Recent content by Elpinetos

Thanks, I overlooked the v

Okay, so this equation comes from the derivative of s(x)=\frac{600v}{1.4+0.0025*v^{2.4}} But Wolfram Alpha tells me the derivative is wrong? Oo What did I do wrong? s'(x)=\frac{600(1.4+0.0025v^{2.4})-600v(0.006v^{1.4})}{(1.4+0.0025*v^{2.4})^{2}}...

Homework Statement In my work I am stuck at this equation: 840+1.5v^{2.4}-3.6v^{1.4}=0 I am looking for a quick, easy way to solve this. Any suggestions? I am kinda tired right now and nothing comes to my mind except maybe Newtons method?

Yeah it does. It states 1 unit = 1cm and the Volume in cl Thank you though :)

4.6L Lemonsqueezer? Okay thank you^^

Homework Statement f(x)=\frac{1}{81}*x^4-\frac{5}{9}*x^2+4 The tangent in Point P(6|0) when rotated around the y-Axis gives the Shape of the Squeezer. The bottom is at y=-5, the top at y=0 The Attempt at a Solution First I calculated the tangent and got t: y=4x-24 Then I converted that to...

Thank you, this helps a lot :) Any tips on how to best approach such problems? What should I look out for? How do I start best?

I see now, thank you. What I still don't fully understand is how to make the first equation in such examples. I now understand how they got to it in this particular example, but how do I even approach such a problem? Where do I start? I somehow wouldn't have thought of taking the distance...

I understand how they get from the first to the second equation. I don't understand how they get the first equation from the information given.

Homework Statement Through a sample, a party A wants to determine the percentage p of the voters, who voted for party A. They want to determine p with a 90% certainty to 5%. How many people do they need to survey? Let X be the amount of party-A-voters from n surveyed people. I don't need the...

Of course I know that, I have been studying the whole time, from a textbook I purchased. I would just like to find some math problems online, including the solutions, if possible with the different steps to get to those solutions. I'll look through the links later, thank you so far :)

Nearly a month and no reply yet? :(

Hi guys, I am currently self-studying math for my GED (Matura in Austria), and I kinda need to step up my game by a lot. I do not attend any courses, nor do I plan to do so. I've been trying to learn from the school textbooks, but since they do not provide answers, nor approach hints or tips...

Ahhhhhh now it makes sense. What I calculated was basically for a pyramid, not a cone, wasn't it? :) Though, where is the similar triangle stated in the overview of the problems? The problem is listed under "solve these using similar triangle relationships"

Hey, sorry, I've been busy the last couple of days The figure you posted pretty much corresponds to my figure in post #6, where I still fail to see why H/R = h/R-a/2 is incorrect What would be the correct side condition?