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Let the quantity of 50% acid solution mixed be x L THEN , the quantity of 30% acid solution mixed WILL BE ( 150- x) L 0.50x + 0.30 ( 150 -x ) = 0.42 *150 0.50x + 45 - 0.30x = 63 0.20x = 18 x = 90 ANSWER 90L of 50% AND...

3 Answers · Science & Mathematics · 17/09/2013

Exclamation points don't give faster answers, really!!!!!!!!!!!!!!!!!

2 Answers · Science & Mathematics · 11/03/2007

Reading this kind of questions, I feel like a x-y (remember Brave New World - A. Huxley). I 'd like to have time to study, to learn about this... I'll wait for an answer, by I'm afraid that noone will give a good answer - very hard...

3 Answers · Science & Mathematics · 13/03/2007

the conclusion is that nobody knows... too long a problem! sorry you can try www.calc101.com good luck!!! .

1 Answers · Science & Mathematics · 18/12/2006

#5 - Volume of a cylinder is Pi x r squared (formula for area of a circle) x height. Volume of Stick = Pi x 1.25 squared x 10.5 = 51.5 cm cubed Volume of Glue = Pi x 1.25 squared x 9.5 = 46.6 cm...

4 Answers · Science & Mathematics · 15/06/2007

Call Mrs Ren's payment R, Mrs Less's payment L, and the months passed M R = 8500 + 900M L = 5100 + 1100M Now solve 8500 + 900M = 5100 + 1100M

1 Answers · Science & Mathematics · 25/12/2010

Your answer to A) is completely correct, as C o A is the same as writing C(A(x)). As for B, well you would need to determine the number of litres that the painter uses per minute, which is A o...

1 Answers · Science & Mathematics · 16/10/2008

Let's compute the total derivative (or Jacobian or whatever you want to call it) of f, Df at an arbitrary point. To be explicit: we have F(x,y,z) = (f(x,y,z), g(x,y,z), f(x,y,z) + g(x,y,z)) for all (x,y,z) in R^3. Letting h_j denote the partial derivative of a function h with respect to...

1 Answers · Science & Mathematics · 04/11/2013

The vertex is f(9) = 33. To make the graph, just choose some x values around the vertex (see more info in http://en.wikipedia.org/wiki/Quadratic_equation ) for example: ....x ...........y -20 -247.33 -10 -87.33 0 6 9 33 20 -7.33 40 -287.33 I can't paste the figure here...

4 Answers · Science & Mathematics · 04/04/2008