MadMonk Posted February 13, 2007 Share Posted February 13, 2007 OK. This one I'm actually stuck on. I promise ! If a tank holds 1000L of water, which takes an hour to drain from the bottom of the tank, then the volume V of water remaining in the tank after t minutes is: V = 1000( 1 - t/60 )^2 0 < t < 60. Find the rate at which the water is flowing out of the tank (the instantaneous rate of change of V with respect to t) after 10 min. The answer is 250L/min. No derivative rules may be used to show work. (chapter 1 still) Thanks in advance. Link to comment Share on other sites More sharing options...
Numbnut247 Posted February 13, 2007 Share Posted February 13, 2007 Updating on the tutors later... I'm hiring more. I need to finish my french first. Can someone tell me how to say: "No, u can't go to the washroom." in french? I have the yes one, and I'm too stupid to get the no answer. Link to comment Share on other sites More sharing options...
CCF4E Posted February 13, 2007 Share Posted February 13, 2007 Non, tu ne peux pas aller aux toilettes. I miss grade 8 french Link to comment Share on other sites More sharing options...
More-is-on Posted February 13, 2007 Author Share Posted February 13, 2007 I'm in grade 8 French :D Link to comment Share on other sites More sharing options...
CCF4E Posted February 13, 2007 Share Posted February 13, 2007 Sweeeeet. Thanks dudes. What school do u go to btw? The guy in grade 8 french. Link to comment Share on other sites More sharing options...
More-is-on Posted February 13, 2007 Author Share Posted February 13, 2007 Templeton, you? Link to comment Share on other sites More sharing options...
G.K. Chesterton Posted February 13, 2007 Share Posted February 13, 2007 Oh, wow. Johnston Heights Secondary for me. Link to comment Share on other sites More sharing options...
kazin! Posted February 13, 2007 Share Posted February 13, 2007 Are you allowed to use the definition of a derivative? if so, use dV/dt~[V(10.5)-V(9.5)]/(10.5-9.5) I think the answer you quoted is wrong. If that is the rate it shouldn't take 60 minutes to drain the tank. Link to comment Share on other sites More sharing options...
More-is-on Posted February 13, 2007 Author Share Posted February 13, 2007 That's what it says in the answer key. By definition of a derivative do you mean lim f(a+h) - f(a) h->0, h ? Link to comment Share on other sites More sharing options...
kazin! Posted February 13, 2007 Share Posted February 13, 2007 How about help me instead of making bad jokes 8) Link to comment Share on other sites More sharing options...
More-is-on Posted February 13, 2007 Author Share Posted February 13, 2007 How about help me instead of making bad jokes 8) Link to comment Share on other sites More sharing options...
More-is-on Posted February 13, 2007 Author Share Posted February 13, 2007 OMG. I'll update the tutors later on tonight. I hafta leave. :? Link to comment Share on other sites More sharing options...
Clark Kent Posted February 13, 2007 Share Posted February 13, 2007 If u want to be a tutor, please fill in this forum: Grade level: Type of subject u specialize: (Math, socials, etc.) Current grade in subject: How active can you be: Hours u're available: What more can you offer: ------------ If u're the one needing help, please fill out THIS forum. Grade u're in: Subject of consideration: Question: Time needed to fullfill this question: Prefered Tutor: (If any, can be left BLANK) Link to comment Share on other sites More sharing options...
cmon Posted February 13, 2007 Share Posted February 13, 2007 OK. This one I'm actually stuck on. I promise ! If a tank holds 1000L of water, which takes an hour to drain from the bottom of the tank, then the volume V of water remaining in the tank after t minutes is: V = 1000( 1 - t/60 )^2 0 < t < 60. Find the rate at which the water is flowing out of the tank (the instantaneous rate of change of V with respect to t) after 10 min. The answer is 250L/min. No derivative rules may be used to show work. (chapter 1 still) Thanks in advance. Link to comment Share on other sites More sharing options...
kazin! Posted February 13, 2007 Share Posted February 13, 2007 K I'm going to double check the answer now...but in any case, we can't use derivative rules (such as power/quotient etc.) since we're still on chapter 1 and technically haven't learned it yet. Link to comment Share on other sites More sharing options...
The Grinch Posted February 13, 2007 Share Posted February 13, 2007 Great thread. Link to comment Share on other sites More sharing options...
kazin! Posted February 13, 2007 Share Posted February 13, 2007 Oops my bad...the answer is 250/9 L/min..heh Link to comment Share on other sites More sharing options...
ltrain Posted February 13, 2007 Share Posted February 13, 2007 they should sticky this thread Link to comment Share on other sites More sharing options...
CCF4E Posted February 13, 2007 Share Posted February 13, 2007 Templeton! Zahorecz, Howell? Link to comment Share on other sites More sharing options...
More-is-on Posted February 13, 2007 Author Share Posted February 13, 2007 they should sticky this thread Link to comment Share on other sites More sharing options...
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