# Recent content by frownifdown

1. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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. ### 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...