Newest questions and responses by tom
  1. calc

    integrate (x-2) / (x+1)^2 +4 dx

    asked on December 1, 2018
  2. Physics

    A horse trots at 10m/s for 5 s and then turns around and walks back in the other direction at 2.5m/s for 30 s. a) what distance did the horse travel? b) what is its displacement? c) what is its average speed? d) what is its average velocity?

    asked on November 15, 2018
  3. Physics

    if an elevator starts from rest and rises with an acceleration of +0.29m/s^2. If each floor is 3m high, a) how long does it take to pass the 12th floor? b) how fast is the elevator going when it passes the 5th floor?

    asked on November 8, 2018
  4. science

    who discovered the optimal angle to launch projectile

    asked on November 4, 2018
  5. ap calculus bc

    the jewelry box will have rectangular sides and an open top. the longer sides will be made of gold at a cost of $300/in^2 and the shorter sides will be made from platinum at a price of $550/in^2. the bottom of the box will be made from plywood at a cost of

    asked on October 27, 2018
  6. chemistry

    Calculate the volume required for complete neutralization of 60.00mL of 0.1500 M KOH(aq). a) 0.1500M nitric acid, HNO3. The answer I got for this question is 0.06 using method c1v1=c2v2 but I want to show using unit analysis. Please help me know how to do

    asked on October 21, 2018
  7. physics

    In the diagram below, a water wave having a speed of 0.25 meter per second causes a cork to move up and down 4.0 times in 8.0 seconds. What is the wavelength of the wave is it 2m?

    asked on October 4, 2018
  8. physics

    another ball is thrown vertically upwards and returns to the ground 5 seconds later. the height to which the ball rises is approx

    asked on October 3, 2018
  9. calculus

    f(x)= 1/4 * (sin2x)^2 find dy/dx d/dx (1/4 * (sin2x)^2)= (sin2xcos2x)/ 2 ?

    asked on September 23, 2018
  10. art

    Modernism focused on the distinction between “high” and “low” culture in fine art. Which of the following reacted against this distinction by incorporating images from “lowbrow” culture into works of fine art? a)Minimalism b)Pop Art c)Site

    asked on September 21, 2018
  11. Science

    You need to make a 150mM solution of NaCl (MW = 58). How much NaCl do you need to make 1L (in moles and in grams)? If you b need to make 250mL how much NaCl would you need in grams?

    asked on September 19, 2018
  12. calc

    d/dx (cot(x) / sin(x)) = I got dy/dx= -csc(x) - cos(x)cot(x)

    asked on September 18, 2018
  13. Physics

    solve for h in the equation for density P= M/V and V= pi r squared h

    asked on August 28, 2018
  14. algebra

    A car was stopped at a red light. When the light turns green, the car reaches a speed of 41 miles per hour in 1 seconds. What is the acceleration, to 1 decimal place?

    asked on August 7, 2018
  15. Chemistry

    What is the concentration of an unknown sulfuric acid solution if 0.2M Sodium hydroxide is titration to neutralize the acid? The initial volume of the Sodium hydroxide is .50ml and the final volume is 30.75 ml. There is 35mL of acid.

    asked on July 13, 2018
  16. Chemistry

    What is the concentration of a solution of sodium hydroxide if I mix 15.0g of sodium hydroxide with enough water to make 500.0ml of solution?

    asked on July 13, 2018
  17. Chemistry

    Can you show me how to calculate this equation? What is the concentration of phosphoric acid solution of 30.0ml of a 0.2M of Potassium hydroxide is used to neutralize. The volume of acid is 20.0ml.

    asked on July 13, 2018
  18. Chemistry

    1. how many grams of KOH will neutralize (react with) 0.15 mol HNO3 2. how many liters of 1 M HCl will neutralize 10 ML of 9.2 M NaOH

    asked on June 5, 2018
  19. Algebra

    In a 120 volt electrical circuit having a resistance of 16 ohms, the available power P in watts is a function of I, the amount of current flowing in amperes. If P(I)=120I-16I^2, how many amperes will produce the maximum power in the circuit? What is the

    asked on June 1, 2018
  20. Algebra

    Suppose that an object is dropped from the top of the leaning tower of pisa, 185 feet above the ground. The objects height in feet, h, after t seconds is given by the following fucntion: h(t)= -16t^2+185. How long will it take for the object to hit the

    asked on May 31, 2018
  21. Algebra

    As part of their half time show, the members of the band must walk diagonally from one corner of the football field to opposite corner. If the field is 100 yards long and 35 yards wide, how far must the band member's march?

    asked on May 31, 2018
  22. Algebra

    The area of a rectangular carpet is a^2+8a+3a+24 square units. What is the length and width of this carpet as an expression?

    asked on May 31, 2018
  23. Algebra

    A ball is thrown in an upward direction off a platform that is 45 feet high with an initial velocity of 60 feet per second. The height, in feet, of the ball at the time t is given by h(t)= -16t^2 + 60t + 45. The time, t, is given in seconds. Round all

    asked on May 30, 2018
  24. Algebra

    The ratio of the length to the width of a golden rectangle is (1 + √(5):2:.The dimensions of a garden form a golden rectangle. The width of the garden is 12 feet. Find the length L of the garden. Round your answer to the nearest foot.

    asked on May 24, 2018
  25. Math

    The length of a rectangular garden is 4 yards more than its width. The area of the garden is 60 square yards. Find the dimensions of the garden.

    asked on May 23, 2018
  26. algebra

    The width of a rectangle is 11 inches less than its length. Find the dimensions of the rectangle if the area is 80 square inches.

    asked on May 23, 2018
  27. Trigonometry

    Write 4 other points for (-3,11π/3) on -2π ≤ θ < 2π

    asked on May 21, 2018
  28. Trigonometry

    1. Convert r= 2/1+sinθ to cartesian 2. Convert y=3 to polar 3. Convert 3x^2+3y^2-6x=0 to polar

    asked on May 21, 2018
  29. math

    find [dy/dx] x^2 Using this : limit as the change of x —-> 0 for f(x + deltax) - f(x) —————————- deltax run through each step

    asked on May 17, 2018
  30. History

    who are the most influential people of the 1920's or 1930's Canadians

    asked on May 7, 2018
  31. History

    I am doing a History project and i need to know ranked 1 to 8, 8 most influential people of the 20's and 30's

    asked on May 7, 2018
  32. History

    what made the 1920's roaring

    asked on May 6, 2018
  33. History

    what were the four leading causes to the great depression

    asked on May 6, 2018
  34. Physics

    When the Philae probe landed on Comet 67P, it took approximately 28 minutes for a radio signal to be received at the European Space Operations Centre. Determine the distance (in metres) from the Philae probe to Earth.

    asked on April 30, 2018
  35. Trigonometry

    Write in standard form: -2y^2+x-4y+1=0

    asked on April 25, 2018
  36. Physics

    The note D above middle C has a frequency of 294 cycles per second, and the note E has a frequency of 330 cycles per second. A driver of a moving car sounds the horn, which emits an E tone, but a stationary observer hears a D tone. Calculate the speed at

    asked on April 25, 2018
  37. Maths

    Consider the cubic polynomial f(z) =z3−2z+ 4. Given that z = 1 +i is a root of f(z), determine all the roots of f(z) in C

    asked on April 24, 2018
  38. Engineering

    A heated spherical ceramic object (diameter= 10cm), initially at 1200k, is held in a large enclosure whose walls are maintained at a temperature of 300k. The sphere has an emissivity of 0.7. Properties of Sphere: Density =4500 kg/m^3, heat capacity= 400

    asked on April 10, 2018
  39. Geometry

    In a triangle, prove the perpendicular from the vertex opposite the side that is not less than either of the remaining sides falls within the triangle.

    asked on April 9, 2018
  40. Geometry

    For a point, give a construction of a line so the portion intercepted by the segments of a given angle are bisected at the point.

    asked on April 9, 2018
  41. SAT

    the collection of antique puppets, A(all older than) two hundred years, had been B(painstakingly) made for youngsters C(long since) gone. D(no change) find the mistake

    asked on April 7, 2018
  42. math

    the gross domestic product (GDP) of a certain country is growing at a constant rate. In 2009 the GDP was 125 billion dollars , and in 2011 it was 155 billion dollars. At what percentage rate will the GDP grow in 2014?

    asked on March 31, 2018
  43. AP Calculus Help Five Questions

    1. Find the particular solution to y " = 2sin(x) given the general solution y = -2sin(x) + Ax + B and the initial conditions y(pi/2) = 0 and y'(pi/2) = -2. 2. What function is a solution to the differential equation y ' - y = 0? 3. If dy/dx = cos^2(pi*y/4)

    asked on March 27, 2018
  44. AP Calculus

    Find the particular solution to y ' = 2sin(x) given the general solution is y = C - 2cos(x) and the initial condition y(pi/2) = 1

    asked on March 27, 2018
  45. AP Calculus

    Find the area of the region bounded by the curves y = sin^-1(x/2), y = 0, and x = 2 obtained by integrating with respect to y. Please include the definite integral and the antiderivative.

    asked on March 27, 2018
  46. calc

    cotx = - rad3 / 3 does x= 2pi/3 and 5pi/3?

    asked on March 19, 2018
  47. math

    (4x^4 - 4x^2 + 6x) / (x-4) show how youd divide this using synthetic divison

    asked on March 14, 2018
  48. history

    in the most basic terms, what is a tariff and what is it's purpose?

    asked on February 13, 2018
  49. math

    f(x)= 3x^2 +12x + 2 when you complete the square, is it y= 3(x+2)^2 - 10

    asked on February 12, 2018
  50. chemistry

    2NO2(g) N2O4(g) If 0.625mol of dinitrogen tetraoxide in 5.0L is allowed to come to equilibrium and at equilibrium has a concentration of 0.0750M, Calculate K for this reaction. Does K= 7.5?

    asked on February 10, 2018
  51. math

    -x^2 + 4x = 2 do you have to factor out a -1 before you complete the square? and whats the answer in vertex form?

    asked on February 9, 2018
  52. physics

    Two slits are 0.158 mm apart. A mixture of red light ( wavelength = 65 nm) and yellow green light (wavelength = 565 nm)falls on the slits. A flat observation screen is located 2.24 m away. What's the distance on the screen between the third order red

    asked on January 8, 2018
  53. physics

    Two point sources produce waves in phase with the same amplitude and wavelength. The sources are a distance d apart. The distance from the right bisector to a point on the second nodal line is x2. The distance between the sources is cut in half. What is

    asked on January 7, 2018
  54. physics

    Two small loudspeakers emit sound waves of the same amplitude and frequency in phase with each other. The waves produce an interference pattern such that the distance from the right bisector to a point P on the third nodal line is x3. The wavelength of the

    asked on January 7, 2018
  55. math

    2sec^2x - 3tanx - 5 = 0 over the interval 0 to 2pi x= 1.14, 4.28, 5.68, and 2.54 right?

    asked on January 3, 2018
  56. mathh

    2sec^2x -3tanx =5 for [0,2pi) Please solve for the values of x for me.

    asked on December 28, 2017
  57. math

    2sec^2x -3tanx =5 for [0,2pi)

    asked on December 27, 2017
  58. Math

    A ferris wheel has a radius of 20m and the bottom is 2m above the ground. The wheel makes one rev in 40 sec. If the rider gets on at 30^0 on the left of the lowest point going downwards, wirte the sine function to show this movement

    asked on December 22, 2017
  59. Math

    Some one gets on to a ferris wheel 30^0 left of the bottom. What would be the phase shift if I am writing a sine Function? Is it -120^0 or + 120^0. Please explain.

    asked on December 21, 2017
  60. calc

    lnx = x^3 + 1 i know x=1 but can you solve this algebraically?

    asked on December 18, 2017
  61. Physics

    A 72 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 12 m , and falls a total of 35 m . Calculate the maximum acceleration she experiences.

    asked on December 11, 2017
  62. Caluclus

    Find the point on the line 7x+1y−5=0 which is closest to the point (−2,−6).

    asked on December 8, 2017
  63. precalculus

    how to find the max and min of a sine function? For the maximum, do you do midline+ amplitude? For the midline- Amplitude? f(x)= 7cosx + 15 Max is 15+7=22 min is 15-7= 8

    asked on December 5, 2017
  64. information systems

    Assignment: You are required to briefly but properly document the functional requirements for an INVENTORY INFORMATION SYSTEM by creating the following using the correct symbols: 1. The description of the selected information system in the selected

    asked on December 3, 2017
  65. precalc

    y= -2cos(pi/6) + 8 whats the maximum and minimum?

    asked on November 20, 2017
  66. precalc

    y= -2cos(pi/6) + 8 whats the maximum and minimum?

    asked on November 19, 2017
  67. college chemistry

    if co2 were soluble in h2o, how would that affect the calculated value for molecular mass of the co2?

    asked on November 19, 2017

    The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter. The equation for the reaction is: HBr(aq) + KOH(aq) -------------> KBr(aq) + H2O(l) When 25.0 mL of 1.00 M HBr at a temperature of

    asked on November 17, 2017
  69. Chemistry

    How many liters of oxygen are required to react completely with 2.4 liters of hydrogen to form water? H2 + O2--> H2O?

    asked on November 17, 2017
  70. math

    85=5e^0.025x solve for x

    asked on November 9, 2017
  71. Math

    Simplify the algebraic expression: 7-2[3(2x-5)-(5x+3)

    asked on November 7, 2017
  72. Math

    Solve for X: 15-(3x-8) = 4x-5(3x-7)-25

    asked on November 7, 2017
  73. Math - Algebra

    Solve for X 15-(3x-8) = 4x-5(3x-7)-25

    asked on November 7, 2017
  74. Math - Algebraic expressions

    Simplify the Algebraic Expression 7-2[3(2x-5) - (5x+3)]

    asked on November 7, 2017
  75. Math - Algebraic equations

    A stamp collector bought 295 stamps for $87.75. The purchase included 5 cent, 25 cent, and 40 cent stamps. How many of each type stamp was purchased?

    asked on November 6, 2017
  76. Math Algebra

    A stamp collector bought 295 stamps for $87.75. The purchase included 5 cent, 25 cent, and 40 cent stamps. How many of each type stamp was purchased?

    asked on November 6, 2017
  77. Physics

    In an experiment conducted using the Young's double-slit apparatus, the separation between the slits is 20 µm. A first-order constructive interference fringe appears at an angle of 2.5o from the zeroth order (central) fringe. A. What wavelength of light

    asked on October 25, 2017
  78. Statistics

    There are two decks of cards. Each deck has a red, a yellow, a blue, and a green card in it. If a card is drawn, from the first deck, and then a second card drawn from the second deck, what is the probability that a red card and green card are drawn (not

    asked on October 18, 2017
  79. calculus

    3cotx - radical 3 = 0 solve for x please show it step by step

    asked on October 3, 2017
  80. Math please help!!!

    Solve the system of equations to find x,y,z (hint let d=x2 e=y2 and d=z2 . Find d e and f first) 2 means squared I don't have it on my keyboard. X2+y2+z2=9 3x2-y2-z2=7 Y2+2z2 =6

    asked on October 1, 2017
  81. Pre-calc

    Perform the operation and write the result in standard form. ___16___ 2x+2

    asked on September 29, 2017
  82. Pre-calc

    Find a polynomial function with -2 and 3-i.

    asked on September 29, 2017
  83. Economics

    The pricing of pharmaceutical products can be controversial. A recent example is EpiPen produced by Mylan which is used to treat anaphylaxis. The retail price of an EpiPen is $300, while industry sources estimate that it costs around $30 to produce each

    asked on September 27, 2017
  84. calc

    given that log2 3 = x, log 2 5=y and log 2 7 = z, express log 2 21 in terms of x,y, and z the 2 is the base

    asked on September 18, 2017
  85. calc

    tan3x= radical3 / 3

    asked on September 18, 2017
  86. calc

    sin2x = (radical 3)/ 2 solve each equation on the interval [0,2pi)

    asked on September 18, 2017
  87. Computational Thinking

    The Happy Cow Ice Cream Company manufactures several types of ice cream. Design a flowchart or pseudocode for a program that accepts an ice cream flavor (for example, “triple chocolate”), price per gallon, and number of gallons sold in the average

    asked on September 18, 2017
  88. Computational Thinking

    Anybody Help on this:The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design a flowchart or pseudocode for a

    asked on September 18, 2017
  89. calc

    csc -5pi/6 = is it -2?

    asked on September 17, 2017
  90. computer code

    Design a pseudocode for a program that accepts an ice cream flavor the price per gallon and number of gallons sold a year, display a message this flavor is the best seller having more than 40000 gallons a year sold

    asked on September 15, 2017
  91. CHEM

    If 100g of NaOH are reacted with 85.00g H3PO4, how many grams of Na3PO4 can be made? Make sure the final answer is in the correct number of sig figs. 3NaOH + 1H3PO4 ---> 1Na3PO4 + 3H2O I got 100g Na3PO4

    asked on September 13, 2017
  92. precalc

    (-2)^x = - 1/128 solve for x

    asked on September 12, 2017
  93. calculus

    if cos of theta= -4/5 and tan of theta > 0, find sin of theta

    asked on September 9, 2017
  94. math

    what is 3 5/6 minus 3/4

    asked on September 7, 2017
  95. college chem

    a student dissolves 1.0mole of sucrose in 1000 grams of water at 1.0atm. Compared to the boiling point of pure water , the boiling point of the solution is?

    asked on September 2, 2017
  96. college chem

    a 16 gram sample of oxygen has a volume of 11.2L at standard pressure . what is the temp of the oxygen ?

    asked on September 2, 2017
  97. Math - trigonmetric functions

    Determine whether -105° and -465° are co-terminal angles and can you show me the steps of how you did it

    asked on August 30, 2017
  98. Stats

    In the game Roulette, a ball spins on a circular wheel that is divided into 38 arcs of equal lenght, numbered 00, 0, 1, 2, ... , 35, 36. The number on the arc on which the ball stops is the outcome of one play of the game. The numbers are also colored as

    asked on July 13, 2017
  99. maths

    one number multiplied by three less than itself equals 18. If that number is positive, what is it? Please show working.

    asked on June 14, 2017
  100. Algebra

    Write an absolute value inequality to fit the graph below: There is a Number line with 14 on the left and 26 on the right with solid dots on both.

    asked on June 1, 2017


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