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  1. a) -2.9 x^2+28.4x -40.2 =0 2.9x^2-28.4 x+40.2=0 29x^2 -284 x +402 =0 x= [142 +/- 92.22]/29 so x=[142 +92.22]/29 = 234.22 /29 =8.076 or x=(142-92.22)/29 =191.78 /29=6.61 so the company will start to gain profit in the 7th year ( the answer 6.61) and start to lose money ar 9th year (8.076 ) for the highest profit get p' (x)=0 & it...

    3 Answers · Science & Mathematics · 11/12/2007

  2. Elio is correct in his explanation. 14 pounds = 1 stone. 14 pounds of feathers will equal 14 pounds of lead every time.

    5 Answers · Science & Mathematics · 26/03/2009

  3. Ditto Rita — missing rt. parens & nothing to "solve."...

    2 Answers · Science & Mathematics · 19/03/2015

  4. 3ˣ = x5ˣ . . . . . . [1] Ditto Mathmom — the only reason to pay attention to anonymous' answer, is...

    3 Answers · Science & Mathematics · 01/11/2015

  5. Ditto on the we-need-more-information comment. AB(C U B) = ...

    3 Answers · Science & Mathematics · 14/10/2008

  6. Ditto on the other two answers, for your subject. To your...

    3 Answers · Science & Mathematics · 19/07/2009

  7. Ditto what Geezah said, but with the additional + 20 at the end of his...

    5 Answers · Science & Mathematics · 23/12/2008

  8. Ditto for Scott. But. . . remember that perpendicular lines have ...

    2 Answers · Science & Mathematics · 08/11/2008

  9. Ditto. Composite #'s have more than 2 factors whereas Prime...

    2 Answers · Science & Mathematics · 01/10/2009

  10. Ditto Steve! lol it's fairly easy....just substitute (2) for x in the equation and solve! Steve beat me to it....darnit!

    2 Answers · Science & Mathematics · 08/03/2011

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