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  1. M

    Tricky circular area math problem from the GRE

    Hey guys, I was wondering if anyone could help me out with this problem from the GRE practice exam: I honestly don't know how to go about solving it. I'm guessing that the answer is either B or D, however I know that in this GRE exam you can never guess... My friends think the answer is...
  2. M

    Problem with an Undamped Forced Motion

    My professor assigned us a problem where m=16 lb k=10 lb/ft a=2 t(0)=1 ft t'(0)=0 ft/sec Through this I determined the DE x''(t)+4x'(t)+20x(t)=e-t with initial conditions mentioned above. Using the method of m2+4m+20=0 I got roots of -2±4i Therefore, my...
  3. M

    % H2O of hydration unknown?

    Hi everyone, I'm new to this forum (this is actually my first post!). (PS. I'm not completely sure if this is the right place to post this thread because it said do not post homework questions... I'm not really sure if I am to call this a homework assignment though, or a homework related...