Anyone good at Math? I need some help.

Ok guys I need some advice on how to go about doing this.

Ok here's the problem: "The Hold-It Container Co. is designing an open-top rectangular box, with a square base, that will hold 108 cubic centimeters."

Now the Question I Need Advice on: Express the surface area S as a function of the length x of a side of the base.

I have no idea how to go about this. Please give some advice if you can. Also the problem is in the Rational Functions chapter if that helps any.

Below is a picture reference of the problem (please excuse my MS Paint skills).

Surely there must be some smart people here who can help me.

umm,i think it is this way: (x^2)(y) equals 108,there you will have surface x and surface y..

I'd ask on Yahoo Answers, I don't think homework is allowed hereRobboElRobbo

No homework help threads here... sorry. :(chessmaster1989

[QUOTE="chessmaster1989"]No homework help threads here... sorry. :(UltimateGamer95

[QUOTE="chessmaster1989"]No homework help threads here... sorry. :(UltimateGamer95

[QUOTE="UltimateGamer95"][QUOTE="chessmaster1989"]No homework help threads here... sorry. :(LZ71

I never read 'em, just figured them out with a few warnings :P

[QUOTE="UltimateGamer95"][QUOTE="chessmaster1989"]No homework help threads here... sorry. :(darx55

[QUOTE="chessmaster1989"]No homework help threads here... sorry. :(UltimateGamer95

[QUOTE="darx55"][QUOTE="UltimateGamer95"] Where does it say that you can't get some help with homework?UltimateGamer95

i think you'll be ok.

also, i think the way to work it out is starting with something like this:

surface area base = x squared

surface area side = xy

volume = 108 cm cubed, so x squared times y = 108

so y = 108 divided by x squared

with taht, you can subsititute and make everything in terms of x, then solve, using total surface area equation of : x squared + 4xy

best of luck :)

uh... Brain Fart.. lol

What kind of math is this? I'm guessing it's supposed to be easy but tricky.

[QUOTE="UltimateGamer95"][QUOTE="darx55"] "- Homework threads: Please do your own homework. If you want to talk about something you learned in school or request some advice on a research topic, go for it. Academic topics are not forbidden. Asking for help in understanding a subject or specific problem is permitted, as long as you explain yourself and include enough information to start a discussion. However, please do not post homework problems and ask someone to solve them for you. These threads are disruptive because they do not generate discussion, and frankly you ought to be doing your own work anyway." i guess you're only asking for some advice so it's all good..from my point of view at least..shaunk89

i think you'll be ok.

also, i think the way to work it out is starting with something like this:

surface area base = x squared

surface area side = xy

therfore, total surface area = x squared + 4xy = 108

you can probably work it out from there, no?

uh... Brain Fart.. lol

What kind of math is this? I'm guessing it's supposed to be easy but tricky.

Gaming-Planet

[QUOTE="shaunk89"]

[QUOTE="UltimateGamer95"] Yeah I'm just asking for advice geeze. Besides how am I supposed to know which one of you is right? I will have to go through and solve the equation myself anyway.UltimateGamer95

i think you'll be ok.

also, i think the way to work it out is starting with something like this:

surface area base = x squared

surface area side = xy

therfore, total surface area = x squared + 4xy = 108

you can probably work it out from there, no?

sorry, i got it wrong, check the edited version

Sorry I suck at maths and can't help, but seriously, that no homework threads rule? What a ****ing joke :PThe_89

Volume = (x^2)y = 108 Surface area = (2x^2) + 8xy Brackets are unnecessary but are added to make it clearer. If you need to put it in just terms of x then: y = 108 / (x^2) Then substitute in for y Surface area = (2x^2) + 8x(108 / (x^2) = (2x^2) + (864x / x^2) You could simplify it more to get rid of that fraction but other than that it think that's about right. I'm currently doing the same sort of thing but with trig in it.markop2003

i only accounted for external surface area.....*facepalm*

but yeah TC, this is right, i got the same.

Alright I got it

so X = 10 and y = 1.08

then (10)^2 times 1.08 = 108

so does that mean that the function F(x) = x^2 + 4xy is the correct answer or did I miss something? Give me a hint

so does that mean that the function F(x) = x^2 + 4xy is the correct answer or did I miss something? Give me a hintUltimateGamer95

[QUOTE="UltimateGamer95"]so does that mean that the function F(x) = x^2 + 4xy is the correct answer or did I miss something? Give me a hintmarkop2003

Your far better off doing your own homework, thanks.