Popular questions and responses by Ed
  1. Math 2

    Rui is a professional deep water free diver. His altitude (in meters relative to sea level), xxx seconds after diving, is modeled by: d(x)=1/2x^2 -10x What is the lowest altitude Rui will reach? I actually don't understand this problem if its asking for

    asked on September 18, 2017
  2. Physics

    Ted Williams hits a baseball with an initial velocity of 120 miles per hour (176 ft/s) at an angle of θ = 35 degrees to the horizontal. The ball is struck 3 feet above home plate. You watch as the ball goes over the outfield wall 420 feet away and lands

    asked on January 18, 2013
  3. Math 2

    The rectangle below has an area of 30k^3+6k^2 The width of the rectangle (in meters) is equal to the greatest common monomial factor of 30k^3 and 6k^2 What is the width and length of the rectangle? Width:6k^2 Length: I couldn't find the length I need to be

    asked on September 10, 2017
  4. AP physics 1

    A 2.20kg toy plane takes off with an acceleration of 3.30m/s2 . The engine supplies a force of 8.15N . Determine the magnitude of drag force acting on the plane as it accelerates.

    asked on July 16, 2019
  5. math

    If two dice are rolled one time, find the probability of getting a sum less than 5.

    asked on November 17, 2012
  6. physics

    A person jumps off a diving board 4.3 above the water's surface into a deep pool. The person's downward motion stops 2.1 below the surface of the water.

    asked on September 7, 2011
  7. Math

    A die is rolled twice. What is the probability that the sum of the rolls is less than 4 given that one of the rolls is a 1? The answer is 3/11. Could someone tell me how to get this. Thanks?

    asked on May 7, 2011
  8. Managerial econ 1

    1)The Midnight hour, a local nightclub, earned $100,000 in accounting profit last year. This year the owner, who had invested $ 1 million in the club, decided to close the club. What can you say about economic profit (and the rate of return)in the

    asked on July 24, 2007
  9. Economics/Marginal Analysis

    21st Century Electronics has discovered a theft problem at its warehouse and has decided to hire security guards. The firm wants to hire the optimal number of guards. The follwoign table shows how the number of security guards affects the number of radios

    asked on June 1, 2007
  10. Physics

    The sun is 30 ∘ above the horizon. It makes a 54 m -long shadow of a tall tree.

    asked on September 8, 2016
  11. Economics

    I think I get this but could use some guidance to make sure, I am having problems with 2e). 1)In an article about the financial problems of USA Today, Newsweek, reported that the paper was losing about $20 million a year. A Wall Street analyst said that

    asked on June 19, 2007
  12. Marginal Analysis

    Applacian Coal Mine Co believes it can increase labor productivity and therefore, net revenue by reducing air pollution in its mines. It is estimated that the marginal cost for reducing pollution by installing additional capital equipment is MC =

    asked on June 1, 2007
  13. physics

    At a circus, a human cannonball is shot from a cannon at 15m/s at an angle of 40 degrees from horizontal. She leaves the cannon 1m off the ground and lands on the way down in a net 2m off the ground. Determine her horizontal displacement.

    asked on February 13, 2012
  14. physics

    Two friends are sitting in a stationary canoe. At the person at the front tosses a sack to theperson in the rear, who catches the sack 2 later. Which plot in the figure shows thevelocity of the boat as a function of time? Positive velocity isforward,

    asked on February 9, 2011
  15. Phyiosics

    Three point charges lie in a straight line along the y-axis. A charge of q1 = -9.50 µC is at y = 6.30 m, and a charge of q2 = -7.20 µC is at y = -4.00 m. The net electric force on the third point charge is zero. Where is this charge located? y = m

    asked on December 19, 2010
  16. Economics Help!

    4) The manager of Collins Import Autos believes that the number of cars sold in a day (Q) depends on two factor: (1) the number of hours the dealership is open (H) and (2) the number of salespersons working that day (S). After collecting the data for two

    asked on June 4, 2007
  17. Maths

    A ball is thrown vertically upwards at 3 m s-1 from 1m above ground level (I) write down the equation for the height of the ball above the ground after t seconds (while the ball is in the air). (II) use your answer to find the time it takes the ball to

    asked on November 17, 2016
  18. Finance

    Which of the following best states the difference between seed capital and startup capital? Seed capital is for research and planning while startup capital is for operating expenses. Seed capital is provided by venture capitalists while startup capital is

    asked on November 12, 2014
  19. Math

    What is the probability oi rolling a total of 7 in two rolls of a standard die if you get an even number of the first roll? Could someone please help me? Thanks

    asked on May 8, 2011
  20. Physics

    What minimum coefficient of friction between the tires and the road will allow a 3700 kg truck to navigate an unbanked curve of radius 25 m at a speed of 45 km/h? My answer: Fnet=ma Ff=m(v2)/r) Ff=(3700)(452/25) Ff=(3700)(2025/25) Ff=(3700)(81) Ff=299700

    asked on November 19, 2010
  21. Chemistry

    Could some please tell me if I did this problem correctly? Assume that at a given temperature, there is 1 g of CO2 gas in a one liter volume. How much mass of O2 would there be at the same temperature, in the same volume? My answer: Step 1) Find the number

    asked on October 22, 2009
  22. Econ

    The economy contains 2000 $1 bills. a) If people hold all money as currency, what is the quantity of money? b) If people hold all money as demand deposits and banks maintian 100 % reserves, what is the quantity of money? c) If people hold equal amounts of

    asked on July 12, 2007
  23. Electrical theory

    a series RL circuit contains two resistors and two inductors. the resistors are 33 ohms and 47 ohms. inductors have inductive reactances of 60 ohms and 30 ohms. the applied voltage is 120 volts. what is the voltage drop on the 33 ohm resistor?

    asked on October 28, 2015
  24. Economics

    Are chickens and and cows examples of capital goods? Capital goods are items used in the creation of other goods. Because chickens create eggs and cows make milk, are they consumer goods?

    asked on February 1, 2011
  25. history

    Heather bought a ten-year maturity corporate bond when it was issued for $1,000. The bond has an annual interest rate of seven percent and pays interest semi-annually. How much does she receive every six months?

    asked on November 4, 2010
  26. math 7/8 grd

    d+s ˃ -3 d ˃ -7 find s it says the answer is 4 (s=4) but it seems not ok because depending on d the number can be pretty much anything

    asked on November 14, 2017
  27. Chemistry

    The gas phase reaction X+Y⇄ Z is first order in Y and second order in X. If the concentration of X is double and concentration of Y is tripled. The reaction rate would be increase by a factor of: then, Rate= k [x]^2[y] --> k[x]^4[y}^3 is this the correct

    asked on June 14, 2016
  28. math

    A brownie cake recipe requires 2 1/2 cup of sugar. The amount of flour needed is 1/2 cup more than twice the amount of sugar. How much flour is required?

    asked on May 14, 2015
  29. basic electronics

    What would happen if the two pith balls shown in Figure A-1 were held together for a few moments, then released? A. The charge would leak off and the pith balls would hang straight down. B. The pith balls would each receive a negative charge and they would

    asked on January 16, 2014

    a 50 kg person running to the east at 8.5 m/s jumps into a 100 kg initially at rest. A)find the velocity of the wagon and person together as they move away.B) If they coast 30 m before coming to a stop, find the average force of the friction that slows

    asked on October 12, 2011
  31. Physics

    Acceleration due to gravity is 9.81 m/s/s. What is the weight (in Newtons) of a 97.96 kg mass?

    asked on May 30, 2011
  32. History

    Washington's main objective as president of the united states was to: (1) set up a court similar to that of Eurpoean monarchs. (2) establish respect for the office of presidency. (3) keep peace between the northern and southern states. (4) maintain his

    asked on January 6, 2010
  33. Help from The Economyst

    I have put together my set of questions that I posted and answered them with yor help and direction, would you mind looking at the finished product for correctness. I still got lost on some of it I think. I could send them to you. EY Post them. We do not

    asked on June 10, 2007
  34. Science

    Please help me with these questions from the Science 6: Forces and Motions Unit Test. My answer-****** 1. Which of the following best describes the movement of an object at rest if no outside forces act on it? (1 point) It will move due to inertia. Gravity

    asked on May 21, 2018
  35. math 7/8 grd

    d+s ˃ -3 d˃-7 find s the answer supposed to be 4, but I think it is not correct, because depending on d it might be pretty much anything.. any thoughts?

    asked on November 14, 2017
  36. Maths

    a circus artist drops a ball from a high wire. The ball takes 1.5 seconds to reach the ground. (i) Find the height of the high wire above the ground (ii) write an expression for the speed of the ball t seconds after it's dropped where 0

    asked on November 17, 2016
  37. Chemistry

    Methyl amine is a weak base with a pKb=3.35. Consider the titration of 30.0mL of .030M of Methyl amine with 0.025M HCl. a) Write the appropriate equation for the reaction. b) Calculate K for the reaction in part (a). c) Calculate pH of the initial methyl

    asked on April 27, 2016
  38. University physics

    "A droplet of oil carries an extra charge of one electron and is held motionless between parallel plates separated by 1.80 cm across which there is a potential difference of 55.5 kV. What is the mass of the droplet?" I assumed that this whole thing was

    asked on February 10, 2016
  39. Math

    Twice the square of a positive number increased by three times the number is 14. Find the number.

    asked on May 12, 2015
  40. Math

    Jason is a salesperson in the electronics department store. He is 38% short of his goal for the week. His goal is to earn %450. For each CD player he sells, he earns $57. How many CD players does he need to sell in order to meet his goal?

    asked on September 22, 2014
  41. statistics

    A researcher is testing the effect of a new cold and flu medication on mental alertness. A sample of n=9 college students is obtained and each student is given the normal dose of the medicine. Thirty minutes later, each students performance is measured on

    asked on April 29, 2014
  42. math

    I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and

    asked on May 4, 2013
  43. Physical Science

    Predict how each of the following changes will affect the following reaction involving gaseous reactants and products: 2NO2 = N2O4 + heat a. the temperature is increased. b. the pressure is increase. c. N2O4 is removed from the equilibrium mixtur. d. NO2

    asked on February 8, 2013
  44. physics

    Initially, a particle is moving at 5.30 m/s at an angle of 35.0° above the horizontal (+x axis). Two seconds later, its velocity is 5.97 m/s at an angle of 50.0° below the horizontal. What was the particle's average acceleration during this time

    asked on November 10, 2012
  45. Physics

    A certain p-channel JFET has a VGS(off) = +6V. What is ID when VGS = +8V?

    asked on March 9, 2012
  46. physics

    A football kicker lines up to kick a game winning kick. The goalpost is 30m away and the ball must clear the 3.3m high cross-bar. If the kick leaves his foot at an angle of 35 degrees, how fast must the kick be to clear the bar?

    asked on February 13, 2012
  47. Calculus

    Two forces of equal magnitude act to 60 degrees. If their resultant has a magnitude of 30N, find the magnitude of the equal forces.

    asked on February 11, 2012
  48. physics

    A net force of 265 N will accelerate how much mass at 0.5 m/s/s?

    asked on May 30, 2011
  49. Government

    Authority possessed by both the state and national government that may be exercised separately and simultaneously are called...... powers. These powers may not be exclusively within the scope of the national power or in conflict with the national law.

    asked on May 12, 2011
  50. Economics

    Does the demand-pull theory represent a leakage or injection in the economy? I'm confused.

    asked on May 9, 2011
  51. Chemistry

    If calcium carbonate) and aluminum silicate are mixed together and heated then the result is cement. Cement is a mixture of calcium oxide, carbon dioxide, aluminum oxide, and calcium silicate. Write the balanced equation for this reaction. My Answer:

    asked on January 28, 2011
  52. Math

    Using the binomial theorem, Find the first three terms in the expansion of (x-(1/x))^5. My solution: C(5,0)x5 + C(5,1)(x4)(-1/x) + C(5,2)(x3)(-1/x)2 x5 + (5)(x4)(-1/x) + 10(x3)(-1/x)2 x5 + (-5x4/x) + 10(x3)(1/x2) x5 + (-5x3) + 10(x) x5 -5x3 + 10x The first

    asked on January 10, 2011
  53. Physics

    In an accidental explosion, a satellite breaks in half while in circular orbit about earth. One half is brought momentarily to rest. What is the fate of the half brought to rest? What happens to the other half?

    asked on October 20, 2010
  54. Managerial Econmics

    Q4: Ch 5 (10%) In terms of the consumer theory set forth in this chapter, can you explain the meaning of the following statements? a. “I think you get more for your money from Nike than from Reebok.” b. “I wanted to buy a Boxster rather than a

    asked on October 10, 2010
  55. Math

    Find the value of the following. 10^(-10log3) The log exponent is confusing me. Could someone please help me? Thanks.

    asked on September 8, 2010
  56. geometry

    find x 40x+50=150

    asked on April 27, 2010
  57. math

    Ed, Ethan and Nathan are playing a game. Ed has won11 rounds, Ethan has won 8 rounds, and Nathan has won 1 round. Write the relative frequency of Ed not winning a round as a percent. 45%? Is my Answer correct?

    asked on March 9, 2010
  58. Bible Fill In The Blank

    1. God can use suffering to cause us to ? spiritually and to bring ? to Himself. I Think the first one is "grow". I'm not sure about the other one. I'm Not Sure For Numbers 2-4 (Below). Please Help Me! 2. Ethical, doctrinal, numerical, and factual

    asked on January 11, 2010
  59. History

    During the period of the Crusades, warfare between Christians and Muslims lasted nearly ? years 50 300 200 100

    asked on November 16, 2009
  60. AP physics

    a small ball of mass .85 kg is attached to one end of a 1 m long massless rod, and the other end of the rod is hung from a pivot. When the resulting pendulum is 25 degrees from the vertical, what is the magnitude of the torque about the pivot?

    asked on January 28, 2008
  61. AP Physics

    A flywheel turns through 46 rev as it slows from an angular speed of 3.1 rad/s to a stop. Assuming a constant angular acceleration, find the time for it to come to rest? What is its angular acceleration (in rad/s^2) ? How much time is required for it to

    asked on January 27, 2008
  62. Managerial Economics Question

    1)The Midnight hour, a local nightclub, earned $100,000 in accounting profit last year. This year the owner, who had invested $ 1 million in the club, decided to close the club. What can you say about economic profit (and the rate of return)in the

    asked on July 26, 2007
  63. Managerial Econ 2

    1)The chief economist for Argus Corporation, a large appliance mfg., estimated the firm’s short-run cost function for vacuum cleaners using an average variable cost function of the form: 3 AVC = a + bQ + cQ Where AVC = dollars per vacuum cleaner and Q =

    asked on July 19, 2007
  64. Managerial Economics

    I'm not sure I have the formulas correct for this problem and I do not know what the labor hours are.... Dimex Company, a sheet-metal mfg., estimates its long run production function is: 3 3 2 2 Q = -0.015625K L + 10K L where Q is the number of body panels

    asked on July 19, 2007
  65. Math

    How to factor x^3 - 3x^2 + 4 =0 Use D'Alembert's Rational Roots Theorem. Any rational roots of the form of p/q (p and q assumed to be relatively prime) must be such that p divides the constant term (in this case 4) and q divides the coefficient of the

    asked on July 14, 2007
  66. Economics, Marginal Utilities

    Help Economyst.... 1) I think I get this one but maybe n not? Bridget has a limited income and comsumes only wine and cheese, her current consumption is four bottles of wine and 10 pounds of cheese. The price of the wine is $10 per bottle and the price of

    asked on June 11, 2007
  67. algebra


    asked on February 11, 2020
  68. Math

    how many different four person committees can be formed from a group of five boys and four girls

    asked on October 2, 2019
  69. Math

    Problem: Ms. Ashol has 20 boys and 16 girls in her mathematics class. If she chooses two students at random to work on the blackboard, what is the probability that both students chosen are girls? What I did : I added the boys and girls 36 (16c2)/(36c16)

    asked on September 24, 2019
  70. Math

    How many different four-person committed can be formed from a group of six boys and four girls? I don’t understand how to do this problem or set it up at all

    asked on September 24, 2019
  71. Math

    From a standard deck of cards, what is the probability you will select: You select one card and it is an ace and black? All I know is a an ace is 4 and there is 26 blacks

    asked on September 12, 2019
  72. Algebra

    Using the function f(X)=-3X+1 find f(2M+5)

    asked on January 8, 2019
  73. probability

    Marie distributes toys for toddlers. She makes visits to households and gives away one toy only on visits for which the door is answered and a toddler is in residence. On any visit, the probability of the door being answered is 3/4, and the probability

    asked on November 28, 2018
  74. probability

    A factory produces copper wires. A blue mark is placed on a very long length of copper. The wire is then cut into pieces. The lengths of different pieces are independent, and the length of each piece is distributed according to the same PDF fX(x). Let R be

    asked on November 28, 2018
  75. Math 7th gr

    it is about bowling, your final score is 14 less than your friends, did you have a spare in the 10th round? 9th round 10th final friend 8 - 7 / 6 105 89 105 you 6 3 9 82 I don't know bowling, so it is a bit unfair.. the final should be 105-14=91 and since

    asked on August 29, 2018
  76. math 7 grd

    you have to design a space station (model) that has a 120 cm3 volume, and it has to have the possible smallest surface area. it must contain 3 different shapes. (cone and sphere surface are was not covered, only their volume, so they are out....we can

    asked on April 19, 2018
  77. math 7/8 grade

    I am having hard time with this question. What are the possible dimensions of the Khufu pyramid, based on the information (asking height, side lengths, slant height) " According to this site 115,000-200,000 casing stones were used The stone blocks usually

    asked on April 18, 2018
  78. Maths

    The Random Variable X is normally distributed with mean 560 and standard deviation 20. Find P(X

    asked on February 26, 2018
  79. 6 grade math

    wile catching fireflies, you and your friend decide to have a competition. after m minutes, you have (3m +13) fireflies and your friend has (4m+6) fireflies. a. how many fireflies are caught per minute? b. ow many fireflies caught before the competition?

    asked on October 21, 2017
  80. Math 2

    Graph g(x)=−6(x−2)(x) Ok so I don't know how to do this because it isent two binomials but if you can help me this is what I got Vertex:1,6 X-intercpts: x=2 Is that right if not explain it to me please!

    asked on September 18, 2017
  81. Math

    How can I graph this equation: (x-squared + y-squared - 1)cubed = x-squared times y-cubed ? Is there a polar form of the equation?

    asked on July 21, 2017
  82. algebra

    Miranda worked two part-time jobs last week. The first job paid $8 an hour, and the second job paid $11 an hour. She worked a total of 23 hours last week and earned $208. How many hours did Miranda work at the first job?

    asked on July 17, 2017
  83. math

    Time Height (Weeks) (CM) 1 1 2 4 3 6 4 9 5 11 ~Ok i have this problem and its a correlation coefficient, There is a lot of questions but how would you find if its linear or exponential.

    asked on March 29, 2017
  84. algebra

    Delaney needs to rent a car while on vacation. The rental company charges $17.95, plus 16 cents for each mile driven. If Delaney only has $50 to spend on the car rental, what is the maximum number of miles she can drive?

    asked on March 11, 2017
  85. Chemistry

    Identify the chemical reactants in ZnCl2(aq)+H2(g)?

    asked on March 5, 2017
  86. Algebra

    manuella likes pepperoni, mushroom, and extra cheese on her pizza. how many different pizzas can she order with one, two, or all three of these toppings?

    asked on March 2, 2017
  87. math

    the gas tank in jocko's car hold 12 gallons when it's full. the car gets 18 mi/ gal. How far can he travel on two full tanks

    asked on October 11, 2016
  88. math age problem

    I am 10 less than four times my age six years ago how old am I now

    asked on September 5, 2016
  89. Calculus

    Solve the following equation on the interval [0,2pi) if sin = -0.29?

    asked on August 21, 2016
  90. Calculate y' and y'' at the point (1,1)

    Calculate y' and y'' at the point (1,1) on the curve 5 xy^2+9 y-14 = 0 I got the first part (-5/19) but I can't get the answer for the second

    asked on July 12, 2016
  91. Math

    Calculate y' and y'' at the point (1,1) on the curve 5 xy^2+9 y-14 = 0 I got the first part (-5/19) but I can't get the answer for the second

    asked on July 12, 2016
  92. physical science

    you are riding in a car traveling at 60mi/hr in a 50 mi/hr zone. you spot a policeman 10 feet ahead. you slow down with an acceleration of -2ft/sec2 for 3 seconds. Do you get a ticket

    asked on June 14, 2016
  93. University physics

    "Consider a long charged straight wire that lies fixed and a particle of charge +2e and mass 6.70×10-27 kg. When the particle is at a distance 1.61 cm from the wire it has a speed 2.70×105 m/s, going away from the wire. When it is at a new distance of

    asked on February 10, 2016
  94. Definition

    In which sentence is the word SPUTTERS used correctly? a.The engine SPUTTERS when it is started in the cold. b.The ball SPUTTERS as it bounces across the court. c.That tree SPUTTERS when it drops its leaves. d.The wave SPUTTERS as it breaks over the beach

    asked on February 2, 2016
  95. Algebra 2

    Mario took a 17 day trip around the U.S. He visited Boston, Miami, Philadelphia and New York. In Boston he spent $200 per day, in Miami $225 per day, in Philadelphia $175 per day and in New York he spent $150 a day for a total of $3400. The number of days

    asked on November 28, 2015
  96. World history

    What was the biggest change? Where? Why? Japan China Europe Africa

    asked on November 9, 2015
  97. 4th grade math

    there are 4 possible scoring plays in an NFL football game (T) touch down -6 points (A) point after touchdown can only be earn with a touch down) - 1 point (F) field goal - 3 points (S) safety - 2 points 1. how many different ways could the team score 11

    asked on November 9, 2015
  98. World history

    What development produced the greatest instability? Where? Why? Japan China Africa Europe

    asked on November 9, 2015
  99. World history

    Who benefited the least from the development of feudal systems? Explain why Japan China Africa Europe

    asked on November 9, 2015
  100. World history

    Who benefitted the least from the development of feudal system? Explain why Japan China Africa Europe

    asked on November 9, 2015


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