Search results

  1. F

    Marketing Research (Cost, Revenue, Etc.)

    The reason I said px is because p was used as the variable for price above. So I had profit=price*number sold - cost
  2. F

    Marketing Research (Cost, Revenue, Etc.)

    And how do I find that? I'm sorry, I realize this is probably more frustrating for you than me, but math is not my strong suit (obviously).
  3. F

    Marketing Research (Cost, Revenue, Etc.)

    So for the profit function do I just put it as P(x)=px-(47.3575+1.182x) and leave it as that?
  4. F

    Marketing Research (Cost, Revenue, Etc.)

    What should I use instead of the 4 weeks then? And I used 3.5 because of the prices that I sold for in the past, it gave the most revenue. And I don't know how to find the max of a function in general. Above poster said set the derivative to 0, but what would that look like?
  5. F

    Marketing Research (Cost, Revenue, Etc.)

    I wasn't sure if I was just supposed to draw from the amounts that had previously been sold. I just took 3.50 from how much it had been sold for (from those listed prices) that gave maximum revenue. What am I supposed to use for the profit equation?
  6. F

    Marketing Research (Cost, Revenue, Etc.)

    1. Homework Statement A local grocery store has agreed to sell your homemade bread. You will use the following information along with some ideas from Chapter 3 to decide how many loaves should be manufactured each week and what price should be charged. After tracking weekly sales at several...
  7. F

    Given Current and Resistance in a Circuit, find the Voltage of a Battery

    Oh duh! I always forget to just stick to one loop. I took off one of the 14.7s and got 100.4 as the correct answer. Thank you so much for sticking with me through that. I really appreciate it.
  8. F

    Given Current and Resistance in a Circuit, find the Voltage of a Battery

    So 3.14 is the circuit current, and I used that to get the voltages at all the resistors. The only thing I don't know now is how to get the battery's voltage. I know that KVL states that all voltages should add to 0, so would that mean that I add up the voltages (47.1+38.622+14.7+14.7)? That...
  9. F

    Given Current and Resistance in a Circuit, find the Voltage of a Battery

    Ok so I got 1.92 A for that, by taking 14.7 V divided by 7.66. That is the current for the middle branch if the calculations are correct. Now I combine those and that gives me the current for the first two resistors?
  10. F

    Given Current and Resistance in a Circuit, find the Voltage of a Battery

    So I don't need the current for that at all then. I can just add up the voltages to 14.7 V and say that since they are in parallel, the voltage across that middle branch is 14.7 as well. Now, do I apply the 1.22 A of current to the 15 Ohm and 12.3 Ohm resistors and then add up all the voltages?
  11. F

    Given Current and Resistance in a Circuit, find the Voltage of a Battery

    Alright so I'm starting at the 7.95 Ohm resistor and going forward, calculating the Voltage. I got 9.7 V for the 7.95 Ohm, and 5.01 V for the 4.11 Ohm. What do I do when I get to the 13.8 and 17.2 one in the middle. How do I know how the current splits up and how much enters those parallel...
  12. F

    Given Current and Resistance in a Circuit, find the Voltage of a Battery

    Oh, good to know! What exactly do you mean by KVL and KCL?
  13. F

    Given Current and Resistance in a Circuit, find the Voltage of a Battery

    1. Consider the group of resistors in the figure, where R1 = 12.3 and R2 = 7.95http://www.webassign.net/images/omegacap.gif. [Broken] The current flowing through the 7.95[PLAIN]http://www.webassign.net/images/omegacap.gif resistor is 1.22 A. What is the voltage of the batter...
  14. F

    Period and Spring Constant

    Just solved it, not sure why I had to multiply it by .25 instead of .5 but I took a guess and it worked.
  15. F

    Period and Spring Constant

    A 870·kg car strikes a huge spring at a speed of 16·m/s, compressing it 10.0·m. How long does it take the spring to stop the car? 2. Homework Equations - T= 2pi√m/k I don't know why I can't get this problem right. I have 2pi√870/2227.2=3.92 then you would divide that by 2 because it's...
  16. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    Alright well I guess it's just different for me. Jesus. Well anyways thanks for the help.
  17. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    Add another equation? I'm sorry I'm struggling with this so much. Very frustrating
  18. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    I just don't know what to put for Vhy or Vhx when putting it in to the conservation of energy equation to solve for the speed of the neutron. And how would I find the angle? which is the first part of the question
  19. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    Sorry I just have 10 minutes to get this answer in so I'm trying to hurry. Will take me from an 85% to a 97% on the hw. I really appreciate all the help you've given me so far though
  20. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    Ok I was thinking that I'd do that. Then what would I substitute in for Vh?
  21. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    Ah good point. So then it is just that equation with the masses being...? Not sure on that. Would I put Vhelium as sinθ*Vhy?
  22. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    Really I'm unsure about what to do with the masses. Do I need to put in a value for them? Or just do 1 and 2 for them after multiplying by half for all of the figures in the energy
  23. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    That energy of the system is conserved. Is that not what I did?
  24. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    I have Mneutron(5.6*10^5)^2 = Mneutron(5.6*10^5)^2 + 2Mhelium(Vhelium)^2 Not sure how to proceed if that is even right
  25. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    What would my conservation of energy equation look like?
  26. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    Can anyone help me with this problem? It's been kicking my *** for days and it's due tonight
  27. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    Alright here is the work that I've done so far. I have the two equations but I don't really know how to proceed because I have so many unknowns. Also I'm not sure where I should put sin41 and cos41. Obviously the sin would go in the Y equation and cos in the X but I'm not sure where exactly it...
  28. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    So what would I put for the equation then? Would I have to put the velocity of the helium multiplied by the sin and cos of 41?
  29. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    How would that look exactly? I have mv(neutron)1 = mv(neutron)2 + 4mv(helium)2 Is that close?
  30. F

    Elastic Neutron Collision (Conservation of Momentum and Energy?)

    1. A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to rebound at an angle '2 = 41° from the neutron's initial direction. The neutron's initial speed is 5.6 105 m/s. Determine the angle at...
Top