Thanks for the reply! I actually ended up getting the right answer b/c I worked out the problem out in mathematica and it correctly simplified. However, I didn't notice (what you and Mathematica did) the discrepancy between my written work (posted) and my code ergo my erroneous function y(120)...
I figured it out... the step where I let k = e^c is the problem. Leaving e^c and continuing we would have:
y = e^(4c)/(250+4t)
Letting k = e^(4c)...
y = k/(250+4t)
Solving for k = 15000...
Now solving for c to find the numerator in the expression for y...
15000 = e^(4c)
c =...
Homework Statement
Alright, I know this has been done in various incarnations but I haven't found an example exactly similar to mine..
A tank contains 60kg of salt and 1000L of water. Pure water enters the tank at the rate of 8L/min. The solution is thoroughly mixed and drains at a rate...