Under ideal laboratory conditions, when this bacterium is grown in a nutrient broth medium, the number of cells in a culture doubles

    asked by Anonymous
  17. chem ll

    Calculate the pH of a buffer that is 0.250M in NaHCO3 and 0.300M in Na2CO3

    asked by Anonymous
  18. Calculus

    Find the absolute extrema of the function. (Round your answer to three decimal places.) f(x) = xe^-x2 on [0,2] Absolute maximum value: at x = Absolute minimum value: at x =

    asked by Anonymous
  19. Chemistry

    Calculate the work done (in joules) by a chemical reaction if the volume increases from 3.3L to 3.5L against a constant external pressure of 3.7atm .

    asked by Karina
  20. physic

    A Ferris wheel 26.0m in diameter rotates once every 15.0s What is the ratio of a person's apparent weight to her real weight at the top?

    asked by cuzer
  21. science

    Which one of the following gases occupies the smallest volume at STP? A.4g helium B.14g nitrogen C.34g ammonia D.32g oxygen

    asked by Nhlalo
  22. Linear Equation

    A gas station sells regular gas for $2.20 per gallon and premium gas for $2.70 a gallon. At the end of a business day 220 gallons of gas were sold and receipts totaled $519. How many gallons of each type of gas were sold? I know its a linear equation. just

    asked by Sara
  23. Physics

    A 170 kg astronaut (including space suit) acquires a speed of 2.75 m/s by pushing off with his legs from a 2400 kg space capsule. What is the average change in speed in meters/second of the space capsule?

    asked by Ryan
  24. college stats

    I am having a lot of trouble with these questions can anyone help me please. 2. On September 2, 2004, a Dan Jones poll based on a random sample of 408 Salt Lake County residents reported that 26% of the respondents thought that Mayor Nancy Workman should

    asked by penelope
  25. Physics

    A tennis ball may leave the racket on a serve by a top player with a speed of 45.0 m/s. If the ball's mass is 0.063 kg, and it is in contact with the racket for 0.030 s, what is the average force (in newtons) on the ball?

    asked by Zach
  26. Biology

    Will you please check my answers? 1. Single-celled organisms that do not have a membrane-bound nucleus are called A. organelles. B. prokaryotes. C. Golgi bodies. D. eukaryotes. 2. In cells, a form of active transport is A. a sodium-potassium pump. B.

    asked by Macy
  27. physic PLEASE I REALLY NEED HELP WITH THIS PROBLEM

    The formula y=square root 64h can be used to find the velocity v in feet per second of an object that has fallen h feet. Find the velocity of an object that has fallen 25 feet. Round your answer to the nearest tenth.

    asked by lisa
  28. physic

    Planet A and planet B are in circular orbits around a distant star. Planet A is 4.5 times farther from the star than is planet B. What is the ratio of their speeds vA/vB?

    asked by cuzer
  29. Public policy

    Evaluate how public policy decisions affect the receipt of revenues

    asked by Asha
  30. algebra1 HELP PLEASE Thanks you!!

    The formula y=square root 64h can be used to find the velocity v in feet per second of an object that has fallen h feet. Find the velocity of an object that has fallen 25 feet. Round your answer to the nearest tenth.

    asked by lisa
  31. Stats ()

    Coal is carried from a mine in West Virginia to a power plant in Pittsburgh in hopper cars on a long train. The automatic hopper car loader is set to put 75 tons of coal into each car. The actual weights of coal loaded into each car are normally

    asked by penelope
  32. statistics

    MBA604 Statistics Assignment 1 Part 1 1) (5 pts) An electronics company is about to launch a new product. If the serial number for each piece produced has the following format: LLNNN where L stands for any letter in the English alphabet and N is a number

    asked by austin
  33. Vocabulary

    determine whether the definition below is denotative or connotative _____ definitions are subject to indivual interpretation A.denotative b. connotative i think its A

    asked by LadyT
  34. algebra1 HELP PLEASE Thanks you!!

    The function gives the speed in feet per second (ft/s) of a free-falling object after it has fallen x feet (ignoring air resistance). FInd the speed of the object after it has fallen 25 feet. If necessary, round your answer to the nearest tenth.

    asked by lisa
  35. Computers C++ (2)

    1.) Assume c is a char variable. What value does c hold after the following statement executes? (Type the answer without quotes.) c = toupper('a');___________ 2.) Assume c is a char variable. What value does c hold after the following statement executes?

    asked by Thomas
  36. Vocabulary

    Determine whether the definition below is denotative or connotative Gray: A cold, glommy day. A. connotative B. Denotative

    asked by LadyT
  37. college stats

    Sorry for all the questions, I really need help and an explanation so I can fully understand. I really appreciate everything. Thank you. In a random sample of 519 judges, it was found that 285 had an introvert personality type. Construct a 95% confidence

    asked by penelope
  38. physics

    Three forces act on a moving object. One force has a magnitude of 83.4 N and is directed due north. Another has a magnitude of 47.2 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object

    asked by howard
  39. chemistry

    calculate the volume of concetrated nitric acid (68%) that is neede to prepare stock solution 0.25M in 1000mL volumetric flask.(dnitric acid=1.513g/cm3)

    asked by farah
  40. Fundamentals of Management

    1 2 3 4 5 6 7 8 9 10 A major contribution that Taylor made to the study of management was to

    asked by Rhonda
  41. life orientation

    provide 5(or more) ways in which you critically discuss how cancer impact on the teenagers

    asked by nkosikhona
  42. physic

    A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N What would be the magnitude of the gravitational force exerted on the

    asked by cuzer
  43. physics

    A 9.90-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.372. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

    asked by gina
  44. Calculus

    Find the derivative of the function. g(x) = ln(3x + 5)

    asked by Anonymous
  45. college stats

    help please!!! 1. The average number of bumped passengers per day on FliRite Airlines is 2.47 with a standard deviation of 1.75. For a random sample of 40 days, what is the chance the average number of bumped passengers in the sample is between 2 and 2.75?

    asked by penelope
  46. Geometry

    ABCD is a square. If one side of the square measures 2x – 5 inches and the other side measures x + 8 inches, find x.

    asked by Anonymous
  47. Calculus

    Find the derivative of the function. g(t) = t2 ln(e2t + 9)

    asked by Anonymous
  48. Chem

    I was asked to list materials with different structures and exhibit different properties. I thought of water and salt, muriatic acid and laughing gas. Am I correct? I need two more. Please help.

    asked by Kim
  49. calculus

    two forces f1 and f2 acting on an object at a 90 degree angle will pull the object with a reluctant force, R, at an angle between f1 and f2. R= ã f1^2+f2^2 R=15 and f1=9 find f2

    asked by monica
  50. algebra1 HELP PLEASE Thanks you!!

    The function f(x)=5 square root of x gives the speed in feet per second (ft/s) of a free-falling object after it has fallen x feet (ignoring air resistance). FInd the speed of the object after it has fallen 25 feet. If necessary, round your answer to the

    asked by lisa
  51. AP Calc.

    Simplify: [(x^-3)-x]/[(x^-2)-1]

    asked by Anon
  52. PHYSICS

    An arrangement of 3 blocks A ,B,C such that block A of mass 5 kg is over block B of 6 kg, with a friction between them of 0.8. both the blocks are connected to the 3rd block C of mass m by a string and frictionless pulley. Now to find at what value of m

    asked by SURAJ
  53. Math

    Determine the simple interest P=2500 R=3 7/8 T=9 months

    asked by Carie
  54. Math

    Determine the missing value by using simple interest P= R= 2% T=90days i=$12.50

    asked by Carie
  55. Physics(Thermodynamics)

    1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and

    asked by Danny
  56. Math

    Show work to determine if the relation is even, odd, or neither. f(|x|) = |x|- x^2 + 1 I thought it was even because the absolute value and squared will cancel the negatives, but I don't know how to show this through math..

    asked by Anonymous
  57. Algebra

    Determine whether the equation defines y as a function of x. y= -16

    asked by tony
  58. Elementary mechanics

    (Q1) 2 forces act on a point object as follows: 100 at 170 and 100 at 50.Find the resultant force (a)110N at 50 (b)110N at 100 (c)100N at 110 (d) 100N at 50 (Q2) given 3 vectors a=-i-4j+2k,b=3i+2j-2k,c=2i-3j+k,Calculate a-(b-c) (a)-6(b)6(d)9(d)-9 (Q3)The

    asked by david
  59. stats college

    Which of the following confidence intervals will be the widest? a. 90 percent b. 95 percent c. 80 percent d. 98 percent

    asked by penelope
  60. Computers C++

    I really need help with this one... 1.) Look at the following declaration. enum Person { BILL, JOHN, CLAIRE, BOB }; Person p; Indicate which of the following statements or expressions is valid. A.) p = BOB; B.) p++; C.) BILL > BOB D.) p = 0; E.) int x =

    asked by Thomas
  61. Math

    I am more than 300, but less than 400 . My digits add up to 12 . What number am I?

    asked by Ritchell
  62. college algebra

    if the altitude and the base of a triangle are each increased by 4 inches the area of the triangle will be increased by 42 square inches. if the altitude is increased by 3 inches and the base is decreased by 2 inches the area will be increased by 5 square

    asked by quintana
  63. maths

    The maximum temperature on Thursday was 18 degree celsius.On Friday it increased by 0.5 degree celsius. It further increased by 2.5 degree celsius on Saturday. What was the minimum temperature on Saturday ?.

    asked by kaksha
  64. maths

    The maximum temperature on Thursday was 18 degree celsius.On Friday it increased by 0.5 degree celsius. It further increased by 2.5 degree celsius on Saturday. What was the minimum temperature on Saturday ?.

    asked by kaksha
  65. statistics

    MBA604 Statistics Assignment 1 Part 1 1) (5 pts) An electronics company is about to launch a new product. If the serial number for each piece produced has the following format: LLNNN where L stands for any letter in the English alphabet and N is a number

    asked by austin
  66. AP Calculus

    [(3/x)-(4/y)]/[(4/x)-(3/y)]

    asked by Anon
  67. AP Calculus

    Show work to determine if the relation is even, odd, or neither. 1. 3x=|y| (|y|=abs. value of y) Simplify the following complex fractions. 2. [(3/x)-(4/y)]/[(4/x)-(3/y)] PLEASE HELP!

    asked by Anon
  68. AP Calc

    Solve the following absolute value inequalities: |x+1|

    asked by Anon
  69. Math

    Simplify the complex fraction: [(4/(x-5))+(2/(x+2))]/ [((2x)/(x^2-3x-10))+3]

    asked by Sarah
  70. Math

    Solve for x. x/(x-2) + (2x)/[4-(x^2)] = 5/(x+2) Please show work!

    asked by April
  71. science

    A detailed description on the environment the eagle live in:this should include the temperature,vegetation,source of water and climate changes in the habitat.

    asked by kina
  72. Calculus

    Find the derivative of the function. f(x) = ex8 - 6

    asked by Shan
  73. Math

    Find the domain of the following functions. 1. y= radical(x-3) - radical(x+3) 2. y= [radical(2x-9)] / 2x+9 3. y= radical(x^2 - 5x -14) 4. y= [cubed root(x-6)] / [radical(x^2 - x - 30)] I'm terrible at finding domains.. so any help with these problems would

    asked by April
  74. chemistry

    Identify the hydroxyl groups (O−H \rm O\!-\!H) by right-clicking each atom individually on the canvas and then mapping it to M1.

    asked by Anonymous
  75. Calculus

    There is this improper integral problem I've been given. I've completed most of it but still don't understand what I'd get, I don't quite get what it means to go from 'e' to 'infity'. What would I get? -ln(x)+1/x from 'e' to 'infinity' + -1/x from 'e' to

    asked by Isaac
  76. college stats

    Again sorry for all the questions. please help, I am not good at stats and find these questions very difficult. I would appreciate an explanation if possible. 1.What is the sample average? 2.What is the SD of the box? 3.What is the number of draws from the

    asked by penelope
  77. Essay

    Can someone help me please I have to write a essay on if you won a million dollars and cannot spend it on yourself or family what would you do with it. I need help to start it just the opening line please

    asked by Mark
  78. Calculus

    The question is find the area of the reagion that is bounded by the curve y=arctan x, x=0, x=1, and the x-axis. So I've drawn the enclosed region. To find the area would I use the Disc/shell method? If so the formula that I came up with looks like this: If

    asked by Isaac
  79. Calculus

    Find the derivative of the function. f(x) = ex8 - 6

    asked by Anonymous
  80. Calculus

    Find the derivative of the function. f(x)=ln(sqrt(x)+6)

    asked by Anonymous
  81. Calculus

    Find the derivative of the function. f(x) = text(ln)(9 x^2 - 3 x + 1)

    asked by Anonymous
  82. Calculus

    Find the derivative of the function. f(x) = ln((x6 - 7)6)

    asked by Anonymous
  83. Calculus

    Find the derivative of the function. f(x) = 6 (ln(x))^(5\/2)

    asked by Anonymous
  84. Calculus

    Find the derivative of the function. f(x) = e^x8 - 6

    asked by Anonymous
  85. Thermodynamics

    1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and

    asked by Danny
  86. physics

    Tyler flies a spaceship at a constant velocity of 79% the speed of light or 0.790c. Use appropriate units: h for hour, m for meter. Note that β and γ have no units. (a) The value of β = [(v)/(c)] ("beta") is

    asked by Anonymous
  87. Math

    If a circle is drawn that contains all four vertices of a rectangle(24x18) and the area of the circle is k(3.14) square centimeters, what is k?

    asked by Anonymous
  88. Computers C++

    1.) Look at the following array definition. int numbers[] = { 2, 4, 6, 8, 10 }; What will the following statement display? cout

    asked by Thomas
  89. Business Communications - English 101

    Should the sentence containing the word three be 3 instead. The rules states to use numbers that follow an identifying noun. I don't quite understand if "these" is considered identifying but I believe two or three should be written in words. If I should

    asked by MaryBeth
  90. Chem

    What does it mean when they say materials with the same properties but with different chemical composition? Can you give examples so that I can fully understand?

    asked by Kim